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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q
QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Quarterly Period Ended September 30, 2023March 31, 2024
or
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from             to             
Commission File Number: 1-13087 (Boston Properties, Inc.)
Commission File Number: 0-50209 (Boston Properties Limited Partnership)

BOSTON PROPERTIES, INC.
BOSTON PROPERTIES LIMITED PARTNERSHIP
(Exact name of Registrants as specified in its charter)
Boston Properties, Inc.Delaware04-2473675
(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification Number)
Boston Properties Limited PartnershipDelaware04-3372948
(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification Number)
Prudential Center, 800 Boylston Street, Suite 1900, Boston, Massachusetts 02199-8103
(Address of principal executive offices) (Zip Code)
(617) 236-3300
(Registrants’ telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:
RegistrantTitle of each classTrading Symbol(s)Name of each exchange on which registered
Boston Properties, Inc.Common Stock, par value $0.01 per shareBXPNew York Stock Exchange
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  
Boston Properties, Inc.:    Yes  x   No           Boston Properties Limited Partnership:    Yes  x    No      


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Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    
Boston Properties, Inc.:    Yes  x    No           Boston Properties Limited Partnership:    Yes  x    No      
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Boston Properties, Inc.:    
Large accelerated filer  x         Accelerated filer           Non-accelerated filer           Smaller reporting company           Emerging growth company  

Boston Properties Limited Partnership:
Large accelerated filer           Accelerated filer           Non-accelerated filer  x           Smaller reporting company             Emerging growth company  
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
Boston Properties, Inc.                  Boston Properties Limited Partnership 
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    
Boston Properties, Inc.:    Yes      No  x        Boston Properties Limited Partnership:    Yes      No  x
Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.
Boston Properties, Inc.Common Stock, par value $0.01 per share156,940,180157,058,652
(Registrant)(Class)(Outstanding on October 30, 2023)May 2, 2024)


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EXPLANATORY NOTE
This report combines the Quarterly Reports on Form 10-Q for the period ended September 30, 2023March 31, 2024 of Boston Properties, Inc. and Boston Properties Limited Partnership. Unless stated otherwise or the context otherwise requires, references to “BXP” mean Boston Properties, Inc., a Delaware corporation and real estate investment trust (“REIT”), and references to “BPLP” and the “Operating Partnership” mean Boston Properties Limited Partnership, a Delaware limited partnership. BPLP is the entity through which BXP conducts substantially all of its business and owns, either directly or through subsidiaries, substantially all of its assets. BXP is the sole general partner and also a limited partner of BPLP. As the sole general partner of BPLP, BXP has exclusive control of BPLP’s day-to-day management. Therefore, unless stated otherwise or the context requires, references to the “Company,” “we,” “us” and “our” mean collectively BXP, BPLP and those entities/subsidiaries consolidated by BXP.
As of September 30, 2023,March 31, 2024, BXP owned an approximate 89.4%89.1% ownership interest in BPLP. The remaining approximate 10.6%10.9% interest was owned by limited partners. The other limited partners of BPLP (1) contributed their direct or indirect interests in properties to BPLP in exchange for common units of limited partnership interest in BPLP or (2) received long-term incentive plan units of BPLP pursuant to BXP’s Stock Option and Incentive Plans, or both. Under the limited partnership agreement of BPLP, unitholders may present their common units of BPLP for redemption at any time (subject to restrictions agreed upon at the time of issuance of the units that may restrict such right for a period of time, generally one year from issuance). Upon presentation of a common unit for redemption, BPLP must redeem the unit for cash equal to the then value of a share of BXP’s common stock. In lieu of a cash redemption by BPLP, however, BXP may elect to acquire any common units so tendered by issuing shares of BXP common stock in exchange for the common units. If BXP so elects, its common stock will be exchanged for common units on a one-for-one basis. This one-for-one exchange ratio is subject to specified adjustments to prevent dilution. BXP generally expects that it will elect to issue its common stock in connection with each such presentation for redemption rather than having BPLP pay cash. With each such exchange or redemption, BXP’s percentage ownership in BPLP will increase. In addition, whenever BXP issues shares of its common stock other than to acquire common units of BPLP, BXP must contribute any net proceeds it receives to BPLP and BPLP must issue to BXP an equivalent number of common units of BPLP. This structure is commonly referred to as an umbrella partnership REIT, or UPREIT.
The Company believes that combining the Quarterly Reports on Form 10-Q of BXP and BPLP into this single report:
enhances investors’ understanding of BXP and BPLP by enabling them to view the business as a whole in the same manner as management views and operates the business;
eliminates duplicative disclosure and provides a more concise and readable presentation because a substantial portion of the disclosure applies to both BXP and BPLP; and
creates time and cost efficiencies through the preparation of one combined report instead of two separate reports.
The Company believes it is important to understand the few differences between BXP and BPLP in the context of how BXP and BPLP operate as a consolidated company. The financial results of BPLP are consolidated into the financial statements of BXP. BXP does not have any other significant assets, liabilities or operations, other than its investment in BPLP, nor does it have employees of its own. BPLP, not BXP, generally executes all significant business relationships other than transactions involving the securities of BXP. BPLP holds substantially all of the assets of BXP, including ownership interests in subsidiaries and joint ventures. BPLP conducts the operations of the business and is structured as a partnership with no publicly traded equity. Except for the net proceeds from equity issuances by BXP, which are contributed to the capital of BPLP in exchange for common or preferred units of partnership in BPLP, as applicable, BPLP generates all remaining capital required by the Company’s business. These sources include working capital, net cash provided by operating activities, borrowings under its credit facilities, the issuance of secured and unsecured debt and equity securities and proceeds received from the disposition of certain properties and interests in joint ventures.
Shareholders’ equity, partners’ capital and noncontrolling interests are the main areas of difference between the consolidated financial statements of BXP and BPLP. The limited partners of BPLP are accounted for as partners’ capital in BPLP’s financial statements and as noncontrolling interests in BXP’s financial statements. The noncontrolling interests in BPLP’s financial statements include the interests of unaffiliated partners in various consolidated partnerships. The noncontrolling interests in BXP’s financial statements include the same


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noncontrolling interests in BPLP and limited partners of BPLP. The differences between shareholders’ equity and partners’ capital result from differences in the equity issued by each of BXP and BPLP.
In addition, the consolidated financial statements of BXP and BPLP differ in total real estate assets resulting from previously applied acquisition accounting by BXP for the issuance of common stock in connection with non-sponsor redemptions of common units of BPLP. This accounting resulted in a step-up of the real estate assets of BXP at the time of such redemptions, resulting in a difference between the net real estate of BXP as compared to BPLP of approximately $244.6$241.2 million, or 1.2% at September 30, 2023,March 31, 2024, and a corresponding difference in depreciation expense, impairment losses and gains on sales of real estate upon the sale of these properties having an allocation of the real estate step-up. The acquisition accounting was nullified on a prospective basis beginning in 2009 as a result of the Company’s adoption of a new accounting standard requiring any subsequent redemptions to be accounted for solely as an equity transaction.
To help investors better understand the key differences between BXP and BPLP, the following items in this report present information separately for BXP and BPLP:
Item 1. Financial Statements (unaudited), which includes the following specific disclosures for BXP and BPLP:
Note 3. Real Estate;
Note 10. Stockholders’ Equity / Partners’ Capital;
Note 11. Segment Information; and
Note 12. Earnings Per Share / Common Unit
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations and Liquidity and Capital Resources, includes information specific to each entity, where applicable.
This report also includes separate Part I - Item 4. Controls and Procedures and Part II - Item 2. Unregistered Sales of Equity Securities and Use of Proceeds and Issuer Purchases of Equity Securities sections for each of BXP and BPLP, as well as separate Exhibits 31 and 32 certifications for each of BXP and BPLP.




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BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES LIMITED PARTNERSHIP
FORM 10-Q
for the quarter ended September 30, 2023March 31, 2024
TABLE OF CONTENTS
 Page
ITEM 1.
Boston Properties, Inc.
Boston Properties Limited Partnership
Boston Properties, Inc. and Boston Properties Limited Partnership
ITEM 2.
ITEM 3.
ITEM 4.
ITEM 1.
ITEM 1A.
ITEM 2.
ITEM 3.
ITEM 4.
ITEM 5.
ITEM 6.
 



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PART I. FINANCIAL INFORMATION
ITEM 1—Financial Statements.



BOSTON PROPERTIES, INC.
CONSOLIDATED BALANCE SHEETS
(unaudited and in thousands, except for share and par value amounts)
BOSTON PROPERTIES, INC.
CONSOLIDATED BALANCE SHEETS
(unaudited and in thousands, except for share and par value amounts)
BOSTON PROPERTIES, INC.
CONSOLIDATED BALANCE SHEETS
(unaudited and in thousands, except for share and par value amounts)
September 30, 2023December 31, 2022
March 31, 2024March 31, 2024December 31, 2023
ASSETSASSETS
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,902,389 and $6,789,029 at September 30, 2023 and December 31, 2022, respectively)$26,031,390 $25,389,663 
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2023 and December 31, 2022, respectively)237,532 237,510 
Right of use assets - operating leases (amounts related to VIEs of $156,940 and $0 at September 30, 2023 and December 31, 2022, respectively)322,790 167,351 
Less: accumulated depreciation (amounts related to VIEs of $(1,463,949) and $(1,381,401) at September 30, 2023 and December 31, 2022, respectively)(6,723,616)(6,298,082)
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,376,175 and $7,054,075 at March 31, 2024 and December 31, 2023, respectively)
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,376,175 and $7,054,075 at March 31, 2024 and December 31, 2023, respectively)
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,376,175 and $7,054,075 at March 31, 2024 and December 31, 2023, respectively)
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at March 31, 2024 and December 31, 2023, respectively)
Right of use assets - operating leases (amounts related to VIEs of $154,217 and $158,885 at March 31, 2024 and December 31, 2023, respectively)
Less: accumulated depreciation (amounts related to VIEs of $(1,538,940) and $(1,501,483) at March 31, 2024 and December 31, 2023, respectively)
Total real estateTotal real estate19,868,096 19,496,442 
Cash and cash equivalents (amounts related to VIEs of $240,039 and $259,658 at September 30, 2023 and December 31, 2022, respectively)882,647 690,333 
Cash held in escrows47,741 46,479 
Cash and cash equivalents (amounts related to VIEs of $298,548 and $245,317 at March 31, 2024 and December 31, 2023, respectively)
Cash held in escrows (amounts related to VIEs of $4,839 and $22,160 at March 31, 2024 and December 31, 2023, respectively)
Investments in securitiesInvestments in securities32,809 32,277 
Tenant and other receivables, net (amounts related to VIEs of $36,758 and $16,521 at September 30, 2023 and December 31, 2022, respectively)123,138 81,389 
Tenant and other receivables, net (amounts related to VIEs of $27,792 and $27,987 at March 31, 2024 and December 31, 2023, respectively)
Note receivable, net
Related party note receivable, netRelated party note receivable, net88,807 78,576 
Sales-type lease receivable, netSales-type lease receivable, net13,475 12,811 
Accrued rental income, net (amounts related to VIEs of $393,227 and $367,138 at September 30, 2023 and December 31, 2022, respectively)1,331,796 1,276,580 
Deferred charges, net (amounts related to VIEs of $171,998 and $176,597 at September 30, 2023 and December 31, 2022, respectively)692,386 733,282 
Prepaid expenses and other assets (amounts related to VIEs of $46,473 and $11,647 at September 30, 2023 and December 31, 2022, respectively)121,431 43,589 
Accrued rental income, net (amounts related to VIEs of $409,628 and $401,159 at March 31, 2024 and December 31, 2023, respectively)
Deferred charges, net (amounts related to VIEs of $194,489 and $175,383 at March 31, 2024 and December 31, 2023, respectively)
Prepaid expenses and other assets (amounts related to VIEs of $45,672 and $11,824 at March 31, 2024 and December 31, 2023, respectively)
Investments in unconsolidated joint venturesInvestments in unconsolidated joint ventures1,536,822 1,715,911 
Total assetsTotal assets$24,739,148 $24,207,669 
LIABILITIES AND EQUITYLIABILITIES AND EQUITY
Liabilities:Liabilities:
Mortgage notes payable, net (amounts related to VIEs of $3,275,974 and $3,272,368 at September 30, 2023 and December 31, 2022, respectively)$3,275,974 $3,272,368 
Liabilities:
Liabilities:
Mortgage notes payable, net (amounts related to VIEs of $3,278,396 and $3,277,185 at March 31, 2024 and December 31, 2023, respectively)
Mortgage notes payable, net (amounts related to VIEs of $3,278,396 and $3,277,185 at March 31, 2024 and December 31, 2023, respectively)
Mortgage notes payable, net (amounts related to VIEs of $3,278,396 and $3,277,185 at March 31, 2024 and December 31, 2023, respectively)
Unsecured senior notes, netUnsecured senior notes, net10,488,568 10,237,968 
Unsecured line of creditUnsecured line of credit— — 
Unsecured term loan, netUnsecured term loan, net1,197,173 730,000 
Lease liabilities - finance leases (amounts related to VIEs of $20,710 and $20,604 at September 30, 2023 and December 31, 2022, respectively)253,178 249,335 
Lease liabilities - operating leases (amounts related to VIEs of $136,332 and $0 at September 30, 2023 and December 31, 2022, respectively)341,299 204,686 
Accounts payable and accrued expenses (amounts related to VIEs of $43,696 and $29,466 at September 30, 2023 and December 31, 2022, respectively)462,240 417,545 
Lease liabilities - finance leases (amounts related to VIEs of $20,831 and $20,794 at March 31, 2024 and December 31, 2023, respectively)
Lease liabilities - operating leases (amounts related to VIEs of $148,706 and $145,826 at March 31, 2024 and December 31, 2023, respectively)
Accounts payable and accrued expenses (amounts related to VIEs of $112,385 and $59,667 at March 31, 2024 and December 31, 2023, respectively)
Dividends and distributions payableDividends and distributions payable171,916 170,643 
Accrued interest payableAccrued interest payable128,422 103,774 
Other liabilities (amounts related to VIEs of $106,566 and $114,232 at September 30, 2023 and December 31, 2022, respectively)380,014 450,918 
Other liabilities (amounts related to VIEs of $105,786 and $115,275 at March 31, 2024 and December 31, 2023, respectively)
Total liabilitiesTotal liabilities16,698,784 15,837,237 
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BOSTON PROPERTIES, INC.
CONSOLIDATED BALANCE SHEETS
(unaudited and in thousands, except for share and par value amounts)
BOSTON PROPERTIES, INC.
CONSOLIDATED BALANCE SHEETS
(unaudited and in thousands, except for share and par value amounts)
BOSTON PROPERTIES, INC.
CONSOLIDATED BALANCE SHEETS
(unaudited and in thousands, except for share and par value amounts)
September 30, 2023December 31, 2022
March 31, 2024March 31, 2024December 31, 2023
Commitments and contingencies (See Note 8)Commitments and contingencies (See Note 8)
Redeemable deferred stock units— 114,124 and 97,853 units outstanding at redemption value at September 30, 2023 and December 31, 2022, respectively6,788 6,613 
Redeemable deferred stock units— 124,656 and 119,471 units outstanding at redemption value at March 31, 2024 and December 31, 2023, respectively
Redeemable deferred stock units— 124,656 and 119,471 units outstanding at redemption value at March 31, 2024 and December 31, 2023, respectively
Redeemable deferred stock units— 124,656 and 119,471 units outstanding at redemption value at March 31, 2024 and December 31, 2023, respectively
Equity:Equity:
Stockholders’ equity attributable to Boston Properties, Inc.:Stockholders’ equity attributable to Boston Properties, Inc.:
Stockholders’ equity attributable to Boston Properties, Inc.:
Stockholders’ equity attributable to Boston Properties, Inc.:
Excess stock, $0.01 par value, 150,000,000 shares authorized, none issued or outstanding
Excess stock, $0.01 par value, 150,000,000 shares authorized, none issued or outstanding
Excess stock, $0.01 par value, 150,000,000 shares authorized, none issued or outstandingExcess stock, $0.01 par value, 150,000,000 shares authorized, none issued or outstanding— — 
Preferred stock, $0.01 par value, 50,000,000 shares authorized, none issued or outstandingPreferred stock, $0.01 par value, 50,000,000 shares authorized, none issued or outstanding— — 
Common stock, $0.01 par value, 250,000,000 shares authorized, 157,018,080 and 156,836,767 issued and 156,939,180 and 156,757,867 outstanding at September 30, 2023 and December 31, 2022, respectively1,569 1,568 
Common stock, $0.01 par value, 250,000,000 shares authorized, 157,128,071 and 157,019,766 issued and 157,049,171 and 156,940,866 outstanding at March 31, 2024 and December 31, 2023, respectively
Additional paid-in capitalAdditional paid-in capital6,568,645 6,539,147 
Dividends in excess of earningsDividends in excess of earnings(782,275)(391,356)
Treasury common stock at cost, 78,900 shares at September 30, 2023 and December 31, 2022(2,722)(2,722)
Accumulated other comprehensive income (loss)2,866 (13,718)
Treasury common stock at cost, 78,900 shares at March 31, 2024 and December 31, 2023
Accumulated other comprehensive loss
Total stockholders’ equity attributable to Boston Properties, Inc.Total stockholders’ equity attributable to Boston Properties, Inc.5,788,083 6,132,919 
Noncontrolling interests:Noncontrolling interests:
Common units of Boston Properties Limited Partnership
Common units of Boston Properties Limited Partnership
Common units of Boston Properties Limited PartnershipCommon units of Boston Properties Limited Partnership656,587 683,583 
Property partnershipsProperty partnerships1,588,906 1,547,317 
Total equityTotal equity8,033,576 8,363,819 
Total liabilities and equityTotal liabilities and equity$24,739,148 $24,207,669 
















The accompanying notes are an integral part of these consolidated financial statements.
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BOSTON PROPERTIES, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS
(unaudited and in thousands, except for per share amounts)
Three months ended March 31,
Three months ended March 31,
Three months ended March 31,
Three months ended September 30,Nine months ended September 30,
2023202220232022
RevenueRevenue
Revenue
Revenue
Lease
Lease
LeaseLease$767,181 $739,255 $2,285,789 $2,179,274 
Parking and otherParking and other30,428 28,154 81,421 80,234 
Parking and other
Parking and other
Hotel
Hotel
HotelHotel13,484 11,749 35,554 28,395 
Development and management servicesDevelopment and management services9,284 7,465 28,122 19,650 
Development and management services
Development and management services
Direct reimbursements of payroll and related costs from management services contracts
Direct reimbursements of payroll and related costs from management services contracts
Direct reimbursements of payroll and related costs from management services contractsDirect reimbursements of payroll and related costs from management services contracts3,906 3,900 13,750 11,204 
Total revenueTotal revenue824,283 790,523 2,444,636 2,318,757 
Total revenue
Total revenue
Expenses
Expenses
ExpensesExpenses
OperatingOperating
Operating
Operating
Rental
Rental
RentalRental300,192 281,702 882,536 825,805 
HotelHotel9,020 8,548 23,852 19,832 
Hotel
Hotel
General and administrative
General and administrative
General and administrativeGeneral and administrative31,410 32,519 131,387 110,378 
Payroll and related costs from management services contractsPayroll and related costs from management services contracts3,906 3,900 13,750 11,204 
Payroll and related costs from management services contracts
Payroll and related costs from management services contracts
Transaction costs
Transaction costs
Transaction costsTransaction costs751 1,650 1,970 2,146 
Depreciation and amortizationDepreciation and amortization207,435 190,675 618,746 551,445 
Depreciation and amortization
Depreciation and amortization
Total expenses
Total expenses
Total expensesTotal expenses552,714 518,994 1,672,241 1,520,810 
Other income (expense)Other income (expense)
Loss from unconsolidated joint ventures(247,556)(3,524)(261,793)(1,389)
Gains on sales of real estate517 262,345 517 381,293 
Other income (expense)
Other income (expense)
Income (loss) from unconsolidated joint ventures
Income (loss) from unconsolidated joint ventures
Income (loss) from unconsolidated joint ventures
Interest and other income (loss)Interest and other income (loss)20,715 3,728 48,999 6,151 
Other income - assignment fee— — — 6,624 
Gains (losses) from investments in securities(925)(1,571)2,311 (8,549)
Unrealized gain (loss) on non-real estate investment(51)— 332 — 
Interest and other income (loss)
Interest and other income (loss)
Gains from investments in securities
Gains from investments in securities
Gains from investments in securities
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment
Impairment loss
Impairment loss
Impairment loss
Interest expenseInterest expense(147,812)(111,846)(424,492)(317,216)
Net income (loss)(103,543)420,661 138,269 864,861 
Net (income) loss attributable to noncontrolling interests
Interest expense
Interest expense
Net income
Net income
Net income
Net income attributable to noncontrolling interests
Net income attributable to noncontrolling interests
Net income attributable to noncontrolling interests
Noncontrolling interests in property partnerships
Noncontrolling interests in property partnerships
Noncontrolling interests in property partnershipsNoncontrolling interests in property partnerships(20,909)(18,801)(59,337)(54,896)
Noncontrolling interest—common units of the Operating PartnershipNoncontrolling interest—common units of the Operating Partnership12,626 (40,883)(8,642)(82,821)
Net income (loss) attributable to Boston Properties, Inc.$(111,826)$360,977 $70,290 $727,144 
Noncontrolling interest—common units of the Operating Partnership
Noncontrolling interest—common units of the Operating Partnership
Net income attributable to Boston Properties, Inc.
Net income attributable to Boston Properties, Inc.
Net income attributable to Boston Properties, Inc.
Basic earnings per common share attributable to Boston Properties, Inc.Basic earnings per common share attributable to Boston Properties, Inc.
Net income (loss)$(0.71)$2.30 $0.45 $4.63 
Basic earnings per common share attributable to Boston Properties, Inc.
Basic earnings per common share attributable to Boston Properties, Inc.
Net income
Net income
Net income
Weighted average number of common shares outstanding
Weighted average number of common shares outstanding
Weighted average number of common shares outstandingWeighted average number of common shares outstanding156,880 156,754 156,837 156,708 
Diluted earnings per common share attributable to Boston Properties, Inc.Diluted earnings per common share attributable to Boston Properties, Inc.
Net income (loss)$(0.71)$2.29 $0.45 $4.62 
Diluted earnings per common share attributable to Boston Properties, Inc.
Diluted earnings per common share attributable to Boston Properties, Inc.
Net income
Net income
Net income
Weighted average number of common and common equivalent shares outstandingWeighted average number of common and common equivalent shares outstanding156,880 157,133 157,177 157,144 
Weighted average number of common and common equivalent shares outstanding
Weighted average number of common and common equivalent shares outstanding



The accompanying notes are an integral part of these consolidated financial statements.
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BOSTON PROPERTIES, INC.
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
(unaudited and in thousands)
 
Three months ended September 30,Nine months ended September 30,
 2023202220232022
Net income (loss)$(103,543)$420,661 $138,269 $864,861 
Other comprehensive income:
Effective portion of interest rate contracts5,459 10,800 13,886 18,400 
Amortization of interest rate contracts (1)1,677 1,677 5,026 5,030 
Other comprehensive income7,136 12,477 18,912 23,430 
Comprehensive income (loss)(96,407)433,138 157,181 888,291 
Net income attributable to noncontrolling interests(8,283)(59,684)(67,979)(137,717)
Other comprehensive income attributable to noncontrolling interests(864)(1,390)(2,327)(2,757)
Comprehensive income (loss) attributable to Boston Properties, Inc.$(105,554)$372,064 $86,875 $747,817 
Three months ended March 31,
 20242023
Net income$106,604 $105,628 
Other comprehensive income:
Effective portion of interest rate contracts16,351 (6,538)
Amortization of interest rate contracts (1)3,360 1,675 
Other comprehensive income (loss)19,711 (4,863)
Comprehensive income126,315 100,765 
Net income attributable to noncontrolling interests(26,721)(27,738)
Other comprehensive (income) loss attributable to noncontrolling interests(2,184)368 
Comprehensive income attributable to Boston Properties, Inc.$97,410 $73,395 
_______________
(1)Amounts reclassified from comprehensive income primarily to interest expense within Boston Properties, Inc.’s Consolidated Statements of Operations.






























The accompanying notes are an integral part of these consolidated financial statements.
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BOSTON PROPERTIES, INC.
CONSOLIDATED STATEMENTS OF EQUITY
(unaudited and in thousands)
BOSTON PROPERTIES, INC.
CONSOLIDATED STATEMENTS OF EQUITY
(unaudited and in thousands)
BOSTON PROPERTIES, INC.
CONSOLIDATED STATEMENTS OF EQUITY
(unaudited and in thousands)
Common StockAdditional Paid-in CapitalDividends in Excess of EarningsTreasury Stock,
at cost
Accumulated Other Comprehensive LossNoncontrolling Interests - Common UnitsNoncontrolling Interests - Property PartnershipsTotal Common StockAdditional Paid-in CapitalDividends in Excess of EarningsTreasury Stock,
at cost
Accumulated Other Comprehensive LossNoncontrolling Interests - Common UnitsNoncontrolling Interests - Property PartnershipsTotal
SharesAmount
Equity, June 30, 2023156,854 $1,569 $6,561,161 $(516,550)$(2,722)$(3,406)$689,123 $1,557,368 $8,286,543 
Redemption of operating partnership units to common stock79 — 2,920 — — — (2,920)— — 
Allocated net income (loss) for the period— — — (111,925)— — (12,527)20,909 (103,543)
Dividends/distributions declared— — — (153,800)— — (18,301)— (172,101)
Shares issued pursuant to stock purchase plan10 — 570 — — — — — 570 
Net activity from stock option and incentive plan(4)— 421 — — — 4,065 — 4,486 
Contributions from noncontrolling interests in property partnerships— — — — — — — 5,116 5,116 
Non-cash contributions from noncontrolling interests in property partnerships— — — — — — — 17,519 17,519 
Distributions to noncontrolling interests in property partnerships— — — — — — — (12,150)(12,150)
Effective portion of interest rate contracts— — — — — 4,896 563 — 5,459 
Amortization of interest rate contracts— — — — — 1,376 157 144 1,677 
Reallocation of noncontrolling interest— — 3,573 — — — (3,573)— — 
Equity, September 30, 2023156,939 $1,569 $6,568,645 $(782,275)$(2,722)$2,866 $656,587 $1,588,906 $8,033,576 
Equity, June 30, 2022156,726 $1,567 $6,524,997 $(567,016)$(2,722)$(27,077)$660,214 $1,552,706 $8,142,669 
Equity, December 31, 2023
Equity, December 31, 2023
Equity, December 31, 2023
Redemption of operating partnership units to common stockRedemption of operating partnership units to common stock26 958 — — — (959)— — 
Allocated net income for the periodAllocated net income for the period— — — 361,100 — — 40,760 18,801 420,661 
Dividends/distributions declaredDividends/distributions declared— — — (153,620)— — (17,930)— (171,550)
Shares issued pursuant to stock purchase planShares issued pursuant to stock purchase plan— 436 — — — — — 436 
Net activity from stock option and incentive planNet activity from stock option and incentive plan(2)— 1,648 — — — 6,880 — 8,528 
Proceeds from sale of interest in property partnerships and contributions from noncontrolling interests in property partnerships
Distributions to noncontrolling interests in property partnershipsDistributions to noncontrolling interests in property partnerships— — — — — — — (20,150)(20,150)
Effective portion of interest rate contractsEffective portion of interest rate contracts— — — — — 9,709 1,091 — 10,800 
Amortization of interest rate contractsAmortization of interest rate contracts— — — — — 1,377 156 144 1,677 
Reallocation of noncontrolling interestReallocation of noncontrolling interest— — 4,260 — — — (4,260)— — 
Equity, September 30, 2022156,755 $1,568 $6,532,299 $(359,536)$(2,722)$(15,991)$685,952 $1,551,501 $8,393,071 
Equity, March 31, 2024
Equity, December 31, 2022
Equity, December 31, 2022
Equity, December 31, 2022
Redemption of operating partnership units to common stock
Allocated net income for the period
Dividends/distributions declared
Shares issued pursuant to stock purchase plan
Net activity from stock option and incentive plan
Contributions from noncontrolling interests in property partnerships
Distributions to noncontrolling interests in property partnerships
Effective portion of interest rate contracts
Amortization of interest rate contracts
Reallocation of noncontrolling interest
Equity, March 31, 2023




The accompanying notes are an integral part of these consolidated financial statements.

5

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BOSTON PROPERTIES, INC.
CONSOLIDATED STATEMENTS OF EQUITY
 (unaudited and in thousands)
Common StockAdditional Paid-in CapitalDividends in Excess of EarningsTreasury Stock,
at cost
Accumulated Other Comprehensive LossNoncontrolling Interests - Common UnitsNoncontrolling Interests - Property PartnershipsTotal
SharesAmount
Equity, December 31, 2022156,758 $1,568 $6,539,147 $(391,356)$(2,722)$(13,718)$683,583 $1,547,317 $8,363,819 
Redemption of operating partnership units to common stock100 3,713 — — — (3,714)— — 
Allocated net income for the period— — — 70,290 — — 8,642 59,337 138,269 
Dividends/distributions declared— — — (461,209)— — (55,038)— (516,247)
Shares issued pursuant to stock purchase plan19 — 1,156 — — — — — 1,156 
Net activity from stock option and incentive plan62 — 3,759 — — — 42,088 — 45,847 
Contributions from noncontrolling interests in property partnerships— — — — — — — 12,671 12,671 
Non-cash contributions from noncontrolling interests in property partnerships— — — — — — — 17,519 17,519 
Distributions to noncontrolling interests in property partnerships— — — — — — — (48,370)(48,370)
Effective portion of interest rate contracts— — — — — 12,461 1,425 — 13,886 
Amortization of interest rate contracts— — — — — 4,123 471 432 5,026 
Reallocation of noncontrolling interest— — 20,870 — — — (20,870)— — 
Equity, September 30, 2023156,939 $1,569 $6,568,645 $(782,275)$(2,722)$2,866 $656,587 $1,588,906 $8,033,576 
Equity, December 31, 2021156,545 $1,565 $6,497,730 $(625,891)$(2,722)$(36,662)$642,655 $1,556,553 $8,033,228 
Redemption of operating partnership units to common stock178 6,385 — — — (6,388)— — 
Allocated net income for the period— — — 727,144 — — 82,821 54,896 864,861 
Dividends/distributions declared— — — (460,789)— — (53,789)— (514,578)
Shares issued pursuant to stock purchase plan10 — 1,036 — — — — — 1,036 
Net activity from stock option and incentive plan22 — 5,935 — — — 39,539 — 45,474 
Contributions from noncontrolling interests in property partnerships— — — — — — — 849 849 
Distributions to noncontrolling interests in property partnerships— — — — — — — (61,229)(61,229)
Effective portion of interest rate contracts— — — — — 16,540 1,860 — 18,400 
Amortization of interest rate contracts— — — — — 4,131 467 432 5,030 
Reallocation of noncontrolling interest— — 21,213 — — — (21,213)— — 
Equity, September 30, 2022156,755 $1,568 $6,532,299 $(359,536)$(2,722)$(15,991)$685,952 $1,551,501 $8,393,071 
BOSTON PROPERTIES, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(unaudited and in thousands)
 Three months ended March 31,
 20242023
Cash flows from operating activities:
Net income$106,604 $105,628 
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization218,716 208,734 
Impairment loss13,615 — 
Amortization of right of use assets - operating leases1,441 652 
Non-cash compensation expense18,873 26,262 
(Income) loss from unconsolidated joint ventures(19,186)7,569 
Distributions of net cash flow from operations of unconsolidated joint ventures8,643 5,996 
Gains from investments in securities(2,272)(1,665)
Allowance for current expected credit losses (gains)45 
Non-cash portion of interest expense12,109 7,387 
Unrealized (gain) loss on non-real estate investment(396)(259)
Change in assets and liabilities:
Tenant and other receivables, net29,454 7,518 
Accrued rental income, net(35,945)(18,619)
Prepaid expenses and other assets(74,705)(97,762)
Right of use assets - operating lease(750)— 
Lease liabilities - operating leases(1,241)(251)
Accounts payable and accrued expenses(20,725)(8,505)
Accrued interest payable(14,171)10,626 
Other liabilities(12,846)16,565 
Tenant leasing costs(29,627)(35,911)
Total adjustments90,991 128,382 
Net cash provided by operating activities197,595 234,010 
Cash flows from investing activities:
Construction in progress(181,636)(119,682)
Building and other capital improvements(32,087)(39,100)
Tenant improvements(53,377)(67,175)
Acquisition of real estate (net of cash received upon consolidation)6,086 — 
Capital contributions to unconsolidated joint ventures(26,457)(60,745)
Investment in non-real estate investments— (733)
Issuance of note receivables (including related party)(573)— 
Investments in securities, net1,425 1,843 
Net cash used in investing activities(286,619)(285,592)
Cash flows from financing activities:
Repayments of mortgage notes payable(804)— 
Repayment / redemption of unsecured senior notes(700,000)— 
Borrowings on unsecured term loan— 1,200,000 
Payments on finance lease obligations(3,160)— 
Repayment of unsecured term loan— (730,000)
Deferred financing costs(108)(6,213)
Net activity from equity transactions(2,136)586 
Dividends and distributions(171,794)(171,270)
6

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BOSTON PROPERTIES, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(unaudited and in thousands)
 Three months ended March 31,
 20242023
Proceeds from sale of interest in property partnerships and contributions from noncontrolling interests in property partnerships141,118 7,555 
Distributions to noncontrolling interests in property partnerships(20,025)(21,606)
Net cash provided by (used in) financing activities(756,909)279,052 
Net increase (decrease) in cash and cash equivalents and cash held in escrows(845,933)227,470 
Cash and cash equivalents and cash held in escrows, beginning of period1,612,567 736,812 
Cash and cash equivalents and cash held in escrows, end of period$766,634 $964,282 
Reconciliation of cash and cash equivalents and cash held in escrows:
Cash and cash equivalents, beginning of period$1,531,477 $690,333 
Cash held in escrows, beginning of period81,090 46,479 
Cash and cash equivalents and cash held in escrows, beginning of period$1,612,567 $736,812 
Cash and cash equivalents, end of period$701,695 $918,952 
Cash held in escrows, end of period64,939 45,330 
Cash and cash equivalents and cash held in escrows, end of period$766,634 $964,282 
Supplemental disclosures:
Cash paid for interest$180,717 $125,698 
Interest capitalized$9,381 $10,589 
Non-cash investing and financing activities:
Write-off of fully depreciated real estate$(27,993)$(56,391)
Change in real estate included in accounts payable and accrued expenses$(48,518)$11,692 
Right of use assets obtained in exchange for lease liabilities - operating lease$25,637 $— 
Non-cash distributions to noncontrolling interests in property, net$52,786 $— 
Capitalized operating lease costs$7,548 $— 
Investment in unconsolidated joint ventures eliminated upon consolidation$(11,834)$— 
Mortgage note payable recorded upon consolidation$207,093 $— 
Real estate and intangibles recorded upon consolidation$(220,015)$— 
Dividends and distributions declared but not paid$172,154 $171,427 
Conversions of noncontrolling interests to stockholders’ equity$1,303 $195 
Issuance of restricted securities to employees and non-employee directors$41,989 $46,516 





The accompanying notes are an integral part of these consolidated financial statements.
67

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BOSTON PROPERTIES, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(unaudited and in thousands)
 Nine months ended September 30,
 20232022
Cash flows from operating activities:
Net income (loss)$138,269 $864,861 
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization618,746 551,445 
Amortization of right of use assets - operating leases1,502 1,843 
Non-cash compensation expense46,699 44,208 
Loss from unconsolidated joint ventures261,793 1,389 
Distributions of net cash flow from operations of unconsolidated joint ventures21,871 20,511 
Losses (gains) from investments in securities(2,311)8,549 
Allowance for current expected credit losses302 (476)
Non-cash portion of interest expense22,541 19,704 
Other income - assignment fee— (6,624)
Gains on sales of real estate(517)(381,293)
Unrealized gain on non-real estate investment(332)— 
Change in assets and liabilities:
Tenant and other receivables, net(13,467)4,133 
Notes receivable, net— (152)
Accrued rental income, net(72,190)(76,268)
Prepaid expenses and other assets(76,621)(46,104)
Right of use assets - operating lease(25,640)— 
Lease liabilities - operating leases282 447 
Accounts payable and accrued expenses40,914 3,167 
Accrued interest payable24,648 (2,900)
Other liabilities(6,254)(35,490)
Tenant leasing costs(65,863)(58,547)
Total adjustments776,103 47,542 
Net cash provided by operating activities914,372 912,403 
Cash flows from investing activities:
Acquisitions of real estate— (1,320,273)
Construction in progress(361,625)(384,083)
Building and other capital improvements(117,393)(112,755)
Tenant improvements(244,841)(139,986)
Proceeds from sales of real estate517 695,231 
Proceeds from assignment fee— 6,624 
Capital contributions to unconsolidated joint ventures(148,875)(109,643)
Capital distributions from unconsolidated joint ventures7,350 36,622 
Investment in non-real estate investments(1,990)— 
Issuance of related party note receivable(10,500)— 
Proceeds from notes receivable— 10,000 
Investments in securities, net1,779 5,043 
Net cash used in investing activities(875,578)(1,313,220)

BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED BALANCE SHEETS
(unaudited and in thousands, except for unit amounts)
March 31, 2024December 31, 2023
ASSETS
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,376,175 and $7,054,075 at March 31, 2024 and December 31, 2023, respectively)$26,696,783 $26,382,944 
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at March 31, 2024 and December 31, 2023, respectively)401,486 401,680 
Right of use assets - operating leases (amounts related to VIEs of $154,217 and $158,885 at March 31, 2024 and December 31, 2023, respectively)344,255 324,298 
Less: accumulated depreciation (amounts related to VIEs of $(1,538,940) and $(1,501,483) at March 31, 2024 and December 31, 2023, respectively)(6,915,437)(6,758,361)
Total real estate20,527,087 20,350,561 
Cash and cash equivalents (amounts related to VIEs of $298,548 and $245,317 at March 31, 2024 and December 31, 2023, respectively)701,695 1,531,477 
Cash held in escrows (amounts related to VIEs of $4,839 and $22,160 at December 31, 2023 and December 31, 2022, respectively)64,939 81,090 
Investments in securities37,184 36,337 
Tenant and other receivables, net (amounts related to VIEs of $27,792 and $27,987 at March 31, 2024 and December 31, 2023, respectively)94,115 122,407 
Note receivable, net2,274 1,714 
Related party note receivable, net88,789 88,779 
Sales-type lease receivable, net13,943 13,704 
Accrued rental income, net (amounts related to VIEs of $409,628 and $401,159 at March 31, 2024 and December 31, 2023, respectively)1,390,217 1,355,212 
Deferred charges, net (amounts related to VIEs of $194,489 and $175,383 at March 31, 2024 and December 31, 2023, respectively)818,424 760,421 
Prepaid expenses and other assets (amounts related to VIEs of $45,672 and $11,824 at March 31, 2024 and December 31, 2023, respectively)146,286 64,230 
Investments in unconsolidated joint ventures1,399,824 1,377,319 
Total assets$25,284,777 $25,783,251 
LIABILITIES AND CAPITAL
Liabilities:
Mortgage notes payable, net (amounts related to VIEs of $3,278,396 and $3,277,185 at March 31, 2024 and December 31, 2023, respectively)$4,368,367 $4,166,379 
Unsecured senior notes, net9,794,527 10,491,617 
Unsecured line of credit— — 
Unsecured term loan, net1,199,430 1,198,301 
Lease liabilities - finance leases (amounts related to VIEs of $20,831 and $20,794 at March 31, 2024 and December 31, 2023, respectively)415,888 417,961 
Lease liabilities - operating leases (amounts related to VIEs of $148,706 and $145,826 at March 31, 2024 and December 31, 2023, respectively)377,667 350,391 
Accounts payable and accrued expenses (amounts related to VIEs of $112,385 and $59,667 at March 31, 2024 and December 31, 2023, respectively)374,681 458,329 
Dividends and distributions payable172,154 171,176 
Accrued interest payable119,573 133,684 
Other liabilities (amounts related to VIEs of $105,786 and $115,275 at March 31, 2024 and December 31, 2023, respectively)417,978 445,947 
Total liabilities17,240,265 17,833,785 
Commitments and contingencies (See Note 8)
Redeemable deferred stock units— 124,656 and 119,471 units outstanding at redemption value at March 31, 2024 and December 31, 2023, respectively8,141 8,383 
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BOSTON PROPERTIES, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(unaudited and in thousands)
 Nine months ended September 30,
 20232022
Cash flows from financing activities:
Proceeds from unsecured senior notes747,727 — 
Repayment / redemption of unsecured senior notes(500,000)— 
Borrowings on unsecured line of credit— 885,000 
Repayments of unsecured line of credit— (690,000)
Borrowings on unsecured term loan1,200,000 730,000 
Repayment of unsecured term loan(730,000)— 
Deferred financing costs(12,639)(2,230)
Net activity from equity transactions367 (359)
Dividends and distributions(514,974)(513,486)
Contributions from noncontrolling interests in property partnerships12,671 849 
Distributions to noncontrolling interests in property partnerships(48,370)(61,229)
Net cash provided by financing activities154,782 348,545 
Net increase (decrease) in cash and cash equivalents and cash held in escrows193,576 (52,272)
Cash and cash equivalents and cash held in escrows, beginning of period736,812 501,158 
Cash and cash equivalents and cash held in escrows, end of period$930,388 $448,886 
Reconciliation of cash and cash equivalents and cash held in escrows:
Cash and cash equivalents, beginning of period$690,333 $452,692 
Cash held in escrows, beginning of period46,479 48,466 
Cash and cash equivalents and cash held in escrows, beginning of period$736,812 $501,158 
Cash and cash equivalents, end of period$882,647 $375,774 
Cash held in escrows, end of period47,741 73,112 
Cash and cash equivalents and cash held in escrows, end of period$930,388 $448,886 
Supplemental disclosures:
Cash paid for interest$404,016 $339,067 
Interest capitalized$33,426 $40,048 
Non-cash investing and financing activities:
Write-off of fully depreciated real estate$(111,154)$(95,996)
Change in real estate included in accounts payable and accrued expenses$29,435 $29,290 
Right of use assets obtained in exchange for lease liabilities$134,509 $— 
Non-cash contributions from noncontrolling interests in property partnerships$17,519 $— 
Capitalized operating lease costs$5,031 $— 
Construction in progress from prepaid expenses and other assets$25,577 $— 
Construction in progress, net deconsolidated$— $(11,316)
Investment in unconsolidated joint ventures recorded upon deconsolidation$— $11,316 
Dividends and distributions declared but not paid$171,916 $170,952 
Conversions of noncontrolling interests to stockholders’ equity$3,714 $6,388 
Issuance of restricted securities to employees and non-employee directors$48,121 $48,605 

The accompanying notes are an integral part of these consolidated financial statements.
8

Table of Contents

BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED BALANCE SHEETS
(unaudited and in thousands, except for unit amounts)
September 30, 2023December 31, 2022
ASSETS
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,902,389 and $6,789,029 at September 30, 2023 and December 31, 2022, respectively)$25,665,125 $25,022,149 
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2023 and December 31, 2022, respectively)237,532 237,510 
Right of use assets - operating leases (amounts related to VIEs of $156,940 and $0 at September 30, 2023 and December 31, 2022, respectively)322,790 167,351 
Less: accumulated depreciation (amounts related to VIEs of $(1,463,949) and $(1,381,401) at September 30, 2023 and December 31, 2022, respectively)(6,601,957)(6,180,474)
Total real estate19,623,490 19,246,536 
Cash and cash equivalents (amounts related to VIEs of $240,039 and $259,658 at September 30, 2023 and December 31, 2022, respectively)882,647 690,333 
Cash held in escrows47,741 46,479 
Investments in securities32,809 32,277 
Tenant and other receivables, net (amounts related to VIEs of $36,758 and $16,521 at September 30, 2023 and December 31, 2022, respectively)123,138 81,389 
Related party note receivable, net88,807 78,576 
Sales-type lease receivable, net13,475 12,811 
Accrued rental income, net (amounts related to VIEs of $393,227 and $367,138 at September 30, 2023 and December 31, 2022, respectively)1,331,796 1,276,580 
Deferred charges, net (amounts related to VIEs of $171,998 and $176,597 at September 30, 2023 and December 31, 2022, respectively)692,386 733,282 
Prepaid expenses and other assets (amounts related to VIEs of $46,473 and $11,647 at September 30, 2023 and December 31, 2022, respectively)121,431 43,589 
Investments in unconsolidated joint ventures1,536,822 1,715,911 
Total assets$24,494,542 $23,957,763 
LIABILITIES AND CAPITAL
Liabilities:
Mortgage notes payable, net (amounts related to VIEs of $3,275,974 and $3,272,368 at September 30, 2023 and December 31, 2022, respectively)$3,275,974 $3,272,368 
Unsecured senior notes, net10,488,568 10,237,968 
Unsecured line of credit— — 
Unsecured term loan, net1,197,173 730,000 
Lease liabilities - finance leases (amounts related to VIEs of $20,710 and $20,604 at September 30, 2023 and December 31, 2022, respectively)253,178 249,335 
Lease liabilities - operating leases (amounts related to VIEs of $136,332 and $0 at September 30, 2023 and December 31, 2022, respectively)341,299 204,686 
Accounts payable and accrued expenses (amounts related to VIEs of $43,696 and $29,466 at September 30, 2023 and December 31, 2022, respectively)462,240 417,545 
Dividends and distributions payable171,916 170,643 
Accrued interest payable128,422 103,774 
Other liabilities (amounts related to VIEs of $106,566 and $114,232 at September 30, 2023 and December 31, 2022, respectively)380,014 450,918 
Total liabilities16,698,784 15,837,237 
Commitments and contingencies (See Note 8)
Redeemable deferred stock units— 114,124 and 97,853 units outstanding at redemption value at September 30, 2023 and December 31, 2022, respectively6,788 6,613 
9

Table of Contents
BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED BALANCE SHEETS
(unaudited and in thousands, except for unit amounts)
BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED BALANCE SHEETS
(unaudited and in thousands, except for unit amounts)
BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED BALANCE SHEETS
(unaudited and in thousands, except for unit amounts)
September 30, 2023December 31, 2022
March 31, 2024March 31, 2024December 31, 2023
Noncontrolling interests:Noncontrolling interests:
Redeemable partnership units— 16,509,597 and 16,531,172 common units and 2,072,732 and 1,679,175 long term incentive units outstanding at redemption value at September 30, 2023 and December 31, 2022, respectively1,160,753 1,280,886 
Redeemable partnership units— 16,492,171 and 16,508,277 common units and 2,666,636 and 2,065,861 long term incentive units outstanding at redemption value at March 31, 2024 and December 31, 2023, respectively
Redeemable partnership units— 16,492,171 and 16,508,277 common units and 2,666,636 and 2,065,861 long term incentive units outstanding at redemption value at March 31, 2024 and December 31, 2023, respectively
Redeemable partnership units— 16,492,171 and 16,508,277 common units and 2,666,636 and 2,065,861 long term incentive units outstanding at redemption value at March 31, 2024 and December 31, 2023, respectively
Capital:Capital:
Boston Properties Limited Partnership partners’ capital— 1,755,215 and 1,749,682 general partner units and 155,183,965 and 155,008,185 limited partner units outstanding at September 30, 2023 and December 31, 2022, respectively5,036,445 5,299,428 
Accumulated other comprehensive income (loss)2,866 (13,718)
Boston Properties Limited Partnership partners’ capital— 1,762,080 and 1,755,150 general partner units and 155,287,091 and 155,185,716 limited partner units outstanding at March 31, 2024 and December 31, 2023, respectively
Boston Properties Limited Partnership partners’ capital— 1,762,080 and 1,755,150 general partner units and 155,287,091 and 155,185,716 limited partner units outstanding at March 31, 2024 and December 31, 2023, respectively
Boston Properties Limited Partnership partners’ capital— 1,762,080 and 1,755,150 general partner units and 155,287,091 and 155,185,716 limited partner units outstanding at March 31, 2024 and December 31, 2023, respectively
Accumulated other comprehensive loss
Total partners’ capitalTotal partners’ capital5,039,311 5,285,710 
Noncontrolling interests in property partnershipsNoncontrolling interests in property partnerships1,588,906 1,547,317 
Total capitalTotal capital6,628,217 6,833,027 
Total liabilities and capitalTotal liabilities and capital$24,494,542 $23,957,763 





























The accompanying notes are an integral part of these consolidated financial statements.
109

Table of Contents
BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED STATEMENTS OF OPERATIONS
(unaudited and in thousands, except for per unit amounts)
Three months ended September 30,Nine months ended September 30,
2023202220232022
RevenueRevenue
Revenue
Revenue
Lease
Lease
LeaseLease$767,181 $739,255 $2,285,789 $2,179,274 
Parking and otherParking and other30,428 28,154 81,421 80,234 
Parking and other
Parking and other
Hotel
Hotel
HotelHotel13,484 11,749 35,554 28,395 
Development and management servicesDevelopment and management services9,284 7,465 28,122 19,650 
Development and management services
Development and management services
Direct reimbursements of payroll and related costs from management services contracts
Direct reimbursements of payroll and related costs from management services contracts
Direct reimbursements of payroll and related costs from management services contractsDirect reimbursements of payroll and related costs from management services contracts3,906 3,900 13,750 11,204 
Total revenueTotal revenue824,283 790,523 2,444,636 2,318,757 
Total revenue
Total revenue
Expenses
Expenses
ExpensesExpenses
OperatingOperating
Operating
Operating
Rental
Rental
RentalRental300,192 281,702 882,536 825,805 
HotelHotel9,020 8,548 23,852 19,832 
Hotel
Hotel
General and administrative
General and administrative
General and administrativeGeneral and administrative31,410 32,519 131,387 110,378 
Payroll and related costs from management services contractsPayroll and related costs from management services contracts3,906 3,900 13,750 11,204 
Payroll and related costs from management services contracts
Payroll and related costs from management services contracts
Transaction costs
Transaction costs
Transaction costsTransaction costs751 1,650 1,970 2,146 
Depreciation and amortizationDepreciation and amortization205,679 188,969 613,446 546,271 
Depreciation and amortization
Depreciation and amortization
Total expenses
Total expenses
Total expensesTotal expenses550,958 517,288 1,666,941 1,515,636 
Other income (expense)Other income (expense)
Loss from unconsolidated joint ventures(247,556)(3,524)(261,793)(1,389)
Gains on sales of real estate517 262,357 517 385,349 
Interest and other income (loss)20,715 3,728 48,999 6,151 
Other income - assignment fee— — — 6,624 
Gains (losses) from investments in securities(925)(1,571)2,311 (8,549)
Unrealized gain (loss) on non-real estate investment(51)— 332 — 
Interest expense(147,812)(111,846)(424,492)(317,216)
Net income (loss)(101,787)422,379 143,569 874,091 
Net (income) loss attributable to noncontrolling interests
Noncontrolling interests in property partnerships(20,909)(18,801)(59,337)(54,896)
Net income (loss) attributable to Boston Properties Limited Partnership$(122,696)$403,578 $84,232 $819,195 
Other income (expense)
Other income (expense)
Income (loss) from unconsolidated joint ventures
Income (loss) from unconsolidated joint ventures
Income (loss) from unconsolidated joint ventures
Interest and other income (loss)
Interest and other income (loss)
Interest and other income (loss)
Gains from investments in securities
Gains from investments in securities
Gains from investments in securities
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment
Impairment loss
Impairment loss
Impairment loss
Interest expense
Interest expense
Interest expense
Net income
Net income
Net income
Net income attributable to noncontrolling interests
Net income attributable to noncontrolling interests
Net income attributable to noncontrolling interests
Noncontrolling interests in property partnerships
Noncontrolling interests in property partnerships
Noncontrolling interests in property partnerships
Net income attributable to Boston Properties Limited Partnership
Net income attributable to Boston Properties Limited Partnership
Net income attributable to Boston Properties Limited Partnership
Basic earnings per common unit attributable to Boston Properties Limited PartnershipBasic earnings per common unit attributable to Boston Properties Limited Partnership
Net income (loss)$(0.70)$2.31 $0.48 $4.69 
Basic earnings per common unit attributable to Boston Properties Limited Partnership
Basic earnings per common unit attributable to Boston Properties Limited Partnership
Net income
Net income
Net income
Weighted average number of common units outstanding
Weighted average number of common units outstanding
Weighted average number of common units outstandingWeighted average number of common units outstanding174,882 174,416 174,765 174,339 
Diluted earnings per common unit attributable to Boston Properties Limited PartnershipDiluted earnings per common unit attributable to Boston Properties Limited Partnership
Net income (loss)$(0.70)$2.30 $0.48 $4.68 
Diluted earnings per common unit attributable to Boston Properties Limited Partnership
Diluted earnings per common unit attributable to Boston Properties Limited Partnership
Net income
Net income
Net income
Weighted average number of common and common equivalent units outstandingWeighted average number of common and common equivalent units outstanding174,882 174,795 175,105 174,775 
Weighted average number of common and common equivalent units outstanding
Weighted average number of common and common equivalent units outstanding




The accompanying notes are an integral part of these consolidated financial statements.
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BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
(unaudited and in thousands)
 
Three months ended September 30,Nine months ended September 30,
2023202220232022
Net income (loss)$(101,787)$422,379 $143,569 $874,091 
Net income
Net income
Net income
Other comprehensive income:
Other comprehensive income:
Other comprehensive income:Other comprehensive income:
Effective portion of interest rate contractsEffective portion of interest rate contracts5,459 10,800 13,886 18,400 
Effective portion of interest rate contracts
Effective portion of interest rate contracts
Amortization of interest rate contracts (1)Amortization of interest rate contracts (1)1,677 1,677 5,026 5,030 
Other comprehensive income7,136 12,477 18,912 23,430 
Comprehensive income (loss)(94,651)434,856 162,481 897,521 
Amortization of interest rate contracts (1)
Amortization of interest rate contracts (1)
Other comprehensive income (loss)
Other comprehensive income (loss)
Other comprehensive income (loss)
Comprehensive income
Comprehensive income
Comprehensive income
Comprehensive income attributable to noncontrolling interestsComprehensive income attributable to noncontrolling interests(21,053)(18,945)(59,769)(55,328)
Comprehensive income (loss) attributable to Boston Properties Limited Partnership$(115,704)$415,911 $102,712 $842,193 
Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to noncontrolling interests
Comprehensive income attributable to Boston Properties Limited Partnership
Comprehensive income attributable to Boston Properties Limited Partnership
Comprehensive income attributable to Boston Properties Limited Partnership
_______________
(1)Amounts reclassified from comprehensive income primarily to interest expense within Boston Properties Limited Partnership’s Consolidated Statements of Operations.


































The accompanying notes are an integral part of these consolidated financial statements.
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BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED STATEMENTS OF CAPITAL AND NONCONTROLLING INTERESTS
(unaudited and in thousands)
UnitsCapital
 General PartnerLimited PartnerPartners’ Capital (General and Limited Partners)Accumulated
Other
Comprehensive Loss
Noncontrolling
Interests - Property Partnerships
Total CapitalNoncontrolling Interests - Redeemable Partnership Units
Equity, December 31, 20231,755 155,185 $4,973,951 $(21,147)$1,640,704 $6,593,508 $1,347,575 
Net activity from contributions and unearned compensation68 2,862 — — 2,862 14,269 
Allocated net income for the period— — 81,580 — 17,221 98,801 9,500 
Distributions— — (153,908)— — (153,908)(18,864)
Conversion of redeemable partnership units34 1,303 — — 1,303 (1,303)
Adjustment to reflect redeemable partnership units at redemption value— — 52,808 — — 52,808 (52,808)
Effective portion of interest rate contracts— — — 14,646 — 14,646 1,705 
Amortization of interest rate contracts— — — 2,881 144 3,025 335 
Proceeds from sale of interest in property partnerships and contributions from noncontrolling interests in property partnerships— — 46,082 — 96,860 142,942 — 
Distributions to noncontrolling interests in property partnerships— — — — (20,025)(20,025)— 
Equity, March 31, 20241,762 155,287 $5,004,678 $(3,620)$1,734,904 $6,735,962 $1,300,409 
Equity, December 31, 20221,750 155,008 $5,299,428 $(13,718)$1,547,317 $6,833,027 $1,280,886 
Net activity from contributions and unearned compensation62 4,032 — — 4,032 23,973 
Allocated net income for the period— — 79,752 — 18,660 98,412 9,078 
Distributions— — (153,693)— — (153,693)(18,361)
Conversion of redeemable partnership units— 195 — — 195 (195)
Adjustment to reflect redeemable partnership units at redemption value— — 220,222 — — 220,222 (220,222)
Effective portion of interest rate contracts— — — (5,870)— (5,870)(668)
Amortization of interest rate contracts— — — 1,374 144 1,518 157 
Contributions from noncontrolling interests in property partnerships— — — — 7,555 7,555 — 
Distributions to noncontrolling interests in property partnerships— — — — (21,606)(21,606)— 
Equity, March 31, 20231,755 155,075 $5,449,936 $(18,214)$1,552,070 $6,983,792 $1,074,648 

The accompanying notes are an integral part of these consolidated financial statements.
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BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED STATEMENTS OF CAPITAL AND NONCONTROLLING INTERESTS
(unaudited and in thousands)
UnitsCapital
 General PartnerLimited PartnerPartners’ Capital (General and Limited Partners)Accumulated
Other
Comprehensive Loss
Noncontrolling
Interests - Property Partnerships
Total CapitalNoncontrolling Interests - Redeemable Partnership Units
Equity, June 30, 20231,755 155,098 $5,351,166 $(3,406)$1,557,368 $6,905,128 $1,135,053 
Net activity from contributions and unearned compensation— 991 — — 991 4,065 
Allocated net income (loss) for the period— — (110,169)— 20,909 (89,260)(12,527)
Distributions— — (153,800)— — (153,800)(18,301)
Conversion of redeemable partnership units— 79 2,920 — — 2,920 (2,920)
Adjustment to reflect redeemable partnership units at redemption value— — (54,663)— — (54,663)54,663 
Effective portion of interest rate contracts— — — 4,896 — 4,896 563 
Amortization of interest rate contracts— — — 1,376 144 1,520 157 
Contributions from noncontrolling interests in property partnerships— — — — 5,116 5,116 — 
Non-cash contributions from noncontrolling interests in property partnerships— — — — 17,519 17,519 — 
Distributions to noncontrolling interests in property partnerships— — — — (12,150)(12,150)— 
Equity, September 30, 20231,755 155,184 $5,036,445 $2,866 $1,588,906 $6,628,217 $1,160,753 
Equity, June 30, 20221,750 154,977 $4,716,430 $(27,077)$1,552,706 $6,242,059 $1,646,678 
Net activity from contributions and unearned compensation— 2,082 — — 2,082 6,882 
Allocated net income for the period— — 362,818 — 18,801 381,619 40,760 
Distributions— — (153,620)— — (153,620)(17,930)
Conversion of redeemable partnership units— 26 959 — — 959 (959)
Adjustment to reflect redeemable partnership units at redemption value— — 268,916 — — 268,916 (268,916)
Effective portion of interest rate contracts— — — 9,709 — 9,709 1,091 
Amortization of interest rate contracts— — — 1,377 144 1,521 156 
Distributions to noncontrolling interests in property partnerships— — — — (20,150)(20,150)— 
Equity, September 30, 20221,750 155,005 $5,197,585 $(15,991)$1,551,501 $6,733,095 $1,407,762 


BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED STATEMENTS OF CASH FLOWS
(unaudited and in thousands)
 Three months ended March 31,
 20242023
Cash flows from operating activities:
Net income$108,301 $107,490 
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization217,019 206,872 
Impairment loss13,615 — 
Amortization of right of use assets - operating leases1,441 652 
Non-cash compensation expense18,873 26,262 
(Income) loss from unconsolidated joint ventures(19,186)7,569 
Distributions of net cash flow from operations of unconsolidated joint ventures8,643 5,996 
Gains from investments in securities(2,272)(1,665)
Allowance for current expected credit losses (gains)45 
Non-cash portion of interest expense12,109 7,387 
Unrealized gain on non-real estate investment(396)(259)
Change in assets and liabilities:
Tenant and other receivables, net29,454 7,518 
Accrued rental income, net(35,945)(18,619)
Prepaid expenses and other assets(74,705)(97,762)
Right of use assets - operating lease(750)— 
Lease liabilities - operating leases(1,241)(251)
Accounts payable and accrued expenses(20,725)(8,505)
Accrued interest payable(14,171)10,626 
Other liabilities(12,846)16,565 
Tenant leasing costs(29,627)(35,911)
Total adjustments89,294 126,520 
Net cash provided by operating activities197,595 234,010 
Cash flows from investing activities:
Construction in progress(181,636)(119,682)
Building and other capital improvements(32,087)(39,100)
Tenant improvements(53,377)(67,175)
Acquisition of real estate (net of cash received upon consolidation)6,086 — 
Capital contributions to unconsolidated joint ventures(26,457)(60,745)
Investment in non-real estate investments— (733)
Issuance of note receivables (including related party)(573)— 
Investments in securities, net1,425 1,843 
Net cash used in investing activities(286,619)(285,592)
Cash flows from financing activities:
Repayments of mortgage notes payable(804)— 
Repayment / redemption of unsecured senior notes(700,000)— 
Borrowings on unsecured term loan— 1,200,000 
Payments on finance lease obligations(3,160)— 
Repayment of unsecured term loan— (730,000)
Deferred financing costs(108)(6,213)
Net activity from equity transactions(2,136)586 
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BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED STATEMENTS OF CAPITAL AND NONCONTROLLING INTERESTS
(unaudited and in thousands)
UnitsCapital
 General PartnerLimited PartnerPartners’ Capital (General and Limited Partners)Accumulated
Other
Comprehensive Loss
Noncontrolling
Interests - Property Partnerships
Total CapitalNoncontrolling Interests - Redeemable Partnership Units
Equity, December 31, 20221,750 155,008 $5,299,428 $(13,718)$1,547,317 $6,833,027 $1,280,886 
Net activity from contributions and unearned compensation76 4,913 — — 4,913 42,090 
Allocated net income for the period— — 75,590 — 59,337 134,927 8,642 
Distributions— — (461,209)— — (461,209)(55,038)
Conversion of redeemable partnership units— 100 3,714 — — 3,714 (3,714)
Adjustment to reflect redeemable partnership units at redemption value— — 114,009 — — 114,009 (114,009)
Effective portion of interest rate contracts— — — 12,461 — 12,461 1,425 
Amortization of interest rate contracts— — — 4,123 432 4,555 471 
Contributions from noncontrolling interests in property partnerships— — — — 12,671 12,671 — 
Non-cash contributions from noncontrolling interests in property partnerships— — — — 17,519 17,519 — 
Distributions to noncontrolling interests in property partnerships— — — — (48,370)(48,370)— 
Equity, September 30, 20231,755 155,184 $5,036,445 $2,866 $1,588,906 $6,628,217 $1,160,753 
Equity, December 31, 20211,746 154,799 $4,173,290 $(36,662)$1,556,553 $5,693,181 $2,078,603 
Net activity from contributions and unearned compensation31 6,967 — — 6,967 39,543 
Allocated net income for the period— — 736,374 — 54,896 791,270 82,821 
Distributions— — (460,789)— — (460,789)(53,789)
Conversion of redeemable partnership units175 6,388 — — 6,388 (6,388)
Adjustment to reflect redeemable partnership units at redemption value— — 735,355 — — 735,355 (735,355)
Effective portion of interest rate contracts— — — 16,540 — 16,540 1,860 
Amortization of interest rate contracts— — — 4,131 432 4,563 467 
Contributions from noncontrolling interests in property partnerships— — — — 849 849 — 
Distributions to noncontrolling interests in property partnerships— — — — (61,229)(61,229)— 
Equity, September 30, 20221,750 155,005 $5,197,585 $(15,991)$1,551,501 $6,733,095 $1,407,762 
BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED STATEMENTS OF CASH FLOWS
(unaudited and in thousands)
 Three months ended March 31,
 20242023
Distributions(171,794)(171,270)
Proceeds from sale of interest in property partnerships and contributions from noncontrolling interests in property partnerships141,118 7,555 
Distributions to noncontrolling interests in property partnerships(20,025)(21,606)
Net cash provided by (used in) financing activities(756,909)279,052 
Net increase (decrease) in cash and cash equivalents and cash held in escrows(845,933)227,470 
Cash and cash equivalents and cash held in escrows, beginning of period1,612,567 736,812 
Cash and cash equivalents and cash held in escrows, end of period$766,634 $964,282 
Reconciliation of cash and cash equivalents and cash held in escrows:
Cash and cash equivalents, beginning of period$1,531,477 $690,333 
Cash held in escrows, beginning of period81,090 46,479 
Cash and cash equivalents and cash held in escrows, beginning of period$1,612,567 $736,812 
Cash and cash equivalents, end of period$701,695 $918,952 
Cash held in escrows, end of period64,939 45,330 
Cash and cash equivalents and cash held in escrows, end of period$766,634 $964,282 
Supplemental disclosures:
Cash paid for interest$180,717 $125,698 
Interest capitalized$9,381 $10,589 
Non-cash investing and financing activities:
Write-off of fully depreciated real estate$(27,993)$(55,142)
Change in real estate included in accounts payable and accrued expenses$(48,518)$11,692 
Right of use assets obtained in exchange for lease liabilities - operating lease$25,637 $— 
Non-cash distributions to noncontrolling interests in property, net$52,786 $— 
Capitalized operating lease costs$7,548 $— 
Investment in unconsolidated joint ventures eliminated upon consolidation$(11,834)$— 
Mortgage notes payable recorded upon consolidation$207,093 $— 
Real estate and intangibles recorded upon consolidation$(220,015)$— 
Distributions declared but not paid$172,154 $171,427 
Conversions of redeemable partnership units to partners’ capital$1,303 $195 
Issuance of restricted securities to employees and non-employee directors$41,989 $46,516 



The accompanying notes are an integral part of these consolidated financial statements.
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BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED STATEMENTS OF CASH FLOWS
(unaudited and in thousands)
 Nine months ended September 30,
 20232022
Cash flows from operating activities:
Net income (loss)$143,569 $874,091 
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization613,446 546,271 
Amortization of right of use assets - operating leases1,502 1,843 
Non-cash compensation expense46,699 44,208 
Loss from unconsolidated joint ventures261,793 1,389 
Distributions of net cash flow from operations of unconsolidated joint ventures21,871 20,511 
Losses (gains) from investments in securities(2,311)8,549 
Allowance for current expected credit losses302 (476)
Non-cash portion of interest expense22,541 19,704 
Other income - assignment fee— (6,624)
Gains on sales of real estate(517)(385,349)
Unrealized gain on non-real estate investment(332)— 
Change in assets and liabilities:
Tenant and other receivables, net(13,467)4,133 
Note receivable, net— (152)
Accrued rental income, net(72,190)(76,268)
Prepaid expenses and other assets(76,621)(46,104)
Right of use assets - operating lease(25,640)— 
Lease liabilities - operating leases282 447 
Accounts payable and accrued expenses40,914 3,167 
Accrued interest payable24,648 (2,900)
Other liabilities(6,254)(35,490)
Tenant leasing costs(65,863)(58,547)
Total adjustments770,803 38,312 
Net cash provided by operating activities914,372 912,403 
Cash flows from investing activities:
Acquisitions of real estate— (1,320,273)
Construction in progress(361,625)(384,083)
Building and other capital improvements(117,393)(112,755)
Tenant improvements(244,841)(139,986)
Proceeds from sales of real estate517 695,231 
Proceeds from assignment fee— 6,624 
Capital contributions to unconsolidated joint ventures(148,875)(109,643)
Capital distributions from unconsolidated joint ventures7,350 36,622 
Investment in non-real estate investments(1,990)— 
Issuance of related party note receivable(10,500)— 
Proceeds from notes receivable— 10,000 
Investments in securities, net1,779 5,043 
Net cash used in investing activities(875,578)(1,313,220)
Cash flows from financing activities:
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BOSTON PROPERTIES LIMITED PARTNERSHIP
CONSOLIDATED STATEMENTS OF CASH FLOWS
(unaudited and in thousands)
 Nine months ended September 30,
 20232022
Proceeds from unsecured senior notes747,727 — 
Repayment / redemption of unsecured senior notes(500,000)— 
Borrowings on unsecured line of credit— 885,000 
Repayments of unsecured line of credit— (690,000)
Borrowings on unsecured term loan1,200,000 730,000 
Repayment of unsecured term loan(730,000)— 
Deferred financing costs(12,639)(2,230)
Net activity from equity transactions367 (359)
Distributions(514,974)(513,486)
Contributions from noncontrolling interests in property partnerships12,671 849 
Distributions to noncontrolling interests in property partnerships(48,370)(61,229)
Net cash provided by financing activities154,782 348,545 
Net increase (decrease) in cash and cash equivalents and cash held in escrows193,576 (52,272)
Cash and cash equivalents and cash held in escrows, beginning of period736,812 501,158 
Cash and cash equivalents and cash held in escrows, end of period$930,388 $448,886 
Reconciliation of cash and cash equivalents and cash held in escrows:
Cash and cash equivalents, beginning of period$690,333 $452,692 
Cash held in escrows, beginning of period46,479 48,466 
Cash and cash equivalents and cash held in escrows, beginning of period$736,812 $501,158 
Cash and cash equivalents, end of period$882,647 $375,774 
Cash held in escrows, end of period47,741 73,112 
Cash and cash equivalents and cash held in escrows, end of period$930,388 $448,886 
Supplemental disclosures:
Cash paid for interest$404,016 $339,067 
Interest capitalized$33,426 $40,048 
Non-cash investing and financing activities:
Write-off of fully depreciated real estate$(109,905)$(95,996)
Change in real estate included in accounts payable and accrued expenses$29,435 $29,290 
Right of use assets obtained in exchange for lease liabilities$134,509 $— 
Non-cash contributions from noncontrolling interests in property partnerships$17,519 $— 
Capitalized operating lease costs$5,031 $— 
Construction in progress from prepaid expenses and other assets$25,577 $— 
Construction in progress, net deconsolidated$— $(11,316)
Investment in unconsolidated joint ventures recorded upon deconsolidation$— $11,316 
Distributions declared but not paid$171,916 $170,952 
Conversions of redeemable partnership units to partners’ capital$3,714 $6,388 
Issuance of restricted securities to employees and non-employee directors$48,121 $48,605 
The accompanying notes are an integral part of these consolidated financial statements.
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Table of Contents
BOSTON PROPERTIES, INC. AND BOSTON PROPERTIES LIMITED PARTNERSHIP
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS
1. Organization
BXP is a fully integrated, self-administered and self-managed REIT. BXP is the sole general partner of BPLP, its operating partnership, and at September 30, 2023March 31, 2024, owned an approximate 89.4% (89.6%89.1% (89.4% at December 31, 2022)2023) general and limited partnership interest in BPLP. Unless stated otherwise or the context requires, the “Company” refers to BXP and its subsidiaries, including BPLP and its consolidated subsidiaries. Partnership interests in BPLP include:
common units of partnership interest (also referred to as “OP Units”) and
long term incentive units of partnership interest (also referred to as “LTIP Units”)
Unless specifically noted otherwise, all references to OP Units exclude units held by BXP. A holder of an OP Unit may present the OP Unit to BPLP for redemption at any time (subject to restrictions agreed upon at the time of issuance of OP Units to particular holders that may restrict such redemption right for a period of time, generally one year from issuance). Upon presentation of an OP Unit for redemption, BPLP is obligated to redeem the OP Unit for cash equal to the value of a share of common stock of BXP (“Common Stock”). In lieu of such cash redemption, BXP may elect to acquire the OP Unit for one share of Common Stock. Because the number of shares of Common Stock outstanding at all times equals the number of OP Units that BXP owns, one share of Common Stock is generally the economic equivalent of one OP Unit, and the quarterly distribution that may be paid to the holder of an OP Unit equals the quarterly dividend that may be paid to the holder of a share of Common Stock.
The Company uses LTIP Units as a form of time-based, restricted equity compensation and as a form of performance-based equity compensation for employees, and has previously granted LTIP Units in the form of (1) 2012 outperformance plan awards (“2012 OPP Units”) and (2) 2013 - 20232024 multi-year, long-term incentive program awards (also referred to as “MYLTIP Units”), each of which, upon the satisfaction of certain performance-based and time-based vesting conditions, is convertible into one OP Unit. The three-year measurement periods for the 2012 OPP Units and the 2013 - 20202021 MYLTIP Units have ended and BXP’s total stockholder return (“TSR”) was sufficient for employees to earn and therefore become eligible to vest in a portion of the awards. Unless and until they are earned, the rights, preferences and privileges of the 20212022 - 20232024 MYLTIP Units differ from other LTIP Units granted to employees (including the 2012 OPP Units and the 2013 - 20202021 MYLTIP Units, which have been earned). Therefore, unless specifically noted otherwise, all references to LTIP Units exclude the 20212022 - 20232024 MYLTIP Units. LTIP Units (including the earned 2012 OPP Units and the earned 2013 - 20202021 MYLTIP Units), whether vested or not, will receive the same quarterly per unit distributions as OP Units, which equal per share dividends on Common Stock (See Notes 9 and 13).
Properties
At September 30, 2023,March 31, 2024, the Company owned or had joint venture interests in a portfolio of 190187 commercial real estate properties (the “Properties”) aggregating approximately 53.5 million net rentable square feet of primarily premier workplaces, including 11 properties under construction/redevelopment totaling approximately 2.83.2 million net rentable square feet. At September 30, 2023,March 31, 2024, the Properties consisted of:
169165 office and life sciences properties (including 8seven properties under construction/redevelopment);
14 retail properties (including two properties under construction/redevelopment);
sixseven residential properties (including one propertytwo properties under construction); and
one hotel.
The Company considers premier workplaces to be well-located buildings that are modern structures or have been modernized to compete with newer buildings and professionally managed and maintained. As such, these properties attract high-quality clientstenants and command upper-tier rental rates.
2. Summary of Significant Accounting Policies
BXP does not have any other significant assets, liabilities or operations, other than its investment in BPLP, nor does it have employees of its own. BPLP, not BXP, generally executes all significant business relationships other than transactions involving securities of BXP. All majority-owned subsidiaries and joint ventures over which the Company has financial and operating control and variable interest entities (“VIEs”) in which the Company has determined it is the primary beneficiary are included in the consolidated financial statements. All significant
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intercompany balances and transactions have been eliminated in consolidation. The Company accounts for all other unconsolidated joint ventures using the equity method of accounting. Accordingly, the Company’s share of the earnings of these joint ventures and companies is included in consolidated net income.
The accompanying interim financial statements are unaudited; however, the financial statements have been prepared in accordance with generally accepted accounting principles (“GAAP”) for interim financial information and in conjunction with the rules and regulations of the Securities and Exchange Commission (the “SEC”). Accordingly, they do not include all of the disclosures required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting solely of normal recurring matters) necessary for a fair statement of the financial statements for these interim periods have been included. The results of operations for the interim periods are not necessarily indicative of the results to be obtained for other interim periods or for the full fiscal year. The year-end consolidated balance sheet data was derived from audited financial statements, but does not include all disclosure required by GAAP.  These financial statements should be read in conjunction with the Company’s financial statements and notes thereto contained in the Company’s Annual Report in the Company’s Form 10-K for its fiscal year ended December 31, 2022.2023.
The Company bases its estimates on historical experience and on various other assumptions that it considers to be reasonable under the circumstances, including the impact of extraordinary events such as a pandemic, the results of which form the basis for making significant judgments about the carrying values of assets and liabilities, assessments of future collectability, and other areas of the financial statements that are impacted by the use of estimates. Actual results may differ from these estimates under different assumptions or conditions.
Variable Interest Entities (VIEs)
Consolidated VIEs are those for which the Company is considered to be the primary beneficiary of a VIE. The primary beneficiary is the entity that has a controlling financial interest in the VIE, which is defined by the entity having both of the following characteristics: (1) the power to direct the activities that, when taken together, most significantly impact the VIE’s performance and (2) the obligation to absorb losses or the right to receive the returns from the VIE that could potentially be significant to the VIE. The assets of each VIE are only available to satisfy such VIE's respective liabilities. The Company has identified eightnine entities that are VIEs as of September 30, 2023March 31, 2024 and has determined that it is the primary beneficiary for sevenall of the eightthese entities that are VIEs as of September 30, 2023.March 31, 2024.
Consolidated Variable Interest Entities
As of September 30, 2023,March 31, 2024, BXP has identified sevennine consolidated VIEs, including BPLP. Excluding BPLP, the consolidated VIEs consisted of (i) the following five in-service properties: 767 Fifth Avenue (the General Motors Building), Times Square Tower, 601 Lexington Avenue, Atlantic Wharf Office Building and 100 Federal Street, (ii) 343 Madison Avenue, which is categorized as land held for future development.development and (iii) 290 Binney Street and 300 Binney Street which are currently under development / redevelopment.
The Company consolidates these VIEs because it is the primary beneficiary.  The third parties’ interests in these consolidated entities (excluding BPLP’s interest) are reflected as noncontrolling interests in property partnerships in the accompanying consolidated financial statements (See Note 9).
In addition, BXP’s only significant asset is its investment in BPLP and, consequently, substantially all of BXP’s assets and liabilities are the assets and liabilities of BPLP.
Variable Interest Entities Not Consolidated
The Company has determined BP/CRF Metropolitan Square LLC is a VIE. The Company does not consolidate this entity asAs of March 31, 2024, the Company does not have the power to direct the activitiesany unconsolidated joint ventures that when taken together, most significantly impact the VIE’s performance and, therefore the Company is not considered to be the primary beneficiary.are classified as VIEs.
Fair Value Measurements
The Company follows the authoritative guidance for fair value measurements.
measurements when valuing its financial instruments for disclosure purposes. The table below presents for September 30, 2023March 31, 2024 and December 31, 2022,2023, the financial instruments that are being valued for disclosure purposes as well as the Level at which they are categorized (asas defined in Accounting Standards Codification (“ASC”) 820 “Fair Value Measurements and Disclosures” (“ASC 820”).
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Financial InstrumentLevel
3-Month United States Treasury BillsLevel 1
Investment in securitiesLevel 1
Unsecured senior notes (1)Level 1
Related party note receivableLevel 3
Notes receivableLevel 3
Sales-type lease receivableLevel 3
Mortgage notes payableLevel 3
Unsecured line of creditLevel 3
Unsecured term loanLevel 3
_______________
(1)If trading volume for the period is low, the valuation could be categorized as Level 2.
Because the Company’s valuations of its financial instruments are based on the above Levels and involve the use of estimates, the actual fair values of its financial instruments may differ materially from those estimates.
In addition, the Company’s estimated fair values for these instruments as of the end of the applicable reporting period are not projections of, nor necessarily indicative of, estimated or actual fair values in future reporting periods.
At December 31, 2023, the Company had outstanding three-month United States Treasury Bills with a maturity date of January 30, 2024 that were classified as held to maturity because the Company determined that it had the positive intent and ability to hold to maturity. Because these securities were considered a short-term investment, they are reflected at amortized cost within Cash and Cash Equivalents on the Consolidated Balance Sheets. At December 31, 2023, the amortized cost of these securities was approximately $302.7 million. There were no such securities outstanding at March 31, 2024.
The Company’s investment in non-real estate investments is shown within Prepaid and Other Assets on the Consolidated Balance Sheets and was approximately $5.1 million and $4.6 million at March 31, 2024 and December 31, 2023, respectively. The non-real estate investments utilize net asset value as the practical expedient.
Non-Recurring Fair Value
The following table presents the aggregate carrying value of the Company’s related party note receivable, net, sales-type lease receivable, net, mortgage notes payable, net, unsecured senior notes, net, unsecured line of credit and unsecured term loan, netnon-recurring fair value financial
instruments and the Company’s corresponding estimate of fair value as of September 30, 2023March 31, 2024 and December 31, 20222023 (in thousands):
September 30, 2023December 31, 2022 March 31, 2024December 31, 2023
Carrying
Amount
Estimated
Fair Value
Carrying
Amount
Estimated
Fair Value
Carrying
Amount
Estimated
Fair Value
Carrying
Amount
Estimated
Fair Value
3-Month United States Treasury Bills (1)
Related party note receivable, netRelated party note receivable, net$88,807 $90,348 $78,576 $79,220 
Related party note receivable, net
Related party note receivable, net
Note receivable, net
Sales-type lease receivable, netSales-type lease receivable, net13,475 13,257 12,811 13,045 
TotalTotal$102,282 $103,605 $91,387 $92,265 
Mortgage notes payable, net
Mortgage notes payable, net
Mortgage notes payable, netMortgage notes payable, net$3,275,974 $2,658,844 $3,272,368 $2,744,479 
Unsecured senior notes, netUnsecured senior notes, net10,488,568 9,163,931 10,237,968 9,135,512 
Unsecured line of creditUnsecured line of credit— — — — 
Unsecured term loan, netUnsecured term loan, net1,197,173 1,195,007 730,000 730,000 
TotalTotal$14,961,715 $13,017,782 $14,240,336 $12,609,991 
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_______________
(1) Per the guidance in ASC 326 “Financial Instruments — Credit Losses” (“ASC 326”), the Company concluded that the risk of nonpayment is nonexistent because the U.S. Government has a long history with no credit losses and therefore, no credit loss allowance was recorded.

At March 31, 2024, the Company evaluated the expected hold period for a portion of its Shady Grove property located in Rockville, Maryland. Based on a shorter-than-expected hold period, the Company reduced the carrying value of a portion of the property that the Company anticipates selling to a third party developer to its estimated fair value at March 31, 2024. As a result, each of BXP and BPLP recognized an impairment loss of approximately $13.6 million. The Company’s estimated fair value utilized Level 3 inputs and was based on a pending offer from a third party.
Recurring Fair Value
Derivatives
In addition to the financial instruments noted above, the Company uses interest rate swap agreements to manage its interest rate risk (See Note 7). The valuation of these instruments is determined using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves. To comply with the provisions of ASC 820, the Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. Although the Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by the Company and its counterparties. However, as of September 30, 2023, theThe Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments arewere not significant to the overall valuation of its derivatives. As a result, the Company has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.
The following table presents the aggregate fair value of the Company’s interest rate swaps as of September 30, 2023March 31, 2024 and December 31, 20222023 (in thousands):
Fair valueSeptember 30, 2023December 31, 2022
Interest rate swaps$5,457 $— 
Fair valueMarch 31, 2024December 31, 2023
Interest rate swaps$12,298 $1,976 
Investments
The Company accounts for investments in equity securities at fair value, with gains or losses resulting from changes in fair value recognized currently in earnings. The Company maintains deferred compensation plans that are designed to allow officers and non-employee directors of BXP to defer a portion of the officer’s current income or the non-employee director’s current compensation on a pre-tax basis and receive a tax-deferred return on these deferrals based on the performance of specific investments selected by the officer or non-employee director. The Company’s obligation under the plans is that of an unsecured promise to pay the deferred compensation to the plan participants in the future. At March 31, 2024 and December 31, 2023, the Company had maintained approximately $37.0 million and $36.1 million, respectively, in separate accounts, which are not restricted as to their use. The Company recognized gains of approximately $2.3 million and $1.7 million on its investments in the accounts associated with the Company’s deferred compensation plans during the three months ended March 31, 2024 and March 31, 2023, respectively primarily due to the observable change in fair value.
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Newly Issued Accounting Pronouncements
Business Combinations - Joint Venture Formations
In August 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-05, “Business Combinations - Joint Venture Formations (Subtopic 805-60)” (“ASU 2023-05”). ASU 2023-05 is intended to (1) address accounting for contributions made to a joint venture upon formation and (2) reduce diversity in practice. ASU 2023-05 is effective for all joint ventures formed on or after January 1, 2025, with early adoption permitted. The Company is currently assessing the potential impact that the adoption of ASU 2023-05 will have on the Company's consolidated financial statements.
3. Real Estate
BXP
Real estate consisted of the following at September 30, 2023March 31, 2024 and December 31, 20222023 (in thousands):
September 30, 2023December 31, 2022
March 31, 2024March 31, 2024December 31, 2023
LandLand$5,200,195 $5,189,811 
Right of use assets - finance leasesRight of use assets - finance leases237,532 237,510 
Right of use assets - operating leases (1)Right of use assets - operating leases (1)322,790 167,351 
Land held for future development (2)Land held for future development (2)670,691 721,501 
Buildings and improvementsBuildings and improvements16,112,969 15,820,724 
Tenant improvementsTenant improvements3,442,669 3,200,743 
Furniture, fixtures and equipmentFurniture, fixtures and equipment53,536 50,310 
Construction in progressConstruction in progress551,330 406,574 
TotalTotal26,591,712 25,794,524 
Less: Accumulated depreciationLess: Accumulated depreciation(6,723,616)(6,298,082)
$19,868,096 $19,496,442 
$
_______________
(1)See Note 4.
(2)Includes pre-development costs.
BPLP
Real estate consisted of the following at September 30, 2023March 31, 2024 and December 31, 20222023 (in thousands):
September 30, 2023December 31, 2022
March 31, 2024March 31, 2024December 31, 2023
LandLand$5,105,486 $5,095,102 
Right of use assets - finance leasesRight of use assets - finance leases237,532 237,510 
Right of use assets - operating leases (1)Right of use assets - operating leases (1)322,790 167,351 
Land held for future development (2)Land held for future development (2)670,691 721,501 
Buildings and improvementsBuildings and improvements15,841,413 15,547,919 
Tenant improvementsTenant improvements3,442,669 3,200,743 
Furniture, fixtures and equipmentFurniture, fixtures and equipment53,536 50,310 
Construction in progressConstruction in progress551,330 406,574 
TotalTotal26,225,447 25,427,010 
Less: Accumulated depreciationLess: Accumulated depreciation(6,601,957)(6,180,474)
$19,623,490 $19,246,536 
$
_______________
(1)See Note 4.
(2)Includes pre-development costs.
Acquisition
On January 8, 2024, the Company completed the acquisition of its joint venture partner’s 50% economic ownership interest in the joint venture that owns 901 New York Avenue, located in Washington, DC. At acquisition, the total net equity acquired was $20.0 million, which includes $10.0 million in cash that the Company paid for the joint venture partner's 50% economic ownership interest in the joint venture. The property is subject to existing mortgage indebtedness of approximately $207.1 million (See Note 6). The acquisition resulted in the Company recording a gain upon consolidation of approximately $21.8 million, which is the difference between the fair value of the previously held equity method investment immediately prior to the consolidation of $10.0 million, less the Company’s costs basis of approximately $(11.8) million. The gain on consolidation is included within income (loss) from unconsolidated joint ventures in the Consolidated Statement of Operations.
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The total net assets acquired is equal to (1) the total net equity acquired of $20.0 million, which includes $10.0 million in cash that the Company paid for the joint venture partner's 50% economic ownership interest in the joint venture. plus (2) $207.1 million of debt assumed, less (3) net working capital acquired of approximately $7.1 million. The following table summarizes the allocation of the fair value of the net assets the Company received at the date of acquisition for 901 New York Avenue (in thousands):
Land and site improvements$65,808 
Building and improvements56,882 
Tenant improvements16,088 
In-place lease intangibles72,621 
Above-market lease intangibles2,757 
Below-market lease intangibles(2,515)
Mortgage note payable adjustment8,374 
Net assets acquired$220,015 
The following table summarizes the estimated annual amortization of the acquired in-place lease intangibles, and the acquired above- and below-market lease intangibles for 901 New York Avenue for the remainder of 2024 and each of the next five succeeding fiscal years (in thousands):
Acquired In-Place Lease IntangiblesAcquired Above-Market Lease IntangiblesAcquired Below-Market Lease Intangibles
Period from January 8, 2024 through December 31, 2024$10,364 $607 $252 
20259,030 454 257 
20266,494 238 257 
20276,265 201 257 
20286,069 186 257 
20296,076 186 251 
The following table summarizes the weighted-average useful life of the acquired in-place lease intangibles and the acquired above- and below-market lease intangibles for 901 New York Avenue as of the acquisition date (in years):
Acquired In-Place Lease IntangiblesAcquired Above-Market Lease IntangiblesAcquired Below-Market Lease Intangibles
Weighted-average useful life6.74.09.8
901 New York Avenue contributed approximately $7.9 million of revenue and $2.3 million of net loss to the Company for the period from January 8, 2024 through March 31, 2024. 901 New York Avenue is a premier workplace consisting of approximately 524,000 net rentable square feet.
Development
On February 12, 2024, the Company commenced the development of a residential project at 121 Broadway Street in Cambridge, Massachusetts that is adjacent to its development projects at 290 Binney Street and 300 Binney Street. 121 Broadway will consist of 439 residential units aggregating approximately 492,000 net rentable square feet.
Impairment
At March 31, 2024, the Company evaluated the expected hold period for a portion of its Shady Grove property located in Rockville, Maryland. Based on a shorter-than-expected hold period, the Company reduced the carrying value of a portion of the property that the Company anticipates selling to a third party developer to its estimated fair value at March 31, 2024. As a result, each of BXP and BPLP recognized an impairment loss of approximately
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Developments/Redevelopments
On January 5, 2023, the Company commenced the development of 290 Binney Street, an approximately 566,000 net rentable square foot laboratory/life sciences project$13.6 million. The Company’s estimated fair value was based on Level 3 inputs as defined in Cambridge, Massachusetts. Concurrent with the commencement of this project, the Kendall Center Blue Parking Garage was taken out of serviceASC 820 and demolished to support the development of this project. 290 Binney Street is 100% pre-leased to AstraZeneca. There can be no assurance that the Company will complete development of the project on the terms and schedule currently contemplated or at all.
On January 30, 2023, the Company commenced the redevelopment of 300 Binney Street at Kendall Center in Cambridge, Massachusetts. 300 Binney Street consisted of an approximately 195,000 net rentable square foot premier workplace that is being redeveloped into approximately 236,000 net rentable square feet of laboratory/life sciences space. BXP and BPLP recognized approximately $11.0 million of depreciation expense during the nine months ended September 30, 2023 associated with the acceleration of depreciation on the assets being removeda pending offer from service and demolished as part of the redevelopment of the property. The project is 100% pre-leased to the Broad Institute.
On April 29, 2023, the Company completed and fully placed in-service 2100 Pennsylvania Avenue, a premier workplace project with approximately 476,000 net rentable square feet located in Washington, DC.
On June 1, 2023, the Company completed and fully placed in-service its View Boston observatory at The Prudential Center, a redevelopment of the top three floors of 800 Boylston Street - The Prudential Center, located in Boston, Massachusetts. View Boston observatory at The Prudential Center consists of approximately 63,000 net rentable square feet of retail, including food and beverage, and observation space.
On July 20, 2023, the Company completed and fully placed in-service 140 Kendrick Street - Building A, a premier workplace redevelopment project with approximately 104,000 net rentable square feet located in Needham, Massachusetts. The property is the first Net Zero, Carbon Neutral office repositioning of its scale in Massachusetts.
On September 26, 2023, the Company partially placed in-service 180 CityPoint, an approximately 329,000 net rentable square feet laboratory/life sciences project located in Waltham, Massachusetts.third party.
4. Leases
The Company estimates the collectability of its accrued rent and accounts receivable balances related to lease revenue. When evaluating the collectability of these accrued rent and accounts receivable balances, management considers tenant creditworthiness, current economic trends, and changes in tenants’ payment patterns, on a lease-by-lease basis. If the Company determines that the accrued rent and/or accounts receivable balances are no longer probable of collection then the balances are written-off and the lease is recognized on a cash basis.
If applicable, information related to write-offs of accrued rent, net balances and accounts receivable, net balances and reinstatements of accrued rent balances for the Company’s unconsolidated joint ventures can be found in Note 5.
Lessor
The following table summarizes the components of lease revenue recognized under the Company’s operating and sales-type leases for the three and nine months ended September 30,March 31, 2024 and 2023 and 2022 and included within the Company's Consolidated Statements of Operations (in thousands):
Three months ended September 30,Nine months ended September 30,
Lease Revenue2023202220232022
Fixed contractual payments$626,738 $610,878 $1,877,573 $1,811,836 
Variable lease payments140,210 128,377 407,528 367,438 
Sales-type lease revenue233 — 688 — 
$767,181 $739,255 $2,285,789 $2,179,274 
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Three months ended March 31,
Lease Revenue20242023
Fixed contractual payments$648,890 $621,646 
Variable lease payments139,458 135,003 
Sales-type lease revenue242 226 
$788,590 $756,875 
Lessee
On August 1, 2023, a consolidated joint venture in whichMarch 28, 2024, the Company hasentered into a 55% interest executed an up to 99-year ground90-year air rights lease with the MetropolitanMassachusetts Department of Transportation Authority for an approximately 25,00061,000 square footfeet site at the 343 Madison Avenue project in New York City (see Note 9). The 343 Madison Avenue project contemplatesparking garage located at 100 Clarendon Street and the constructionconcourse level of (1) a direct entrance to the Long Island Railroad’s new east side access project (Grand Central Madison) (“Phase 1”) and (2) an approximately 900,000 square foot premier workplace building with ground floor retail (“Phase 2”Massachusetts Bay Transportation Authority’s Back Bay Station (the “Station”). The joint venture haslease requires annual base rental payments of $250,000 until the option until July 31, 2025 to terminatecommencement of construction, as defined in the ground lease prior tolease. If the Company commences construction of a project on the new building and receive reimbursement of up to $117.0 million forsite on or before August 1, 2028, then a final fixed rental payment is due in accordance with the cost oflease at that time. After August 1, 2028, if the Company commences construction of Phase 1.a project on the site, then a final rental payment based on the then current fair market value will be due at that time. In addition, the lease requires annual payments of $500,000 through 2033 to fund maintenance and improvements to the Station. The Company is reasonably certainhas assumed that it will not exercise this termination option as the Company completed a long-term competitive process to obtain the right to ground lease this site. There can be no assurance that Phase 1 will be completedbegin construction on the terms currently contemplatedsite on or that Phase 2 of the development project will commence on the terms currently contemplated or at all.
There is no rent due under the ground lease for the period frombefore August 1, 2023 through July 31, 2028, with the exception of a payment of approximately $21.8 million that is due on July 31, 2025. Beginning August 1, 2028, the lease requires rent of approximately $10.9 million per year with adjustments every five years, with a minimum increase of 110% of the ground rent from the prior year.2028. The incremental borrowing rate for this lease is 8.41%6.57% per annum. The net present value of the ground lease payments is approximately $134.5$23.2 million. The lease required the joint venture to pay a non-refundable deposit totaling $25.0 million, of which $15.0 million was placed in escrow in 2022 with the signing of a pre-lease agreement and $10.0 million was paid in 2023 as a requirement of entering into the ground lease. The consolidated joint ventureCompany classifies this ground lease as an operating lease. As a result, the consolidated joint ventureCompany recorded a Right of Use Assets – Operating Leases and Lease Liabilities – Operating Leases of approximately $160.1$23.9 million and $134.5$23.2 million, respectively, on its Consolidated Balance Sheets. The 343 Madison Avenue ground lease had operatingSheets as of March 31, 2024. There were no lease costs of approximately $5.0 million and $5.0 million for the three and nine months ended September 30, 2023, respectively. period from March 28, 2024 through March 31, 2024.
The following table provides a maturity analysis for the 343 Madison Avenueair rights operating lease as of August 1, 2023March 28,
2024 (in thousands):
Operating
Period from August 1, 2023 through December 31, 2023$— 
2024— 
OperatingOperating
Period from March 28, 2024 through December 31, 2024
2025202521,795 
20262026— 
20272027— 
202820284,541 
2029
ThereafterThereafter3,027,718 
Total lease paymentsTotal lease payments3,054,054 
Less: Interest portionLess: Interest portion(2,919,545)
Present value of lease paymentsPresent value of lease payments$134,509 
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5. Investments in Unconsolidated Joint Ventures
The investments in unconsolidated joint ventures consist of the following at September 30, 2023March 31, 2024 and December 31, 2022:2023:
 Carrying Value of Investment (1) Carrying Value of Investment (1)
EntityEntityPropertiesNominal % OwnershipSeptember 30, 2023December 31, 2022EntityPropertiesNominal % OwnershipMarch 31, 2024December 31, 2023
(in thousands)
(in thousands)(in thousands)
Square 407 Limited PartnershipSquare 407 Limited PartnershipMarket Square North50.00 %$(6,020)$(6,198)
BP/CRF Metropolitan Square LLCMetropolitan Square20.00 %(2)— (37,629)
901 New York, LLC901 New York, LLC901 New York Avenue25.00 %(3)(11,944)(12,493)
WP Project Developer LLCWP Project Developer LLCWisconsin Place Land and Infrastructure33.33 %(4)30,890 31,971 
500 North Capitol Venture LLC500 North Capitol Venture LLC500 North Capitol Street, NW30.00 %(9,815)(9,185)
501 K Street LLC501 K Street LLC1001 6th Street50.00 %44,506 42,922 
Podium Developer LLCPodium Developer LLCThe Hub on Causeway - Podium50.00 %46,811 46,839 
Residential Tower Developer LLCResidential Tower Developer LLCHub50House50.00 %45,413 45,414 
Hotel Tower Developer LLCHotel Tower Developer LLCThe Hub on Causeway - Hotel Air Rights50.00 %12,033 12,366 
Office Tower Developer LLCOffice Tower Developer LLC100 Causeway Street50.00 %58,174 59,716 
1265 Main Office JV LLC1265 Main Office JV LLC1265 Main Street50.00 %3,564 3,465 
BNY Tower Holdings LLCBNY Tower Holdings LLCDock 7250.00 %(5)(12,195)(19,921)
CA-Colorado Center, LLCCA-Colorado Center, LLCColorado Center50.00 %237,286 233,862 
CA-Colorado Center, LLC
CA-Colorado Center, LLC
7750 Wisconsin Avenue LLC7750 Wisconsin Avenue LLC7750 Wisconsin Avenue50.00 %50,442 52,152 
BP-M 3HB Venture LLCBP-M 3HB Venture LLC3 Hudson Boulevard25.00 %115,142 116,397 
SMBP Venture LPSanta Monica Business Park55.00 %158,561 164,735 
Platform 16 Holdings LPPlatform 16 Holdings LPPlatform 1655.00 %(6)(7)35,719 158,109 
Gateway Portfolio Holdings LLCGateway Portfolio Holdings LLCGateway Commons50.00 %362,995 324,038 
Rosecrans-Sepulveda Partners 4, LLCRosecrans-Sepulveda Partners 4, LLCBeach Cities Media Campus50.00 %27,021 27,000 
Safeco Plaza REIT LLCSafeco Plaza REIT LLCSafeco Plaza33.67 %(7)(8)42,330 69,785 
360 PAS Holdco LLC360 PAS Holdco LLC360 Park Avenue South42.21 %(7)(9)59,979 114,992 
PR II/BXP Reston Gateway LLCPR II/BXP Reston Gateway LLCSkymark - Reston Next Residential20.00 %14,551 11,351 
751 Gateway Holdings LLC751 Gateway Holdings LLC751 Gateway49.00 %90,733 80,714 
200 Fifth Avenue JV LLC200 Fifth Avenue JV LLC200 Fifth Avenue26.69 %(7)83,244 120,083 
ABXP Worldgate Investments LLCABXP Worldgate Investments LLC13100 and 13150 Worldgate Drive50.00 %17,428 N/A
$1,496,848 $1,630,485 
$
 _______________
(1)Investments with deficit balances aggregating approximately $40.0$29.4 million and $85.4$39.9 million at September 30, 2023March 31, 2024 and December 31, 2022,2023, respectively, are included within Other Liabilities in the Company’s Consolidated Balance Sheets.
(2)This entity is a VIE as of September 30, 2023 (See Note 2). During the three months ended September 30, 2023, the Company completed a restructuring of its ownership in Metropolitan Square, as described below in this Note 5 and Note 14.
(3)The Company’s economic ownership has increased based on the achievement of certain return thresholds. At September 30, 2023 and December 31, 2022,2023, the Company’s economic ownership was approximately 50%. On January 8, 2024, the Company completed the acquisition of its joint venture partner’s 50% economic ownership interest for a gross purchase price of $10.0 million, as described in Note 3 and this Note 5.
(4)(3)The Company’s wholly-owned subsidiary that owns Wisconsin Place Office also owns a 33.33% interest in the joint venture entity that owns the land, parking garage and infrastructure of the project.
(5)(4)This property includes net equity balances from the amenity joint venture.
(6)At December 31, 2022, this entity was a VIE.
(7)During the three months ended September 30, 2023, the Company recognized an other-than-temporary impairment loss on its investment.
(8)(5)The Company’s ownership includes (1) a 33.0% direct interest in the joint venture, and (2) an additional 1% interest in each of the two entities through which each partner owns its interest in the joint venture.
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(9)(6)The Company’s ownership includes (1) a 35.79% direct interest in the joint venture, (2) an additional 5.837%35.02% indirect ownership in the joint venture, and (3) an additional 1% interest in each of the two entitiesentity through which eachthe partner owns its interest in the joint venture. The Company’s partners will fund required capital until their aggregate investment is approximately 58% of all capital contributions; thereafter, the partners will fund required capital according to their percentage interests.
Certain of the Company’s unconsolidated joint venture agreements include provisions whereby, at certain specified times, each partner has the right to initiate a purchase or sale of its interest in the joint ventures. Under certain of the Company’s joint venture agreements, if certain return thresholds are achieved, the partners or the Company will be entitled to an additional promoted interest or payments.
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The combined summarized balance sheets of the Company’s unconsolidated joint ventures are as follows: 
September 30, 2023December 31, 2022
March 31, 2024March 31, 2024December 31, 2023
(in thousands) (in thousands)
ASSETSASSETS
Real estate and development in process, net (1)Real estate and development in process, net (1)$6,852,171 $6,537,554 
Other assets812,748 756,786 
Real estate and development in process, net (1)
Real estate and development in process, net (1)
Other assets (2)
Total assetsTotal assets$7,664,919 $7,294,340 
LIABILITIES AND MEMBERS’/PARTNERS’ EQUITYLIABILITIES AND MEMBERS’/PARTNERS’ EQUITY
Mortgage and notes payable, netMortgage and notes payable, net$4,048,987 $4,022,746 
Other liabilities (2)782,238 716,271 
Mortgage and notes payable, net
Mortgage and notes payable, net
Other liabilities (3)
Members’/Partners’ equityMembers’/Partners’ equity2,833,694 2,555,323 
Total liabilities and members’/partners’ equityTotal liabilities and members’/partners’ equity$7,664,919 $7,294,340 
Company’s share of equityCompany’s share of equity$1,331,257 $1,238,929 
Basis differentials (3)165,591 391,556 
Carrying value of the Company’s investments in unconsolidated joint ventures (4)$1,496,848 $1,630,485 
Basis differentials (4)
Carrying value of the Company’s investments in unconsolidated joint ventures (5)
_______________
(1)At September 30, 2023March 31, 2024 and December 31, 2022, this amount included right of use assets - finance leases totaling approximately $248.9 million. At September 30, 2023, and December 31, 2022, this amount included right of use assets - operating leases totaling approximately $20.3$19.8 million and $21.2$20.1 million, respectively.
(2)At September 30, 2023March 31, 2024 and December 31, 2022,2023, this amount included sales-type lease liabilities - finance leasesreceivable, net totaling approximately $378.4$14.0 million and $382.2$13.9 million, respectively.
(3)At September 30, 2023March 31, 2024 and December 31, 2022,2023, this amount included lease liabilities - operating leases totaling approximately $30.5 million.
(3)(4)This amount represents the aggregate difference between the Company’s historical cost basis and the basis reflected at the joint venture level, which is typically amortized over the life of the related assets and liabilities. Basis differentials result from impairments of investments, acquisitions through joint ventures with no change in control and upon the transfer of assets that were previously owned by the Company into a joint venture. During the three months ended September 30, 2023, the Company recognized an other-than-temporary impairment loss on its investments in Platform 16, 360 Park Avenue South, 200 Fifth Avenue and Safeco Plaza of approximately $155.2 million, $54.0 million, $33.4 million and $29.9 million, respectively, as well as a $35.8 million gain on investment related to Metropolitan Square, as described below in this Note 5. In addition, certain acquisition, transaction and other costs may not be reflected in the net assets at the joint venture level. The majority of the Company’s basis differences are as follows:
September 30, 2023December 31, 2022
March 31, 2024March 31, 2024December 31, 2023
PropertyProperty(in thousands)Property(in thousands)
Colorado CenterColorado Center$299,637 $301,820 
200 Fifth Avenue200 Fifth Avenue60,874 94,497 
Gateway CommonsGateway Commons48,199 47,808 
Metropolitan Square37,053 1,320 
Safeco PlazaSafeco Plaza(29,962)(15)
360 Park Avenue South360 Park Avenue South(47,147)3,798 
Dock 72Dock 72(96,366)(98,980)
Platform 16Platform 16(143,803)7,108 
These basis differentials (excluding land) will be amortized over the remaining lives of the related assets and liabilities.
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(4)(5)Investments with deficit balances aggregating approximately $40.0$29.4 million and $85.4$39.9 million at September 30, 2023March 31, 2024 and December 31, 2022,2023, respectively, are reflected within Other Liabilities in the Company’s Consolidated Balance Sheets.
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The combined summarized statements of operations of the Company’s unconsolidated joint ventures are as follows: 
Three months ended September 30,Nine months ended September 30,
2023202220232022
(in thousands)(in thousands)
Total revenue (1)Total revenue (1)$153,551 $127,996 $469,745 $373,358 
ExpensesExpenses
Expenses
Expenses
Operating
Operating
OperatingOperating65,119 52,886 183,348 143,880 
Transaction costsTransaction costs78 (65)179 746 
Transaction costs
Transaction costs
Depreciation and amortization
Depreciation and amortization
Depreciation and amortizationDepreciation and amortization49,840 44,132 151,051 132,089 
Total expensesTotal expenses115,037 96,953 334,578 276,715 
Total expenses
Total expenses
Other income (expense)Other income (expense)
Loss from early extinguishment of debt— — (3)(1,327)
Other income (expense)
Other income (expense)
Interest expenseInterest expense(60,737)(40,678)(176,786)(103,270)
Unrealized gain on derivative instruments10,242 — 14,089 — 
Net loss$(11,981)$(9,635)$(27,533)$(7,954)
Interest expense
Interest expense
Unrealized gain (loss) on derivative instruments
Unrealized gain (loss) on derivative instruments
Unrealized gain (loss) on derivative instruments
Net income (loss)
Net income (loss)
Net income (loss)
Company’s share of net income (loss)Company’s share of net income (loss)$(4,476)$(2,251)$(10,739)$2,225 
Gain on investment (2)35,756 — 35,756 — 
Impairment losses on investments (3)(272,603)— (272,603)— 
Basis differential (4)(6,233)(1,273)(14,207)(3,614)
Loss from unconsolidated joint ventures$(247,556)$(3,524)$(261,793)$(1,389)
Company’s share of net income (loss)
Company’s share of net income (loss)
Gain on sale / consolidation
Gain on sale / consolidation
Gain on sale / consolidation
Basis differential (2)
Basis differential (2)
Basis differential (2)
Income (loss) from unconsolidated joint ventures
Income (loss) from unconsolidated joint ventures
Income (loss) from unconsolidated joint ventures
_______________ 
(1)Includes straight-line rent adjustments of approximately $7.7 million and $9.6$6.3 million for the three months ended September 30,March 31, 2024 and 2023, and 2022, respectively, and approximately $20.9 million and $54.9 million for the nine months ended September 30, 2023 and 2022, respectively.
(2)DuringIncludes depreciation and amortization of approximately $2.9 million and $3.7 million for the three months ended September 30,March 31, 2024 and 2023, the Company completed a restructuringrespectively. Includes unrealized gain (loss) on derivative instruments of its ownership in Metropolitan Square, as described below in this Note 5.
(3)Duringapproximately $2.7 million and $(2.8) million for the three months ended September 30,March 31, 2024 and 2023, the Company recognized an other-than-temporary impairment loss on its investments in Platform 16, 360 Park Avenue South, 200 Fifth Avenue and Safeco Plaza of approximately $155.2 million, $54.0 million, $33.4 million and $29.9 million respectively, as described below in this Note 5.
(4)respectively. Includes straight-line rent adjustments of approximately $0.4 million and $0.1$0.3 million for the three months ended September 30, 2023March 31, 2024 and 2022, respectively, and approximately $1.1 million and $0.3 million for the nine months ended September 30, 2023 and 2022, respectively.2023. Also includes net above-/below-market rent adjustments of approximately $0.2 million and $0.1 million for the three months ended September 30, 2023March 31, 2024 and 2022, respectively, and approximately $0.6 million and $0.3 million for the nine months ended September 30, 2023 and 2022.2023.
On January 31, 2023,2, 2024, a joint venture in which the Company has a 50% interest partially placed in-service 651 Gateway, an approximately 327,000 net rentable square foot laboratory/life sciences project in South San Francisco, California. The property is approximately 21% pre-leased as of May 2, 2024.
On January 8, 2024, the Company acquired aits joint venture partner’s 50% economic ownership interest in athe joint venture that owns 13100 and 13150 Worldgate Drive901 New York Avenue, located in Herndon, VirginiaWashington, DC, for a gross purchase price of approximately $17.0 million. The$10.0 million in cash (See Note 3). Prior to the acquisition, was completed with available cash. 13100 and 13150 Worldgate Drive consists of two vacant office buildings aggregating approximately 350,000 rentable square feet andthe Company had a 1,200-space structured parking deck situated on a 10-acre site. The joint venture intends to redevelop the property for residential use. There can be no assurance that50% economic ownership interest in the joint venture will commenceand accounted for it under the developmentequity method of accounting. The acquisition resulted in the Company having full ownership of the joint venture such that the Company now accounts for the assets, liabilities, and operations of it on a consolidated basis in its financial statements instead of under the equity method of accounting and as currently contemplated or at all.a result recognized a gain on consolidation of approximately $21.8 million.
On April 21, 2023,February 6, 2024, a joint venture in which the Company owns a 25% interest extended the maturity date of the loan collateralized by its 3 Hudson Boulevard property. The extended loan continues to bear interest at a variable rate equal to Term SOFR plus approximately 3.61% per annum and matures on May 9, 2024. At the time of the extension, the loan had an outstanding balance totaling $80.0 million and was scheduled to mature on February 9, 2024. 3 Hudson Boulevard consists of land and improvements held for future development located in New York, New York.
On February 9, 2024, a joint venture in which the Company owns a 50% interest exercised an option to extend the maturity date of the construction loan collateralized by its 7750 Wisconsin Avenue property. Prior to the extension, theThe construction loan had a total commitment amount of approximately $252.6 million, bore interest at a variable rate equal to London interbank offered rate (“LIBOR”) plus 1.25% per annum and was scheduled to mature on April 26, 2023, with two, one-year extension options, subject to certain conditions.million. The extended loan continuedcontinues to bear interest at LIBOR plus 1.25% per annum through June 1, 2023 after which, the interest rate was converted to a variable rate equal to Term Secured Overnight Finance Rate (“SOFR”) plus 1.35% per annum. The extended loan
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now matures on April 26, 2024, with a one-year extension option, subject to certain conditions. 7750 Wisconsin Avenue is a premier workplace with approximately 734,000 net rentable square feet located in Bethesda, Maryland.
On June 5, 2023, a joint venture in which the Company owns a 30% interest repaid the existing construction loan collateralized by its 500 North Capitol Street, NW property and obtained new mortgage loans with related parties. At the time of the pay off, the outstanding balance of the loan totaled approximately $105.0 million and the loan was scheduled to mature on June 6, 2023. The new mortgage loans have an aggregate principal balance of $105.0 million, bear interest at a weighted average fixed rate of 6.83% per annum and mature on June 5, 2026. The Company’s portion of the mortgage loans, $10.5 million, has been reflected as a Related Party Note Receivable on the Company’s Consolidated Balance Sheets. 500 North Capitol Street, NW is an approximately 231,000 net rentable square foot premier workplace in Washington, DC.
On June 28, 2023, a joint venture in which the Company owns a 25% interest exercised an option to extend by 30 days the maturity date of the loan collateralized by its 3 Hudson Boulevard property. At the time of the extension, the outstanding balance of the loan totaled $80.0 million, bore interest at a variable rate equal to LIBOR plus 3.50% per annum and was scheduled to mature on July 13, 2023, with two extension options (30 days and 180 days, respectively), subject to certain conditions. Following the extension, the modified loan was scheduled to mature on August 13, 2023, with one 180-day extension option, subject to certain conditions. The extended loan continued to bear interest at a variable rate equal to LIBOR plus 3.50% per annum for the period from June 28, 2023 through July 6, 2023. For the period commencing on July 7, 2023 through the maturity date, the modified loan bore interest at a variable rate equal to Term SOFR plus approximately 3.61%1.35% per annum. On August 11, 2023, the joint venture exercised its second extension option of 180-days. The extended loan nowannum and matures on February 9, 2024. As of September 30, 2023, the loan had approximately $25.6 million of accrued interest due at the maturity date. 3 Hudson Boulevard consists of land and improvements held for future development located in New York, New York.
On July 28, 2023, a joint venture in which the Company has a 50% interest modified and exercised an option to extend by one year the maturity date of its loan collateralized by 100 Causeway Street.April 26, 2025. At the time of the modification and extension, the loan had an outstanding balance totaling approximately $340.6$251.6 million and was scheduled to mature
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on April 26, 2024. 7750 Wisconsin Avenue is a premier workplace with approximately 736,000 net rentable square feet located in Bethesda, Maryland.
6. Debt
Mortgage Notes Payable
On January 8, 2024, the Company acquired its joint venture partner’s 50% economic ownership interest in the joint venture that owns 901 New York Avenue located in Washington, DC (See Note 3). The property is subject to existing mortgage indebtedness. At acquisition, the mortgage loan had an outstanding principal balance of approximately $207.1 million, bore interest at Term SOFR plus 1.60%3.61% per annum and was scheduled to mature on SeptemberJanuary 5, 2023. Following2025. The mortgage loan was recorded at a fair value of approximately $198.7 million. On January 11, 2024, the modification andCompany modified the mortgage loan to provide for two extension the loan had an outstanding balanceoptions totaling five years of $336.6 million, which included an approximately $4.0 million principal repayment, bears interest at Term SOFR plus 1.48% per annum, and matures on September 5, 2024, with an additional one-year extension option,term, each subject to certain conditions. 100 Causeway Street is an approximately 634,000 square foot premier workplace located in Boston, Massachusetts and is approximately 95% leased.
On September 1, 2023, a joint venture in which the Company has a 49% interest completed and fully placed in-service 751 Gateway, an approximately 231,000 square foot laboratory/life sciences project in South San Francisco, California. The property is 100% leased.
On September 6, 2023, a joint venture in which the Company has a 50% interest modified the loan collateralized by its Hub on Causeway - Podium property. At the time of the modification, the loan had an outstanding balance of approximately $174.3 million, bore interest at Term SOFR plus 2.35% per annum, and was scheduled to mature on September 6, 2023. Following the modification, the modified loan had an outstanding balance of $154.3 million, which included an approximately $20.0 million principal repayment, bears interest at Daily SOFR plus 2.50% per annum, and matures on September 8, 2025, with a one-year extension option, subject to certain conditions. On September 8, 2023, the joint venture entered into interest rate swap contracts with notional amounts aggregating approximately $154.3 million through September 2, 2025, resulting in a fixed interest rate of approximately 7.35% per annum through the expiration of the interest rate swap contracts. The Hub on Causeway - Podium is an approximately 383,000 square foot premier workplace located in Boston, Massachusetts and is approximately 94% leased.
On September 13, 2023, a joint venture in which the Company owned a 20% equity interest completed the first step of a two-step restructuring of its ownership in Metropolitan Square. The two-step restructuring will result in (i) an affiliate of the existing mezzanine lender purchasing the property and becoming the new property owner and the Company no longer having an equity interest in the property and (ii) the Company becoming a co-lender of up to $20.0 million under a new $100.0 million mezzanine loan (“New Mezz Loan”). Prior to the restructuring, the property was encumbered by an aggregate of $420.0 million of debt, consisting of a senior loan with an outstanding principal balance of $305.0 million (“Senior Loan”) and the existing $115.0 million mezzanine loan (“Existing Mezz Loan”). Step one of the restructuring was completed on September 13, 2023, and resulted in, among other things,
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(i) the cessation of the Company’s obligation to fund future investments through its then 20% equity interest, which caused the Company to recognize a gain on investment of approximately $35.8 million related to its deficit investment balance, which was primarily due to excess distributions, and (ii) the removal of the property from the Company’s in-service portfolio. Metropolitan Square is a 657,000 net rentable square foot premier workplace located at 655 15th Street, NW in the heart of downtown Washington, DC. See Note 14 for a description of step two of the restructuring.
Impairments
The Company’s investments in unconsolidated joint ventures are reviewed for indicators of impairment on a quarterly basis and the Company records impairment charges when events or circumstances indicate that a decline in the fair values below the carrying amounts has occurred and such decline is other-than-temporary. During the three months ended September 30, 2023, the Company continued to evaluate declining market conditions and underlying key assumptions of certain investments in unconsolidated joint ventures, including the receipt and consideration of certain third-party joint venture property appraisals. Such evaluation of key impairment indicators resulted in the Company determining that the decline in value, for certain joint venture properties, was other-than-temporary and therefore the Company recorded impairment charges during the three months ended September 30, 2023, as described below.
During the three months ended June 30, 2023, a joint venture in which the Company has a 55% interest elected to pause vertical construction on Platform 16 in San Jose, California. Platform 16 was planned to be constructed in phases to best accommodate market demand. The first phase of the development project included the construction of an approximately 390,000 net rentable square foot premier workplace building and below-grade parking garage. The joint venture intends to complete the construction of the below-grade parking garage and building foundation elements over the next several months to facilitate a restart of construction in the future as demand improves. Upon electing to pause vertical construction, the Company performed an analysis to determine if there was an other-than temporary impairment. Based on the market rent assumptions and new expected timeline for completion of the project, as of June 30, 2023, the Company concluded there was not an other-than temporary impairment present. During the three months ended September 30, 2023, the real estate and leasing conditions in the San Jose, California market continued to deteriorate and the Company further extended its construction pause assumption. These conditions, combined with a decrease in market rent assumptions, resulted in the Company recognizing a non-cash impairment charge totaling approximately $155.2 million, which represented the decline in the fair value below the carrying value of the Company’s investment in the unconsolidated joint venture that owns Platform 16. The Company determined that its investment was categorized within Level 3 of the fair value hierarchy, as it utilized significant unobservable inputs in its assessment, including an exit capitalization rate of 6.0%, and a discount rate of 12.0%.
During the three months ended September 30, 2023, the Company recognized a non-cash impairment charge totaling approximately $54.0 million, which represented the decline in the fair value below the carrying value of the Company’s investment in the unconsolidated joint venture that owns 360 Park Avenue South. The Company assessed the impairment and concluded that it was other than temporary. The Company determined that its investment was categorized within Level 3 of the fair value hierarchy, as it utilized significant unobservable inputs in its assessment, including an exit capitalization rate of 5.5% and leasing the currently available space over a longer period of time ending in 2026. 360 Park Avenue South is currently under redevelopment to be a premier workplace with approximately 450,000 net rentable square feet located in New York City, New York.
During the three months ended September 30, 2023, the Company recognized a non-cash impairment charge totaling approximately $33.4 million, which represented the decline in the fair value below the carrying value of the Company’s investment in the unconsolidated joint venture that owns 200 Fifth Avenue. The Company assessed the impairment and concluded that it was other than temporary. The Company determined that its investment was categorized within Level 3 of the fair value hierarchy, as it utilized significant unobservable inputs in its assessment, including an exit capitalization rate of 5.0% and a discount rate of 8.0%. 200 Fifth Avenue is a premier workplace with approximately 855,000 net rentable square feet located in New York City, New York.
During the three months ended September 30, 2023, the Company recognized a non-cash impairment charge totaling approximately $29.9 million, which represented the decline in the fair value below the carrying value of the Company’s investment in the unconsolidated joint venture that owns Safeco Plaza. The Company assessed the impairment and concluded that it was other than temporary. The Company determined that its investment was categorized within Level 3 of the fair value hierarchy, as it utilized significant unobservable inputs in its assessment, including an exit capitalization rate of 5.5%, a discount rate of 8.0% and a major lobby and repositioning renovation.
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Safeco Plaza is a premier workplace with approximately 779,000 net rentable square feet located in Seattle, Washington.
6. Debt
Unsecured Senior Notes
The following summarizes the unsecured senior notes outstanding as of September 30, 2023March 31, 2024 (dollars in thousands): 
Coupon/Stated RateEffective Rate(1)Principal AmountMaturity Date(2)
10.5 Year Unsecured Senior Notes3.800 %3.916 %$700,000 February 1, 2024
Coupon/Stated RateCoupon/Stated RateEffective Rate(1)Principal AmountMaturity Date(2)
7 Year Unsecured Senior Notes7 Year Unsecured Senior Notes3.200 %3.350 %850,000 January 15, 20257 Year Unsecured Senior Notes3.200 %3.350 %$850,000 January 15, 2025January 15, 2025
10 Year Unsecured Senior Notes10 Year Unsecured Senior Notes3.650 %3.766 %1,000,000 February 1, 202610 Year Unsecured Senior Notes3.650 %3.766 %1,000,000 February 1, 2026February 1, 2026
10 Year Unsecured Senior Notes10 Year Unsecured Senior Notes2.750 %3.495 %1,000,000 October 1, 202610 Year Unsecured Senior Notes2.750 %3.495 %1,000,000 October 1, 2026October 1, 2026
5 Year Unsecured Senior Notes5 Year Unsecured Senior Notes6.750 %6.924 %750,000 December 1, 20275 Year Unsecured Senior Notes6.750 %6.924 %750,000 December 1, 2027December 1, 2027
10 Year Unsecured Senior Notes10 Year Unsecured Senior Notes4.500 %4.628 %1,000,000 December 1, 202810 Year Unsecured Senior Notes4.500 %4.628 %1,000,000 December 1, 2028December 1, 2028
10 Year Unsecured Senior Notes10 Year Unsecured Senior Notes3.400 %3.505 %850,000 June 21, 202910 Year Unsecured Senior Notes3.400 %3.505 %850,000 June 21, 2029June 21, 2029
10.5 Year Unsecured Senior Notes10.5 Year Unsecured Senior Notes2.900 %2.984 %700,000 March 15, 203010.5 Year Unsecured Senior Notes2.900 %2.984 %700,000 March 15, 2030March 15, 2030
10.75 Year Unsecured Senior Notes10.75 Year Unsecured Senior Notes3.250 %3.343 %1,250,000 January 30, 203110.75 Year Unsecured Senior Notes3.250 %3.343 %1,250,000 January 30, 2031January 30, 2031
11 Year Unsecured Senior Notes11 Year Unsecured Senior Notes2.550 %2.671 %850,000 April 1, 203211 Year Unsecured Senior Notes2.550 %2.671 %850,000 April 1, 2032April 1, 2032
12 Year Unsecured Senior Notes12 Year Unsecured Senior Notes2.450 %2.524 %850,000 October 1, 203312 Year Unsecured Senior Notes2.450 %2.524 %850,000 October 1, 2033October 1, 2033
10.7 Year Unsecured Senior Notes10.7 Year Unsecured Senior Notes6.500 %6.619 %750,000 January 15, 203410.7 Year Unsecured Senior Notes6.500 %6.619 %750,000 January 15, 2034January 15, 2034
Total principalTotal principal10,550,000 
Less:Less:
Less:
Less:
Net unamortized discount
Net unamortized discount
Net unamortized discountNet unamortized discount14,027 
Deferred financing costs, netDeferred financing costs, net47,405 
Deferred financing costs, net
Deferred financing costs, net
TotalTotal$10,488,568 
Total
Total
_______________
(1)Yield on issuance date including the effects of discounts on the notes, settlements of interest rate contracts and the amortization of financing costs.
(2)No principal amounts are due prior to maturity.
On May 15, 2023,February 1, 2024, BPLP completed a public offering of $750.0repaid $700.0 million in aggregate principal amount of its 6.500% unsecured3.800% senior notes due 2034.February 1, 2024. The notes were priced at 99.697% ofrepayment was completed with available cash and the principal amount to yield an effective rate (including financing fees) of approximately 6.619% per annum to maturity. The notes will mature on January 15, 2034, unless earlier redeemed. The aggregate net$600.0 million proceeds from the offering were approximately $741.3 million after deducting underwriting discounts and transaction expenses.
On September 1, 2023, BPLP completed the repayment of $500.0 million in aggregate principal amount of its 3.125% senior notes due September 1,mortgage loan entered into on October 26, 2023. The repayment price was approximately $507.8$713.3 million, which was equal to the stated principal plus approximately $7.8$13.3 million of accrued and unpaid interest to, but not including, the repayment date. Excluding the accrued and unpaid interest, the repayment price was equal to the principal amount being repaid.
The indenture relating to the unsecured senior notes contains certain financial restrictions and requirements, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 50%, (3) an interest coverage ratio of greater than 1.50, and (4) an unencumbered asset value of not less than 150% of unsecured debt. At September 30, 2023,March 31, 2024, BPLP was in compliance with each of these financial restrictions and requirements.
Unsecured Credit Facility
25
BPLP’s unsecured credit facility (the “2021 Credit Facility”) provides for borrowings of up to $1.815 billion, as described below in this Note 6, through BPLP’s revolving facility (the “Revolving Facility”), subject to customary conditions. The 2021 Credit Facility matures on June 15, 2026 and includes a sustainability-linked pricing
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component. Under the 2021 Credit Facility, BPLP may increase the total commitment by up to $500.0 million by increasing the amount of the Revolving Facility and/or by incurring one or more term loans, in each case, subject to syndication of the increase and other conditions (the “Accordion”). On September 28, 2023, BPLP exercised a portion of the Accordion with three new lenders to the 2021 Credit Facility (“New Lenders”). Each of the New Lenders entered into a lender agreement with BPLP to provide an aggregate of $315.0 million in additional revolving credit commitments, which increased the maximum borrowing amount under the 2021 Credit Facility from $1.5 billion to $1.815 billion. All other terms of the 2021 Credit Facility remain unchanged.
At BPLP’s option, loans under the 2021 Credit Facility will bear interest at a rate per annum equal to (1) (a) in the case of loans denominated in Dollars, Term SOFR and SOFR, (b) in the case of loans denominated in Euro, EURIBOR, (c) in the case of loans denominated in Canadian Dollars, CDOR, and (d) in the case of loans denominated in Sterling, SONIA, in each case, plus a margin ranging from 70.0 to 140.0 basis points based on BPLP’s credit rating or (2) an alternate base rate equal to the greatest of (a) the Federal Funds rate plus 0.5%, (b) the administrative agent’s prime rate, (c) Term SOFR plus 1.00%, and (d) 1.00%, in each case, plus a margin ranging from 0 to 40 basis points based on BPLP’s credit rating.
The 2021 Credit Facility also features a sustainability-linked pricing component such that if BPLP meets certain sustainability performance targets, the applicable per annum interest rate will be reduced by one basis point. In addition, the 2021 Credit Facility contains a competitive bid option for up to 65% of the Revolving Facility that allows banks that are part of the lender consortium to bid to make loan advances to BPLPat a reduced interest rate.
Pursuant to the 2021 Credit Facility, BPLP is obligated to pay (1) in quarterly installments a facility fee on the total commitment under the Revolving Facility at a rate per annum ranging from 0.10% to 0.30% based on BPLP’s credit rating and (2) an annual fee on the undrawn amount of each letter of credit ranging from 0.70% to 1.40% based on BPLP’s credit rating.
On June 1, 2023, BPLP amended the 2021 Credit Facility to replace the LIBOR-based daily floating rate option with a SOFR-based daily floating rate option and to add options for SOFR-based term floating rates and rates for alternative currency loans. In addition, the amendment added a SOFR credit spread adjustment of 0.10%. Other than the foregoing, the material terms of the 2021 Credit Facility remain unchanged.
Based on BPLP’s September 30, 2023 credit rating, (1) the applicable Daily SOFR, Term SOFR, alternative currency daily rate, and alternative currency term rate margins are 0.775%, (2) the alternate base rate margin is zero basis points and (3) the facility fee is 0.15% per annum.
At September 30, 2023, BPLP had no amount outstanding under the Revolving Facility.
Unsecured Term Loan
On January 4, 2023, BPLP entered into a credit agreement that provided for a $1.2 billion unsecured term loan facility (the “2023 Unsecured Term Loan”). Under the credit agreement, BPLP may, at any time prior to the maturity date, increase total commitments by up to an additional $300.0 million in aggregate principal amount by increasing the existing 2023 Unsecured Term Loan or incurring one or more additional term loans, in each case, subject to syndication of the increase and other conditions. The 2023 Unsecured Term Loan matures on May 16, 2024, with one 12-month extension option, subject to customary conditions. Upon entry into the credit agreement, BPLP exercised its option to draw $1.2 billion under the 2023 Unsecured Term Loan, a portion of which was used to repay in full the $730.0 million outstanding under its prior unsecured credit agreement (the “2022 Unsecured Term Loan”), which was scheduled to mature on May 16, 2023. There was no prepayment penalty associated with the repayment of the 2022 Unsecured Term Loan.
At BPLP’s option, loans under the 2023 Unsecured Term Loan will bear interest at a rate per annum equal to (1) a base rate equal to the greatest of (a) the Federal Funds rate plus 0.5%, (b) the administrative agent’s prime rate, (c) Term SOFR for a one-month period plus 1.00%, and (d) 1.00%, in each case, plus a margin ranging from 0 to 60 basis points based on BPLP’s credit rating; or (2) a rate equal to adjusted Term SOFR with a one-month period plus a margin ranging from 75 to 160 basis points based on BPLP’s credit rating. Based on BPLP’s credit rating upon entry into the credit agreement, the base rate margin is 0 basis points and the Term SOFR margin is 0.85%. As of September 30, 2023, the 2023 Unsecured Term Loan bears interest at a rate equal to adjusted Term SOFR plus 0.85% (see Note 7). At September 30, 2023, BPLP had $1.2 billion outstanding under the 2023 Unsecured Term Loan.
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2021 Credit Facility and 2023 Unsecured Term Loan Compliance
The agreements governing the 2021 Credit Facility and 2023 Unsecured Term Loan contain customary representations and warranties, affirmative and negative covenants and events of default provisions, including the failure to pay indebtedness, breaches of covenants and bankruptcy and other insolvency events, which could result in the acceleration of the obligation to repay, in the case of the 2021 Credit Facility, all outstanding amounts and the cancellation of all commitments outstanding under the 2021 Credit Facility and, in the case of the 2023 Unsecured Term Loan, any outstanding amount under the 2023 Unsecured Term Loan. Among other covenants, the 2021 Credit Facility and the 2023 Unsecured Term Loan require that BPLP maintain on an ongoing basis: (1) a leverage ratio not to exceed 60%, however, the leverage ratio may increase to no greater than 65% provided that it is reduced back to 60% within one year, (2) a secured debt leverage ratio not to exceed 55%, (3) a fixed charge coverage ratio of at least 1.40, (4) an unsecured debt leverage ratio not to exceed 60%, however, the unsecured debt leverage ratio may increase to no greater than 65% provided that it is reduced to 60% within one year, (5) an unsecured debt interest coverage ratio of at least 1.75 and (6) limitations on permitted investments. At September 30, 2023, BPLP was in compliance with each of these financial and other covenant requirements.
7. Derivative Instruments and Hedging Activities
On May 2, 2023,BPLP’s agreements with the swap derivative counterparties contain provisions whereby if BPLP entered into four interest ratedefaults on the underlying indebtedness, including defaults where repayment of the indebtedness has not been accelerated by the lender, then BPLP could also be declared in default of the swap contracts with notional amounts aggregating $1.2 billion. BPLP entered into these interest rate swap contracts to reduce its exposurederivative obligation. As of March 31, 2024, the Company had not posted any collateral related to the variability in future cash flows attributable to changes in the 2023 Unsecured Term Loan interest rate. These interest rate swaps were entered into to fix Term SOFR, the reference rate for BPLP’s 2023 Unsecured Term Loan, at a weighted-average rate of 4.6420% for the period commencing on May 4, 2023 and ending on May 16, 2024 (see Note 6). For the three months ended September 30, 2023 and the period from May 4, 2023 through September 30, 2023, the Company recognized approximately $(1.9) million and $(2.8) million, respectively, of interest expense related to its interest rate swap contracts.agreements.
Effective Hedge Instruments
BPLP assesses the effectiveness of its hedges both at inception and on an ongoing basis. If the hedges are deemed to be effective, the fair value is recorded in “Accumulated other comprehensive income (loss)” in the Company’s Consolidated Balance Sheets and is subsequently reclassified into “Interest expense” in the Company’s Consolidated Statements of Operations in the period that the hedged forecasted transactions affect earnings. BPLP’s derivative financial instruments are cash flow hedges that are designated as effective hedges, and are carried at their estimated fair value on a recurring basis (See Note 2). The Company did not incur any ineffectiveness during the three and nine months ended September 30, 2023.March 31, 2024.
BPLP’s and SMBP LLC’s interest rate swap contracts consisted of the following at September 30, 2023March 31, 2024 (dollars in thousands):
Derivative InstrumentDerivative InstrumentAggregate Notional AmountStrike Rate RangeBalance Sheet Location
Effective DateMaturity DateLowHighFair Value
Effective Date
Effective DateMaturity DateLowHighFair Value
BPLP:
Interest Rate SwapsInterest Rate Swaps$1,200,000 May 4, 2023May 16, 20244.638 %4.646 %Prepaid expenses and other assets$5,457 
Interest Rate Swaps
Interest Rate Swaps
Interest Rate Swaps
1,800,000
SMBP LLC (1)
Interest Rate Swaps
Interest Rate Swaps
Interest Rate Swaps
$
_______________
(1)A subsidiary of the Company that is the borrower under the mortgage loan collateralized by its Santa Monica Business Park property.
The following table presents the location in the financial statements of the gains or losses recognized related to the Company’s cash flow hedges for the three and nine months ended September 30,March 31, 2024 and 2023 and 2022 (dollars in(in thousands):
Three months ended September 30,Nine months ended September 30,
2023202220232022
Three months ended March 31,
Three months ended March 31,
Three months ended March 31,
2024
2024
2024
Amount of gain (loss) related to the effective portion recognized in other comprehensive income (1)Amount of gain (loss) related to the effective portion recognized in other comprehensive income (1)$5,459 $10,800 $13,886 $18,400 
Amount of gain (loss) related to the effective portion recognized in other comprehensive income (1)
Amount of gain (loss) related to the effective portion recognized in other comprehensive income (1)
Amount of gain (loss) related to the effective portion subsequently reclassified to earnings (2)
Amount of gain (loss) related to the effective portion subsequently reclassified to earnings (2)
Amount of gain (loss) related to the effective portion subsequently reclassified to earnings (2)Amount of gain (loss) related to the effective portion subsequently reclassified to earnings (2)$1,677 $1,677 $5,026 $5,030 
Amount of gain (loss) relate do the ineffective portion and amount excluded from effectiveness testingAmount of gain (loss) relate do the ineffective portion and amount excluded from effectiveness testing$— $— $— $— 
Amount of gain (loss) relate do the ineffective portion and amount excluded from effectiveness testing
Amount of gain (loss) relate do the ineffective portion and amount excluded from effectiveness testing
_______________
(1)Includes the Company’s share of gain (loss) related to the effective portion of derivatives outstanding at its unconsolidated joint venture properties.
(2)Consists ofIncludes amounts from previous interest rate programs.
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BPLP has formally documented all of its relationships between hedge instruments and hedging items, as well as its risk-management objectives and strategy for undertaking various hedge transactions. While management believes its judgments are reasonable, a change in a derivative's effectiveness as a hedge could materially affect expenses, net income (loss) and equity.
BPLP’s
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Ineffective Hedging Instruments
During the year ended December 31, 2023, to satisfy a lender requirement, the Company entered into two agreements with the swap derivative counterparties contain provisions whereby if BPLP defaults onsame third-party to purchase and sell a $600.0 million interest rate cap. The Company did not elect hedge accounting, and as such, any change in market value will be recognized in Gain (losses) from interest rate contracts in the underlying indebtedness, including defaults where repaymentConsolidated Statement of Operations. For the indebtedness has not been accelerated by the lender, then BPLP could also be declared in default of the swap derivative obligation. As of September 30,three months ended March 31, 2024 and 2023, the Company had not posted any collateral relatedrecognized no impact to theits Consolidated Statement of Operations from entering into these agreements.
8. Commitments and Contingencies
General
In the normal course of business, the Company guarantees its performance of services or indemnifies third parties against its negligence. In addition, in the normal course of business, the Company guarantees to certain tenants the obligations of its subsidiaries for the payment of tenant improvement allowances and brokerage commissions in connection with their leases and limited costs arising from delays in delivery of their premises. 
The Company had letter of credit and performance obligations related to lender and development requirements that total approximately $21.6 million at September 30, 2023.March 31, 2024.
Certain of the Company’s joint venture agreements include provisions whereby, at certain specified times, each partner has the right to initiate a purchase or sale of its interest in the joint ventures. From time to time, under certain of the Company’s joint venture agreements, if certain return thresholds are achieved, either the Company or its partners may be entitled to an additional promoted interest or payments.
From time to time, the Company (or ventures in which the Company has an ownership interest) has agreed, and may in the future agree, to (1) guarantee portions of the principal, interest and other amounts in connection with their borrowings, (2) provide customary environmental indemnifications and nonrecourse carve-outs (e.g., guarantees against fraud, misrepresentation and bankruptcy) in connection with their borrowings and (3) provide guarantees to lenders, tenants and other third parties for the completion of development projects. The Company has agreements with its outside or joint venture partners whereby the partners agree to reimburse the joint venture for their share of any payments made under the guarantee. In some cases, the Company earns a fee from the applicable joint venture for providing the guarantee.
In connection with the refinancing of 767 Fifth Avenue’s (the General Motors Building) secured loan by the Company’s consolidated joint venture entity, 767 Venture, LLC, the Company guaranteed the consolidated entity’s obligation to fund various reserves for tenant improvement costs and allowances, leasing commissions and free rent obligations in lieu of cash deposits. As of September 30, 2023,March 31, 2024, the maximum funding obligation under the guarantee was approximately $10.0$8.5 million. The Company earns a fee from the joint venture for providing the guarantee and has an agreement with the outside partners to reimburse the joint venture for their share of any payments made under the guarantee. As of September 30, 2023,March 31, 2024, no amounts related to the guarantee were recorded as liabilities in the Company’s consolidated financial statements.
In connection with the developmentsale of the Company’s 290 Binney Street project located in Cambridge, Massachusetts, which commenced on January 5, 2023 (see Note 3), the Cambridge Zoning Ordinance requires that a building permit for the construction of a residential project of at least 400,000 square feet be issued prior to or concurrently with the issuance of a building permit for the commercial building. 290 Binney Street and the residential project are components of the Company’s future life sciences development project located in the heart of KendallMetropolitan Square, in Cambridge, Massachusetts. When completedwhich the Company expectshad a 20% equity interest, the projectCompany agreed to become a co-lender of up to $20.0 million under a mezzanine loan. The mezzanine loan has a maximum principal amount of $100.0 million, and it is subordinate only to an existing senior loan. The mezzanine loan may be drawn upon for future lease-up, operating and other costs on an as needed basis, and amounts borrowed will consistbear interest at a per annum rate of two premier workplace properties aggregating12%, compounded monthly. As of March 31, 2024, the Company has funded approximately 1.1 million rentable square feet of life sciences space and the approximately 400,000 square foot residential building. $2.2 million.
Legal Matters 
The commencement of construction of each phase of the overall projectCompany is subject to various conditions, somelegal proceedings and claims that arise in the ordinary course of business. These matters are generally covered by insurance. Management believes that the final outcome of such matters will not have a material adverse effect on the financial position, results of operations or liquidity of the Company.
In connection with the acquisition of a premier workplace in New York City in 2010, the Company entered into an agreement with the seller pursuant to which are not within the Company’s control. Thereseller could earn various fees based on the future leasing performance of the property. The Company initially accrued approximately $1.5 million as an estimate of the fees it would owe the seller. The seller filed suit against the Company claiming that consideration significantly in excess of the initial reserve amount is owed under the agreement in 2020. The disagreement between the Company and the
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seller involves material issues of contract interpretation and, more importantly, the method of calculating fees, including various inputs (both facts and assumptions) that drive the calculation. In February 2024, a summary judgment was issued interpreting certain sections of the agreement in favor of the seller’s claims. The Company believes it has meritorious defenses to the seller’s claims, is disputing the seller’s calculations and intends to continue defending itself vigorously. However, there can be no assurance that the conditionsCompany will prevail in the lawsuit. If the court ultimately agrees with the seller’s calculations, then amounts due to the seller could theoretically be satisfied oras high as the additional $31 million claimed in the seller’s complaint, plus interest. Although the Company rejects those calculations, there can be no assurance that the Company’s ultimate liability will not be significantly greater than its established accrual.
On April 26, 2024, Brammer Bio MA, LLC (“Brammer”), a subsidiary of Thermo Fisher Scientific Inc. and an abutter to the Company’s 290 Binney Street development project located in Cambridge, Massachusetts, filed a complaint in Superior Court in Suffolk County, Massachusetts against the Company relating to certain ongoing construction activities.
In the first quarter of 2023, the Company commenced development of 290 Binney Street, an approximately 566,000 net rentable square foot laboratory/life sciences property that is 100% pre-leased to AstraZeneca Pharmaceuticals (“AstraZeneca”). The Company has a 55% interest in the joint venture that owns 290 Binney Street. Brammer subleases the premises at 250 Binney Street, the Company’s approximately 67,000 net rentable square foot life sciences property that is adjacent to 290 Binney Street.
Brammer alleges that, as a result of the Company’s construction of 290 Binney Street, it is threatened with irreparable harm due to intrusion onto the 250 Binney Street premises and the loss of its property rights. Brammer also alleges that the 290 Binney Street development project has caused and is causing major disruption to its manufacturing operations, and that it has suffered and will continue to suffer damages in the form of losses to its clients and customers. Brammer brought the action for quiet title, breach of contract, trespass and nuisance, and it is seeking declaratory and injunctive relief and specific performance purportedly to protect its property interests in the premises located at 250 Binney Street.
The Company believes Brammer’s claims are without merit and intends to defend against them vigorously. However, there can be no assurance the Company will commenceprevail in the development oflitigation. If the remaining phasesCompany is enjoined from further construction activities, it could suffer delays in construction that could result in its failure to deliver a completed building on the terms and schedule currently contemplated by the Company’s lease with AstraZeneca or at all.all, and this could result in owing financial penalties to AstraZeneca and other third parties. Although the Company is unable to estimate a range of loss for all related matters for which losses are reasonably possible, if the court grants injunctive relief or awards monetary damages to Brammer, it could have a material adverse effect on the Company’s results of operations and financial condition.
Insurance
The Company’s property insurance program per occurrence limits are $1.0 billion for its portfolio insurance program, including coverage for acts of terrorism other than nuclear, biological, chemical or radiological terrorism (“Terrorism Coverage”). The Company also carries $1.35 billion of property insurance in excess of the $1.0 billion of
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coverage in the Company’s property insurance program for 601 Lexington Avenue, New York, New York, consisting of $750 million of property and Terrorism Coverage in excess of the Company’s property insurance program and $600 million of Terrorism Coverage only in excess of the $1.75 billion of coverage. Certain properties, including the General Motors Building located at 767 Fifth Avenue in New York, New York (“767 Fifth Avenue”), are currently insured in separate insurance programs. The property insurance program per occurrence limits for 767 Fifth Avenue are $1.625 billion, including Terrorism Coverage. The Company also currently carries nuclear, biological, chemical and radiological terrorism insurance coverage for acts of terrorism certified under the Federal Terrorism Risk Insurance Act (as amended, “TRIA”) (“NBCR Coverage”), which is provided by IXP as a direct insurer, for the properties in the Company’s portfolio, including 767 Fifth Avenue, but excluding certain other properties owned in joint ventures with third parties or which the Company manages. The per occurrence limit for NBCR Coverage is $1.0 billion. Under TRIA, after the payment of the required deductible and coinsurance, the NBCR Coverage provided by IXP is backstopped by the Federal Government if the aggregate industry insured losses resulting from a certified act of terrorism exceed a “program trigger.” The program trigger is $200 million, the coinsurance is 20% and the deductible is 20% of the premiums earned by the insurer for the year prior to a claim. If the Federal Government pays out for a loss under TRIA, it is mandatory that the Federal Government recoup the full amount of the loss from insurers offering TRIA coverage after the payment of the loss pursuant to a formula in TRIA. The Company may elect to terminate the NBCR Coverage if the Federal Government seeks recoupment for losses paid
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under TRIA, if TRIA is not extended after its expiration on December 31, 2027, if there is a change in its portfolio or for any other reason. The Company intends to continue to monitor the scope, nature and cost of available terrorism insurance.
The Company also currently carries earthquake insurance on its properties located in areas known to be subject to earthquakes. Specifically, the Company currently carries earthquake insurance which covers its San Francisco and Los Angeles regions with a $330 million per occurrence limit, and a $330 million annual aggregate limit, $30 million of which is provided by IXP, as a direct insurer. This insurance is subject to a deductible in the amount of 5% of the value of the affected property. In addition, the Company currently carries earthquake insurance which covers its Seattle region with a $110 million per occurrence limit, and a $110 million annual aggregate limit. This insurance is subject to a deductible in the amount of 2% of the value of the affected property. The amount of the Company’s earthquake insurance coverage may not be sufficient to cover losses from earthquakes. In addition, the amount of earthquake coverage could impact the Company’s ability to finance properties subject to earthquake risk. The Company may discontinue earthquake insurance or change the structure of its earthquake insurance program on some or all of its properties in the future if the premiums exceed the Company’s estimation of the value of the coverage.
IXP, a captive insurance company which is a wholly-owned subsidiary of the Company, acts as a direct insurer with respect to a portion of the Company’s earthquake insurance coverage for its Greater San Francisco and Los Angeles properties and the Company’s NBCR Coverage. Insofar as the Company owns IXP, it is responsible for its liquidity and capital resources, and the accounts of IXP are part of the Company’s consolidated financial statements. In particular, if a loss occurs which is covered by the Company’s NBCR Coverage but is less than the applicable program trigger under TRIA, IXP would be responsible for the full amount of the loss without any backstop by the Federal Government. IXP would also be responsible for any recoupment charges by the Federal Government in the event losses are paid out and its insurance policy is maintained after the payout by the Federal Government. If the Company experiences a loss and IXP is required to pay under its insurance policy, the Company would ultimately record the loss to the extent of the required payment. Therefore, insurance coverage provided by IXP should not be considered as the equivalent of third-party insurance, but rather as a modified form of self-insurance. In addition, BPLP has issued a guarantee to cover liabilities of IXP in the amount of $20.0 million.
The Company continues to monitor the state of the insurance market in general, and the scope and costs of coverage for acts of terrorism, earthquakes, pandemics and pandemics,cybersecurity incidents, in particular, but the Company cannot anticipate what coverage will be available on commercially reasonable terms in future policy years. There are other types of losses, such as from wars, for which the Company cannot obtain insurance at all or at a reasonable cost. With respect to such losses and losses from acts of terrorism, earthquakes, pandemics or other catastrophic events, if the Company experiences a loss that is uninsured or that exceeds policy limits, the Company could lose the capital invested in the damaged properties, as well as the anticipated future revenues from those properties. Depending on the specific circumstances of each affected property, it is possible that the Company could be liable for mortgage indebtedness or other obligations related to the property. Any such loss could materially and adversely affect the Company’s business, and financial condition and results of operations.
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9. Noncontrolling Interests
Noncontrolling interests relate to the interests in BPLP not owned by BXP and interests in consolidated property partnerships not wholly-owned by the Company. As of September 30, 2023,March 31, 2024, the noncontrolling interests in BPLP consisted of 16,509,597 OP Units, 2,072,732 LTIP Units (including 480,511the following:
OP UnitsLTIP Units (1)2022 MYLTIP Units2023 MYLTIP Units2024 MYLTIP Units
16,492,1712,666,636252,151322,053330,479
__________
(1)Includes 666,405 LTIP Units earned by employees under the Company’s multi-year long-term incentive awards granted between 2012 and 20202021 (i.e., 2012 OPP and 2013 - 20202021 MYLTIP awards)), 349,267 2021 MYLTIP Units, 252,151 2022 MYLTIP Units and 322,053 2023 MYLTIP Units held by parties other than BXP..
Noncontrolling Interest—Common Units
During the ninethree months ended September 30, 2023, 100,422March 31, 2024, 36,305 OP Units were presented by the holders for redemption (including an aggregate of 93,58622,155 OP Units issued upon conversion of LTIP Units, 2012 OPP Units and MYLTIP Units) and were redeemed by BXP in exchange for an equal number of shares of Common Stock.
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At September 30, 2023,March 31, 2024, BPLP had outstanding 349,267 2021 MYLTIP Units, 252,151the 2022 MYLTIP Units and 322,053 2023- 2024 MYLTIP Units. Prior to the end of the respective three-year performance period for each plan, holders of MYLTIP Units are entitled to receive per unit distributions equal to one-tenth (10%) of the regular quarterly distributions payable on an OP Unit, but will not be entitled to receive any special distributions. After the three-year performance period for each plan has ended, (1) the number of MYLTIP Units, both vested and unvested, that MYLTIP award recipients have earned, if any, based on the establishment of a performance pool, will be entitled to receive distributions in an amount per unit equal to distributions, both regular and special, payable on an OP Unit and (2) with respect to the 20212022 - 20232024 MYLTIP Units, the Company will make a “catch-up” cash payment on the MYLTIP Units that are ultimately earned in an amount equal to the regular and special dividends, if any, declared during the performance period on a number of shares of Common Stock agreed to the number of 2022 - 2024 MYLTIP Units that are earned, less the distributions actually paid during the performance period on all of the awarded 20212022 - 20232024 MYLTIP Units.
On February 3, 2023,1, 2024, the measurement period for the Company’s 20202021 MYLTIP awards ended and, based on BXP’s absolute and relative TSR performance, the final payout was determined to be 50%112% of target, or an aggregate of approximately $3.8$12.6 million (after giving effect to employee separations). As a result, an aggregate of 152,460 2020155,625 2021 MYLTIP Units that had been previously granted were automatically forfeited.
The following table presents BPLP’s distributions on the OP Units and LTIP Units (including the 2012 OPP Units, 2013 - 2019and MYLTIP Units paid or declared in 2024 and after the February 3, 2023 measurement date, the 2020 MYLTIP Units) and its distributions on the 2020 MYLTIP Units (prior to the February 3, 2023 measurement date) and 2021 - 2023 MYLTIP Units (after the February 7, 2023 issuance date of the 2023 MYLTIP Units) that occurred during the ninethree months ended September 30,March 31, 2023:
Record DatePayment DateDistributions per OP Unit and LTIP UnitDistributions per MYLTIP Unit
September 29, 2023October 31, 2023$0.98 $0.098 
June 30, 2023July 31, 2023$0.98 $0.098 
March 31, 2023April 28, 2023$0.98 $0.098 
December 30, 2022January 30, 2023$0.98 $0.098 
The following table presents BPLP’s distributions on the OP Units and LTIP Units (including the 2012 OPP Units, 2013 - 2018 MYLTIP Units and, after the February 4, 2022 measurement date, the 2019 MYLTIP Units) and its distributions on the 2019 MYLTIP Units (prior to the February 4, 2022 measurement date) and 2020 - 2022 MYLTIP Units (after the February 1, 2022 issuance date of the 2022 MYLTIP Units) that occurred during the nine months ended September 30, 2022:
Record DatePayment DateDistributions per OP Unit and LTIP UnitDistributions per MYLTIP Unit
September 30, 2022October 31, 2022$0.98 $0.098 
June 30, 2022July 29, 2022$0.98 $0.098 
March 31, 2022April 29, 2022$0.98 $0.098 
December 31, 2021January 28, 2022$0.98 $0.098 
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Record DatePayment DateDistributions per OP Unit and LTIP UnitDistributions per MYLTIP Unit
March 28, 2024April 30, 2024$0.98 $0.098 
December 29, 2023January 30, 2024$0.98 $0.098 
March 31, 2023April 28, 2023$0.98 $0.098 
December 30, 2022January 30, 2023$0.98 $0.098 
A holder of an OP Unit may present the OP Unit to BPLP for redemption at any time (subject to restrictions agreed upon at the time of issuance of OP Units to particular holders that may restrict such redemption right for a period of time, generally one year from issuance). Upon presentation of an OP Unit for redemption, BPLP must redeem the OP Unit for cash equal to the then value of a share of Common Stock of BXP. BXP may, in its sole discretion, elect to assume and satisfy the redemption obligation by paying either cash or issuing one share of Common Stock. The value of the OP Units (other than OP Units owned by BXP), and LTIP Units (including the 2012 OPP Units and 2013 - 20202021 MYLTIP Units), assuming in each case that all conditions had been met for the conversion thereof, had all of such units been redeemed at September 30, 2023March 31, 2024 was approximately $1.2$1.3 billion based on the last reported price of a share of Common Stock on the New York Stock Exchange of $59.48$65.31 per share on September 29, 2023.March 28, 2024.
Noncontrolling Interests—Property Partnerships
The noncontrolling interests in property partnerships consist of the outside equity interests in ventures that are consolidated with the financial results of the Company because the Company exercises control over the entities that own the properties. The equity interests in these ventures that are not owned by the Company, totaling approximately $1.7 billion and $1.6 billion and $1.5 billion at September 30, 2023at March 31, 2024 and December 31, 2022,2023, respectively, are included in Noncontrolling Interests—Property Partnerships on the accompanying Consolidated Balance Sheets.
On July 28, 2023,March 21, 2024, the Company entered intocompleted the sale of a joint venture agreement with an45% interest in 290 Binney Street in Cambridge, Massachusetts.  The institutional investor forfunded approximately $97.2 million in cash at closing, which is less than 45% of the future developmentagreed upon carrying value of 343 Madison Avenue located on Madison Avenue between 44th and 45th Streets in New York City, New York adjacent to Grand Central Station. Priorthe property immediately prior to the formation of the joint venture,transaction.  The institutional investor will fund all construction costs until its equity balance is proportionate to its ownership percentage, after which the Company and the institutional investor were engaged in a collaborative arrangement.will fund the development project based on their respective ownership interests.  The Company ownsretains a 55% interest in the venture and its partner owns a 45% interest, and the Company will provide customary development, property management, and leasing services. The joint venture partner contributed approximately $4.8 million in cash and $17.5 million in improvements and prepaid ground rent for their 45% ownership interest in the joint venture. The Company contributed approximately $5.9 million in cash and $21.4 million in improvements and prepaid ground rent for its 55% ownership interest in the joint venture.  The transaction did not qualify as a sale of real estate for financial reporting purposes as the Company continues to effectively control thisthe property and thus will continue to account for the property on a consolidated basis in its financial statements and no gain was recognized in the Consolidated Statements of Operations.  The Company provides customary development, property management and leasing services to the joint venture. 
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The Company has accounted for the transaction as an equity transaction and as of March 21, 2024 has recognized noncontrolling interest in its Consolidated Balance Sheets totaling approximately $104.6 million, which is equal to 45% of the aggregate carrying value of the total equity of the property immediately prior to the transaction.  The difference between the cash proceeds received and the noncontrolling interest recognized, which was approximately $7.5 million, has been reflected as a decrease in additional paid-in capital in the Company’s Consolidated Balance Sheets.  At the end of each reporting period, there will be a reallocation of the partners’ equity balances such that the ending balance in each partners’ capital account reflects each partners’ claim on net assets. These adjustments will impact additional paid-in capital and noncontrolling interest in property partnerships in the Company’s Consolidated Balance Sheets. For the period ended March 31, 2024, the adjustment was approximately $50.7 million. 
290 Binney Street is an approximately 566,000 net rentable square foot laboratory/life sciences development project located in Cambridge, Massachusetts.  The  development project is 100% pre-leased to a life sciences company.  
10. Stockholders’ Equity / Partners’ Capital
As of September 30, 2023,March 31, 2024, BXP had 156,939,180157,049,171 shares of Common Stock outstanding.
As of September 30, 2023,March 31, 2024, BXP owned 1,755,2151,762,080 general partnership units and 155,183,965155,287,091 limited partnership units in BPLP.
On May 17, 2023, BXP renewed its “at the market” (“ATM”) stock offering program through which it may sell from time to time up to an aggregate of $600.0 million of its Common Stock through sales agents over a three-year period. Under the ATM stock offering program, BXP may also engage in forward sale transactions with affiliates of certain sales agents for the sale of its Common Stock on a forward basis. This program replaced BXP’s prior $600.0 million ATM stock offering program that was scheduled to expire on May 22, 2023. BXP intends to use the net proceeds from any offering for general business purposes, which may include investment opportunities and debt reduction. No shares of Common Stock have been issued under this ATM stock offering program.
During the ninethree months ended September 30, 2023, BXP did not issue any shares of Common Stock upon the exercise of options to purchase Common Stock. As a result of the applicable exercise period ending, 103,641 options were forfeited during the nine months ended September 30, 2023. As of September 30, 2023, BXP no longer has any outstanding options.
During the nine months ended September 30, 2023,March 31, 2024, BXP issued 100,42236,305 shares of Common Stock in connection with the redemption of an equal number of redeemable OP Units from limited partners.
The following table presents BXP’s dividends per share and BPLP’s distributions per OP Unit and LTIP Unit paid or declared in 20232024 and during the ninethree months ended September 30, 2022:March 31, 2023:
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Record DatePayment DateDividend (Per Share)Distribution (Per Unit)
September 29, 2023October 31, 2023$0.98 $0.98 
June 30, 2023July 31, 2023$0.98 $0.98 
March 31, 2023April 28, 2023$0.98 $0.98 
December 30, 2022January 30, 2023$0.98 $0.98 
September 30, 2022October 31, 2022$0.98 $0.98 
June 30, 2022July 29, 2022$0.98 $0.98 
March 31, 2022April 29, 2022$0.98 $0.98 
December 31, 2021January 28, 2022$0.98 $0.98 
Record DatePayment DateDividend (Per Share)Distribution (Per Unit)
March 28, 2024April 30, 2024$0.98 $0.98 
December 29, 2023January 30, 2024$0.98 $0.98 
March 31, 2023April 28, 2023$0.98 $0.98 
December 30, 2022January 30, 2023$0.98 $0.98 
11. Segment Information
The following tables present reconciliations of Net Income Attributable to Boston Properties, Inc. to the Company’s share of Net Operating Income and Net Income Attributable to Boston Properties Limited Partnership to the Company’s share of Net Operating Income for the three and nine months ended September 30, 2023March 31, 2024 and 2022.2023.
BXP
 Three months ended September 30,Nine months ended September 30,
2023202220232022
(in thousands)
Net income (loss) attributable to Boston Properties, Inc.$(111,826)$360,977 $70,290 $727,144 
Add:
Noncontrolling interest—common units of the Operating Partnership(12,626)40,883 8,642 82,821 
Noncontrolling interests in property partnerships20,909 18,801 59,337 54,896 
Interest expense147,812 111,846 424,492 317,216 
Net operating income from unconsolidated joint ventures39,165 35,316 122,175 108,347 
Loss from unconsolidated joint ventures247,556 3,524 261,793 1,389 
Depreciation and amortization expense207,435 190,675 618,746 551,445 
Transaction costs751 1,650 1,970 2,146 
Payroll and related costs from management services contracts3,906 3,900 13,750 11,204 
General and administrative expense31,410 32,519 131,387 110,378 
Less:
Net operating income attributable to noncontrolling interests in property partnerships50,047 48,306 145,102 143,223 
Unrealized gain (loss) on non-real estate investment(51)— 332 — 
Gains (losses) from investments in securities(925)(1,571)2,311 (8,549)
Other income - assignment fee— — — 6,624 
Interest and other income (loss)20,715 3,728 48,999 6,151 
Gains on sales of real estate517 262,345 517 381,293 
Direct reimbursements of payroll and related costs from management services contracts3,906 3,900 13,750 11,204 
Development and management services revenue9,284 7,465 28,122 19,650 
Company’s share of Net Operating Income$490,999 $475,918 $1,473,449 $1,407,390 
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BXP
 Three months ended March 31,
20242023
(in thousands)
Net income attributable to Boston Properties, Inc.$79,883 $77,890 
Add:
Noncontrolling interest—common units of the Operating Partnership9,500 9,078 
Noncontrolling interests in property partnerships17,221 18,660 
Interest expense161,891 134,207 
Impairment loss13,615 — 
Net operating income from unconsolidated joint ventures35,430 40,756 
Depreciation and amortization expense218,716 208,734 
Transaction costs513 911 
Payroll and related costs from management services contracts4,293 5,235 
General and administrative expense50,018 55,802 
Less:
Net operating income attributable to noncontrolling interests in property partnerships46,570 47,097 
Unrealized gain on non-real estate investment396 259 
Gains from investments in securities2,272 1,665 
Interest and other income (loss)14,529 10,941 
Income (loss) from unconsolidated joint ventures19,186 (7,569)
Direct reimbursements of payroll and related costs from management services contracts4,293 5,235 
Development and management services revenue6,154 8,980 
Company’s share of Net Operating Income$497,680 $484,665 
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BPLP
Three months ended September 30,Nine months ended September 30,
2023202220232022
(in thousands)
Net income (loss) attributable to Boston Properties Limited Partnership$(122,696)$403,578 $84,232 $819,195 
(in thousands)
(in thousands)
(in thousands)
Net income attributable to Boston Properties Limited Partnership
Add:Add:
Add:
Add:
Noncontrolling interests in property partnerships
Noncontrolling interests in property partnerships
Noncontrolling interests in property partnershipsNoncontrolling interests in property partnerships20,909 18,801 59,337 54,896 
Interest expenseInterest expense147,812 111,846 424,492 317,216 
Interest expense
Interest expense
Impairment loss
Impairment loss
Impairment loss
Net operating income from unconsolidated joint venturesNet operating income from unconsolidated joint ventures39,165 35,316 122,175 108,347 
Loss from unconsolidated joint ventures247,556 3,524 261,793 1,389 
Net operating income from unconsolidated joint ventures
Net operating income from unconsolidated joint ventures
Depreciation and amortization expense
Depreciation and amortization expense
Depreciation and amortization expenseDepreciation and amortization expense205,679 188,969 613,446 546,271 
Transaction costsTransaction costs751 1,650 1,970 2,146 
Transaction costs
Transaction costs
Payroll and related costs from management services contracts
Payroll and related costs from management services contracts
Payroll and related costs from management services contractsPayroll and related costs from management services contracts3,906 3,900 13,750 11,204 
General and administrative expenseGeneral and administrative expense31,410 32,519 131,387 110,378 
General and administrative expense
General and administrative expense
Less:
Less:
Less:Less:
Net operating income attributable to noncontrolling interests in property partnershipsNet operating income attributable to noncontrolling interests in property partnerships50,047 48,306 145,102 143,223 
Unrealized gain (loss) on non-real estate investment(51)— 332 — 
Gains (losses) from investments in securities(925)(1,571)2,311 (8,549)
Other income - assignment fee— — — 6,624 
Net operating income attributable to noncontrolling interests in property partnerships
Net operating income attributable to noncontrolling interests in property partnerships
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment
Gains from investments in securities
Gains from investments in securities
Gains from investments in securities
Interest and other income (loss)Interest and other income (loss)20,715 3,728 48,999 6,151 
Gains on sales of real estate517 262,357 517 385,349 
Interest and other income (loss)
Interest and other income (loss)
Income (loss) from unconsolidated joint ventures
Income (loss) from unconsolidated joint ventures
Income (loss) from unconsolidated joint ventures
Direct reimbursements of payroll and related costs from management services contracts
Direct reimbursements of payroll and related costs from management services contracts
Direct reimbursements of payroll and related costs from management services contractsDirect reimbursements of payroll and related costs from management services contracts3,906 3,900 13,750 11,204 
Development and management services revenueDevelopment and management services revenue9,284 7,465 28,122 19,650 
Development and management services revenue
Development and management services revenue
Company’s share of Net Operating IncomeCompany’s share of Net Operating Income$490,999 $475,918 $1,473,449 $1,407,390 
Company’s share of Net Operating Income
Company’s share of Net Operating Income
Net operating income (“NOI”) is a non-GAAP financial measure equal to net income (loss) attributable to Boston Properties, Inc. and net income (loss) attributable to Boston Properties Limited Partnership, as applicable, the most directly comparable GAAP financial measures, plus (1) net income (loss) attributable to noncontrolling interests, interest expense, impairment loss, from unconsolidated joint ventures, depreciation and amortization expense, transaction costs, payroll and related costs from management services contracts and corporate general and administrative expense less (2) unrealized gain (loss) on non-real estate investment, gains (losses) from investments in securities, other income - assignment fee, interest and other income (loss), gains on sales of real estate,income (loss) from unconsolidated joint ventures, direct reimbursements of payroll and related costs from management services contracts and development and management services revenue. The Company believes NOI is useful to investors as a performance measure and believes it provides useful information to investors regarding its results of operations and financial condition because, when compared across periods, it reflects the impact on operations from trends in occupancy rates, rental rates, operating costs and acquisition and development activity on an unleveraged basis, providing perspective not immediately apparent from net income (loss) attributable to Boston Properties, Inc. and net income (loss) attributable to Boston Properties Limited Partnership. For example, interest expense is not necessarily linked to the operating performance of a real estate asset and is often incurred at the corporate level as opposed to the property level. Similarly, interest expense may be incurred at the property level even though the financing proceeds may be used at the corporate level (e.g., used for other investment activity). In addition, depreciation and amortization expense, because of historical cost accounting and useful life estimates, may distort operating performance measures at the property level. NOI presented by the Company may not be comparable to NOI reported by other REITs or real estate companies that define NOI differently.
The Company’s internal reporting utilizes its share of NOI, which includes its share of NOI from consolidated and unconsolidated joint ventures, which is a non-GAAP financial measure that is calculated as the consolidated
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amount, plus the Company’s share of the amount from the Company’s unconsolidated joint ventures (calculated based upon the Company’s economic percentage ownership interest and, in some cases, after priority allocations), less the Company’s partners’ share of the amount from the Company’s consolidated joint ventures (calculated based upon the partners’ economic percentage ownership interests and, in some cases, after priority allocations,
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income allocation to private REIT shareholders and their share of fees due to the Company). The Company’s share of NOI from unconsolidated joint ventures, as defined above, also does not include its share of losses from early extinguishment of debt from unconsolidated joint ventures, unrealized gain (loss) on derivative instruments and gain on investment, and impairment losses on investments,sale / consolidation, all of which are included within LossIncome (Loss) from Unconsolidated Joint Ventures in the Company’s Consolidated Statements of Operations.  Management utilizes its share of NOI in assessing its performance as the Company has several significant joint ventures and, in some cases, the Company exercises significant influence over, but does not control, the joint venture, in which case GAAP requires that the Company account for the joint venture entity using the equity method of accounting and the Company does not consolidate it for financial reporting purposes. In other cases, GAAP requires that the Company consolidate the venture even though the Company’s partner(s) owns a significant percentage interest. As a result, the presentations of the Company’s share of NOI should not be considered a substitute for, and should only be considered together with and as a supplement to, the Company’s financial information presented in accordance with GAAP.
Asset information by segment is not reported because the Company does not use this measure to assess performance. Therefore, depreciation and amortization expense is not allocated among segments. Interest expense, impairment loss, from unconsolidated joint ventures, depreciation and amortization expense, transaction costs, payroll and related costs from management services contracts, corporate general and administrative expense, unrealized gain (loss) on non-real estate investment, gains (losses) from investments in securities, other income - assignment fee, interest and other income (loss), gains on sales of real estate,income (loss) from unconsolidated joint ventures, direct reimbursements of payroll and related costs from management services contracts and development and management services revenue are not included in NOI and are provided as reconciling items to the Company’s reconciliations of its share of NOI to net income.
The Company’s segments are based on the Company’s method of internal reporting which classifies its operations by geographic area. The Company’s segments by geographic area are Boston, Los Angeles, New York, San Francisco, Seattle and Washington, DC. The Company also presents information for each segment by property type, including Premier Workplace (which includes office, life sciences and retail), Residential and Hotel.

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Information by geographic area and property type (dollars in thousands):
For the three months ended September 30, 2023:March 31, 2024:
BostonLos AngelesNew YorkSan FranciscoSeattleWashington, DCTotal
BostonBostonLos AngelesNew YorkSan FranciscoSeattleWashington, DCTotal
Rental Revenue: (1)Rental Revenue: (1)
Premier Workplace
Premier Workplace
Premier WorkplacePremier Workplace$276,153 $— $268,680 $135,839 $13,660 $91,488 $785,820 
ResidentialResidential4,198 — — 3,214 — 4,377 11,789 
HotelHotel13,484 — — — — — 13,484 
TotalTotal293,835 — 268,680 139,053 13,660 95,865 811,093 
% of Grand Totals% of Grand Totals36.23 %— %33.13 %17.14 %1.68 %11.82 %100.00 %% of Grand Totals35.33 %2.46 %31.46 %16.47 %1.32 %12.96 %100.00 %
Rental Expenses:Rental Expenses:
Premier Workplace
Premier Workplace
Premier WorkplacePremier Workplace97,358 — 107,462 50,450 2,971 36,213 294,454 
ResidentialResidential1,629 — — 2,221 — 1,888 5,738 
HotelHotel9,020 — — — — — 9,020 
TotalTotal108,007 — 107,462 52,671 2,971 38,101 309,212 
% of Grand Totals% of Grand Totals34.94 %— %34.75 %17.03 %0.96 %12.32 %100.00 %% of Grand Totals35.23 %2.05 %33.57 %15.35 %0.96 %12.84 %100.00 %
Net operating incomeNet operating income$185,828 $— $161,218 $86,382 $10,689 $57,764 $501,881 
% of Grand Totals% of Grand Totals37.03 %— %32.12 %17.21 %2.13 %11.51 %100.00 %% of Grand Totals35.39 %2.72 %30.13 %17.18 %1.54 %13.04 %100.00 %
Less: Net operating income attributable to noncontrolling interests in property partnershipsLess: Net operating income attributable to noncontrolling interests in property partnerships(11,786)— (38,261)— — — (50,047)
Add: Company’s share of net operating income from unconsolidated joint venturesAdd: Company’s share of net operating income from unconsolidated joint ventures7,946 12,508 3,938 4,023 1,874 8,876 39,165 
Company’s share of net operating incomeCompany’s share of net operating income$181,988 $12,508 $126,895 $90,405 $12,563 $66,640 $490,999 
% of Grand Totals% of Grand Totals37.07 %2.55 %25.84 %18.41 %2.56 %13.57 %100.00 %% of Grand Totals35.71 %4.24 %24.88 %18.60 %1.95 %14.62 %100.00 %
  _______________
(1)Rental Revenue is equal to Total Revenue per the Company’s Consolidated Statements of Operations, less Development and Management Services Revenue and Direct Reimbursements of Payroll and Related Costs from Management Services Contracts Revenue per the Consolidated Statements of Operations.
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For the three months ended September 30, 2022:
BostonLos AngelesNew YorkSan FranciscoSeattleWashington, DCTotal
Rental Revenue: (1)
Premier Workplace$255,958 $— $260,926 $134,938 $12,293 $88,954 $753,069 
Residential3,837 — — 3,133 — 7,370 14,340 
Hotel11,749 — — — — — 11,749 
Total271,544 — 260,926 138,071 12,293 96,324 779,158 
% of Grand Totals34.85 %— %33.49 %17.72 %1.58 %12.36 %100.00 %
Rental Expenses:
Premier Workplace91,226 — 99,942 47,068 3,125 33,317 274,678 
Residential1,552 — — 2,125 — 3,347 7,024 
Hotel8,548 — — — — — 8,548 
Total101,326 — 99,942 49,193 3,125 36,664 290,250 
% of Grand Totals34.91 %— %34.43 %16.95 %1.08 %12.63 %100.00 %
Net operating income$170,218 $— $160,984 $88,878 $9,168 $59,660 $488,908 
% of Grand Totals34.81 %— %32.93 %18.18 %1.88 %12.20 %100.00 %
Less: Net operating income attributable to noncontrolling interests in property partnerships(11,293)— (37,013)— — — (48,306)
Add: Company’s share of net operating income (loss) from unconsolidated joint ventures8,169 13,143 (259)3,233 1,978 9,052 35,316 
Company’s share of net operating income$167,094 $13,143 $123,712 $92,111 $11,146 $68,712 $475,918 
% of Grand Totals35.12 %2.76 %25.99 %19.35 %2.34 %14.44 %100.00 %
  _______________
(1)Rental Revenue is equal to Total Revenue per the Company’s Consolidated Statements of Operations, less Development and Management Services Revenue and Direct Reimbursements of Payroll and Related Costs from Management Services Contracts Revenue per the Consolidated Statements of Operations.
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Information by geographic area and property type (dollars in thousands):
For the nine months ended September 30,March 31, 2023:
BostonLos AngelesNew YorkSan FranciscoSeattleWashington, DCTotal
Rental Revenue: (1)
Premier Workplace$815,568 $— $789,851 $408,173 $44,978 $272,872 $2,331,442 
Residential12,371 — — 10,720 — 12,677 35,768 
Hotel35,554 — — — — — 35,554 
Total863,493 — 789,851 418,893 44,978 285,549 2,402,764 
% of Grand Totals35.95 %— %32.87 %17.43 %1.87 %11.88 %100.00 %
Rental Expenses:
Premier Workplace293,004 — 312,895 144,732 9,013 105,908 865,552 
Residential4,782 — — 6,609 — 5,593 16,984 
Hotel23,852 — — — — — 23,852 
Total321,638 — 312,895 151,341 9,013 111,501 906,388 
% of Grand Totals35.49 %— %34.52 %16.70 %0.99 %12.30 %100.00 %
Net operating income$541,855 $— $476,956 $267,552 $35,965 $174,048 $1,496,376 
% of Grand Totals36.22 %— %31.87 %17.88 %2.40 %11.63 %100.00 %
Less: Net operating income attributable to noncontrolling interests in property partnerships(33,946)— (111,156)— — — (145,102)
Add: Company’s share of net operating income (loss) from unconsolidated joint ventures25,294 38,501 10,951 10,819 5,598 31,012 122,175 
Company’s share of net operating income$533,203 $38,501 $376,751 $278,371 $41,563 $205,060 $1,473,449 
% of Grand Totals36.19 %2.61 %25.57 %18.89 %2.82 %13.92 %100.00 %
  _______________
(1)Rental Revenue is equal to Total Revenue per the Company’s Consolidated Statements of Operations, less Development and Management Services Revenue and Direct Reimbursements of Payroll and Related Costs from Management Services Contracts Revenue per the Consolidated Statements of Operations.

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For the nine months ended September 30, 2022:
BostonLos AngelesNew YorkSan FranciscoSeattleWashington, DCTotal
BostonBostonLos AngelesNew YorkSan FranciscoSeattleWashington, DCTotal
Rental Revenue: (1)Rental Revenue: (1)
Premier Workplace
Premier Workplace
Premier WorkplacePremier Workplace$742,972 $— $772,060 $401,020 $18,765 $280,473 $2,215,290 
ResidentialResidential11,181 — — 11,374 — 21,663 44,218 
HotelHotel28,395 — — — — — 28,395 
TotalTotal782,548 — 772,060 412,394 18,765 302,136 2,287,903 
% of Grand Totals% of Grand Totals34.20 %— %33.75 %18.02 %0.82 %13.21 %100.00 %% of Grand Totals35.76 %— %32.72 %17.71 %1.81 %12.00 %100.00 %
Rental Expenses:Rental Expenses:
Premier Workplace
Premier Workplace
Premier WorkplacePremier Workplace268,781 — 291,645 135,677 4,805 101,623 802,531 
ResidentialResidential4,481 — — 9,138 — 9,655 23,274 
HotelHotel19,832 — — — — — 19,832 
TotalTotal293,094 — 291,645 144,815 4,805 — 111,278 845,637 
% of Grand Totals% of Grand Totals34.66 %— %34.49 %17.12 %0.57 %13.16 %100.00 %% of Grand Totals36.34 %— %34.39 %16.20 %0.99 %12.08 %100.00 %
Net operating incomeNet operating income$489,454 $— $480,415 $267,579 $13,960 $190,858 $1,442,266 
% of Grand Totals% of Grand Totals33.94 %— %33.31 %18.55 %0.97 %13.23 %100.00 %% of Grand Totals35.41 %— %31.71 %18.63 %2.30 %11.95 %100.00 %
Less: Net operating income attributable to noncontrolling interests in property partnershipsLess: Net operating income attributable to noncontrolling interests in property partnerships(34,405)— (108,818)— — — (143,223)
Add: Company’s share of net operating income (loss) from unconsolidated joint ventures25,996 40,147 (397)9,597 5,877 27,127 108,347 
Add: Company’s share of net operating income from unconsolidated joint ventures
Company’s share of net operating incomeCompany’s share of net operating income$481,045 $40,147 $371,200 $277,176 $19,837 $217,985 $1,407,390 
% of Grand Totals% of Grand Totals34.18 %2.85 %26.38 %19.69 %1.41 %15.49 %100.00 %% of Grand Totals35.41 %2.73 %25.39 %19.59 %2.71 %14.17 %100.00 %
  _______________
(1)Rental Revenue is equal to Total Revenue per the Company’s Consolidated Statements of Operations, less Development and Management Services Revenue and Direct Reimbursements of Payroll and Related Costs from Management Services Contracts Revenue per the Consolidated Statements of Operations.
12. Earnings Per Share / Common Unit
BXP
The following table provides a reconciliation of both the net income (loss) attributable to Boston Properties, Inc. and the number of common shares used in the computation of basic earnings per share (“EPS”), which is calculated by dividing net income (loss) attributable to Boston Properties, Inc. by the weighted-average number of common shares outstanding during the period. Unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are also participating securities. As such, unvested restricted common stock of BXP and BPLP’s LTIP Units, 2012 OPP Units and MYLTIP Units are considered participating securities. Participating securities are included in the computation of basic EPS of BXP using the two-class method. Participating securities are included in the computation of diluted EPS of BXP using the if-converted method if the impact is dilutive. Because the 2012 OPP Units and 2013 - 20202021 MYLTIP Units required, and the 20212022 - 20232024 MYLTIP Units require, BXP to outperform absolute and/or relative returncertain performance thresholds, unless such thresholds have been met by the end of the applicable reporting period, BXP excludes such units from the diluted EPS calculation. Other potentially dilutive common shares, including stock options, restricted stock and other securities of BPLP that are exchangeable for BXP’s Common Stock, and the related impact on earnings, are considered when calculating diluted EPS.
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Three months ended September 30, 2023
Income
(Numerator)
Shares
(Denominator)
Per Share
Amount
(in thousands, except for per share amounts)
Three months ended March 31, 2024Three months ended March 31, 2024
Income
(Numerator)
Income
(Numerator)
Shares
(Denominator)
Per Share
Amount
(in thousands, except for per share amounts)(in thousands, except for per share amounts)
Basic Earnings:Basic Earnings:
Net income (loss) attributable to Boston Properties, Inc.$(111,826)156,880 $(0.71)
Net income attributable to Boston Properties, Inc.
Net income attributable to Boston Properties, Inc.
Net income attributable to Boston Properties, Inc.
Effect of Dilutive Securities:Effect of Dilutive Securities:
Effect of Dilutive Securities:
Effect of Dilutive Securities:
Stock Based CompensationStock Based Compensation— — — 
Diluted Earnings:
Net income (loss) attributable to Boston Properties, Inc.$(111,826)156,880 $(0.71)
Three months ended September 30, 2022
Income
(Numerator)
Shares
(Denominator)
Per Share
Amount
(in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc.$360,977 156,754 $2.30 
Allocation of undistributed earnings to participating securities(762)— — 
Net income attributable to Boston Properties, Inc.360,215 156,754 2.30 
Effect of Dilutive Securities:
Stock Based Compensation
Stock Based CompensationStock Based Compensation— 379 (0.01)
Diluted Earnings:Diluted Earnings:
Net income attributable to Boston Properties, Inc.Net income attributable to Boston Properties, Inc.$360,215 157,133 $2.29 
Net income attributable to Boston Properties, Inc.
Net income attributable to Boston Properties, Inc.
Three months ended March 31, 2023
Three months ended March 31, 2023
Three months ended March 31, 2023
Income
(Numerator)
Income
(Numerator)
Shares
(Denominator)
Per Share
Amount
(in thousands, except for per share amounts)(in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc.
Net income attributable to Boston Properties, Inc.
Net income attributable to Boston Properties, Inc.
Effect of Dilutive Securities:
Effect of Dilutive Securities:
Effect of Dilutive Securities:
Stock Based Compensation
Stock Based Compensation
Stock Based Compensation
Diluted Earnings:
Net income attributable to Boston Properties, Inc.
Net income attributable to Boston Properties, Inc.
Net income attributable to Boston Properties, Inc.
 Nine months ended September 30, 2023
 Income
(Numerator)
Shares
(Denominator)
Per Share
Amount
 (in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc.$70,290 156,837 $0.45 
Effect of Dilutive Securities:
Stock Based Compensation— 340 — 
Diluted Earnings:
Net income attributable to Boston Properties, Inc.$70,290 157,177 $0.45 
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 Nine months ended September 30, 2022
 Income
(Numerator)
Shares
(Denominator)
Per Share
Amount
 (in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc.$727,144 156,708 $4.64 
Allocation of undistributed earnings to participating securities(1,002)— (0.01)
Net income attributable to Boston Properties, Inc.726,142 156,708 4.63 
Effect of Dilutive Securities:
Stock Based Compensation— 436 (0.01)
Diluted Earnings:
Net income attributable to Boston Properties, Inc.$726,142 157,144 $4.62 
BPLP
The following table provides a reconciliation of both the net income (loss) attributable to Boston Properties Limited Partnership and the number of common units used in the computation of basic earnings per common unit, which is calculated by dividing net income (loss) attributable to Boston Properties Limited Partnership by the weighted-average number of common units outstanding during the period. Unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are also participating securities. As such, unvested restricted common stock of BXP and BPLP’s LTIP Units, 2012 OPP Units and MYLTIP Units are considered participating securities. Participating securities are included in the computation of basic earnings per common unit using the two-class method. Participating securities are included in the computation of diluted earnings per common unit using the if-converted method if the impact is dilutive. Because the 2012 OPP Units and 2013 - 20202021 MYLTIP Units required, and the 20212022 - 20232024 MYLTIP Units require, BXP to outperform absolute and/or relative returncertain performance thresholds, unless such thresholds have been met by the end of the applicable reporting period, BPLP excludes such units from the diluted earnings per common unit calculation. Other potentially dilutive common units and the related impact on earnings are considered when calculating diluted earnings per common unit. Included in the number of units (the denominator) below are approximately 18,002,00018,272,000 and 17,662,00017,849,000 redeemable common units for the three months ended September 30,March 31, 2024 and 2023, and 2022, respectively, and 17,928,000 and 17,631,000 redeemable common units for the nine months ended September 30, 2023 and 2022, respectively.
 Three months ended September 30, 2023
 Income
(Numerator)
Units
(Denominator)
Per Unit
Amount
 (in thousands, except for per unit amounts)
Basic Earnings:
Net income (loss) attributable to Boston Properties Limited Partnership$(122,696)174,882 $(0.70)
Effect of Dilutive Securities:
Stock Based Compensation— — — 
Diluted Earnings:
Net income (loss) attributable to Boston Properties Limited Partnership$(122,696)174,882 $(0.70)
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Three months ended September 30, 2022 Three months ended March 31, 2024
Income
(Numerator)
Units
(Denominator)
Per Unit
Amount
Income
(Numerator)
Units
(Denominator)
Per Unit
Amount
(in thousands, except for per unit amounts) (in thousands, except for per unit amounts)
Basic Earnings:Basic Earnings:
Net income attributable to Boston Properties Limited PartnershipNet income attributable to Boston Properties Limited Partnership$403,578 174,416 $2.31 
Allocation of undistributed earnings to participating securities(848)— — 
Net income attributable to Boston Properties Limited PartnershipNet income attributable to Boston Properties Limited Partnership402,730 174,416 2.31 
Net income attributable to Boston Properties Limited Partnership
Effect of Dilutive Securities:Effect of Dilutive Securities:
Effect of Dilutive Securities:
Effect of Dilutive Securities:
Stock Based Compensation
Stock Based Compensation
Stock Based CompensationStock Based Compensation— 379 (0.01)
Diluted Earnings:Diluted Earnings:
Net income attributable to Boston Properties Limited PartnershipNet income attributable to Boston Properties Limited Partnership$402,730 174,795 $2.30 
Net income attributable to Boston Properties Limited Partnership
Net income attributable to Boston Properties Limited Partnership
Three months ended March 31, 2023
Three months ended March 31, 2023
Three months ended March 31, 2023
Income
(Numerator)
Income
(Numerator)
Units
(Denominator)
Per Unit
Amount
(in thousands, except for per unit amounts)(in thousands, except for per unit amounts)
Basic Earnings:
Net income attributable to Boston Properties Limited Partnership
Net income attributable to Boston Properties Limited Partnership
Net income attributable to Boston Properties Limited Partnership
Effect of Dilutive Securities:
Effect of Dilutive Securities:
Effect of Dilutive Securities:
Stock Based Compensation
Stock Based Compensation
Stock Based Compensation
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership
Net income attributable to Boston Properties Limited Partnership
Net income attributable to Boston Properties Limited Partnership
Nine months ended September 30, 2023
Income
(Numerator)
Units
(Denominator)
Per Unit
Amount
(in thousands, except for per unit amounts)
Basic Earnings:
Net income attributable to Boston Properties Limited Partnership$84,232 174,765 $0.48 
Effect of Dilutive Securities:
Stock Based Compensation— 340 — 
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership$84,232 175,105 $0.48 
 Nine months ended September 30, 2022
 Income
(Numerator)
Units
(Denominator)
Per Unit
Amount
 (in thousands, except for per unit amounts)
Basic Earnings:
Net income attributable to Boston Properties Limited Partnership$819,195 174,339 $4.70 
Allocation of undistributed earnings to participating securities(1,115)— (0.01)
Net income attributable to Boston Properties Limited Partnership818,080 174,339 4.69 
Effect of Dilutive Securities:
Stock Based Compensation— 436 (0.01)
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership$818,080 174,775 $4.68 
13. Stock Option and Incentive Plan
On January 25, 2023,2024, the Compensation Committee of BXP’s Compensation CommitteeBoard of Directors approved the grant of 2023 MYLTIP2024 Multi-Year Long-Term Incentive Program (the “2024 MYLTIP”) awards under the Boston Properties, Inc. 2021 Stock Incentive Plan (the “2021 Plan”) to certain executive officers of BXP, effective February 7, 2023.BXP. The 20232024 MYLTIP awards consistconsists of two, equallythree components. Two of the components, each weighted (50% each) components that40%, utilize BXP’s TSR over a three-yearthree year measurement period as the performance metric.
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Total earned awards undermetrics and the 2023 MYLTIP, if any, will equalthird component utilizes a leverage ratio as the sum of the number of LTIP Units earned under the first and second components andperformance metric. Earned awards will range from zero to a maximum of 322,053330,479 LTIP Units depending on BXP’s performance under the three components, with a target of approximately 161,026165,240 LTIP Units and linear interpolation between zero and maximum. Earned awards (if any) will vest 100% on February 6, 2026, but, in general, may not be converted, redeemed, sold or otherwise transferred for one additional year thereafter. The 2023 MYLTIP awards are in the form of LTIP Units issued on the grant date, and they are subject to forfeiture to the extent awards are not earned. Prior to the performance measurement date holders of the 2023 MYLTIP Units are only entitled to one-tenth (10%) of the regular quarterly distributions payable on common partnership units. Following the completion of the three-year performance period, the Company will also make a “catch-up” cash payment on the 2023 MYLTIP Units that are ultimately earned in an amount equal to the regular and special distributions, if any, declared during the performance period on BXP’s Common Stock, less the distributions actually paid to holders of 2023 MYLTIP Units during the performance period on all of the awarded 2023 MYLTIP Units. Under ASC 718 “Compensation - Stock Compensation,” the 20232024 MYLTIP awards have an aggregate value of approximately $13.1 million, which amount will generally be amortized into earnings under the graded vesting method.$11.1 million.
On February 3, 2023,1, 2024, the measurement period for the Company’s 20202021 MYLTIP awards ended and, based on BXP’s absolute and relative TSR performance, the final payout was determined to be 50%112% of target, or an aggregate of approximately $3.8$12.6 million (after giving effect to employee separations). As a result, an aggregate of 152,460 2020155,625 2021 MYLTIP Units that had been previously granted were automatically forfeited.
During the ninethree months ended September 30, 2023,March 31, 2024, BXP issued 73,41476,228 shares of restricted common stock and BPLP issued 430,824431,123 LTIP Units and 322,053 2023330,479 2024 MYLTIP Units to employees and non-employee directors under the 2021 Plan. Employees and non-employee directors paid $0.01 per share of restricted common stock and $0.25 per LTIP Unit and 20232024 MYLTIP Unit. When issued, LTIP Units are not economically equivalent in value to a share of Common Stock, but over time can increase in value to one-for-one parity with Common Stock if there is sufficient appreciation in the value of the Company’s assets. The aggregate value of the LTIP Units is included in noncontrolling interests in the Consolidated Balance Sheets of BXP and BPLP. A substantial majority of the grants of restricted common stock and LTIP Units to employees vest in four equal annual installments. Restricted common stock is measured at fair value on the date of grant based on the number of shares granted and the closing price of BXP’s Common Stock on the date of grant as quoted on the New York Stock Exchange. Such value is recognized as an expense ratably over the corresponding employee service period. The shares of restricted common stock granted during the ninethree months ended September 30, 2023March 31, 2024 were valued at approximately $5.4$4.9 million. The LTIP Units
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granted were valued at approximately $29.4$25.6 million using a Monte Carlo simulation method model. Because the 2012 OPP Units and 2013 - 20232024 MYLTIP Units are subject to both a service condition and a market condition, the Company recognizes the related compensation expense under the graded vesting attribution method. Under the graded vesting attribution method, each portion of the award that vests at a different date is accounted for as a separate award and recognized over the period appropriate to that portion so that the compensation cost for each portion should be recognized in full by the time that portion vests. The Company recognizes forfeitures as they occur on its awards of stock-based compensation. Dividends paid on both vested and unvested shares of restricted stock are charged directly to Dividends in Excess of Earnings in Boston Properties, Inc.’s Consolidated Balance Sheets and Partners’ Capital in Boston Properties Limited Partnership’s Consolidated Balance Sheets. Aggregate stock-based compensation expense associated with restricted stock, LTIP Units and MYLTIP Units was approximately $4.8$18.5 million and $7.7$25.9 million for the three months ended September 30,March 31, 2024 and 2023, and 2022, respectively, and $45.7 million and $43.2 million for the nine months ended September 30, 2023 and 2022, respectively. At September 30, 2023,March 31, 2024, there was (1) an aggregate of approximately $25.1$38.9 million of unrecognized compensation expense related to unvested restricted stock LTIP Units and 2020 MYLTIPLTIP Units and (2) an aggregate of approximately $0.5$5.8 million of unrecognized compensation expense related to unvested 20212022 - 20232024 MYLTIP Units that is expected to be recognized over a weighted-average period of approximately 2.52.7 years.
14. Subsequent Events
On OctoberApril 5, 2024, the Company completed and fully placed in-service 760 Boylston Street, an approximately 118,000 net rentable square feet retail redevelopment located in Boston, Massachusetts.
On April 16, 2024, BPLP provided notice to exercise its one-year extension option on its $1.2 billion unsecured term loan facility (the “2023 Unsecured Term Loan”). BPLP anticipates effectuating the extension on or prior to the current May 16, 2024 maturity date. Upon effectiveness, the 2023 Unsecured Term Loan will mature on May 16, 2025. After making an approximately $500.0 million optional repayment on April 29, 2024, the 2023 Unsecured Term Loan has an outstanding principal balance of $700.0 million as of May 2, 2023, step two2024.
On April 17, 2024, BPLP established an unsecured commercial paper program. Under the terms of the Metropolitan Square restructuring (See Note 5 for a description of step one) was completed and included (i) the sale of the property and assignment of the Senior Loanprogram, BPLP may issue, from time to the new owner, and (ii) the closing of the New Mezz Loan withtime, unsecured commercial paper notes up to a maximum principalaggregate amount outstanding at any one time of $100.0$500 million with varying maturities of up to one year. The notes will be sold in private placements and will rank pari passu with all of BPLP’s other unsecured senior indebtedness, including its outstanding senior notes. The commercial paper program is backstopped by available capacity under BPLP's unsecured revolving credit facility (the “2021 Credit Facility”). As of May 2, 2024, BPLP had $500.0 million outstanding under its commercial paper program that is senior to the Existing Mezz Loan and subordinate only to the Senior Loan. The New Mezz Loan may be drawn upon for future lease-up, operating and other costs on an as needed basis, and amounts borrowed will bearbears interest at a per annumweighted-average rate of 12%, compounded monthly. The Company will fund 20%, or up5.58% per annum. Proceeds from the commercial paper program were used to $20.0 million, of any amounts borrowedreduce BPLP’s 2023 Unsecured Term Loan to $700.0 million.
On April 29, 2024, BPLP increased the current maximum borrowing amount under the New Mezz Loan. In addition,2021 Credit Facility from $1.815 billion to $2.0 billion. All other terms of the Company will continue to provide property management and leasing services to2021 Credit Facility, including its maturity date of June 15, 2026, remain unchanged. BPLP had no borrowings under the property with the potential to earn additional incentive fees. Metropolitan Square is an approximately 657,000 square foot premier workplace located at 655 15th Street, NW in the heart2021 Credit Facility as of downtown Washington, DC.May 2, 2024.
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On October 26, 2023, the Company closed on a mortgage loan collateralized by its 325 Main Street, 355 Main Street, 90 Broadway and Cambridge East Garage (also known as Kendall Center Green Garage) properties located in Cambridge, Massachusetts. The mortgage loan, totaling $600 million, requires interest-only payments at Daily Compounded SOFR plus 2.25% per annum until maturity on October 26, 2028.
On November 4, 2023, the Company entered into an Amended and Restated Employment Agreement with Owen D. Thomas. For additional information, see Part II, Item 5(a) of this From 10-Q.
On November 6, 2023, WeWork Inc. and certain of its direct and indirect subsidiaries (collectively, “WeWork”) filed voluntary petitions to commence proceedings under Chapter 11 of title 11 of the United States Code in the United States Bankruptcy Court for the District of New Jersey. WeWork is a tenant at five of the Company’s premier workplaces and leases an aggregate of approximately 493,000 square feet, approximately 0.97% of the Company’s in-service portfolio. There can be no assurance that WeWork will not reject one or more of the five leases.
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ITEM 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations.
The following discussion should be read in conjunction with the financial statements and notes thereto appearing elsewhere in this report.
This Quarterly Report on Form 10-Q, including the documents incorporated by reference, contain forward-looking statements within the meaning of the federal securities laws, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended.amended (the “Exchange Act”). We intend these forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995, and we are including this statement for purposes of complying with those safe harbor provisions, in each case, to the extent applicable. The forward-looking statements are contained principally, but not only, under the captions “RiskRisk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” We caution investors that forward-looking statements are based on current beliefs, expectations of future events and assumptions made by, and information currently available to, our management. When used, the words “anticipate,” “believe,” “budget,” “could,” “estimate,” “expect,” “intend,” “may,” “might,” “plan,” “project,” “should,” “will” and similar expressions that do not relate solely to historical matters are intended to identify forward-looking statements. These statements are subject to risks, uncertainties and assumptions and are not guarantees of future performance or occurrences, which may be affected by known and unknown risks, trends, uncertainties and factors that are, in some cases, beyond our control. If one or more of these known or unknown risks or uncertainties materialize, or if underlying assumptions prove incorrect, actual results may vary materially from those expressed or implied by the forward-looking statements. We caution you that, while forward-looking statements reflect our good-faith beliefs when we make them, they are not guarantees of future performance or occurrences and are impacted by actual events when they occur after we make such statements. Accordingly, investors should use caution in relying on forward-looking statements, which are based on results and trends at the time they are made, to anticipate future results or trends.
The most significant factors that may cause actual results to differ materially from those expressed or implied by the forward-looking statements include the risks and uncertainties related to the impact of changes in general economic and capital market conditions, including continued inflation, increasing interest rates, supply chain disruptions, labor market disruptions, dislocation and volatility in capital markets, and potential longer-term changes in consumer and client behavior resulting from the severity and duration of any downturn in the U.S. or global economy, sustained changes in client preferences and space utilization, as well as the other important factors below and the risks described in (i) our Annual Report on Form 10-K for the fiscal year ended December 31, 20222023 including those described under the caption “Risk Factors,” (ii) our Quarterly Report on Form 10-Q for the fiscal quarters ended March 31, 2023 and June 30, 2023, (iii) our subsequent filings under the Exchange Act and (iv)(iii) the risk factors set forth in this Form 10-Q in Part II, Item 1A, if any.
Some of the risks and uncertainties that may cause our actual results, performance or achievements to differ materially from those expressed or implied by forward-looking statements include, among others, the following:
volatile or adverse global economic and geopolitical conditions, health crises and dislocations in the credit markets and potential financial contagion from recent or future failures of banking institutions could adversely affect economic conditions and/or restrict our access to cost-effective capital, which could have a material adverse effect on our business opportunities, results of operations and financial condition;
general risks affecting the real estate industry (including, without limitation, the inability to enter into or renew leases, changes in client preferences and space utilization, dependence on clients’ financial condition, and competition from other developers, owners and operators of real estate);
the impact of geopolitical conflicts;
the immediate and long-term impact of the outbreak of a highly infectious or contagious disease on our and our clients’ financial condition, results of operations and cash flows (including the impact of actions taken to contain the outbreak or mitigate its impact, the direct and indirect economic effects of the outbreak and containment measures on our clients, and the ability of our clients to successfully operate their businesses);
failure to manage effectively our growth and expansion into new markets and sub-markets or to integrate acquisitions and developments successfully;
the ability of our joint venture partners to satisfy their obligations;
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risks and uncertainties affecting property development and construction (including, without limitation, continued inflation, supply chain disruptions, labor shortages, construction delays, increased construction costs, cost overruns, inability to obtain necessary permits, client accounting considerations that may result in negotiated lease provisions that limit a client’s liability during construction, and public opposition to such activities);
risks associated with the availability and terms of financing and the use of debt to fund acquisitions and developments or refinance existing indebtedness, including the impact of higher interest rates on the cost and/or availability of financing;
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risks associated with forward interest rate contracts and derivatives and the effectiveness of such arrangements;
risks associated with actual or threatened terrorist attacks;
costs of compliance with the Americans with Disabilities Act and other similar laws;
potential liability for uninsured losses and environmental contamination;
risks associated with climate change and severe weather events, as well as the regulatory efforts intended to reduce the effects of climate change;
risks associated with security breaches, incidents, and compromises through cyber attacks,cyber-attacks, cyber intrusions or otherwise, as well as other significant disruptions of our information technology (IT) networks and related systems, which support our operations and our buildings;
risks associated with legal proceedings and other claims that could result in substantial monetary and other costs;
risks associated with BXP’s potential failure to qualify as a REIT under the Internal Revenue Code of 1986, as amended;
possible adverse changes in tax and environmental laws;
the impact of newly adopted accounting principles on our accounting policies and on period-to-period comparisons of financial results;
risks associated with possible state and local tax audits; and
risks associated with our dependence on key personnel whose continued service is not guaranteed.

The risks set forth above are not exhaustive. Other sections of this report mayinclude additional factors that could adversely affect our business and financial performance. Moreover, we operate in a very competitive and rapidly changing environment. New risk factors emerge from time to time and it is not possible for management to predict all risk factors, nor can we assess the impact of all risk factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. Given these risks and uncertainties, investors should not place undue reliance on forward-looking statements as a prediction of actual results. Investors should also refer to our most recent Annual Report on Form 10-K and Quarterly Reports on Form 10-Q for future periods and Current Reports on Form 8-K as we file them with the SEC, and to other materials we may furnish to the public from time to time through Current Reports on Form 8-K or otherwise, for a discussion of risks and uncertainties that may cause actual results, performance or achievements to differ materially from those expressed or implied by forward-looking statements. We expressly disclaim any responsibility to update any forward-looking statements to reflect changes in underlying assumptions or factors, new information, future events, or otherwise, and you should not rely upon these forward-looking statements after the date of this report.
Overview
BXP is one of the largest publicly traded office real estate investment trusts (REITs) (based on total market capitalization as of September 30, 2023)March 31, 2024) in the U.S. that develops, owns, and manages primarily premier workplaces. Our properties are concentrated in six dynamic gateway markets in the U.S. - Boston, Los Angeles, New York, San Francisco, Seattle, and Washington, DC. BPLP is the entity through which BXP conducts substantially all of its business and owns (either directly or through subsidiaries) substantially all of its assets. We generate revenue and cash primarily by leasing premier workplaces to our clients. When making leasing decisions, we consider, among other things, the creditworthiness of the client and the industry in which it conducts business, the length of the lease, the rental rate to be paid at inception and throughout the lease term, the amount of any security deposit or letter of credit posted by the client, the costs of tenant improvements, free rent periods and other landlord concessions, anticipated operating expenses and real estate taxes, current and anticipated vacancy in our
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properties and the market overall (including sublease space), current and expected future demand for the space, the impact of other clients’ expansion rights, and general economic factors.
We believe the key competitive advantages for BXP are our commitment to the office asset class and to our clients as many competitors disinvest in the sector, a strong balance sheet with access to capital in the secured and unsecured debt and private equity markets, and one of the highest quality portfolios of premier workplaces in the
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U.S. assembled over several decades of intentional development, acquisitions, and dispositions. Today, clients and their advisors are more focused than ever on these attributes for their building owners, which distinguishes BXP among its competitors.
Our core strategy has always been to develop, acquire and manage premier workplaces in gateway markets with high barriers-to-entry and attractive demand drivers, and to focus on executing long-term leases with financially strong clients. Our client base isclients that are diverse across market sectors.
This strategy is more valuable than ever as our clients are interested in premier workplaces in vibrant, amenitized, accessible and high demand workplaces to encourage more in-person work. This interest has resulted in the acceleration of flight to quality in the office industry. Over the past several years, BXP’s experience and performance has diverged from the larger market and media sentiment, as premier workplaces have outperformed the broader office market consistently and substantially. We believe this divergence validates our strategy and differentiates BXP from other office companies. Although overall leasing demand has still not returned to pre-pandemic levels, premier workplaces in our five traditional central business district (“CBD”) markets (Boston, New York, San Francisco, Seattle, and Washington, DC) have consistently outperformed the broader office market in those CBDs since the first quarter of 2021 on several key metrics, including occupancy, net absorption levels and rental rates. This outperformance is evident in BXP’s portfolio where approximately 89% of our share of net operating income (“NOI”) comes from assets located in CBDs that are predominantly premier workplaces. These CBD assets are 91.0% occupied and 92.8% leased (including vacant space for which we have signed leases that have not yet commenced in accordance with generally accepted accounting principles (“GAAP”)) as of the end of the first quarter of 2024. For a detailed discussion of our share of NOI, including the reasons management believes the metric is useful to investors and a reconciliation to the most comparable GAAP measure, see page 31.
As of September 30, 2023,March 31, 2024, the weighted-average remaining lease term (1) for our in-place leases, based on square feet, including those signed by our unconsolidated joint ventures but excluding residential units, was approximately 7.6 years. The weighted-average remaining lease termyears, and (2) for our 20 largest clients, based on leased square footage,feet, was approximately 10.5 years as of September 30, 2023.10.4 years.
To be successful in any leasing environment, we believe we must consider all aspects of the client-landlord relationship.In this regard, we believe that our competitive leasing advantage is based on the following attributes:
our understanding of our client’s short- and long-term space utilization and amenity needs in the local markets;
our track record of developing and operating premier workplaces in a sustainable and responsible manner;
our reputation as a high-quality developer, owner and manager of premier workplaces in our markets;
our financial strength, andincluding our ability to fund our share of lease obligations and maintain highpremier building standards; and
our relationships with local brokers.
Outlook
DespiteTwo of the most significant external forces impacting BXP’s performance are interest rates and corporate earnings. We believe lower interest rates would improve our cost of capital, spark more transaction activity and investment opportunities in our sector, reduce the cost of new development and be a tailwind for our client’s earnings growth. Greater corporate earning would, in turn, likely encourage our clients to increase their office space requirements. However, with inflation increasing at greater than expected rates, the Federal Reserve having increasedhas stated that it expects to delay interest rate cuts.
Our clients generally do not hire new employees and increase their office space requirements unless their earnings are growing or they are in need of additional employees to grow their earnings. From 2011 to present, S&P 500 earnings grew around 12% per year, but in 2023 the discountgrowth rate to 5.25%was 0% and the 10-year U.S. Treasury having risen nearly 3% since Marchin 2022 it was 5%. Though the U.S. economy’s headline statistics remain stable with GDP growth at 4.9% ineconomy is growing, and unemployment remains low, only approximately 7% of the third quarter, 150,000 jobs created in October, and the unemployment rate slightly increasedfirst quarter of 2024 were in office using categories compared to 3.9%the long-term average of over 25%. However, this economic picture may not accurately reflect the market tone and operating environment for many of our clients. Assuming forecasts for negative earnings growthGrowth in the third quarter are accurate, the S&P 500 annual earnings growthare projected to be 11% to 13% per annum over the next two years, which should be constructive to BXP’s leasing activity. Many technology clients, a critically important sector that drove space demand following the Great Financial Crisis, overcommitted to space during the pandemic which has been negative forexacerbated the last four quarters. We believe muchsupply-demand imbalance. Over the longer term, we expect earnings at technology companies will grow and they will begin to absorb the available supply.
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Table of the recent strength in the GDP has been consumption related, and job creation has been in the leisure and hospitality, healthcare, education, and government sectors; not the office using sectors, such as information and financial services. Our clients are corporations that actively manage their headcount and operating expenses in times of weak or negative earnings growth. As a result, they are taking more time to make leasing decisions, leasing less space, offering space they have for sublease or taking a combination of one or more of the foregoing actions. This has contributed to the slower leasing volume in 2023 compared to last year. Contents
Although remote work continues to be a factor restraining demand for office space, we believe economic conditions are the primary driver of our slower leasing activity in 2023, and we expect leasing activity will rebound whenactivity. As overall earnings growth returns.
We believe the sentiment surrounding return-to-officefor our clients and the effects onpotential clients improves, it should lead to employment growth and demand for office buildings is worse than the reality of what BXP is experiencing. We continue to be encouraged with the return-to-office trajectoryspace over time. However, we are experiencing innot counting on a near-term market recovery to maintain BXP’s occupancy. Our leasing, construction and property management teams will lean on our buildingsoperating prowess to gain new clients and market share as well as the commentary and actions of many of our clients with respect to their in-person work policies. Several large companies have notified their employees that their attendance in office will be included in performance reviews and that employees who already have received approval for remote work may now have that status reevaluated. A primary tool used by companies to increase attendance is to provide modern workspaces with amenities in an easily commutable location, the definition of achoose premier workplace. As a result, the premier workplace segment, which we operate in, continues to outperform the broader office market, in both vacancy and net absorption, as companies see an opportunity to upgrade their workplaces as a method of attracting their workforces back to the office and recruiting new employees.
Throughout our portfolio, there has been a slow but steady increase in the number of unique occupants that are in our offices each month. As of mid-October 2023, building-census data (based on turnstile information availablesound financial condition for approximately half of our portfolio) and space utilization data indicate that our clients are indeed using their spaces at least multiple days a week (primarily Tuesday through Thursday). We believe this data, coupled with continued efforts from employers to implement mandatory in-office policies, makes it challenging for clients to reduceoffice space.

The evolving operating environment impacts various aspects of our operating activities as:
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labor market conditions shift, resulting in increasingwhich has gradually increased employer demandsdemand for mandatory in-person workdays;
volatility in the capital markets have drivenhas led companies to be more reticent in their capital outlays, including capital required for leasing new space;
our capital costs have increased due to higher interest rates and credit spreads, and private market debt financing, both for construction and existing assets, is significantly more challenging to arrange; and
construction costs have increased and, although mostmuch of the cost for our active development pipeline is fixed, the cost of potential future construction activity continues to increase.
In light of the foregoing,uncertain trajectory of the U.S. and global economies, we believe we continue to position BXP for success notwithstanding the uncertain trajectory of the U.S. and global economies, by increasing liquidity, managing our leverage, pursuing additional capital raising opportunities and maintaining discipline in discretionary capital expenditures, while continuing to selectively invest (including through both acquisitions and developments) in premier workplace opportunities. We remain focused on the following strategies:
continuing to embrace our leadership position in the premier workplace segment and leveraging our strength in portfolio quality, client relationships, development skills, market penetration and sustainability to profitably build market share. Premier workplaces, the preferred choice for our current and prospective clients, are gaining market share compared to general office space and continue to demonstrate the highest occupancy, net absorption levels and rental rates in the central business districts (“CBDs”) in markets where we operate;share;
leasing available space in our in-service and development properties, as well as proactively focusing on future lease expirations;
completing the construction and leasing of our development properties;
pursuing attractive asset class adjacencies where we have a track record of success, such as life sciences and residential development;
continuing to raise the bar in the quality of our portfolio and actively recycling capital by selling assets, subject to market conditions, which have been, and may continue to be, negatively impacted by a slowdown in the capital markets, elevated interest rates, and the limited availability of private market debt financing;
actively managing our operations in a sustainable and responsible manner; and
prioritizing risk management by actively managing liquidity, investing more extensively with joint venture partners to manage our debt levels, and being highly selective in new investment commitments.
The following is an overview of leasing and investment activity in the thirdfirst quarter of 20232024 and recent business highlights.
Leasing Activity and Occupancy
In the third quarter of 2023, we signed a total of approximately 1.06 million square feet of leases with a weighted-average lease term of approximately 8.2 years. This is the second consecutive quarter that leasing has increased, underscoring the demand for premier workplaces, despite the challenging market.
The overall occupancy of our in-service premier workplace and retail properties was 88.8% at September 30, 2023, an increase of 50 basis points from June 30, 2023. We define occupancy as space with signed leases for which revenue recognition has commenced in accordance with GAAP. Including vacant space for which we have signed leases that have not yet commenced in accordance with GAAP, our in-service premier workplace and retail properties were approximately 90.4% leased at September 30, 2023.
The macroeconomic environment has resulted in softening demand in all of our markets. While property tours continue and leases under negotiation move forward, there is less urgency from clients to make new commitments. Potential clients touring space acknowledge that economic uncertainty is impacting space decisions. We have factoredAlso impacting clients decisions are the building quality as well as the financial stability and long-term commitment of their building owners, both strong competitive advantages for BXP.
In the first quarter of 2024, we executed 61 leases totaling approximately 900,000 square feet with a weighted-average lease term of approximately 11.6 years, compared to approximately 660,500 square feet of leases executed in the impacts of a slower economy, softer business performance, and reduced demand for space into our leasing expectations for the remainder of 2023. We expect the bulk of our leasing in the lastfirst quarter of 2023 will continue to come from small-with a weighted-average lease term of approximately 7.7 years.
BXP’s CBD portfolio of premier workplaces was 91.0% occupied and medium-sized professional and financial services firms.92.8% leased (including vacant space for which we have signed leases that have not yet commenced in accordance with GAAP) at March 31, 2024.
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Approximately 89% of our share of NOI comes from assets located in our CBD portfolio, underscoring the strength of BXP’s strategy to invest in the highest quality buildings in dynamic urban gateway markets. For a detailed discussion of our share of NOI, including the reasons management believes the metric is useful to investors and a reconciliation to the most comparable GAAP measure, see page 31.
The overall occupancy of our in-service office and retail properties was 88.2% at March 31, 2024, a decrease of 20 basis points from December 31, 2023. We define occupancy as space with signed leases for which revenue recognition has commenced in accordance with GAAP. Including vacant space for which we have signed leases that have not yet commenced revenue recognition in accordance with GAAP, our in-service office and retail properties were approximately 89.9% leased at March 31, 2024.
Investment Activity
We continually evaluate currentremain in active pursuit of opportunities in our core markets and prospective markets for possible acquisitionsasset types with primarily two types of “value-add”counterparties: lenders to highly leveraged assets that require lease-up or repositioning,recapitalization and acquisitionsinstitutional owners seeking to diversify from the office asset class. To date, there has been limited market transaction activity for higher-quality office assets. With lenders, there are fewer premier workplaces that are otherwise consistentstruggling with our long-term strategy of owning, managing, developing,leverage, and improvingin the few cases involving premier workplaces, lenders are generally electing to extend loans to borrowers who agree to invest modestly in each oftheir assets. Institutional owners are less interested in selling their higher quality assets, and there remains a material bid-ask spread given assets have in most cases not been marked down to market clearing levels. Notwithstanding these current challenges, our chosen markets. We expect opportunities to make acquisitionsexpectations are that transactions and our investment activity will increase in this environment,coming quarters given the volume of maturing financings, continued mark downs in institutional portfolios and we remain committed to developing and acquiring assets to enhance our long-term growth and to meet current and future client demandprolonged high interest rates. We also have interest from institutional investors in co-investing with us for premier workplaces, life sciences, and residential development.select opportunities.
Consistent with this strategy, on January 8, 2024, we entered into acompleted the acquisition of our joint venture agreementpartner’s 50% economic ownership interest in the joint venture that owns 901 New York Avenue located in Washington, DC for a purchase price of $10.0 million and recorded a gain on consolidation of approximately $21.8 million. This transaction was sparked by our partner’s election to reduce their exposure to the office sector, and we agreed to purchase their interest on attractive terms. The property is encumbered by an approximately $207.1 million mortgage debt, at acquisition, which bears interest at 3.61% per annum and matures on January 5, 2025. Following the acquisition, we modified the mortgage loan to provide for two loan extension options totaling five years of additional term, each subject to certain conditions. The first loan extension option is for four years at a fixed interest rate of 5.0% per annum. We also extended an approximately 200,000 square foot lease with the anchor client through 2042 after the acquisition. 901 New York Avenue is a premier workplace consisting of approximately 524,000 net rentable square feet.
Also, on March 21, 2024, we completed the previously announced sale of a 45% interest in 290 Binney Street, a life sciences development located in Kendall Square in Cambridge, Massachusetts, to an institutional investor forinvestor. The institutional investor’s investment in 290 Binney Street will reduce our share of the futureproject’s estimated development spend over time by approximately $533.5 million, including $141.8 million that was funded at closing. The consummation of 343 Madison Avenue located on Madison Avenue between 44ththis joint venture completed the institutional investor’s two-building investment in Cambridge, Massachusetts with a gross valuation of approximately $1.66 billion or $2,050 per square foot. The properties, 290 Binney Street and 45th Streets in New York City, New York adjacent to Grand Central Station.300 Binney Street, total 802,000 net rentable square feet and are 100% pre-leased. We ownretain a 55% interest in theeach joint venture and our partner owns a 45% interest, and we will provide customary development, property management, and leasing services. The 343 Madison Avenue project contemplates the construction of (1) a direct entrance to the Long Island Railroad’s new east side access project (Grand Central Madison) (“Phase 1”) and (2) an approximately 900,000 square foot premier workplace building with ground floor retail (“Phase 2”). The joint venture executed an up to 99-year ground lease with the Metropolitan Transportation Authorityservices for the approximately 25,000 square foot site. The ground lease requires the joint venture to construct Phase 1 of the development project. The joint venture has the option until July 31, 2025 to terminate the ground lease prior to construction of the new building and receive reimbursement of up to $117.0 million for the cost of the construction of Phase 1. There can be no assurance that Phase 1 will be completed on the terms currently contemplated or that Phase 2 of the development project will commence on the terms and schedule currently contemplated or at all.
A joint venture in which we owned a 20% equity interest (with an institutional investor owning the remaining 80%) completed a restructuring of the ownership in Metropolitan Square, which resulted in (i) an affiliate of the existing mezzanine lender purchasing the property, and (ii) us becoming a co-lender of up to $20.0 million under a new $100.0 million mezzanine loan. The transaction also resulted in, among other things, (i) the cessation of our obligation to fund future investments through our then 20% equity interest, which caused us to recognize a third quarter gain on investment of approximately $35.8 million related to our deficit investment balance, and (ii) the removal of the property from our in-service portfolio. Prior to the restructuring, the property was encumbered by an aggregate of $420.0 million of debt, consisting of a senior loan with an outstanding principal balance of $305.0 million senior loan and the existing $115.0 million mezzanine loan. The new mezzanine loan, which is subordinate only to the senior loan, may be drawn upon for future lease-up, operating and other costs on an as needed basis, and amounts borrowed will bear interest at a per annum rate of 12%, compounded monthly. In addition, we will continue to provide property management and leasing services to the property with the potential to earn additional incentive fees. Metropolitan Square is an approximately 657,000 square foot premier workplace located at 655 15th Street, NW in the heart of downtown Washington, DC.ventures.
As of September 30, 2023,March 31, 2024, our development/redevelopment pipeline consisted of 11 properties that, when completed, we expect will total approximately 2.83.2 million net rentable square feet. Our share of the estimated total cost for these projects is approximately $2.4$2.6 billion, of which approximately $1.4 billion remains to be invested. The commercial space in the pipeline, which excludes Skymark (formerly Reston Next Residential), is 52%the residential projects, was 54% pre-leased as of October 30, 2023.
In the third quarter of 2023, we completed and fully placed in-service two development projects:
140 Kendrick Street - Building A, an approximately 104,000 square foot property in Needham, Massachusetts. 140 Kendrick is the first Net Zero, Carbon Neutral office repositioning of its scale in Massachusetts. The property is 100% leased.
751 Gateway, an approximately 231,000 square foot laboratory/life sciences property in South San Francisco, California in which BXP has a 49% interest. The property is 100% leased.May 2, 2024.
As we continue to focus on new investments to drive future growth, we regularly review our portfolio to identify properties as potential sales candidates that either no longer fit within our portfolio strategy or could attract premium pricing in the current market. However, the asset sale market for all real estate asset classes has slowed dramatically with the increase inwhile interest rates remain elevated and transaction volume for office assets continues to be minimal in the U.S.
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A brief overview of each of our markets follows.
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Boston
During the thirdfirst quarter of 2023,2024, we executed approximately 440,000178,000 square feet of leases and approximately 365,000435,000 square feet of leases commenced in the Boston region. Approximately 140,000374,000 square feet of the leases that commenced had been vacant for less than one year and represent an increase in net rental obligations of approximately 14%21.4% over the prior leases.
As of September 30, 2023,March 31, 2024, our approximately 8.3 million square foot Boston CBD in-service portfolio was approximately 95.6%94.7% occupied and approximately 96.4%95.9% leased (including vacant space for which we have signed leases that have not yet commenced in accordance with GAAP).
Our approximately 2.5 million square foot in-service premier workplace CBD portfolio in Cambridge was approximately 97.2%97.4% occupied and leased (including vacant space for which we have signed leases that have not yet commenced in accordance with GAAP) as of September 30, 2023.March 31, 2024.
As of September 30, 2023,March 31, 2024, our Route 128-Mass Turnpike in-service portfolio is comprised of approximately 4.94.7 million square feet and was approximately 79.2%79.3% occupied and approximately 80.2%79.4% leased (including vacant space for which we have signed leases that have not yet commenced in accordance with GAAP).
Los Angeles
Our Los Angeles (“LA”) in-service portfolio of approximately 2.3 million square feet is currently focused in West LA and includes Colorado Center, an approximately 1.1 million square foot property of which we own 50%, and Santa Monica Business Park, a 21-building, approximately 1.2 million square foot property of which we own 55%.property. As of September 30, 2023,March 31, 2024, our LA in-service properties were approximately 85.9%86.1% occupied and 87.6%87.2% leased (including vacant space for which we have signed leases that have not yet commenced in accordance with GAAP).
During the third quarter of 2023, we executed approximately 100,000 square feet of leases and approximately 70,000 square feet of leases commenced in the Los Angeles region. Approximately 69,000 square feet of the leases that commenced had been vacant for less than one year and represent an increase in net rental obligations of approximately 1.5% over the prior leases.
New York
During the thirdfirst quarter of 2023,2024, we executed approximately 240,000225,000 square feet of leases in the New York region and approximately 374,000313,000 square feet of leases commenced. Approximately 180,000269,000 square feet of the leases that commenced had been vacant for less than one year and they represent a decreasean increase in net rental obligations of approximately 11%10.5% over the prior leases. As of September 30, 2023,March 31, 2024, our New York CBD in-service portfolio was approximately 92.1%91.5% occupied and approximately 92.8%95% leased (including vacant space for which we have signed leases that have not yet commenced in accordance with GAAP).
San Francisco
During the thirdfirst quarter of 2023,2024, we executed approximately 52,000109,000 square feet of leases and approximately 406,000175,000 square feet of leases commenced in the San Francisco region. Approximately 127,00098,000 square feet of leases that commenced had been vacant for less than one year and represent a decreasean increase in net rental obligations of approximately 2%10.0% over the prior leases.
As of September 30, 2023,March 31, 2024, our San Francisco CBD in-service properties were approximately 89.3%86.6% occupied and approximately 90.3%87.4% leased (including vacant space for which we have signed leases that have not yet commenced in accordance with GAAP).
Client demand in the San Francisco CBD had increased more than 50% since the fourth quarter of 2022 with new technology demand responsible for much of the increase. Growth from the artificial intelligence (“AI”) organizations in San Francisco is particularly noteworthy with billions of dollars of recent investment into this growing ecosystem and a number of these AI companies actively considering space. Given the potential and recent growth of these organizations, we would expect this demand to center on the well-built technology sublet space that is readily available in the San Francisco market. San Francisco is the leading labor market for AI jobs followed by New York and Seattle. New venture capital investment in AI is concentrated in San Francisco, New York and Boston according to CBRE Insights, with San Francisco receiving the majority of the investment. These are encouraging facts that could be constructive to the recovery of the San Francisco office market, if they come to fruition.
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Seattle
Our Seattle in-service portfolio includes Safeco Plaza, an approximately 779,000769,000 square foot property of which we own 33.67%, and Madison Centre, an approximately 755,000 square foot property. As of September 30, 2023, our SeattleMarch 31, 2024, these in-service properties were approximately 84.7%81.8% occupied and approximately 87.6%83.1% leased (inclusive of vacant space with signed leases that have not yet commenced in accordance with GAAP). During the third quarter of 2023, we executed approximately 127,000 square feet of leases in the Seattle region.
Washington, DC
During the thirdfirst quarter of 2023,2024, we executed approximately 100,000336,000 square feet of leases and approximately 350,000438,000 square feet of leases commenced in the Washington, DC region. Approximately 272,000256,000 square feet of the leases that commenced had been vacant for less than one year and represent a decrease in net rental obligations of approximately 16%4.7% over the prior leases.
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As of September 30, 2023,March 31, 2024, our Washington, DC CBD in-service properties were approximately 83.8%86.7% occupied and approximately 89.1%88.9% leased (inclusive of vacant space with signed leases that have not yet commenced in accordance with GAAP).
A significant component of our Washington, DC regional portfolio is in Reston Town Center, an award-winning mixed-use development in Northern Virginia. Reston is a hub for technology, cloud services, cybersecurity and defense intelligence companies. As of September 30, 2023,March 31, 2024, our Reston Virginia properties wereCBD portfolio was approximately 88.6%93.7% occupied and approximately 94.0%95.6% leased (inclusive of vacant space with signed leases that have not yet commenced in accordance with GAAP).
Leasing Statistics
The table below details the leasing activity, including 100% of the unconsolidated joint ventures, that commenced revenue recognition during the three and nine months ended September 30, 2023:March 31, 2024:
Three months ended September 30, 2023Nine months ended September 30, 2023
(Square Feet)
Vacant space available at the beginning of the period5,802,761 5,610,777 
Property dispositions/properties taken out of service (1)(289,204)(622,481)
Properties placed (and partially placed) in-service (2)334,758 516,355 
Leases expiring or terminated during the period1,205,603 3,367,146 
Total space available for lease7,053,918 8,871,797 
1st generation leases
380,519 531,606 
2nd generation leases with new clients
632,026 1,620,339 
2nd generation lease renewals
552,423 1,230,902 
Total space leased (3)1,564,968 3,382,847 
Vacant space available for lease at the end of the period5,488,950 5,488,950 
Leases executed during the period, in square feet (4)1,055,781 2,653,797 
Second generation leasing information: (5)
Leases commencing during the period, in square feet1,184,449 2,851,241 
Weighted Average Lease Term81 Months86 Months
Weighted Average Free Rent Period190 Days185 Days
Total Transaction Costs Per Square Foot (6)$89.81 $76.09 
Increase (Decrease) in Gross Rents (7)(3.34)%0.58 %
Increase (Decrease) in Net Rents (8)(5.61)%0.59 %
Three months ended March 31, 2024
(Square Feet)
Vacant space available at the beginning of the period5,696,007 
Vacant space from property dispositions/properties taken out of service (1)(233,694)
Vacant space from properties placed (and partially placed) in-service (2)44,652 
Leases expiring or terminated during the period1,684,796 
Total space available for lease7,191,761 
1st generation leases
171,991 
2nd generation leases with new clients
414,732 
2nd generation lease renewals
846,432 
Total space leased (3)1,433,155 
Vacant space available for lease at the end of the period5,758,606 
Leases executed during the period (4)893,941 
Second generation leasing information: (5)
Leases commencing during the period, in square feet1,261,164 
Weighted Average Lease Term110 Months
Weighted Average Free Rent Period93 Days
Total Transaction Costs Per Square Foot (6)$79.32 
Increase in Gross Rents (7)6.78 %
Increase in Net Rents (8)9.62 %
 __________________
(1)Total vacant square feet of properties taken out of service during the three months ended September 30, 2023March 31, 2024 consists of 289,204162,274 square feet at Metropolitan Square (See Notes 51050 Winter Street and 14 to the Consolidated Financial
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Statements). Total vacant square feet of properties taken out of service during the nine months ended September 30, 2023 consists of 289,20471,420 square feet at Metropolitan Square, 195,191 square feet at 300 Binney Street, 55,852 square feet at 420 Bedford Street, 57,045 square feet at 430 Bedford Street and 25,189 square feet at 2098 Gaither15825 Shady Grove Road.
(2)Total vacant square feet of properties placed in service(and partially placed) in-service during the three months ended September 30, 2023March 31, 2024 consists of 230,59244,652 square feet at 751 Gateway and 104,166 square feet at 140 Kendrick Street - Building A. Total vacant square feet of properties placed in service during the nine months ended September 30, 2023 consists of 230,592 square feet at 751 Gateway, 104,166 square feet at 140 Kendrick Street - Building A, and 181,597 square feet at 2100 Pennsylvania Avenue.651 Gateway.
(3)Represents leases for which lease revenue recognition has commenced in accordance with GAAP during the three and nine months ended September 30, 2023March 31, 2024.
(4)Represents leases executed during the three and nine months ended September 30, 2023March 31, 2024 for which we either (1) commenced lease revenue recognition in such period or (2) will commence lease revenue recognition in subsequent periods, in accordance with GAAP, and includes leases at properties currently under development. The total square feet of leases executed and recognized during the three and nine months ended September 30, 2023 are 189,541 and 492,669March 31, 2024 is 354,567 square feet, respectively.feet.
(5)Second generation leases are defined as leases for space that we have previously leased. Of the 1,184,449 and 2,851,2411,261,164 square feet of second generation leases that commenced during the three and nine months ended September 30, 2023, respectively,March 31, 2024, leases for 1,024,020 and 2,389,495906,597 square feet respectively, were signed in prior periods.
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(6)Total transaction costs include tenant improvements and leasing commissions but exclude free rent concessions and other inducements in accordance with GAAP.
(7)Represents the increase (decrease) in gross rent (base rent plus expense reimbursements) on the new versus expired leases on the 789,077 and 1,849,0171,053,391 square feet of second generation leases that had been occupied within the prior 12 months for the three and nine months ended September 30, 2023, respectively;March 31, 2024; excludes leases that management considers temporary because the client is not expected to occupy the space on a long-term basis.
(8)Represents the increase (decrease) in net rent (gross rent less operating expenses) on the new versus expired leases on the 789,077 and 1,849,0171,053,391 square feet of second generation leases that had been occupied within the prior 12 months for the three and nine months ended September 30, 2023, respectively.March 31, 2024.
Transactions during the three months ended September 30, 2023March 31, 2024 included the following:
Development/Redevelopment activitiesAcquisition activity
On July 20, 2023,January 8, 2024, we completed and fully placed in-service 140 Kendrick Street - Building A,the acquisition of our joint venture partner’s 50% economic ownership interest in the joint venture that owns 901 New York Avenue, located in Washington, DC. At acquisition, the total net equity acquired was $20.0 million, which includes $10.0 million in cash that we paid for the joint venture partner's 50% economic ownership interest in the joint venture. The property is subject to existing mortgage indebtedness of approximately $207.1 million (See Debt activities below). The acquisition resulted in us recording a gain upon consolidation of approximately $21.8 million, which is the difference between the fair value of the previously held equity method investment immediately prior to the consolidation of $10.0 million, less our costs basis of approximately $(11.8) million. The gain on consolidation is included within income (loss) from unconsolidated joint ventures in the Consolidated Statement of Operations. 901 New York Avenue is a premier workplace redevelopment project withconsisting of approximately 104,000524,000 net rentable square feet located in Needham, Massachusetts. The property is the first Net Zero, Carbon Neutral office repositioning of its scale in Massachusetts.feet.
Development activity
On September 26, 2023,February 12, 2024, we partially placed in-service 180 CityPoint, ancommenced the development of a residential project at 121 Broadway Street in Cambridge, Massachusetts that is adjacent to our development projects at 290 Binney Street and 300 Binney Street. 121 Broadway will consist of 439 residential units aggregating approximately 329,000492,000 net rentable square feet laboratory/life sciences projectfeet.
Impairment activity
At March 31, 2024, we evaluated the expected hold period for a portion of our Shady Grove property located in Waltham, Massachusetts.Rockville, Maryland. Based on a shorter-than-expected hold period, we reduced the carrying value of a portion of the property that we anticipate selling to a third party developer to its estimated fair value at March 31, 2024. As a result, each of BXP and BPLP recognized an impairment loss of approximately $13.6 million. Our estimated fair value was based on Level 3 inputs as defined in Accounting Standards Codification (“ASC”) 820 “Fair Value Measurements and Disclosures” (“ASC 820”) and on a pending offer from a third party.
Ground Lease activity
On August 1, 2023,March 28, 2024, we entered into a consolidated joint venture in which we have a 55% interest executed an up to 99-year ground90-year air rights lease with the MetropolitanMassachusetts Department of Transportation Authority for an approximately 25,00061,000 square footfeet site at the 343 Madison Avenueparking garage located at 100 Clarendon Street and the concourse level of the Massachusetts Bay Transportation Authority’s Back Bay Station (the “Station”). The lease requires annual base rental payments of $250,000 until the commencement of construction, as defined in the lease. If we commence construction of a project on the site on or before August 1, 2028 then a final fixed rental payment is due in New York City (see Notes 4accordance with the lease at that time. After August 1, 2028, if we commence construction of a project on the site, then a final rental payment based on the then current fair market value will be due at that time. In addition, the lease requires annual payments of $500,000 through 2033 to fund maintenance and 9improvements to the Consolidated Financial Statements).Station. We have assumed that we will begin construction on the site on or before August 1, 2028. The 343 Madison Avenue project contemplates the constructionincremental borrowing rate for this lease is 6.57% per annum. The net present value of (1) a direct entrance to the Long Island Railroad’s new east side access project (Grand Central Madison) (“Phase 1”) and (2) an approximately 900,000 square foot premier workplace building with ground floor retail (“Phase 2”). The joint venture has the option until July 31, 2025 to terminate the ground lease prior to constructionpayments is approximately $23.2 million. We classify this lease as an operating lease. As a result, we recorded a Right of the new buildingUse Assets – Operating Leases and receive reimbursementLease Liabilities – Operating Leases of up to $117.0approximately $23.9 million for the costand $23.2 million, respectively, on our Consolidated Balance Sheets as of the construction of Phase 1. We are reasonably certain that we will not exercise this termination option as we completed a long-term competitive process to obtain the right to groundMarch 31, 2024. There were no lease this site. There is no rent due under the ground leasecosts for the period from August 1, 2023March 28, 2024 through JulyMarch 31, 2028, with the exception of a payment of approximately $21.8 million that is due on July 31, 2025. Beginning August 1, 2028, the lease requires rent of approximately $10.9 million per year with adjustments every five years, with a minimum increase of 110% of the ground rent from the prior year. The lease required the joint venture to pay a non-refundable deposit totaling $25.0 million. There can2024.
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be no assurance that Phase 1 will be completed on the terms currently contemplated or that Phase 2 of the development project will commence on the terms and schedule currently contemplated or at all.
Unconsolidated joint venture activities
On July 28, 2023,January 2, 2024, a joint venture in which we have a 50% interest modifiedpartially placed in-service 651 Gateway, an approximately 327,000 net rentable square foot laboratory/life sciences project in South San Francisco, California. The property is approximately 21% pre-leased as of May 2, 2024.
On January 8, 2024, we acquired our joint venture partner’s 50% economic ownership interest in the joint venture that owns 901 New York Avenue, located in Washington, DC, for a gross purchase price of $10.0 million in cash (See Acquisition activity above). Prior to the acquisition, we had a 50% economic ownership interest in the joint venture and exercised an option to extend by one yearaccounted for it under the equity method of accounting. The acquisition resulted in us having full ownership of the joint venture such that we now account for the assets, liabilities, and operations of it on a consolidated basis in our financial statements instead of under the equity method of accounting and as a result recognized a gain on consolidation of approximately $21.8 million.
On February 6, 2024, a joint venture in which we own a 25% interest extended the maturity date of itsthe loan collateralized by 100 Causeway Street.its 3 Hudson Boulevard property. The extended loan continues to bear interest at a variable rate equal to Term SOFR plus approximately 3.61% per annum and matures on May 9, 2024. At the time of the modification and extension, the loan had an outstanding balance totaling approximately $340.6$80.0 million bore interest at Term SOFR plus 1.60% per annum, and was scheduled to mature on September 5, 2023. Following the modification and extension, the loan had an outstanding balance of $336.6 million, which included an approximately $4.0 million principal repayment, bears interest at Term SOFR plus 1.48% per annum, and matures on September 5, 2024, with an additional one-year extension option, subject to certain conditions. 100 Causeway Street is an approximately 634,000 square foot premier workplace located in Boston, Massachusetts and is approximately 95% leased.
On August 11, 2023, a joint venture in which we have a 25% interest exercised its second extension option of 180-days collateralized by 3 Hudson Boulevard. The extended loan now matures on February 9, 2024. As of September 30, 2023, the loan had approximately $25.6 million of accrued interest due at the maturity date. 3 Hudson Boulevard consists of land and improvements held for future development located in New York, New York.
On September 1, 2023,February 9, 2024, a joint venture in which we have a 49% interest completed and fully placed in-service 751 Gateway, an approximately 231,000 square foot laboratory/life sciences project in South San Francisco, California. The property is 100% leased.
On September 6, 2023, a joint venture in which we haveown a 50% interest modifiedexercised an option to extend the maturity date of the construction loan collateralized by its Hub7750 Wisconsin Avenue property. The construction loan had a total commitment amount of approximately $252.6 million. The extended loan continues to bear interest at a variable rate equal to Term SOFR plus 1.35% per annum and matures on Causeway - Podium property.April 26, 2025. At the time of the modification,extension, the loan had an outstanding balance totaling approximately $251.6 million and was scheduled to mature on April 26, 2024. 7750 Wisconsin Avenue is a premier workplace with approximately 736,000 net rentable square feet located in Bethesda, Maryland.
Debt activities
On January 8, 2024, we acquired our joint venture partner’s 50% economic ownership interest in the joint venture that owns 901 New York Avenue located in Washington, DC (See Acquisition activity and Unconsolidated joint venture activities above). The property is subject to existing mortgage indebtedness. At acquisition, the mortgage loan had an outstanding principal balance of approximately $174.3$207.1 million, bore interest at Term SOFR plus 2.35%3.61% per annum and was scheduled to mature on September 6, 2023. FollowingJanuary 5, 2025. The mortgage loan was recorded at a fair value of approximately $198.7 million. On January 11, 2024, we modified the modification, the modifiedmortgage loan had an outstanding balanceto provide for two extension options totaling five years of $154.3 million, which included an approximately $20.0 million principal repayment, bears interest at Daily SOFR plus 2.50% per annum, and matures on September 8, 2025, with a one-year extension option,additional term, each subject to certain conditions. On September 8, 2023, the joint venture entered into interest rate swap contracts with notional amounts aggregating approximately $154.3 million through September 2, 2025, resulting in a fixed interest rate of approximately 7.35% per annum through the expiration of the interest rate swap contracts. The Hub on Causeway - Podium is an approximately 383,000 square foot premier workplace located in Boston, Massachusetts and is approximately 94% leased.
On September 13, 2023, a joint venture in which we owned a 20% equity interest completed the first step of a two-step restructuring of its ownership in Metropolitan Square. The two-step restructuring will result in (i) an affiliate of the existing mezzanine lender purchasing the property and becoming the new property owner and us no longer having an equity interest in the property and (ii) us becoming a co-lender of up to $20.0 million under a new $100.0 million mezzanine loan (“New Mezz Loan”). Prior to the restructuring, the property was encumbered by an aggregate of $420.0 million of debt, consisting of a senior loan with an outstanding principal balance of $305.0 million (“Senior Loan”) and the existing $115.0 million mezzanine loan (“Existing Mezz Loan”). Step one of the restructuring was completed on September 13, 2023, and resulted in, among other things, (i) the cessation of our obligation to fund future investments through our then 20% equity interest, which caused us to recognize a gain on investment of approximately $35.8 million related to our deficit investment balance, which was primarily due to excess distributions, and (ii) the removal of the property from our in-service portfolio. Metropolitan Square is an approximately 657,000 net rentable square foot premier workplace located at 655 15th Street, NW in the heart of downtown Washington, DC. See Note 14 to the Consolidated Financial Statements for a description of step two of the restructuring.
During the three months ended September 30, 2023, we recognized an other-than-temporary impairment loss on our investments in Platform 16, 360 Park Avenue South, 200 Fifth Avenue and Safeco Plaza of approximately $155.2 million, $54.0 million, $33.4 million and $29.9 million, respectively. See Note 5 to the Consolidated Financial Statements.
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Noncontrolling Interest in Property Partnerships activity
On July 28, 2023, we entered into a joint venture agreement with an institutional investor for the future development of 343 Madison Avenue located on Madison Avenue between 44th and 45th Streets in New York City, New York adjacent to Grand Central Station. Prior to the formation of the joint venture, we and the institutional investor were engaged in a collaborative arrangement. We own a 55% interest in the venture and our partner owns a 45% interest, and we will provide customary development, property management, and leasing services. The joint venture partner contributed approximately $4.8 million in cash and $17.5 million in improvements and prepaid ground rent for their 45% ownership interest in the joint venture. We contributed approximately $5.9 million in cash and $21.4 million in improvements and prepaid ground rent for our 55% ownership interest in the joint venture. The transaction did not qualify as a sale of real estate for financial reporting purposes as we continue to effectively control this property and will continue to account for the property on a consolidated basis in our financial statements, see Note 4 to the Consolidated Financial Statements.
Debt activities
On SeptemberFebruary 1, 2023,2024, BPLP completed the repayment of $500.0repaid $700.0 million in aggregate principal amount of its 3.125%3.800% senior notes due SeptemberFebruary 1, 2024. The repayment was completed with available cash and the $600.0 million proceeds from the mortgage loan entered into on October 26, 2023. The repayment price was approximately $507.8$713.3 million, which was equal to the stated principal plus approximately $7.8$13.3 million of accrued and unpaid interest to, but not including, the repayment date. Excluding the accrued and unpaid interest, the repayment price was equal to the principal amount being repaid.
Noncontrolling interest activity
On September 28,March 21, 2024, we completed the sale of a 45% interest in 290 Binney Street in Cambridge, Massachusetts.  The institutional investor funded approximately $97.2 million in cash at closing, which is less than 45% of the agreed upon carrying value of the property immediately prior to the transaction.  The institutional investor will fund all construction costs until its equity balance is proportionate to its ownership percentage, after which we and the institutional investor will fund the development project based on our respective ownership interests.  We retain a 55% ownership interest in the joint venture.  The transaction did not qualify as a sale of real estate for financial reporting purposes as we continue to effectively control the property and thus will continue to account for the property on a consolidated basis in our financial statements and no gain was recognized in the Consolidated Statements of Operations.  We provide customary development, property management and leasing services to the
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joint venture.  290 Binney Street is an approximately 566,000 net rentable square foot laboratory/life sciences development project located in Cambridge, Massachusetts.  The  development project is 100% pre-leased to a life sciences company.  
Transactions completed subsequent to March 31, 2024 included the following:
On April 5, 2024, we completed and fully placed in-service 760 Boylston Street, an approximately 118,000 net rentable square feet retail redevelopment located in Boston, Massachusetts.
On April 16, 2024, BPLP provided notice to exercise its one-year extension option on its $1.2 billion unsecured term loan facility (the “2023 Unsecured Term Loan”). BPLP anticipates effectuating the extension on or prior to the current May 16, 2024 maturity date. Upon effectiveness, the 2023 Unsecured Term Loan will mature on May 16, 2025. After making an approximately $500.0 million optional repayment on April 29, 2024, the 2023 Unsecured Term Loan has an outstanding principal balance of $700.0 million.
On April 17, 2024, BPLP exercisedestablished an unsecured commercial paper program. Under the accordian featureterms of the program, BPLP may issue, from time to time, unsecured commercial paper notes up to a maximum aggregate amount outstanding at any one time of $500 million with varying maturities of up to one year. The notes will be sold in private placements and will rank pari passu with all of BPLP’s other unsecured senior indebtedness, including its $1.5 billionoutstanding senior notes. The commercial paper program is backstopped by available capacity under BPLP's unsecured revolving credit facility (the “2021 Credit Facility”) which allowed. As of May 2, 2024, BPLP to increase the total commitment by up tohad $500.0 million subjectoutstanding under its commercial paper program that bears interest at a weighted-average rate of 5.58% per annum. Proceeds from the commercial paper program were used to syndication ofreduce BPLP’s 2023 Unsecured Term Loan to $700.0 million.
On April 29, 2024, BPLP increased the increase and other conditions (the “Accordion”). BPLP exercised a portion of the Accordion with three new lenders to the 2021 Credit Facility (“New Lenders”). Each of the New Lenders entered into a lender agreement with BPLP to provide an aggregate of $315.0 million in additional revolving credit commitments, which increased thecurrent maximum borrowing amount under the 2021 Credit Facility from $1.5$1.815 billion to $1.815$2.0 billion. All other terms of the 2021 Credit Facility, including its maturity date of June 15, 2026, remain unchanged.
Transactions completed subsequent to September 30, 2023 included the following:
On October 2, 2023, step two of the Metropolitan Square restructuring (see Note 5 to the Consolidated Financial Statements for a description of step one) was completed and included (i) the sale of the property and assignment of the Senior Loan to the new owner, and (ii) the closing of the New Mezz Loan with a maximum principal amount of $100.0 million that is senior to the Existing Mezz Loan and subordinate only to the Senior Loan. The New Mezz Loan may be drawn upon for future lease-up, operating and other costs on an as needed basis, and amounts borrowed will bear interest at a per annum rate of 12%, compounded monthly. We will fund 20%, or up to $20.0 million, of any amounts borrowed BPLP had no borrowings under the New Mezz Loan. In addition, we will continue to provide property management and leasing services to the property with the potential to earn additional incentive fees. Metropolitan Square is an approximately 657,000 square foot premier workplace located at 655 15th Street, NW in the heart2021 Credit Facility as of downtown Washington, DC.May 2, 2024.
On October 26, 2023, we closed on a mortgage loan collateralized by our 325 Main Street, 355 Main Street, 90 Broadway and Cambridge East Garage (also known as Kendall Center Green Garage) properties located in Cambridge, Massachusetts. The mortgage loan, totaling $600 million, requires interest-only payments at Daily Compounded SOFR plus 2.25% per annum until maturity on October 26, 2028.
On November 6, 2023, WeWork Inc. and certain of its direct and indirect subsidiaries (collectively, “WeWork”) filed voluntary petitions to commence proceedings under Chapter 11 of title 11 of the United States Code in the United States Bankruptcy Court for the District of New Jersey. WeWork is a tenant at five of our premier workplaces and leases an aggregate of approximately 493,000 square feet, approximately 0.97% of our in-service portfolio. There can be no assurance that WeWork will not reject one or more of the five leases.

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Critical Accounting Estimates
Management’s Discussion and Analysis of Financial Condition and Results of Operations discuss our Consolidated Financial Statements, which have been prepared in accordance with generally accepted accounting principles (“GAAP”). The preparation of these financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results may differ from those estimates and assumptions.
Our Annual Report on Form 10-K for the year ended December 31, 20222023 contains a discussion of our critical accounting estimates. There have been no significant changes in our critical accounting estimates since the year ended December 31, 2022.2023.
Results of Operations for the NineThree Months Ended September 30,March 31, 2024 and 2023 and 2022
Net income attributable to Boston Properties, Inc. and net income attributable to Boston Properties Limited Partnership decreased byincreased approximately $656.9$2.0 million and $735.0$2.3 million, respectively, for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022,2023, as set forthdetailed in the following tables and for the reasons discussed below under the heading “Comparison of the ninethree months ended September 30, 2023March 31, 2024 to the ninethree months ended September 30, 2022”March 31, 2023” within Item“Item 2—Management’s Discussion and Analysis of Financial Condition and Results of OperationsOperations..
The following are reconciliations of Net Income Attributable to Boston Properties, Inc. to Net Operating Income and Net Income Attributable to Boston Properties Limited Partnership to Net Operating Income for the ninethree months ended September 30, 2023March 31, 2024 and 2022.2023. For a detailed discussion of Net Operating Income (“NOI”), including the reasons management believes NOI is useful to investors, see page 60.51.
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BXP
Nine months ended September 30,
20232022Increase/
(Decrease)
%
Change
(in thousands)
Three months ended March 31,Three months ended March 31,
202420242023Increase/
(Decrease)
%
Change
(in thousands)(in thousands)
Net Income Attributable to Boston Properties, Inc.Net Income Attributable to Boston Properties, Inc.$70,290 $727,144 $(656,854)(90.33)%Net Income Attributable to Boston Properties, Inc.$79,883 $$77,890 $$1,993 2.56 2.56 %
Net Income Attributable to Noncontrolling Interests:Net Income Attributable to Noncontrolling Interests:
Noncontrolling interest—common units of the Operating Partnership
Noncontrolling interest—common units of the Operating Partnership
Noncontrolling interest—common units of the Operating PartnershipNoncontrolling interest—common units of the Operating Partnership8,642 82,821 (74,179)(89.57)%9,500 9,078 9,078 422 422 4.65 4.65 %
Noncontrolling interests in property partnershipsNoncontrolling interests in property partnerships59,337 54,896 4,441 8.09 %Noncontrolling interests in property partnerships17,221 18,660 18,660 (1,439)(1,439)(7.71)(7.71)%
Net IncomeNet Income138,269 864,861 (726,592)(84.01)%Net Income106,604 105,628 105,628 976 976 0.92 0.92 %
Other Expenses:Other Expenses:
Add:Add:
Add:
Add:
Interest expenseInterest expense424,492 317,216 107,276 33.82 %
Loss from unconsolidated joint ventures261,793 1,389 260,404 18,747.59 %
Interest expense
Interest expense161,891 134,207 27,684 20.63 %
Impairment lossImpairment loss13,615 — 13,615 100.00 %
Other Income:Other Income:
Less:Less:
Less:
Less:
Unrealized gain on non-real estate investmentUnrealized gain on non-real estate investment332 — 332 100.00 %
Gains (losses) from investments in securities2,311 (8,549)10,860 127.03 %
Other income - assignment fee— 6,624 (6,624)(100.00)%
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment396 259 137 52.90 %
Gains from investments in securitiesGains from investments in securities2,272 1,665 607 36.46 %
Interest and other income (loss)Interest and other income (loss)48,999 6,151 42,848 696.60 %Interest and other income (loss)14,529 10,941 10,941 3,588 3,588 32.79 32.79 %
Gains on sales of real estate517 381,293 (380,776)(99.86)%
Income (loss) from unconsolidated joint venturesIncome (loss) from unconsolidated joint ventures19,186 (7,569)26,755 353.48 %
Other Expenses:Other Expenses:
Add:Add:
Add:
Add:
Depreciation and amortization expense
Depreciation and amortization expense
Depreciation and amortization expenseDepreciation and amortization expense618,746 551,445 67,301 12.20 %218,716 208,734 208,734 9,982 9,982 4.78 4.78 %
Transaction costsTransaction costs1,970 2,146 (176)(8.20)%Transaction costs513 911 911 (398)(398)(43.69)(43.69)%
Payroll and related costs from management services contractsPayroll and related costs from management services contracts13,750 11,204 2,546 22.72 %Payroll and related costs from management services contracts4,293 5,235 5,235 (942)(942)(17.99)(17.99)%
General and administrative expenseGeneral and administrative expense131,387 110,378 21,009 19.03 %General and administrative expense50,018 55,802 55,802 (5,784)(5,784)(10.37)(10.37)%
Other Revenue:Other Revenue:
Less:Less:
Less:
Less:
Direct reimbursements of payroll and related costs from management services contracts
Direct reimbursements of payroll and related costs from management services contracts
Direct reimbursements of payroll and related costs from management services contractsDirect reimbursements of payroll and related costs from management services contracts13,750 11,204 2,546 22.72 %4,293 5,235 5,235 (942)(942)(17.99)(17.99)%
Development and management services revenueDevelopment and management services revenue28,122 19,650 8,472 43.11 %Development and management services revenue6,154 8,980 8,980 (2,826)(2,826)(31.47)(31.47)%
Net Operating IncomeNet Operating Income$1,496,376 $1,442,266 $54,110 3.75 %Net Operating Income$508,820 $$491,006 $$17,814 3.63 3.63 %
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BPLP
Nine months ended September 30,
20232022Increase/
(Decrease)
%
Change
(in thousands)
Net Income Attributable to Boston Properties Limited Partnership$84,232 $819,195 $(734,963)(89.72)%
Net Income Attributable to Noncontrolling Interests:
Noncontrolling interests in property partnerships59,337 54,896 4,441 8.09 %
Net Income143,569 874,091 (730,522)(83.58)%
Other Expenses:
Add:
Interest expense424,492 317,216 107,276 33.82 %
Loss from unconsolidated joint ventures261,793 1,389 260,404 18,747.59 %
Other Income:
Less:
Unrealized gain on non-real estate investment332 — 332 100.00 %
Gains (losses) from investments in securities2,311 (8,549)10,860 127.03 %
Other income - assignment fee— 6,624 (6,624)(100.00)%
Interest and other income (loss)48,999 6,151 42,848 696.60 %
Gains on sales of real estate517 385,349 (384,832)(99.87)%
Other Expenses:
Add:
Depreciation and amortization expense613,446 546,271 67,175 12.30 %
Transaction costs1,970 2,146 (176)(8.20)%
Payroll and related costs from management services contracts13,750 11,204 2,546 22.72 %
General and administrative expense131,387 110,378 21,009 19.03 %
Other Revenue:
Less:
Direct reimbursements of payroll and related costs from management services contracts13,750 11,204 2,546 22.72 %
Development and management services revenue28,122 19,650 8,472 43.11 %
Net Operating Income$1,496,376 $1,442,266 $54,110 3.75 %
Three months ended March 31,
20242023Increase/
(Decrease)
%
Change
(in thousands)
Net Income Attributable to Boston Properties Limited Partnership$91,080 $88,830 $2,250 2.53 %
Net Income Attributable to Noncontrolling Interests:
Noncontrolling interests in property partnerships17,221 18,660 (1,439)(7.71)%
Net Income108,301 107,490 811 0.75 %
Other Expenses:
Add:
Interest expense161,891 134,207 27,684 20.63 %
Impairment loss13,615 — 13,615 100.00 %
Other Income:
Less:
Unrealized gain on non-real estate investment396 259 137 52.90 %
Gains from investments in securities2,272 1,665 607 36.46 %
Interest and other income (loss)14,529 10,941 3,588 32.79 %
Income (loss) from unconsolidated joint ventures19,186 (7,569)26,755 353.48 %
Other Expenses:
Add:
Depreciation and amortization expense217,019 206,872 10,147 4.90 %
Transaction costs513 911 (398)(43.69)%
Payroll and related costs from management services contracts4,293 5,235 (942)(17.99)%
General and administrative expense50,018 55,802 (5,784)(10.37)%
Other Revenue:
Less:
Direct reimbursements of payroll and related costs from management services contracts4,293 5,235 (942)(17.99)%
Development and management services revenue6,154 8,980 (2,826)(31.47)%
Net Operating Income$508,820 $491,006 $17,814 3.63 %
At September 30,March 31, 2024 and 2023, and 2022, we owned or had joint venture interests in a portfolio of 190187 and 193192 commercial real estate properties, respectively (in each case, the “Total Property Portfolio”). As a result of changes within our Total Property Portfolio, the financial data presented below shows significant changes in revenue and expenses from period-to-period. Accordingly, we do not believe that our period-to-period financial data with respect to the Total Property Portfolio provides a complete understanding of our operating results. Therefore, the comparison of operating results for the three and nine months ended September 30,March 31, 2024 and 2023 and 2022 show separately the changes attributable to the properties that were owned by us and in-service throughout each period compared (the “Same Property Portfolio”) and the changes attributable to the properties included in the Acquired, Placed In-Service, In or Held for Development or Redevelopment or Sold Portfolios.
In our analysis of operating results, particularly to make comparisons of NOInet operating income between periods more meaningful, it is important to provide information for properties that were in-service and owned by us throughout each period presented. We refer to properties acquired or placed in-service prior to the beginning of the earliest period presented and owned by us and in-service through the end of the latest period presented as our Same Property Portfolio. The Same Property Portfolio therefore excludes properties acquired, placed in-service or in or held for development or redevelopment after the beginning of the earliest period presented or disposed of prior to the end of the latest period presented.
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NOI is a non-GAAP financial measure equal to net income attributable to Boston Properties, Inc. and net income attributable to Boston Properties Limited Partnership, as applicable, the most directly comparable GAAP financial measures, plus (1) net income attributable to noncontrolling interests, interest expense, impairment loss, from unconsolidated joint ventures, depreciation and amortization expense, transaction costs, payroll and related costs from management services
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contracts and corporate general and administrative expense less (2) unrealized gain on non-real estate investment, gains (losses) from investments in securities, other income - assignment fee, interest and other income (loss), gains on sales of real estate,income (loss) from unconsolidated joint ventures, direct reimbursements of payroll and related costs from management services contracts and development and management services revenue. We use NOI internally as a performance measure and believe it provides useful information to investors regarding our results of operations and financial condition because, when compared across periods, it reflects the impact on operations from trends in occupancy rates, rental rates, operating costs and acquisition and development activity on an unleveraged basis, providing perspective not immediately apparent from net income attributable to Boston Properties, Inc. and net income attributable to Boston Properties Limited Partnership. For example, interest expense is not necessarily linked to the operating performance of a real estate asset and is often incurred at the corporate level as opposed to the property level. Similarly, interest expense may be incurred at the property level even though the financing proceeds may be used at the corporate level (e.g., used for other investment activity). In addition, depreciation and amortization expense, because of historical cost accounting and useful life estimates, may distort operating performance measures at the property level. NOI presented by us may not be comparable to NOI reported by other REITs or real estate companies that define NOI differently.
We believe that in order to understand our operating results, NOI should be examined in conjunction with net income attributable to Boston Properties, Inc. and net income attributable to Boston Properties Limited Partnership as presented in our Consolidated Financial Statements. NOI should not be considered as a substitute for net income attributable to Boston Properties, Inc. or net income attributable to Boston Properties Limited Partnership (determined in accordance with GAAP) or any other GAAP financial measures and should only be considered together with and as a supplement to our financial information prepared in accordance with GAAP.
The gains on sales of real estate and depreciationDepreciation expense may differ between BXP and BPLP as a result of previously applied acquisition accounting by BXP for the issuance of common stock in connection with non-sponsor redemptions of common units of limited partnership interest of BPLP (“OP Units”). This accounting resulted in a step-up of the real estate assets at BXP that was allocated to certain properties. The difference between the real estate assets of BXP as compared to BPLP for certain properties having an allocation of the real estate step-up will result in a corresponding difference in gains on sales of real estate and depreciation expense when those properties are sold. For additional information see the Explanatory Note that immediately follows the cover page of this Quarterly Report on Form 10-Q.
Comparison of the ninethree months ended September 30, 2023March 31, 2024 to the ninethree months ended September 30, 2022March 31, 2023
The table below shows selected operating information for the Same Property Portfolio and the Total Property Portfolio. The Same Property Portfolio consists of 126130 properties totaling approximately 38.340.8 million net rentable square feet, excluding unconsolidated joint ventures. The Same Property Portfolio includes properties acquired or placed in-service on or prior to January 1, 20222023 and owned and in servicein-service through September 30, 2023.March 31, 2024. The Total Property Portfolio includes the effects of the other properties either acquired, placed in-service, in or held for development or redevelopment after January 1, 20222023 or disposed of on or prior to September 30, 2023.March 31, 2024. This table includes a reconciliation from the Same Property Portfolio to the Total Property Portfolio by also providing information for the ninethree months ended September 30,March 31, 2024 and 2023 and 2022 with respect to the properties that were acquired, placed in-service, in or held for development or redevelopment or sold. We did not sell any properties during the three months ended March 31, 2024 and 2023.


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Same Property PortfolioProperties Acquired PortfolioProperties
Placed In-Service
Portfolio
Properties in or Held for Development or Redevelopment PortfolioProperties Sold PortfolioTotal Property Portfolio
20232022Increase/
(Decrease)
%
Change
2023202220232022202320222023202220232022Increase/
(Decrease)
%
Change
(dollars in thousands)Same Property PortfolioProperties
Acquired Portfolio
Properties
Placed In-Service
Portfolio
Properties in or Held for
Development or
Redevelopment
Portfolio
Total Property Portfolio
202420242023Increase/
(Decrease)
%
Change
20242023202420232024202320242023Increase/
(Decrease)
%
Change
(dollars in thousands)(dollars in thousands)
Rental Revenue: (1)Rental Revenue: (1)
Lease Revenue (Excluding Termination Income)
Lease Revenue (Excluding Termination Income)
Lease Revenue (Excluding Termination Income)Lease Revenue (Excluding Termination Income)$2,070,012 $2,035,404 $34,608 1.70 %$71,763 $18,524 $103,519 $38,043 $2,357 $8,011 $1,248 $33,358 $2,248,899 $2,133,340 $115,559 5.42 %$736,512 $$740,069 $$(3,557)(0.48)(0.48)%$25,500 $$— $$12,436 $$5,014 $$242 $$417 $$774,690 $$745,500 $$29,190 3.92 3.92 %
Termination IncomeTermination Income1,333 5,579 (4,246)(76.11)%1,046 402 218 — — — — — 2,597 5,981 (3,384)(56.58)%Termination Income1,810 195 195 1,615 1,615 828.21 828.21 %189 — — — — — — — — — — 1,999 1,999 195 195 1,804 1,804 925.13 925.13 %
Lease RevenueLease Revenue2,071,345 2,040,983 30,362 1.49 %72,809 18,926 103,737 38,043 2,357 8,011 1,248 33,358 2,251,496 2,139,321 112,175 5.24 %Lease Revenue738,322 740,264 740,264 (1,942)(1,942)(0.26)(0.26)%25,689 — — 12,436 12,436 5,014 5,014 242 242 417 417 776,689 776,689 745,695 745,695 30,994 30,994 4.16 4.16 %
Parking and Other75,846 66,191 9,655 14.59 %3,046 1,461 1,053 — — 7,511 806 79,946 75,969 3,977 5.24 %
Parking and Other RevenueParking and Other Revenue28,434 23,339 5,095 21.83 %2,512 — 487 127 — (3)31,433 23,463 7,970 33.97 %
Total Rental Revenue (1)Total Rental Revenue (1)2,147,191 2,107,174 40,017 1.90 %75,855 20,387 104,790 38,043 2,357 15,522 1,249 34,164 2,331,442 2,215,290 116,152 5.24 %Total Rental Revenue (1)766,756 763,603 763,603 3,153 3,153 0.41 0.41 %28,201 — — 12,923 12,923 5,141 5,141 242 242 414 414 808,122 808,122 769,158 769,158 38,964 38,964 5.07 5.07 %
Real Estate Operating ExpensesReal Estate Operating Expenses819,124 770,781 48,343 6.27 %12,034 5,013 29,659 10,274 4,408 5,935 327 10,528 865,552 802,531 63,021 7.85 %Real Estate Operating Expenses292,630 280,084 280,084 12,546 12,546 4.48 4.48 %9,577 — — 4,963 4,963 1,727 1,727 1,301 1,301 4,034 4,034 308,471 308,471 285,845 285,845 22,626 22,626 7.92 7.92 %
Net Operating Income (Loss), Excluding Residential and HotelNet Operating Income (Loss), Excluding Residential and Hotel1,328,067 1,336,393 (8,326)(0.62)%63,821 15,374 75,131 27,769 (2,051)9,587 922 23,636 1,465,890 1,412,759 53,131 3.76 %Net Operating Income (Loss), Excluding Residential and Hotel474,126 483,519 483,519 (9,393)(9,393)(1.94)(1.94)%18,624 — — 7,960 7,960 3,414 3,414 (1,059)(1,059)(3,620)(3,620)499,651 499,651 483,313 483,313 16,338 16,338 3.38 3.38 %
Residential Net Operating Income (2)Residential Net Operating Income (2)18,784 15,534 3,250 20.92 %— — — — — — — 5,410 18,784 20,944 (2,160)(10.31)%Residential Net Operating Income (2)6,998 6,263 6,263 735 735 11.74 11.74 %— — — — — — — — — — — 6,998 6,998 6,263 6,263 735 735 11.74 11.74 %
Hotel Net Operating Income (2)Hotel Net Operating Income (2)11,702 8,563 3,139 36.66 %— — — — — — — — 11,702 8,563 3,139 36.66 %Hotel Net Operating Income (2)2,171 1,430 1,430 741 741 51.82 51.82 %— — — — — — — — — — — 2,171 2,171 1,430 1,430 741 741 51.82 51.82 %
Net Operating Income (Loss)Net Operating Income (Loss)$1,358,553 $1,360,490 $(1,937)(0.14)%$63,821 $15,374 $75,131 $27,769 $(2,051)$9,587 $922 $29,046 $1,496,376 $1,442,266 $54,110 3.75 %Net Operating Income (Loss)$483,295 $$491,212 $$(7,917)(1.61)(1.61)%$18,624 $$— $$7,960 $$3,414 $$(1,059)$$(3,620)$$508,820 $$491,006 $$17,814 3.63 3.63 %
_______________
(1)Rental Revenue is equal to Revenue less Development and Management Services Revenue and Direct Reimbursements of Payroll and Related Costs from Management Services Revenue per the Consolidated Statements of Operations, excluding the residential and hotel revenue that is noted below. We use Rental Revenue internally as a performance measure and in calculating other non-GAAP financial measures (e.g., NOI), which provides investors with information regarding our performance that is not immediately apparent from the comparable non-GAAP measures and allows investors to compare operating performance between periods.
(2)For a detailed discussion of NOI, including the reasons management believes NOI is useful to investors, see page 60.51. Residential Net Operating Income for the ninethree months ended September 30,March 31, 2024 and 2023 and 2022 is comprised of Residential Revenue of $35,768$12,684 and $44,218$11,726 less Residential Expenses of $16,984$5,686 and $23,274,$5,463, respectively. Hotel Net Operating Income for the ninethree months ended September 30,March 31, 2024 and 2023 and 2022 is comprised of Hotel Revenue of $35,554$8,186 and $28,395$8,101 less Hotel Expenses of $23,852$6,015 and $19,832,$6,671, respectively, per the Consolidated Statements of Operations.
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Same Property Portfolio
Lease Revenue (Excluding Termination Income)
Lease revenue (excluding termination income) from the Same Property Portfolio increaseddecreased by approximately $34.6$3.6 million for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022.2023. The increasedecrease was a result of our average occupancy decreasing from 90.2% to 89.3%, resulting in a decrease of approximately $7.1 million, partially offset by our average revenue per square foot increasing by approximately $2.08,$0.25, contributing approximately $57.9 million, partially offset by average occupancy decreasing from 91.4% to 90.3%, resulting in a decrease of approximately $23.3$3.5 million.
Termination Income
Termination income decreasedincreased by approximately $4.2$1.6 million for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022.2023.
Termination income for the ninethree months ended September 30, 2023March 31, 2024 related to approximately 20ten clients across the Same Property Portfolio and totaled approximately $1.3$1.8 million, which was primarily related to clients that terminated leases early in Washington, DC.San Francisco, California.
Termination income for the ninethree months ended September 30, 2022March 31, 2023 related to 21seven clients across the Same Property Portfolio and totaled approximately $5.0$0.2 million, which was primarily related to clients that terminated leases early in New York City. In addition, we received a distribution from our unsecured credit claim against Lehman Brothers, Inc. of approximately $0.6 million.
Parking and Other Revenue
Parking and other revenue increased by approximately $9.7$5.1 million for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022.2023. Parking and other revenue increased by approximately $6.4$0.5 million and $3.3$4.6 million, respectively. The increase in parking revenue was primarily due to an increase in transient and monthly parking. The increase in other revenue was primarily related toassociated with the View Boston observatory, which was completed and placed in-service on June 1, 2023.
Real Estate Operating Expenses
Real estate operating expenses from the Same Property Portfolio increased by approximately $48.3$12.5 million, or 6.3%4.5%, for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022,2023, due primarily to increases in real estate taxesrepairs and maintenance of approximately $15.8$3.7 million, or 4.2%8.4%, and other real estate operating expenses of approximately $26.9$4.9 million, or 6.9%2.1%. The increase in real estate taxesrepairs and maintenance was primarily in New York City.Boston. In addition, there was approximately $5.6$3.9 million related to the marketing and operating expenses associated with the View Boston observatory, which was completed and placed in-service on June 1, 2023.
Properties Acquired Portfolio
The table below lists the properties acquired between January 1, 20222023 and September 30, 2023.March 31, 2024. Rental revenue and real estate operating expenses increased by approximately $55.5$28.2 million and $7.0$9.6 million, respectively, for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022,2023, as detailed below.
Square FeetRental RevenueReal Estate Operating Expenses
NameDate acquired20232022Change20232022Change
(dollars in thousands)
Madison Centre (1)May 17, 2022754,988 $44,971 $18,765 $26,206 $9,017 $4,805 $4,212 
125 BroadwaySeptember 16, 2022271,000 30,884 1,622 29,262 3,017 208 2,809 
1,025,988 $75,855 $20,387 $55,468 $12,034 $5,013 $7,021 
Square FeetRental RevenueReal Estate Operating Expenses
NameDate acquired20242023Change20242023Change
(dollars in thousands)
Santa Monica Business Park (1)December 14, 20231,182,696 $20,401 $— $20,401 $6,569 $— $6,569 
901 New York AvenueJanuary 8, 2024523,939 7,800 — 7,800 3,008 — 3,008 
1,706,635 $28,201 $— $28,201 $9,577 $— $9,577 
______________
(1)Rental revenue for the ninethree months ended September 30, 2023 andMarch 31, 2024September 30, 2022 includes approximately $1.0 million and $0.4$0.2 million of termination income, respectively.income.
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Properties Placed In-Service Portfolio
The table below lists the properties that were placed in-service or partially placed in-service between January 1, 20222023 and September 30, 2023.March 31, 2024. Rental revenue and real estate operating expenses from our Properties Placed In-Service Portfolio increased by approximately $66.7$7.8 million and $19.4$3.2 million, respectively, for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022,2023, as detailed below.
Quarter Initially Placed In-ServiceQuarter Fully Placed In-ServiceRental RevenueReal Estate Operating Expenses
NameSquare Feet20232022Change20232022Change
(dollars in thousands)
Reston NextFourth Quarter, 2021Fourth Quarter, 20221,063,296 $34,352 $24,029 $10,323 $11,934 $7,861 $4,073 
325 Main StreetSecond Quarter, 2022Second Quarter, 2022414,565 34,787 10,295 24,492 6,317 830 5,487 
2100 Pennsylvania AvenueSecond Quarter, 2022Second Quarter, 2023475,849 15,911 169 15,742 6,752 305 6,447 
880 Winter Street (1)Third Quarter, 2022Fourth Quarter, 2022243,618 18,235 684 17,551 4,111 376 3,735 
140 Kendrick Street - Building AThird Quarter, 2023Third Quarter, 2023104,166 1,505 2,866 (1,361)545 902 (357)
180 CityPointThird Quarter, 2023N/A329,000 — — — — — — 
2,630,494 $104,790 $38,043 $66,747 $29,659 $10,274 $19,385 
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_____________
(1)Conversion of a 224,000 square foot office property located in Waltham, Massachusetts to laboratory space. Rental revenue for the nine months ended September 30, 2023 includes approximately $0.2 million of termination income.
Quarter Initially Placed In-ServiceQuarter Fully Placed In-ServiceRental RevenueReal Estate Operating Expenses
NameSquare Feet20242023Change20242023Change
(dollars in thousands)
2100 Pennsylvania AvenueSecond Quarter, 2022Second Quarter, 2023475,849 $7,924 $5,141 $2,783 $2,721 $1,727 $994 
140 Kendrick Street - Building AThird Quarter, 2023Third Quarter, 2023104,166 1,925 — 1,925 592 — 592 
180 CityPointThird Quarter, 2023N/A329,000 3,074 — 3,074 1,389 — 1,389 
103 CityPointFourth Quarter, 2023N/A113,000 — — — 261 — 261 
1,022,015 $12,923 $5,141 $7,782 $4,963 $1,727 $3,236 
Properties in or Held for Development or Redevelopment Portfolio
The table below lists the properties that were in or held for development or redevelopment between January 1, 20222023 and September 30, 2023.March 31, 2024. Rental revenue and real estate operating expenses from our Properties in or Held for Development or Redevelopment Portfolio decreased by approximately $13.2$0.2 million and $1.5$2.7 million, respectively, for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022,2023, as detailed below.
Rental RevenueReal Estate Operating Expenses
NameDate Commenced or Held for Development / RedevelopmentSquare Feet20232022Change20232022Change
(dollars in thousands)
760 Boylston StreetSeptember 12, 2022118,000 $— $— $— $— $608 $(608)
105 Carnegie CenterNovember 30, 202273,000 — 931 (931)— 697 (697)
2096 Gaither RoadDecember 1, 202250,000 — 164 (164)93 273 (180)
RTC Next-Hotel (1)December 19, 2022N/A688 — 688 — 
Kendall Center Blue Parking Garage (2)January 4, 2023N/A— 7,485 (7,485)2,395 946 1,449 
300 Binney StreetJanuary 30, 2023236,000 — 4,651 (4,651)— 1,432 (1,432)
Lexington Office Park (3)March 31, 2023166,779 1,316 1,838 (522)1,615 1,729 (114)
2098 Gaither Road (3)March 31, 202350,000 353 453 (100)303 250 53 
693,779 $2,357 $15,522 $(13,165)$4,408 $5,935 $(1,527)
_____________
Rental RevenueReal Estate Operating Expenses
NameDate Commenced or Held for Development / RedevelopmentSquare Feet20242023Change20242023Change
(dollars in thousands)
105 Carnegie Center (1)November 30, 202273,000 $— $— $— $155 $— $155 
Kendall Center Blue Parking Garage (2)January 4, 2023N/A— 25 (25)— 2,277 (2,277)
300 Binney StreetJanuary 30, 2023236,000 — (900)900 — 117 (117)
Shady Grove Innovation District (3)March 31, 2023184,000 (45)631 (676)292 402 (110)
Lexington Office Park (3)March 31, 2023167,000 257 629 (372)417 611 (194)
1050 Winter Street (3)March 31, 2024162,000 30 29 437 627 (190)
822,000 $242 $414 $(172)$1,301 $4,034 $(2,733)
______________
(1)On December 19, 2022,November 30, 2023, we elected to suspend redevelopment. Although no longer in accordance with GAAP, the ground lease that encumbersredevelopment, this property was reclassifiedis not considered “in-service” as a sales-type lease andwe are not actively leasing this property in anticipation of restarting redevelopment in the associated assets were derecognized.future.
(2)The Kendall Center Blue Parking Garage was taken out of service on January 4, 2023 to support the development of 290 Binney Street. Real estate operating expenses for the ninethree months ended September 30,March 31, 2023 included approximately $2.4$2.3 million of demolition costs.
(3)A portion of Shady Grove Innovation District, Lexington Office Park and 2098 Gaither Road1050 Winter Street are no longer considered “in-service” because each property’s occupied percentage is less than 50% and we are no longer actively leasing the properties in anticipation of a future development/redevelopment.
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Properties Sold Portfolio
The table below lists the properties we soldShady Grove Innovation District is comprised of three buildings, 2092 and 2098 Gaither Road and 15825 Shady Grove Road that were taken out of service between January 1, 2022March 31, 2023 and September 30, 2023. Rental revenue and real estate operating expenses from our Properties Sold Portfolio decreased by approximately $42.0 million and $13.9 million, respectively, for the nine months ended September 30, 2023 compared to 2022, as detailed below.
Rental RevenueReal Estate Operating Expenses
NameDate SoldProperty TypeSquare Feet20232022Change20232022Change
(dollars in thousands)
Office
195 West StreetMarch 31, 2022Office63,500 $— $749 $(749)$— $242 $(242)
Virginia 95 Office ParkJune 15, 2022Office/Flex733,421 — 5,190 (5,190)— 1,787 (1,787)
601 Massachusetts AvenueAugust 30, 2022Office478,667 — 28,225 (28,225)— 8,499 (8,499)
Total Office1,275,588 — 34,164 (34,164)— 10,528 (10,528)
Residential
The Avant at Reston Town Center (1)November 8, 2022Residential329,195 1,249 9,099 (7,850)327 3,689 (3,362)
Total Residential329,195 1,249 9,099 (7,850)327 3,689 (3,362)
1,604,783 $1,249 $43,263 $(42,014)$327 $14,217 $(13,890)
_____________
(1)We retained and continue to own approximately 26,000 square feet of ground-level retail space. Rental Revenue and Real Estate Operating Expenses for the nine months ended September 30, 2023 represent the ground-level retail space. Rental Revenue and Real Estate Operating Expenses for the nine months ended September 30, 2022 represent the entire property and not just the portion sold.
For additional information on the sales of the above properties refer to “Results of Operations—Other Income and Expense Items—Gains on Sales of Real Estate” within “Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations.”March 31, 2024.
Residential Net Operating Income
Net operating income for our residential same properties increased by approximately $3.3$0.7 million for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022.2023.
The following reflects our occupancy and rate information for our residential same properties for the ninethree months ended September 30, 2023March 31, 2024 and 2022.2023.
Average Monthly Rental Rate (1)Average Rental Rate Per Occupied Square FootAverage Physical Occupancy (2)Average Economic Occupancy (3)
Name20232022Change (%)20232022Change (%)20232022Change (%)20232022Change (%)
Proto Kendall Square$3,060 $2,804 9.1 %$5.62 $5.16 8.9 %95.5 %94.8 %0.7 %95.1 %94.1 %1.1 %
The Lofts at Atlantic Wharf$4,443 $4,089 8.7 %$4.92 $4.55 8.1 %96.3 %97.8 %(1.5)%96.1 %97.3 %(1.2)%
Signature at Reston$2,689 $2,644 1.7 %$2.79 $2.73 2.2 %94.6 %95.2 %(0.6)%93.9 %94.7 %(0.8)%
The Skylyne$3,467 $3,378 2.6 %$4.41 $4.15 6.3 %92.3 %82.7 %11.6 %90.2 %80.2 %12.5 %
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_____________  
Average Monthly Rental Rate (1)Average Rental Rate Per Occupied Square FootAverage Physical Occupancy (2)Average Economic Occupancy (3)
Name20242023Change (%)20242023Change (%)20242023Change (%)20242023Change (%)
Proto Kendall Square$3,154 $3,002 5.1 %$5.79 $5.52 4.9 %94.9 %95.4 %(0.5)%94.4 %94.8 %(0.4)%
The Lofts at Atlantic Wharf$4,257 $4,428 (3.9)%$4.70 $4.91 (4.3)%95.0 %95.4 %(0.4)%94.5 %95.4 %(0.9)%
Signature at Reston$2,774 $2,677 3.6 %$2.85 $2.77 2.9 %95.5 %93.7 %1.9 %95.5 %93.1 %2.6 %
The Skylyne$3,478 $3,445 1.0 %$4.37 $4.38 (0.2)%87.9 %91.5 %(3.9)%86.7 %89.3 %(2.9)%
_______________  
(1)Average Monthly Rental Rate is calculated as the average of the quotients obtained by dividing (A) rental revenue as determined in accordance with GAAP, by (B) the number of occupied units for each month within the applicable fiscal period.
(2)Average Physical Occupancy is defined as (1) the average number of occupied units divided by (2) the total number of units, expressed as a percentage.
(3)Average Economic Occupancy is defined as (1) total possible revenue less vacancy loss divided by (2) total possible revenue, expressed as a percentage. Total possible revenue is determined by valuing average occupied units at contract rates and average vacant units at Market Rents. Vacancy loss is determined by valuing vacant units at current
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Market Rents. By measuring vacant units at their Market Rents, Average Economic Occupancy takes into account the fact that units of different sizes and locations within a residential property have different economic impacts on a residential property’s total possible gross revenue. Market Rents“Market Rents” used by us in calculating Average Economic Occupancy are based on the current market rates set by the managers of our residential properties based on their experience in renting their residential property’s units and publicly available market data. Actual market rents and trends in such rents for a region as reported by others may vary materially from Market Rents used by us. Market Rents for a period are based on the average Market Rents during that period and do not reflect any impact for cash concessions.
Hotel Net Operating Income
The Boston Marriott Cambridge hotel had net operating income of approximately $11.7$2.2 million for the ninethree months ended September 30, 2023,March 31, 2024, representing an increase of approximately $3.1$0.7 million compared to the ninethree months ended September 30, 2022. As demand for travel has returned, the Boston Marriott Cambridge has seen an increase in occupancy and room rates, which has led to increased net operating income.March 31, 2023.
The following reflects our occupancy and rate information for the Boston Marriott Cambridge hotel for the ninethree months ended September 30, 2023March 31, 2024 and 2022.2023.
20232022
Change (%)
202420242023
Change (%)
OccupancyOccupancy73.5 %63.4 %15.9 %Occupancy71.0 %61.3 %15.8 %
Average daily rateAverage daily rate$326.22 $315.24 3.5 %Average daily rate$254.86 $$261.52 (2.5)(2.5)%
REVPARREVPAR$239.64 $199.83 19.9 %REVPAR$181.05 $$160.41 12.9 12.9 %
Other Operating Revenue and Expense Items
Development and Management Services Revenue
Development and management services revenue increaseddecreased by approximately $8.5$2.8 million for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022.2023. Development services revenue and management services revenue increaseddecreased by approximately $2.9$1.2 million and $5.6$1.6 million, respectively. The increasedecrease in development services revenue was primarily related to an increasea decrease in development fees earned from unconsolidated joint venture propertiesassociated with a tenant improvement project in the San Francisco and Washington, DC regions.New York City. The increasedecrease in management services revenue was primarily related to an increasea decrease in property management fees from an unconsolidated joint venture in the New York region and asset management fees earned from an unconsolidated joint venture in the Los Angeles region.region which we acquired the joint venture partner’s interest in December 2023.
General and Administrative Expense
General and administrative expense increaseddecreased by approximately $21.0$5.8 million for the ninethree months ended September 30, 2023March 31, 2024 compared to 20222023 primarily due to increasesa decrease in compensation expense andof approximately $6.1 million, partially offset by an approximately $0.3 million increase in other general and administrative expenses of approximately $19.0 million and $2.0 million, respectively.expenses. The increasedecrease in compensation expense related to (1) an approximately $10.8$6.7 million decrease in other compensation expenses partially offset by an approximately $0.6 million increase in the value of our deferred compensation plan and (2) an approximately $8.2 million increase in other compensation expenses, primarily due to age-based vesting and annual increases in employee compensation. The increase in other general and administrative expenses primarily related to an increase in professional fees.plan.
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Wages directly related to the development of rental properties are capitalized and included in real estate assets on our Consolidated Balance Sheets and amortized over the useful lives of the applicable asset or lease term. Capitalized wages for the ninethree months ended September 30,March 31, 2024 and 2023 and 2022 were approximately $13.5$4.1 million and $12.0$4.5 million, respectively. These costs are not included in the general and administrative expenses discussed above.
Transaction Costs
Transaction costs decreased by approximately $0.2$0.4 million for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022.2023 due primarily to decreased costs incurred in connection with the pursuit and formation of new joint ventures during the three months ended March 31, 2023, that did not recur in 2024. In general, transaction costs relating to the formation of new joint ventures and the pursuit of other transactions are expensed as incurred.
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Depreciation and Amortization Expense
Depreciation expense may differ between BXP and BPLP as a result of previously applied acquisition accounting by BXP for the issuance of common stock in connection with non-sponsor OP Unit redemptions by BPLP.  This accounting resulted in a step-up of the real estate assets at BXP that was allocated to certain properties.  The difference between the real estate assets of BXP as compared to BPLP for certain properties having an allocation of the real estate step-up will result in a corresponding difference in depreciation expense. For additional information see the Explanatory Note that immediately follows the cover page of this Quarterly Report on Form 10-Q.
BXP
Depreciation and amortization expense increased by approximately $67.3$10.0 million for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022,2023, as detailed below.
PortfolioDepreciation and Amortization for the nine months ended September 30,
20232022Change
(in thousands)
Same Property Portfolio$528,915 $507,731 $21,184 
Properties Acquired Portfolio52,406 13,703 38,703 
Properties Placed In-Service Portfolio36,080 14,522 21,558 
Properties in or Held for Development or Redevelopment Portfolio (1)1,010 7,438 (6,428)
Properties Sold Portfolio335 8,051 (7,716)
$618,746 $551,445 $67,301 
_____________
PortfolioDepreciation and Amortization for the three months ended March 31,
20242023Change
(in thousands)
Same Property Portfolio$198,939 $193,775 $5,164 
Properties Acquired Portfolio14,141 — 14,141 
Properties Placed In-Service Portfolio5,075 1,783 3,292 
Properties in or Held for Development or Redevelopment Portfolio (1)561 13,176 (12,615)
$218,716 $208,734 $9,982 
______________
(1)During the ninethree months ended September 30,March 31, 2023, the Kendall Center Blue Parking Garage was taken out of service and demolished to support the development of 290 Binney Street, an approximately 566,000 net rentable square foot laboratory/life sciences project in Cambridge, Massachusetts. As a result, during the ninethree months ended September 30,March 31, 2023, we recorded approximately $0.8 million of accelerated depreciation expense for the demolition of the garage, of which approximately $0.2 million related to the step-up of real estate assets.
BPLP
Depreciation and amortization expense increased by approximately $67.2$10.1 million for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022,2023, as detailed below.
PortfolioDepreciation and Amortization for the nine months ended September 30,
20232022Change
(in thousands)
Same Property Portfolio$523,615 $502,557 $21,058 
Properties Acquired Portfolio52,406 13,703 38,703 
Properties Placed In-Service Portfolio36,080 14,522 21,558 
Properties in or Held for Development or Redevelopment Portfolio (1)1,010 7,438 (6,428)
Properties Sold Portfolio335 8,051 (7,716)
$613,446 $546,271 $67,175 
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_____________
PortfolioDepreciation and Amortization for the three months ended March 31,
20242023Change
(in thousands)
Same Property Portfolio$197,242 $192,093 $5,149 
Properties Acquired Portfolio14,141 — 14,141 
Properties Placed In-Service Portfolio5,075 1,783 3,292 
Properties in or Held for Development or Redevelopment Portfolio (1)561 12,996 (12,435)
$217,019 $206,872 $10,147 
______________
(1)During the ninethree months ended September 30,March 31, 2023, the Kendall Center Blue Parking Garage was taken out of service and demolished to support the development of 290 Binney Street, an approximately 566,000 net rentable square foot laboratory/life sciences project in Cambridge, Massachusetts. As a result, during the ninethree months ended September 30,March 31, 2023, we recorded approximately $0.6 million of accelerated depreciation expense for the demolition of the garage.
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Direct Reimbursements of Payroll and Related Costs From Management Services Contracts and Payroll and Related Costs From Management Service Contracts
We have determined that amounts reimbursed for payroll and related costs received from third parties in connection with management services contracts should be reflected on a gross basis instead of on a net basis as we have determined that we are the principal under these arrangements. We anticipate that these two financial statement line items will generally offset each other.
Other Income and Expense Items
LossIncome (Loss) from Unconsolidated Joint Ventures
For the ninethree months ended September 30, 2023March 31, 2024 compared to 2022, loss2023, income (loss) from unconsolidated joint ventures increased by approximately $260.4$26.8 million primarily due to non-cash impairment charges related to our investments in 360 Park Avenue South, 200 Fifth Avenue, Platform 16, and Safeco Plaza of approximately $54.0 million, $33.4 million, $155.2 million, and $29.9 million, respectively, partially offset by an approximately $35.8$21.8 million gain on investmentconsolidation related to the acquisition of our Metropolitan Square joint venture partner’s economic interest in the joint venture that owns 901 New York Avenue during the three months ended March 31, 2024 (See Note 5 to the Consolidated Financial Statements).
Gains on Sales of Real Estate
Gains on sales of real estate may differ between BXP and BPLP as a result of previously applied acquisition accounting by BXP for the issuance of common stock in connection with non-sponsor OP Unit redemptions by BPLP. This accounting resulted in a step-up of the real estate assets at BXP that was allocated to certain properties. The difference between the real estate assets of BXP as compared to BPLP for certain properties having an allocation of the real estate step-up will result in a corresponding difference in the gains on sales of real estate when those properties are sold. For additional information, see the Explanatory Note that immediately follows the cover page of this Quarterly Report on Form 10-Q.
BXP
Gains on sales of real estate decreased by approximately $380.8 million for the nine months ended September 30, 2023 compared to 2022, as detailed below.
NameDate SoldProperty TypeSquare FeetSale PriceNet Cash ProceedsGain on Sale of Real Estate
(dollars in millions)
2023
N/A$— $— $— (1)
2022
195 West StreetMarch 31, 2022Office63,500 $37.7 $35.4 $22.7 
Virginia 95 Office ParkJune 15, 2022Office/Flex733,421 127.5 121.9 96.2 
601 Massachusetts AvenueAugust 30, 2022Office478,667 531.0 512.3 237.4 
Broadrun Land ParcelSeptember 15, 2022LandN/A27.0 25.6 24.4 
$723.2 $695.2 $380.7 (2)
___________
(1)Excludes approximately $0.5 million of gains on sales of real estate recognized during the nine months ended September 30, 2023 related to gain amounts from sales of real estate occurring in prior periods.
(2)Excludes approximately $0.6 million of gains on sales of real estate recognized during the nine months ended September 30, 2022 related to gain amounts from sales of real estate occurring in prior periods.
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BPLP
Gains on sales of real estate decreased by approximately $384.8 million for the nine months ended September 30, 2023 compared to 2022, as detailed below.
NameDate SoldProperty TypeSquare FeetSale PriceNet Cash ProceedsGain on Sale of Real Estate
(dollars in millions)
2023
N/A$— $— $— (1)
2022
195 West StreetMarch 31, 2022Office63,500 $37.7 $35.4 $23.4 
Virginia 95 Office ParkJune 15, 2022Office/Flex733,421 127.5 121.9 99.5 
601 Massachusetts AvenueAugust 30, 2022Office478,667 531.0 512.3 237.5 
Broadrun Land ParcelSeptember 15, 2022LandN/A27.0 25.6 24.4 
$723.2 $695.2 $384.8 (2)
___________
(1)Excludes approximately $0.5 million of gains on sales of real estate recognized during the nine months ended September 30, 2023 related to gain amounts from sales of real estate occurring in prior periods.
(2)Excludes approximately $0.5 million of gains on sales of real estate recognized during the nine months ended September 30, 2022 related to gain amounts from sales of real estate occurring in prior periods.
Interest and Other Income (Loss)
Interest and other income (loss) increased by approximately $42.8$3.6 million for the ninethree months ended September 30, 2023March 31, 2024 compared to 2022,2023, due primarily to an increase of approximately $43.6 million in interest income due tofrom increased interest earned on our deposits partially offset by an increase in our allowance for current expected credit losses of approximately $0.8 million.
Other Income - Assignment Fee
On April 19, 2021, we entered into an agreement to acquire 11251 Roger Bacon Drive in Reston, Virginia for an aggregate purchase price of approximately $5.6 million. On April 7, 2022, we executed an agreement to assign the right to acquire 11251 Roger Bacon Drive to a third party for an assignment fee of approximately $6.9 million. Net cash proceeds totaled approximately $6.6 million. 11251 Roger Bacon Drive is an approximately 65,000 square foot office building situated on approximately 2.6 acres.deposits.
Gains (Losses) from Investments in Securities
Gains (losses)Gain from investments in securities for the ninethree months ended September 30,March 31, 2024 and 2023 and 2022 related to investments that we have made to reduce our market risk relating to deferred compensation plans that we maintain for BXP’s officers and former non-employee directors. Under the deferred compensation plans, each officer or non-employee director who is eligible to participate is permitted to defer a portion of the officer’s current income or the non-employee director’s compensation on a pre-tax basis and receive a tax-deferred return on these deferrals based on the performance of specific investments selected by the officer or non-employee director. In order to reduce our market risk relating to these plans, we typically acquire, in a separate account that is not restricted as to its use, similar or identical investments as those selected by each officer or non-employee director. This enables us to generally match our liabilities to BXP’s officers or former non-employee directors under our deferred compensation plans with equivalent assets and thereby limit our market risk. The performance of these investments is recorded as gains (losses) from investments in securities. During the ninethree months ended September 30,March 31, 2024 and 2023, and 2022, we recognized gains (losses) of approximately $2.3 million and $(8.5)$1.7 million, respectively, on these investments. By comparison, our general and administrative expense increased (decreased) by approximately $2.3 million and $(8.5)$1.7 million during the ninethree months ended September 30,March 31, 2024 and 2023, and 2022, respectively, as a result of increases (decreases) in our liability under our deferred compensation plans that was associated with the performance of the specific investments selected by officers and former non-employee directors of BXP participating in the plans.
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Unrealized Gain on Non-Real Estate InvestmentSame Property Portfolio
DuringLease Revenue (Excluding Termination Income)
Lease revenue (excluding termination income) from the yearSame Property Portfolio decreased by approximately $3.6 million for the three months ended DecemberMarch 31, 2022, we began investing in non-real estate investments, which are primarily environmentally focused investment funds. As2024 compared to 2023. The decrease was a result of our average occupancy decreasing from 90.2% to 89.3%, resulting in a decrease of approximately $7.1 million, partially offset by our average revenue per square foot increasing by approximately $0.25, contributing approximately $3.5 million.
Termination Income
Termination income increased by approximately $1.6 million for the ninethree months ended SeptemberMarch 31, 2024 compared to 2023.
Termination income for the three months ended March 31, 2024 related to ten clients across the Same Property Portfolio and totaled approximately $1.8 million, which was primarily related to clients that terminated leases early in San Francisco, California.
Termination income for the three months ended March 31, 2023 related to seven clients across the Same Property Portfolio and totaled approximately $0.2 million, which was primarily related to clients that terminated leases early in New York City.
Parking and Other Revenue
Parking and other revenue increased by approximately $5.1 million for the three months ended March 31, 2024 compared to 2023. Parking and other revenue increased by approximately $0.5 million and $4.6 million, respectively. The increase in other revenue was primarily associated with the View Boston observatory, which was completed and placed in-service on June 1, 2023.
Real Estate Operating Expenses
Real estate operating expenses from the Same Property Portfolio increased by approximately $12.5 million, or 4.5%, for the three months ended March 31, 2024 compared to 2023, due primarily to increases in repairs and maintenance of approximately $3.7 million, or 8.4%, and other real estate operating expenses of approximately $4.9 million, or 2.1%. The increase in repairs and maintenance was primarily in Boston. In addition, there was approximately $3.9 million related to the marketing and operating expenses associated with the View Boston observatory, which was completed and placed in-service on June 1, 2023.
Properties Acquired Portfolio
The table below lists the properties acquired between January 1, 2023 and March 31, 2024. Rental revenue and real estate operating expenses increased by approximately $28.2 million and $9.6 million, respectively, for the three months ended March 31, 2024 compared to 2023, as detailed below.
Square FeetRental RevenueReal Estate Operating Expenses
NameDate acquired20242023Change20242023Change
(dollars in thousands)
Santa Monica Business Park (1)December 14, 20231,182,696 $20,401 $— $20,401 $6,569 $— $6,569 
901 New York AvenueJanuary 8, 2024523,939 7,800 — 7,800 3,008 — 3,008 
1,706,635 $28,201 $— $28,201 $9,577 $— $9,577 
______________
(1)Rental revenue for the three months ended March 31, 2024 includes approximately $0.2 million of termination income.

Properties Placed In-Service Portfolio
The table below lists the properties that were placed in-service or partially placed in-service between January 1, 2023 and March 31, 2024. Rental revenue and real estate operating expenses from our Properties Placed In-Service Portfolio increased by approximately $7.8 million and $3.2 million, respectively, for the three months ended March 31, 2024 compared to 2023, as detailed below.
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Quarter Initially Placed In-ServiceQuarter Fully Placed In-ServiceRental RevenueReal Estate Operating Expenses
NameSquare Feet20242023Change20242023Change
(dollars in thousands)
2100 Pennsylvania AvenueSecond Quarter, 2022Second Quarter, 2023475,849 $7,924 $5,141 $2,783 $2,721 $1,727 $994 
140 Kendrick Street - Building AThird Quarter, 2023Third Quarter, 2023104,166 1,925 — 1,925 592 — 592 
180 CityPointThird Quarter, 2023N/A329,000 3,074 — 3,074 1,389 — 1,389 
103 CityPointFourth Quarter, 2023N/A113,000 — — — 261 — 261 
1,022,015 $12,923 $5,141 $7,782 $4,963 $1,727 $3,236 
Properties in or Held for Development or Redevelopment Portfolio
The table below lists the properties that were in or held for development or redevelopment between January 1, 2023 and March 31, 2024. Rental revenue and real estate operating expenses from our Properties in or Held for Development or Redevelopment Portfolio decreased by approximately $0.2 million and $2.7 million, respectively, for the three months ended March 31, 2024 compared to 2023, as detailed below.
Rental RevenueReal Estate Operating Expenses
NameDate Commenced or Held for Development / RedevelopmentSquare Feet20242023Change20242023Change
(dollars in thousands)
105 Carnegie Center (1)November 30, 202273,000 $— $— $— $155 $— $155 
Kendall Center Blue Parking Garage (2)January 4, 2023N/A— 25 (25)— 2,277 (2,277)
300 Binney StreetJanuary 30, 2023236,000 — (900)900 — 117 (117)
Shady Grove Innovation District (3)March 31, 2023184,000 (45)631 (676)292 402 (110)
Lexington Office Park (3)March 31, 2023167,000 257 629 (372)417 611 (194)
1050 Winter Street (3)March 31, 2024162,000 30 29 437 627 (190)
822,000 $242 $414 $(172)$1,301 $4,034 $(2,733)
______________
(1)On November 30, 2023, we recognizedelected to suspend redevelopment. Although no longer in redevelopment, this property is not considered “in-service” as we are not actively leasing this property in anticipation of restarting redevelopment in the future.
(2)The Kendall Center Blue Parking Garage was taken out of service on January 4, 2023 to support the development of 290 Binney Street. Real estate operating expenses for the three months ended March 31, 2023 included approximately $2.3 million of demolition costs.
(3)A portion of Shady Grove Innovation District, Lexington Office Park and 1050 Winter Street are no longer considered “in-service” because each property’s occupied percentage is less than 50% and we are no longer actively leasing the properties in anticipation of a future development/redevelopment. This portion of Shady Grove Innovation District is comprised of three buildings, 2092 and 2098 Gaither Road and 15825 Shady Grove Road that were taken out of service between March 31, 2023 and March 31, 2024.
Residential Net Operating Income
Net operating income for our residential same properties increased by approximately $0.7 million for the three months ended March 31, 2024 compared to 2023.
The following reflects our occupancy and rate information for our residential same properties for the three months ended March 31, 2024 and 2023.
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Average Monthly Rental Rate (1)Average Rental Rate Per Occupied Square FootAverage Physical Occupancy (2)Average Economic Occupancy (3)
Name20242023Change (%)20242023Change (%)20242023Change (%)20242023Change (%)
Proto Kendall Square$3,154 $3,002 5.1 %$5.79 $5.52 4.9 %94.9 %95.4 %(0.5)%94.4 %94.8 %(0.4)%
The Lofts at Atlantic Wharf$4,257 $4,428 (3.9)%$4.70 $4.91 (4.3)%95.0 %95.4 %(0.4)%94.5 %95.4 %(0.9)%
Signature at Reston$2,774 $2,677 3.6 %$2.85 $2.77 2.9 %95.5 %93.7 %1.9 %95.5 %93.1 %2.6 %
The Skylyne$3,478 $3,445 1.0 %$4.37 $4.38 (0.2)%87.9 %91.5 %(3.9)%86.7 %89.3 %(2.9)%
_______________  
(1)Average Monthly Rental Rate is calculated as the average of the quotients obtained by dividing (A) rental revenue as determined in accordance with GAAP, by (B) the number of occupied units for each month within the applicable fiscal period.
(2)Average Physical Occupancy is defined as (1) the average number of occupied units divided by (2) the total number of units, expressed as a percentage.
(3)Average Economic Occupancy is defined as (1) total possible revenue less vacancy loss divided by (2) total possible revenue, expressed as a percentage. Total possible revenue is determined by valuing average occupied units at contract rates and average vacant units at Market Rents. Vacancy loss is determined by valuing vacant units at current Market Rents. By measuring vacant units at their Market Rents, Average Economic Occupancy takes into account the fact that units of different sizes and locations within a residential property have different economic impacts on a residential property’s total possible gross revenue. “Market Rents” used by us in calculating Average Economic Occupancy are based on the current market rates set by the managers of our residential properties based on their experience in renting their residential property’s units and publicly available market data. Actual market rents and trends in such rents for a region as reported by others may vary materially from Market Rents used by us. Market Rents for a period are based on the average Market Rents during that period and do not reflect any impact for cash concessions.
Hotel Net Operating Income
The Boston Marriott Cambridge hotel had net operating income of approximately $2.2 million for the three months ended March 31, 2024, representing an unrealized gainincrease of approximately $0.7 million compared to the three months ended March 31, 2023.
The following reflects our occupancy and rate information for the Boston Marriott Cambridge hotel for the three months ended March 31, 2024 and 2023.
20242023
Change (%)
Occupancy71.0 %61.3 %15.8 %
Average daily rate$254.86 $261.52 (2.5)%
REVPAR$181.05 $160.41 12.9 %
Other Operating Revenue and Expense Items
Development and Management Services Revenue
Development and management services revenue decreased by approximately $2.8 million for the three months ended March 31, 2024 compared to 2023. Development services revenue and management services revenue decreased by approximately $1.2 million and $1.6 million, respectively. The decrease in development services revenue was primarily related to a decrease in fees associated with a tenant improvement project in New York City. The decrease in management services revenue was primarily related to a decrease in property and asset management fees earned from an unconsolidated joint venture in the Los Angeles region which we acquired the joint venture partner’s interest in December 2023.
General and Administrative Expense
General and administrative expense decreased by approximately $5.8 million for the three months ended March 31, 2024 compared to 2023 primarily due to a decrease in compensation expense of approximately $6.1 million, partially offset by an approximately $0.3 million dueincrease in other general and administrative expenses. The decrease in compensation expense related to the observable changesan approximately $6.7 million decrease in other compensation expenses partially offset by an approximately $0.6 million increase in the fair value of the investments.our deferred compensation plan.
Interest Expense
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Interest expense increased by approximately $107.3 million for the nine months ended September 30, 2023 compared to 2022, as detailed below.
ComponentChange in interest expense for the nine months ended September 30, 2023 compared to September 30, 2022
(in thousands)
Increases to interest expense due to:
Increase in interest associated with unsecured term loans and the unsecured credit facility, net$39,236 
Issuance of $750 million in aggregate principal of 6.750% senior notes due 2027 on November 17, 202238,025 
Issuance of $750 million in aggregate principal of 6.500% senior notes due 2034 on May 15, 202318,338 
Increase in interest due to finance lease for one in-service property7,377 
Amortization expense of financing fees primarily related to unsecured term loan2,661 
Decrease in capitalized interest related to development projects1,998 
Other interest expense (excluding senior notes)937 
Total increases to interest expense108,572 
Decrease to interest expense due to:
Repayment of $500 million in aggregate principal of 3.125% senior notes due 2023 on September 1, 2023(1,296)
Total decrease to interest expense(1,296)
Total change in interest expense$107,276 
Interest expenseWages directly related to the development of rental properties isare capitalized and included in real estate assets on our Consolidated Balance Sheets and amortized over the useful lives of the real estateapplicable asset or lease term. As portions of properties are placed in-service, we cease capitalizing interest on that portion and interest is then expensed. Interest capitalizedCapitalized wages for the ninethree months ended September 30,March 31, 2024 and 2023 and 2022 waswere approximately $30.8$4.1 million and $40.0$4.5 million, respectively. These costs are not included in the interestgeneral and administrative expenses discussed above.
Transaction Costs
Transaction costs decreased by approximately $0.4 million for the three months ended March 31, 2024 compared to 2023 due primarily to decreased costs incurred in connection with the pursuit and formation of new joint ventures during the three months ended March 31, 2023, that did not recur in 2024. In general, transaction costs relating to the formation of new joint ventures and the pursuit of other transactions are expensed as incurred.
Depreciation and Amortization Expense
Depreciation expense referenced above.may differ between BXP and BPLP as a result of previously applied acquisition accounting by BXP for the issuance of common stock in connection with non-sponsor OP Unit redemptions by BPLP.  This accounting resulted in a step-up of the real estate assets at BXP that was allocated to certain properties.  The difference between the real estate assets of BXP as compared to BPLP for certain properties having an allocation of the real estate step-up will result in a corresponding difference in depreciation expense. For additional information see the Explanatory Note that immediately follows the cover page of this Quarterly Report on Form 10-Q.
BXP
Depreciation and amortization expense increased by approximately $10.0 million for the three months ended March 31, 2024 compared to 2023, as detailed below.
PortfolioDepreciation and Amortization for the three months ended March 31,
20242023Change
(in thousands)
Same Property Portfolio$198,939 $193,775 $5,164 
Properties Acquired Portfolio14,141 — 14,141 
Properties Placed In-Service Portfolio5,075 1,783 3,292 
Properties in or Held for Development or Redevelopment Portfolio (1)561 13,176 (12,615)
$218,716 $208,734 $9,982 
______________
At September(1) 30, 2023, our variable rate debt consisted of BPLP’s $1.815 billion revolving credit facility (the “Revolving Facility”) under its 2021 Credit Facility and $1.2 billion 2023 Unsecured Term Loan. As of September 30,During the three months ended March 31, 2023, the Revolving Facility did not haveKendall Center Blue Parking Garage was taken out of service and demolished to support the development of 290 Binney Street, an approximately 566,000 net rentable square foot laboratory/life sciences project in Cambridge, Massachusetts. As a balance outstanding andresult, during the three months ended March 31, 2023, Unsecured Term Loan had $1.2 billion outstanding. On May 2, 2023, BPLP entered into four interest rate swap contracts with notional amounts aggregating $1.2 billion to effectively fix Term SOFR, the reference ratewe recorded approximately $0.8 million of accelerated depreciation expense for the 2023 Unsecured Term Loan, at a weighted-average ratedemolition of 4.6420%the garage, of which approximately $0.2 million related to the step-up of real estate assets.
BPLP
Depreciation and amortization expense increased by approximately $10.1 million for the period commencing on May 4,three months ended March 31, 2024 compared to 2023, and ending on May 16, 2024. For a summary of our consolidated debt as of September 30, 2023 refer to the heading “Liquidity and Capital Resources—Debt Financing” within “Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations.detailed below.
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Noncontrolling Interests
PortfolioDepreciation and Amortization for the three months ended March 31,
20242023Change
(in thousands)
Same Property Portfolio$197,242 $192,093 $5,149 
Properties Acquired Portfolio14,141 — 14,141 
Properties Placed In-Service Portfolio5,075 1,783 3,292 
Properties in or Held for Development or Redevelopment Portfolio (1)561 12,996 (12,435)
$217,019 $206,872 $10,147 
______________
(1)During the three months ended March 31, 2023, the Kendall Center Blue Parking Garage was taken out of service and demolished to support the development of 290 Binney Street, an approximately 566,000 net rentable square foot laboratory/life sciences project in Property PartnershipsCambridge, Massachusetts. As a result, during the three months ended March 31, 2023, we recorded approximately $0.6 million of accelerated depreciation expense for the demolition of the garage.
Noncontrolling interestsDirect Reimbursements of Payroll and Related Costs From Management Services Contracts and Payroll and Related Costs From Management Service Contracts
We have determined that amounts reimbursed for payroll and related costs received from third parties in property partnershipsconnection with management services contracts should be reflected on a gross basis instead of on a net basis as we have determined that we are the principal under these arrangements. We anticipate that these two financial statement line items will generally offset each other.
Other Income and Expense Items
Income (Loss) from Unconsolidated Joint Ventures
For the three months ended March 31, 2024 compared to 2023, income (loss) from unconsolidated joint ventures increased by approximately $4.4$26.8 million forprimarily due to an approximately $21.8 million gain on consolidation related to the nineacquisition of our joint venture partner’s economic interest in the joint venture that owns 901 New York Avenue during the three months ended September 30, 2023 compared to 2022, as detailed below.
PropertyNoncontrolling Interests in Property Partnerships for the nine months ended September 30,
20232022Change
(in thousands)
767 Fifth Avenue (the General Motors Building)$9,770 $9,338 $432 
Times Square Tower (1)16,737 15,394 1,343 
601 Lexington Avenue (2)11,188 9,281 1,907 
100 Federal Street9,732 9,814 (82)
Atlantic Wharf Office Building11,910 11,069 841 
343 Madison Avenue (3)— — — 
$59,337 $54,896 $4,441 
______________
(1)The increase was primarily attributable to an increase in lease revenue from our clients.
(2)The increase was primarily attributable to an increase in lease revenue from our clients.
(3)343 Madison Avenue is held for future developmentMarch 31, 2024 (See Notes 4 and 9Note 5 to the Consolidated Financial Statements).
Noncontrolling Interest—Common Units of the Operating PartnershipInterest and Other Income (Loss)
For BXP, noncontrolling interest—common units of the Operating Partnership decreasedInterest and other income (loss) increased by approximately $74.2$3.6 million for the nine months ended September 30, 2023 compared to 2022 due primarily to a decrease in allocable income, which was the result of recognizing a greater gain on sales of real estate amount during 2022. Due to our ownership structure, there is no corresponding line item on BPLP’s financial statements.
Results of Operations for the Three Months Ended September 30, 2023 and 2022
Net income (loss) attributable to Boston Properties, Inc. and net income (loss) attributable to Boston Properties Limited Partnership decreased approximately $472.8 million and $526.3 million, respectively, for the three months ended September 30, 2023March 31, 2024 compared to 2022, as detailed2023, due primarily to an increase in the following tables and for the reasons discussed below under the heading “Comparison of the three months ended September 30, 2023 to the three months ended September 30, 2022” within “Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations.interest income from increased interest earned on our deposits.
The following are reconciliations of Net Income (Loss) Attributable to Boston Properties, Inc. to Net Operating Income and Net Income (Loss) Attributable to Boston Properties Limited Partnership to Net Operating IncomeGains from Investments in Securities
Gain from investments in securities for the three months ended September 30,March 31, 2024 and 2023 related to investments that we have made to reduce our market risk relating to deferred compensation plans that we maintain for BXP’s officers and 2022. Forformer non-employee directors. Under the deferred compensation plans, each officer or non-employee director who is eligible to participate is permitted to defer a detailed discussionportion of NOI, including the reasons management believes NOIofficer’s current income or the non-employee director’s compensation on a pre-tax basis and receive a tax-deferred return on these deferrals based on the performance of specific investments selected by the officer or non-employee director. In order to reduce our market risk relating to these plans, we typically acquire, in a separate account that is usefulnot restricted as to investors, see page 71.its use, similar or identical investments as those selected by each officer or non-employee director. This enables us to generally match our liabilities to BXP’s officers or former non-employee directors under our deferred compensation plans with equivalent assets and thereby limit our market risk. The performance of these investments is recorded as gains from investments in securities. During the three months ended March 31, 2024 and 2023, we recognized gains of approximately $2.3 million and $1.7 million, respectively, on these investments. By comparison, our general and administrative expense increased by approximately $2.3 million and $1.7 million during the three months ended March 31, 2024 and 2023, respectively, as a result of increases in our liability under our deferred compensation plans that was associated with the performance of the specific investments selected by officers and former non-employee directors of BXP participating in the plans.
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BXP
Three months ended September 30,
20232022Increase/
(Decrease)
%
Change
(in thousands)
Net Income (Loss) Attributable to Boston Properties, Inc.$(111,826)$360,977 $(472,803)(130.98)%
Net (Income) Loss Attributable to Noncontrolling Interests:
Noncontrolling interest—common units of the Operating Partnership(12,626)40,883 (53,509)(130.88)%
Noncontrolling interests in property partnerships20,909 18,801 2,108 11.21 %
Net Income (Loss)(103,543)420,661 (524,204)(124.61)%
Other Expenses:
Add:
Interest expense147,812 111,846 35,966 32.16 %
Unrealized loss on non-real estate investment51 — 51 100.00 %
Losses from investments in securities925 1,571 (646)(41.12)%
Loss from unconsolidated joint ventures247,556 3,524 244,032 6,924.86 %
Other Income:
Less:
Interest and other income (loss)20,715 3,728 16,987 455.66 %
Gains on sales of real estate517 262,345 (261,828)(99.80)%
Other Expenses:
Add:
Depreciation and amortization expense207,435 190,675 16,760 8.79 %
Transaction costs751 1,650 (899)(54.48)%
Payroll and related costs from management services contracts3,906 3,900 0.15 %
General and administrative expense31,410 32,519 (1,109)(3.41)%
Other Revenue:
Less:
Direct reimbursements of payroll and related costs from management services contracts3,906 3,900 0.15 %
Development and management services revenue9,284 7,465 1,819 24.37 %
Net Operating Income$501,881 $488,908 $12,973 2.65 %
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BPLP
Three months ended September 30,
20232022Increase/
(Decrease)
%
Change
(in thousands)
Net Income (Loss) Attributable to Boston Properties Limited Partnership$(122,696)$403,578 $(526,274)(130.40)%
Net Income Attributable to Noncontrolling Interests:
Noncontrolling interests in property partnerships20,909 18,801 2,108 11.21 %
Net Income (Loss)(101,787)422,379 (524,166)(124.10)%
Other Expenses:
Add:
Interest expense147,812 111,846 35,966 32.16 %
Unrealized loss on non-real estate investment51 — 51 100.00 %
Losses from investments in securities925 1,571 (646)(41.12)%
Loss from unconsolidated joint ventures247,556 3,524 244,032 6,924.86 %
Other Income:
Less:
Interest and other income (loss)20,715 3,728 16,987 455.66 %
Gains on sales of real estate517 262,357 (261,840)(99.80)%
Other Expenses:
Add:
Depreciation and amortization expense205,679 188,969 16,710 8.84 %
Transaction costs751 1,650 (899)(54.48)%
Payroll and related costs from management services contracts3,906 3,900 0.15 %
General and administrative expense31,410 32,519 (1,109)(3.41)%
Other Revenue:
Less:
Direct reimbursements of payroll and related costs from management services contracts3,906 3,900 0.15 %
Development and management services revenue9,284 7,465 1,819 24.37 %
Net Operating Income$501,881 $488,908 $12,973 2.65 %
NOI is a non-GAAP financial measure equal to net income (loss) attributable to Boston Properties, Inc. and net income (loss) attributable to Boston Properties Limited Partnership, as applicable, the most directly comparable GAAP financial measures, plus (1) net (income) loss attributable to noncontrolling interests, interest expense, unrealized loss on non-real estate investment, losses from investments in securities, loss from unconsolidated joint ventures, depreciation and amortization expense, transaction costs, payroll and related costs from management services contracts and corporate general and administrative expense less (2) interest and other income (loss), gains on sales of real estate, direct reimbursements of payroll and related costs from management services contracts and development and management services revenue. We use NOI internally as a performance measure and believe it provides useful information to investors regarding our results of operations and financial condition because, when compared across periods, it reflects the impact on operations from trends in occupancy rates, rental rates, operating costs and acquisition and development activity on an unleveraged basis, providing perspective not immediately apparent from net income (loss) attributable to Boston Properties, Inc. and net income (loss) attributable to Boston Properties Limited Partnership. For example, interest expense is not necessarily linked to the operating performance of a real estate asset and is often incurred at the corporate level as opposed to the property level. Similarly, interest expense may be incurred at the property level even though the financing proceeds may be used at the corporate level (e.g., used for other investment activity). In addition, depreciation and amortization expense, because of historical cost accounting and useful life estimates, may distort operating performance measures at the property level. NOI presented by us may not be comparable to NOI reported by other REITs or real estate companies that define NOI differently.
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We believe that in order to understand our operating results, NOI should be examined in conjunction with net income (loss) attributable to Boston Properties, Inc. and net income (loss) attributable to Boston Properties Limited Partnership as presented in our Consolidated Financial Statements. NOI should not be considered as a substitute for net income (loss) attributable to Boston Properties, Inc. or net income (loss) attributable to Boston Properties Limited Partnership (determined in accordance with GAAP) or any other GAAP financial measures and should only be considered together with and as a supplement to our financial information prepared in accordance with GAAP.
Comparison of the three months ended September 30, 2023 to the three months ended September 30, 2022
The table below shows selected operating information for the Same Property Portfolio and the Total Property Portfolio. The Same Property Portfolio consists of 128 properties totaling approximately 39.5 million net rentable square feet, excluding unconsolidated joint ventures. The Same Property Portfolio includes properties acquired or placed in-service on or prior to July 1, 2022 and owned and in-service through September 30, 2023. The Total Property Portfolio includes the effects of the other properties either acquired, placed in-service, in or held for development or redevelopment after July 1, 2022 or disposed of on or prior to September 30, 2023. This table includes a reconciliation from the Same Property Portfolio to the Total Property Portfolio by also providing information for the three months ended September 30, 2023 and 2022 with respect to the properties that were acquired, placed in-service, in or held for development or redevelopment or sold.

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 Same Property PortfolioProperties
Acquired Portfolio
Properties
Placed In-Service
Portfolio
Properties in or Held for
Development or
Redevelopment
Portfolio
Properties Sold PortfolioTotal Property Portfolio
20232022Increase/
(Decrease)
%
Change
2023202220232022202320222023202220232022Increase/
(Decrease)
%
Change
(dollars in thousands)
Rental Revenue: (1)
Lease Revenue (Excluding Termination Income)$717,307 $705,281 $12,026 1.71 %$10,225 $1,622 $24,278 $9,896 $611 $(212)$551 $6,855 $752,972 $723,442 $29,530 4.08 %
Termination Income2,347 1,980 367 18.54 %— — 217 — — — — — 2,564 1,980 584 29.49 %
Lease Revenue719,654 707,261 12,393 1.75 %10,225 1,622 24,495 9,896 611 (212)551 6,855 755,536 725,422 30,114 4.15 %
Parking and Other Revenue29,834 24,865 4,969 19.98 %— — 450 — — 2,583 — 199 30,284 27,647 2,637 9.54 %
Total Rental Revenue (1)749,488 732,126 17,362 2.37 %10,225 1,622 24,945 9,896 611 2,371 551 7,054 785,820 753,069 32,751 4.35 %
Real Estate Operating Expenses284,483 266,517 17,966 6.74 %1,007 208 8,758 3,714 47 1,979 159 2,260 294,454 274,678 19,776 7.20 %
Net Operating Income, Excluding Residential and Hotel465,005 465,609 (604)(0.13)%9,218 1,414 16,187 6,182 564 392 392 4,794 491,366 478,391 12,975 2.71 %
Residential Net Operating Income (2)6,051 5,477 574 10.48 %— — — — — — — 1,839 6,051 7,316 (1,265)(17.29)%
Hotel Net Operating Income (2)4,464 3,201 1,263 39.46 %— — — — — — — — 4,464 3,201 1,263 39.46 %
Net Operating Income$475,520 $474,287 $1,233 0.26 %$9,218 $1,414 $16,187 $6,182 $564 $392 $392 $6,633 $501,881 $488,908 $12,973 2.65 %
_______________
(1)Rental Revenue is equal to Revenue less Development and Management Services Revenue and Direct Reimbursements of Payroll and Related Costs from Management Services Revenue per the Consolidated Statements of Operations, excluding the residential and hotel revenue that is noted below. We use Rental Revenue internally as a performance measure and in calculating other non-GAAP financial measures (e.g., NOI), which provides investors with information regarding our performance that is not immediately apparent from the comparable non-GAAP measures and allows investors to compare operating performance between periods.
(2)For a detailed discussion of NOI, including the reasons management believes NOI is useful to investors, see page 71. Residential Net Operating Income for the three months ended September 30, 2023 and 2022 is comprised of Residential Revenue of $11,789 and $14,340 less Residential Expenses of $5,738 and $7,024, respectively. Hotel Net Operating Income for the three months ended September 30, 2023 and 2022 is comprised of Hotel Revenue of $13,484 and $11,749 less Hotel Expenses of $9,020 and $8,548, respectively, per the Consolidated Statements of Operations.
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Same Property Portfolio
Lease Revenue (Excluding Termination Income)
Lease revenue (excluding termination income) from the Same Property Portfolio increaseddecreased by approximately $12.0$3.6 million for the three months ended September 30, 2023March 31, 2024 compared to 2022.2023. The increasedecrease was a result of our average occupancy decreasing from 90.2% to 89.3%, resulting in a decrease of approximately $7.1 million, partially offset by our average revenue per square foot increasing by approximately $1.80,$0.25, contributing approximately $18.1 million, partially offset by an approximately $6.1 million decrease due to our average occupancy decreasing from 91.1% to 90.3%.$3.5 million.
Termination Income
Termination income increased by approximately $0.4$1.6 million for the three months ended September 30, 2023March 31, 2024 compared to 2022.2023.
Termination income for the three months ended September 30, 2023March 31, 2024 related to nineten clients across the Same Property Portfolio and totaled approximately $2.3 million, which was primarily related to clients that terminated leases early in Seattle.
Termination income for the three months ended September 30, 2022 related to nine clients across the Same Property Portfolio and totaled approximately $2.0$1.8 million, which was primarily related to clients that terminated leases early in San Francisco.Francisco, California.
Termination income for the three months ended March 31, 2023 related to seven clients across the Same Property Portfolio and totaled approximately $0.2 million, which was primarily related to clients that terminated leases early in New York City.
Parking and Other Revenue
Parking and other revenue increased by approximately $5.0$5.1 million for the three months ended September 30, 2023March 31, 2024 compared to 2022.2023. Parking and other revenue increased by approximately $1.4$0.5 million and $3.6$4.6 million, respectively. The increase in parking revenue was primarily due to an increase in transient and monthly parking. The increase in other revenue was primarily associated with the View Boston observatory, which was completed and placed in-service on June 1, 2023.
Real Estate Operating Expenses
Real estate operating expenses from the Same Property Portfolio increased by approximately $18.0$12.5 million, or 6.7%4.5%, for the three months ended September 30, 2023March 31, 2024 compared to 2022,2023, due primarily to increases in real estate taxesrepairs and maintenance of approximately $4.2$3.7 million, or 3.2%8.4%, and other real estate operating expenses of approximately $10.5$4.9 million, or 7.7%2.1%. The increase in real estate taxesrepairs and maintenance was primarily in Boston. In addition, there was approximately $3.3$3.9 million related to the marketing and operating expenses associated with the View Boston observatory, which was completed and placed in-service on June 1, 2023.
Properties Acquired Portfolio
The table below lists the properties acquired between JulyJanuary 1, 20222023 and September 30, 2023.March 31, 2024. Rental revenue and real estate operating expenses increased by approximately $8.6$28.2 million and $0.8$9.6 million, respectively, for the three months ended September 30, 2023March 31, 2024 compared to 2022,2023, as detailed below.
Square FeetRental RevenueReal Estate Operating Expenses
Square FeetSquare FeetRental RevenueReal Estate Operating Expenses
NameNameDate acquiredSquare Feet20232022Change20232022ChangeNameDate acquired20242023Change20242023Change
(dollars in thousands)
125 BroadwaySeptember 16, 2022271,000 $10,225 $1,622 $8,603 $1,007 $208 $799 
271,000 $10,225 $1,622 $8,603 $1,007 $208 $799 
(dollars in thousands)(dollars in thousands)
Santa Monica Business Park (1)
901 New York Avenue
1,706,635
______________
(1)Rental revenue for the three months ended March 31, 2024 includes approximately $0.2 million of termination income.

Properties Placed In-Service Portfolio
The table below lists the properties that were placed in-service or partially placed in-service between JulyJanuary 1, 20222023 and September 30, 2023.March 31, 2024. Rental revenue and real estate operating expenses from our Properties Placed In-Service Portfolio increased by approximately $15.0$7.8 million and $5.0$3.2 million, respectively, for the three months ended September 30, 2023March 31, 2024 compared to 2022,2023, as detailed below.
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Quarter Initially Placed In-ServiceQuarter Fully Placed In-ServiceRental RevenueReal Estate Operating Expenses
NameSquare Feet20232022Change20232022Change
(dollars in thousands)
Reston NextFourth Quarter, 2021Fourth Quarter, 20221,063,296 $11,605 $9,051 $2,554 $4,178 $2,830 $1,348 
2100 Pennsylvania AvenueSecond Quarter, 2022Second Quarter, 2023475,849 5,330 160 5,170 2,592 288 2,304 
880 Winter Street (1)Third Quarter, 2022Fourth Quarter, 2022243,618 6,505 684 5,821 1,443 376 1,067 
140 Kendrick Street - Building AThird Quarter, 2023Third Quarter, 2023104,166 1,505 1,504 545 220 325 
180 CityPointThird Quarter, 2023N/A329,000 — — — — — — 
2,215,929 $24,945 $9,896 $15,049 $8,758 $3,714 $5,044 
______________
(1)Conversion of a 224,000 square foot office property located in Waltham, Massachusetts to laboratory space. Rental revenue for the three months ended September 30, 2023 includes approximately $0.2 million of termination income.
Quarter Initially Placed In-ServiceQuarter Fully Placed In-ServiceRental RevenueReal Estate Operating Expenses
NameSquare Feet20242023Change20242023Change
(dollars in thousands)
2100 Pennsylvania AvenueSecond Quarter, 2022Second Quarter, 2023475,849 $7,924 $5,141 $2,783 $2,721 $1,727 $994 
140 Kendrick Street - Building AThird Quarter, 2023Third Quarter, 2023104,166 1,925 — 1,925 592 — 592 
180 CityPointThird Quarter, 2023N/A329,000 3,074 — 3,074 1,389 — 1,389 
103 CityPointFourth Quarter, 2023N/A113,000 — — — 261 — 261 
1,022,015 $12,923 $5,141 $7,782 $4,963 $1,727 $3,236 
Properties in or Held for Development or Redevelopment Portfolio
The table below lists the properties that were in or held for development or redevelopment between JulyJanuary 1, 20222023 and September 30, 2023.March 31, 2024. Rental revenue and real estate operating expenses from our Properties in or Held for Development or Redevelopment Portfolio decreased by approximately $1.8$0.2 million and $1.9$2.7 million, respectively, for the three months ended September 30, 2023March 31, 2024 compared to 2022,2023, as detailed below.
Rental RevenueReal Estate Operating Expenses
NameDate Commenced or Held for Development / RedevelopmentSquare Feet20232022Change20232022Change
(dollars in thousands)
760 Boylston StreetSeptember 12, 2022118,000 $— $— $— $— $180 $(180)
105 Carnegie CenterNovember 30, 202273,000 — 298 (298)— 235 (235)
2096 Gaither RoadDecember 1, 202250,000 — 53 (53)35 105 (70)
RTC Next-Hotel (1)December 19, 2022N/A233 — 233 — — — 
Kendall Center Blue Parking Garage (2)January 4, 2023N/A— 2,560 (2,560)(620)290 (910)
300 Binney StreetJanuary 30, 2023236,000 — (1,214)1,214 — 498 (498)
Lexington Office Park (3)March 31, 2023166,779 341 528 (187)507 572 (65)
2098 Gaither Road (3)March 31, 202350,000 37 146 (109)125 99 26 
693,779 $611 $2,371 $(1,760)$47 $1,979 $(1,932)
Rental RevenueReal Estate Operating Expenses
NameDate Commenced or Held for Development / RedevelopmentSquare Feet20242023Change20242023Change
(dollars in thousands)
105 Carnegie Center (1)November 30, 202273,000 $— $— $— $155 $— $155 
Kendall Center Blue Parking Garage (2)January 4, 2023N/A— 25 (25)— 2,277 (2,277)
300 Binney StreetJanuary 30, 2023236,000 — (900)900 — 117 (117)
Shady Grove Innovation District (3)March 31, 2023184,000 (45)631 (676)292 402 (110)
Lexington Office Park (3)March 31, 2023167,000 257 629 (372)417 611 (194)
1050 Winter Street (3)March 31, 2024162,000 30 29 437 627 (190)
822,000 $242 $414 $(172)$1,301 $4,034 $(2,733)
______________
(1)On December 19, 2022,November 30, 2023, we elected to suspend redevelopment. Although no longer in accordance with GAAP, the ground lease that encumbersredevelopment, this property was reclassifiedis not considered “in-service” as a sales-type lease andwe are not actively leasing this property in anticipation of restarting redevelopment in the associated assets were derecognized.future.
(2)The Kendall Center Blue Parking Garage was taken out of service on January 4, 2023 to support the development of 290 Binney Street. Real estate operating expenses for the three months ended September 30,March 31, 2023 included approximately ($0.7)$2.3 million of demolition costs.
(3)A portion of Shady Grove Innovation District, Lexington Office Park and 2098 Gaither Road1050 Winter Street are no longer considered “in-service” because each property’s occupied percentage is less than 50% and we are no longer actively leasing the properties in anticipation of a future development/redevelopment.

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Properties Sold Portfolio
The table below lists the properties we soldShady Grove Innovation District is comprised of three buildings, 2092 and 2098 Gaither Road and 15825 Shady Grove Road that were taken out of service between July 1, 2022March 31, 2023 and September 30, 2023. Rental revenue and real estate operating expenses from our Properties Sold Portfolio decreased by approximately $9.6 million and $3.3 million, respectively, for the three months ended September 30, 2023 compared to 2022, as detailed below.
Rental RevenueReal Estate Operating Expenses
NameDate SoldProperty TypeSquare Feet20232022Change20232022Change
(dollars in thousands)
Office
601 Massachusetts AvenueAugust 30, 2022Office478,667 $— $7,054 $(7,054)$— $2,260 $(2,260)
Total Office478,667 — 7,054 (7,054)— 2,260 (2,260)
Residential
The Avant at Reston Town Center (1)November 8, 2022Residential329,195 551 3,072 (2,521)159 1,233 (1,074)
Total Residential329,195 551 3,072 (2,521)159 1,233 (1,074)
807,862 $551 $10,126 $(9,575)$159 $3,493 $(3,334)
______________
(1)We retained and continue to own approximately 26,000 square feet of ground-level retail space. Rental Revenue and Real Estate Operating Expenses for the three months ended September 30, 2023 represent the ground-level retail space. Rental Revenue and Real Estate Operating Expenses for the three months ended September 30, 2022 represent the entire property and not just the portion sold.March 31, 2024.
Residential Net Operating Income
Net operating income for our residential same properties increased by approximately $0.6$0.7 million for the three months ended September 30, 2023March 31, 2024 compared to 2022.2023.
The following reflects our occupancy and rate information for our residential same properties for the three months ended September 30, 2023March 31, 2024 and 2022.2023.
Average Monthly Rental Rate (1)Average Rental Rate Per Occupied Square FootAverage Physical Occupancy (2)Average Economic Occupancy (3)
Name20232022Change (%)20232022Change (%)20232022Change (%)20232022Change (%)
Proto Kendall Square$3,113 $2,895 7.5 %$5.71 $5.32 7.3 %95.2 %95.6 %(0.4)%94.7 %94.9 %(0.2)%
The Lofts at Atlantic Wharf$4,462 $4,237 5.3 %$4.95 $4.71 5.1 %96.9 %99.6 %(2.7)%96.6 %99.3 %(2.7)%
Signature at Reston$2,726 $2,671 2.1 %$2.82 $2.75 2.5 %95.5 %96.3 %(0.8)%94.9 %95.9 %(1.0)%
The Skylyne$3,509 $3,400 3.2 %$4.45 $4.27 4.2 %93.1 %92.8 %0.3 %91.3 %90.2 %1.2 %
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Average Monthly Rental Rate (1)Average Rental Rate Per Occupied Square FootAverage Physical Occupancy (2)Average Economic Occupancy (3)
Name20242023Change (%)20242023Change (%)20242023Change (%)20242023Change (%)
Proto Kendall Square$3,154 $3,002 5.1 %$5.79 $5.52 4.9 %94.9 %95.4 %(0.5)%94.4 %94.8 %(0.4)%
The Lofts at Atlantic Wharf$4,257 $4,428 (3.9)%$4.70 $4.91 (4.3)%95.0 %95.4 %(0.4)%94.5 %95.4 %(0.9)%
Signature at Reston$2,774 $2,677 3.6 %$2.85 $2.77 2.9 %95.5 %93.7 %1.9 %95.5 %93.1 %2.6 %
The Skylyne$3,478 $3,445 1.0 %$4.37 $4.38 (0.2)%87.9 %91.5 %(3.9)%86.7 %89.3 %(2.9)%
_______________  
(1)Average Monthly Rental Rate is calculated as the average of the quotients obtained by dividing (A) rental revenue as determined in accordance with GAAP, by (B) the number of occupied units for each month within the applicable fiscal period.
(2)Average Physical Occupancy is defined as (1) the average number of occupied units divided by (2) the total number of units, expressed as a percentage.
(3)Average Economic Occupancy is defined as (1) total possible revenue less vacancy loss divided by (2) total possible revenue, expressed as a percentage. Total possible revenue is determined by valuing average occupied units at contract rates and average vacant units at Market Rents. Vacancy loss is determined by valuing vacant units at current Market Rents. By measuring vacant units at their Market Rents, Average Economic Occupancy takes into account the fact that units of different sizes and locations within a residential property have different economic impacts on a residential property’s total possible gross revenue. Market Rents“Market Rents” used by us in calculating Average Economic Occupancy are based on the current market rates set by the managers of our residential properties based on their experience in renting their residential property’s units and publicly available market data. Actual market rents and trends in such rents for a region as reported by others may vary materially from Market Rents used by us. Market Rents for a period are based on the average Market Rents during that period and do not reflect any impact for cash concessions.
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Hotel Net Operating Income
The Boston Marriott Cambridge hotel had net operating income of approximately $4.5$2.2 million for the three months ended September 30, 2023,March 31, 2024, representing an increase of approximately $1.3$0.7 million compared to the three months ended September 30, 2022.March 31, 2023.
The following reflects our occupancy and rate information for the Boston Marriott Cambridge hotel for the three months ended September 30, 2023March 31, 2024 and 2022.2023.
20232022
Change (%)
202420242023
Change (%)
OccupancyOccupancy81.6 %75.8 %7.7 %Occupancy71.0 %61.3 %15.8 %
Average daily rateAverage daily rate$331.37 $328.40 0.9 %Average daily rate$254.86 $$261.52 (2.5)(2.5)%
REVPARREVPAR$270.50 $249.06 8.6 %REVPAR$181.05 $$160.41 12.9 12.9 %
Other Operating Revenue and Expense Items
Development and Management Services Revenue
Development and management services revenue increaseddecreased by approximately $1.8$2.8 million for the three months ended September 30, 2023March 31, 2024 compared to 2022.2023. Development services revenue and management services revenue increaseddecreased by approximately $0.7$1.2 million and $1.1$1.6 million, respectively. The increasedecrease in development management services revenue was primarily related to an increasea decrease in development fees from unconsolidated joint venturesassociated with a tenant improvement project in the Washington, DC region.New York City. The increasedecrease in management services revenue was primarily related to an increasea decrease in property management fees earned from an unconsolidated joint venture in New York City and asset management fees earned from an unconsolidated joint venture in the Los Angeles region.region which we acquired the joint venture partner’s interest in December 2023.
General and Administrative Expense
General and administrative expense decreased by approximately $1.1$5.8 million for the three months ended September 30, 2023March 31, 2024 compared to 20222023 primarily due to decreasesa decrease in compensation expense of approximately $1.3$6.1 million, partially offset by an approximately $0.2$0.3 million increase in other general and administrative expenses. The decrease in compensation expense related to an approximately $0.7$6.7 million decrease in other compensation expenses partially offset by an approximately $0.6 million increase in the value of our deferred compensation plan and an approximately $0.6 million decrease in other compensation expenses.plan.
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Wages directly related to the development of rental properties are capitalized and included in real estate assets on our Consolidated Balance Sheets and amortized over the useful lives of the applicable asset or lease term. Capitalized wages for the three months ended September 30,March 31, 2024 and 2023 and 2022 were approximately $4.4$4.1 million and $3.9$4.5 million, respectively. These costs are not included in the general and administrative expenses discussed above.
Transaction Costs
Transaction costs decreased by approximately $0.9$0.4 million for the three months ended September 30, 2023March 31, 2024 compared to 20222023 due primarily to decreased costs incurred in connection with the pursuit and formation of new joint ventures during the three months ended September 30, 2022,March 31, 2023, that did not recur in 2023.2024. In general, transaction costs relating to the formation of new joint ventures and the pursuit of other transactions are expensed as incurred.
Depreciation and Amortization Expense
Depreciation expense may differ between BXP and BPLP as a result of previously applied acquisition accounting by BXP for the issuance of common stock in connection with non-sponsor OP Unit redemptions by BPLP.  This accounting resulted in a step-up of the real estate assets at BXP that was allocated to certain properties.  The difference between the real estate assets of BXP as compared to BPLP for certain properties having an allocation of the real estate step-up will result in a corresponding difference in depreciation expense. For additional information see the Explanatory Note that immediately follows the cover page of this Quarterly Report on Form 10-Q.
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BXP
Depreciation and amortization expense increased by approximately $16.8$10.0 million for the three months ended September 30, 2023March 31, 2024 compared to 2022,2023, as detailed below.
PortfolioPortfolioDepreciation and Amortization for the three months ended September 30,PortfolioDepreciation and Amortization for the three months ended March 31,
20232022Change20242023Change
(in thousands)
(in thousands)(in thousands)
Same Property PortfolioSame Property Portfolio$190,435 $179,829 $10,606 
Properties Acquired PortfolioProperties Acquired Portfolio6,423 1,007 5,416 
Properties Placed In-Service PortfolioProperties Placed In-Service Portfolio10,228 4,626 5,602 
Properties in or Held for Development or Redevelopment Portfolio237 3,352 (3,115)
Properties Sold Portfolio112 1,861 (1,749)
$207,435 $190,675 $16,760 
Properties in or Held for Development or Redevelopment Portfolio (1)
$
______________
(1)During the three months ended March 31, 2023, the Kendall Center Blue Parking Garage was taken out of service and demolished to support the development of 290 Binney Street, an approximately 566,000 net rentable square foot laboratory/life sciences project in Cambridge, Massachusetts. As a result, during the three months ended March 31, 2023, we recorded approximately $0.8 million of accelerated depreciation expense for the demolition of the garage, of which approximately $0.2 million related to the step-up of real estate assets.
BPLP
Depreciation and amortization expense increased by approximately $16.7$10.1 million for the three months ended September 30, 2023March 31, 2024 compared to 2022,2023, as detailed below.
PortfolioDepreciation and Amortization for the three months ended September 30,
20232022Change
(in thousands)
Same Property Portfolio$188,679 $178,123 $10,556 
Properties Acquired Portfolio6,423 1,007 5,416 
Properties Placed In-Service Portfolio10,228 4,626 5,602 
Properties in or Held for Development or Redevelopment Portfolio237 3,352 (3,115)
Properties Sold Portfolio112 1,861 (1,749)
$205,679 $188,969 $16,710 
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PortfolioDepreciation and Amortization for the three months ended March 31,
20242023Change
(in thousands)
Same Property Portfolio$197,242 $192,093 $5,149 
Properties Acquired Portfolio14,141 — 14,141 
Properties Placed In-Service Portfolio5,075 1,783 3,292 
Properties in or Held for Development or Redevelopment Portfolio (1)561 12,996 (12,435)
$217,019 $206,872 $10,147 
______________
(1)During the three months ended March 31, 2023, the Kendall Center Blue Parking Garage was taken out of service and demolished to support the development of 290 Binney Street, an approximately 566,000 net rentable square foot laboratory/life sciences project in Cambridge, Massachusetts. As a result, during the three months ended March 31, 2023, we recorded approximately $0.6 million of accelerated depreciation expense for the demolition of the garage.
Direct Reimbursements of Payroll and Related Costs From Management Services Contracts and Payroll and Related Costs From Management Service Contracts
We have determined that amounts reimbursed for payroll and related costs received from third parties in connection with management services contracts should be reflected on a gross basis instead of on a net basis as we have determined that we are the principal under these arrangements. We anticipate that these two financial statement line items will generally offset each other.
Other Income and Expense Items
LossIncome (Loss) from Unconsolidated Joint Ventures
For the three months ended September 30, 2023March 31, 2024 compared to 2022, loss2023, income (loss) from unconsolidated joint ventures increased by approximately $244.0$26.8 million primarily due to non-cash impairment charges related to our investments in 360 Park Avenue South, 200 Fifth Avenue, Platform 16, and Safeco Plaza of approximately $54.0 million, $33.4 million, $155.2 million, and $29.9 million, respectively, partially offset by an approximately $35.8$21.8 million gain on investmentconsolidation related to the acquisition of our Metropolitan Square joint venture partner’s economic interest in the joint venture that owns 901 New York Avenue during the three months ended March 31, 2024 (See Note 5 to the Consolidated Financial Statements).
Gains on Sales of Real Estate
Gains on sales of real estate may differ between BXP and BPLP as a result of previously applied acquisition accounting by BXP for the issuance of common stock in connection with non-sponsor OP Unit redemptions by BPLP. This accounting resulted in a step-up of the real estate assets at BXP that was allocated to certain properties. The difference between the real estate assets of BXP as compared to BPLP for certain properties having an allocation of the real estate step-up will result in a corresponding difference in the gains on sales of real
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estate when those properties are sold. For additional information, see the Explanatory Note that immediately follows the cover page of this Quarterly Report on Form 10-Q.
BXP
Gains on sales of real estate decreased by approximately $261.8 million for the three months ended September 30, 2023 compared to 2022, as detailed below.
NameDate SoldProperty TypeSquare FeetSale PriceNet Cash ProceedsGain on Sale of Real Estate
(dollars in millions)
2023
N/A$— $— $— (1)
2022
601 Massachusetts AvenueAugust 30, 2022Office478,667 $531.0 $512.3 $237.4 
Broadrun Land ParcelSeptember 15, 2022LandN/A27.0 25.6 24.4 
$558.0 $537.9 $261.8 (2)
___________
(1)Excludes approximately $0.5 million of gains on sales of real estate recognized during the three months ended September 30, 2023 related to gain amounts from sales of real estate occurring in prior periods.
(2)Excludes approximately $0.5 million of gains on sales of real estate recognized during the three months ended September 30, 2022 related to gain amounts from sales of real estate occurring in prior periods.
BPLP
Gains on sales of real estate decreased by approximately $261.8 million for the three months ended September 30, 2023 compared to 2022, as detailed below.
NameDate SoldProperty TypeSquare FeetSale PriceNet Cash ProceedsGain on Sale of Real Estate
(dollars in millions)
2023
N/A$— $— $— (1)
2022
601 Massachusetts AvenueAugust 30, 2022Office478,667 $531.0 $512.3 $237.5 
Broadrun Land ParcelSeptember 15, 2022LandN/A27.0 25.6 24.4 
$558.0 $537.9 $261.9 (2)
___________
(1)Excludes approximately $0.5 million of gains on sales of real estate recognized during the three months ended September 30, 2023 related to gain amounts from sales of real estate occurring in prior periods.
(2)Excludes approximately $0.4 million of gains on sales of real estate recognized during the three months ended September 30, 2022 related to gain amounts from sales of real estate occurring in prior periods.
Interest and Other Income (Loss)
Interest and other income (loss) increased by approximately $17.0$3.6 million for the three months ended September 30, 2023March 31, 2024 compared to 2022,2023, due primarily to an increase of approximately $17.1 million in interest income from increased interest earned on our deposits partially offset by an increase in our allowance for current expected credit losses of approximately $0.1 million.deposits.
LossesGains from Investments in Securities
LossesGain from investments in securities for the three months ended September 30,March 31, 2024 and 2023 and 2022 related to investments that we have made to reduce our market risk relating to deferred compensation plans that we maintain for BXP’s officers and former non-employee directors. Under the deferred compensation plans, each officer or non-employee director who is eligible to participate is permitted to defer a portion of the officer’s current income or the
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non-employee director’s compensation on a pre-tax basis and receive a tax-deferred return on these deferrals based on the performance of specific investments selected by the officer or non-employee director. In order to reduce our market risk relating to these plans, we typically acquire, in a separate account that is not restricted as to its use, similar or identical investments as those selected by each officer or non-employee director. This enables us to generally match our liabilities to BXP’s officers or former non-employee directors under our deferred compensation plans with equivalent assets and thereby limit our market risk. The performance of these investments is recorded as lossesgains from investments in securities. During the three months ended September 30,March 31, 2024 and 2023, and 2022, we recognized lossesgains of approximately $0.9$2.3 million and $1.6$1.7 million, respectively, on these investments. By comparison, our general and administrative expense decreasedincreased by approximately $0.9$2.3 million and $1.6$1.7 million during the three months ended September 30,March 31, 2024 and 2023, and 2022, respectively, as a result of decreasesincreases in our liability under our deferred compensation plans that was associated with the performance of the specific investments selected by officers and former non-employee directors of BXP participating in the plans.
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Unrealized LossGain on Non-Real Estate Investment
During the year ended December 31, 2022, we began investingWe invest in non-real estate investments, which are primarily environmentally-focused investment funds. As a result, for the three months ended September 30,March 31, 2024 and 2023, we recognized an unrealized lossgain of approximately $51,000 $0.4 million and $0.3 million, respectively,due to the observable changes in the fair value of the investments.
Impairment Loss
At March 31, 2024, we evaluated the expected hold period for a portion of our Shady Grove property located in Rockville, Maryland. Based on a shorter-than-expected hold period, we reduced the carrying value of a portion of the property that we anticipate selling to a third party developer to its estimated fair value at March 31, 2024. As a result, each of BXP and BPLP recognized an impairment loss of approximately $13.6 million. Our estimated fair value was based on Level 3 inputs as defined in ASC 820 and on a pending offer from a third party.
Interest Expense
Interest expense increased by approximately $36.0$27.7 million for the three months ended September 30, 2023March 31, 2024 compared to 2022,2023, as detailed below.
ComponentChange in interest expense for the three months ended September 30, 2023March 31, 2024 compared to September 30, 2022March 31, 2023
 (in thousands)
Increases to interest expense due to:
Issuance of $750 million in aggregate principal of 6.750% senior notes due 2027 on November 17, 2022New mortgage loan financings (1)$12,67520,598 
Issuance of $750 million in aggregate principal of 6.500% senior notes due 2034 on May 15, 202312,22512,227 
Increase in interest associated with unsecured term loans and unsecured credit facility, net9,347 
Increase in interest due to finance lease for one in-service propertyleases2,8792,291 
Decrease in capitalized interest related to development projects1,262 
Amortization expense of financing fees primarily related to unsecured term loan348481 
Other interest expense (excluding senior notes)66 
Total increases to interest expense37,54036,859 
Decreases to interest expense due to:
Repayment of $700 million in aggregate principal of 3.800% senior notes due 2024 on February 1, 2024(4,471)
Repayment of $500 million in aggregate principal of 3.125% senior notes due 2023 on September 1, 2023(1,301)(3,991)
IncreaseDecrease in capitalized interest related to development projectsassociated with unsecured term loans and the unsecured credit facility, net(273)(709)
Other interest expense (excluding senior notes)(4)
Total decreases to interest expense(1,574)(9,175)
Total change in interest expense$35,96627,684 
______________
(1) Consists of the mortgage loan collateralized by the 325 Main Street, 355 Main Street, 90 Broadway and Cambridge East Garage (also known as Kendall Center Green Garage) properties located in Cambridge, Massachusetts, and the mortgage loan and fair value debt and swap adjustments for Santa Monica Business Park located in Santa Monica, California and 901 New York Avenue in Washington, DC (See Note 6 to the Consolidated Financial Statements).
Interest expense directly related to the development of rental properties is capitalized and included in real estate assets on our Consolidated Balance Sheets and amortized over the useful lives of the real estate or lease term. As portions of properties are placed in-service, we cease capitalizing interest on that portion and interest is then expensed. Interest capitalized for the three months ended September 30,March 31, 2024 and 2023 and 2022 was approximately $9.7$9.4 million and $12.2$10.6 million, respectively. These costs are not included in the interest expense referenced above.
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At September 30, 2023,March 31, 2024, our variable rate debt consisted of (1) BPLP’s $1.815 billion Revolving Facility under its 2021 Credit Facility, and(2) BPLP’s $1.2 billion 2023 Unsecured Term Loan.Loan and (3) $900 million of mortgage notes collateralized by Santa Monica Business Park and our 325 Main Street, 355 Main Street, 90 Broadway and Kendall Center Green Garage properties. As of September 30, 2023,March 31, 2024, the Revolving2021 Credit Facility did not have a balance outstanding andoutstanding. The other variable rate debt has all been hedged with interest rates swaps to fix SOFR for all, or a portion of the 2023 Unsecured Term Loan had $1.2 billion outstanding. On May 2, 2023, BPLP entered into four interest rate swap contracts with notional amounts aggregating $1.2 billion to effectively fix Term SOFR, the reference rate for the 2023 Unsecured Term Loan, at a weighted-average rate of 4.6420% for the period commencing on May 4, 2023 and ending on May 16, 2024.applicable debt term. For a summary of our consolidated debt as of September 30, 2023March 31, 2024 refer to the heading “Liquidity and Capital Resources—Debt Financing” within “Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations.
Noncontrolling Interests in Property Partnerships
Noncontrolling interests in property partnerships increaseddecreased by approximately $2.1$1.4 million for the three months ended September 30, 2023March 31, 2024 compared to 2022,2023, as detailed below.
PropertyPropertyNoncontrolling Interests in Property Partnerships for the three months ended September 30,PropertyNoncontrolling Interests in Property Partnerships for the three months ended March 31,
20232022Change20242023Change
(in thousands)
(in thousands)(in thousands)
767 Fifth Avenue (the General Motors Building)767 Fifth Avenue (the General Motors Building)$3,589 $3,289 $300 
Times Square Tower (1)5,639 4,911 728 
601 Lexington Avenue3,935 3,630 305 
Times Square Tower
601 Lexington Avenue (1)
100 Federal Street100 Federal Street3,675 3,393 282 
Atlantic Wharf Office BuildingAtlantic Wharf Office Building4,071 3,578 493 
343 Madison Avenue (2)343 Madison Avenue (2)— — — 
$20,909 $18,801 $2,108 
300 Binney Street (3)
290 Binney Street (4)
$
_______________
(1)The increasedecrease was primarily attributable to an increasea decrease in lease revenue from our clients.
(2)343 Madison AvenueProperty is held for future development.
(3)Property is currently under redevelopment.
(4)Property is currently in development (See Notes 4 and Note 9 to the Consolidated Financial Statements).
Noncontrolling Interest—Common Units of the Operating Partnership
For BXP, noncontrolling interest—common units of the Operating Partnership decreasedincreased by approximately $53.5$0.4 million for the three months ended September 30, 2023March 31, 2024 compared to 20222023 due primarily to a decreasean increase in allocable income, which included recognizing a greater gain on sales of real estate during 2022.income. Due to our ownership structure, there is no corresponding line item on BPLP’s financial statements.
Liquidity and Capital Resources
General
Our principal liquidity needs for the next twelve months and beyond are to:
fund normal recurring expenses;
meet debt service and principal repayment obligations and balloon payments on maturing debt, including the $1.2 billion$700.0 million outstanding on the 2023 Unsecured Term Loan, maturingthe maturity date of which we intend to extend to May 16, 2024 (unless we exercise the one-year extension option, subject to certain conditions) and $7002025, $850.0 million of 3.800%3.200% unsecured senior notes due February 1, 2024;January 15, 2025 and amounts that become due under BPLP’s commercial paper program;
fund development and redevelopment costs;
fund capital expenditures, including major renovations, tenant improvements and leasing costs;
fund pending and possible acquisitions of properties, either directly or indirectly through the acquisition of equity interests; and
make the minimum distribution required to enable BXP to maintain its REIT qualification under the Internal Revenue Code of 1986, as amended.
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We expect to satisfy these needs using one or more of the following:
cash flow from operations;
distribution of cash flows from joint ventures;
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cash and cash equivalent balances;
borrowings under BPLP’s Revolving2021 Credit Facility, unsecured term loans, short-term bridge facilities and construction loans;
long-term secured and unsecured indebtedness (including unsecured exchangeable indebtedness);
sales of real estate and interests in joint ventures owning real estate;
private equity sources, including with large institutional investors; and
issuances of BXP equity securities and/or preferred or common units of partnership interests in BPLP.
We draw on multiple financing sources to fund our long-term capital needs. We expect to fund our current development/redevelopment properties primarily with our available cash balances, funding from institutional private equity partners, construction loans, unsecured term loans, and proceeds from possible asset sales, BPLP’s 2021 Credit Facility and BPLP’s Revolving Facility.BPLP's commercial paper program. We use BPLP’s Revolving2021 Credit Facility primarily as a bridge facility to fund acquisition opportunities, refinance outstanding indebtedness and meet short-term development and working capital needs. Although we may seek to fund our development projects with construction loans, which may require guarantees by BPLP, the financing for each particular project ultimately depends on several factors, including, among others, the project’s size and duration, whether the project is owned by a joint venture, the extent of pre-leasing, our available cash and access to cost effective capital at the given time.

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The following table presents information on properties under construction/redevelopment as of September 30, 2023March 31, 2024 (dollars in thousands):
Financings
Financings
Construction/Redevelopment Properties
Construction/Redevelopment Properties
Construction/Redevelopment PropertiesConstruction/Redevelopment PropertiesEstimated Stabilization DateLocation# of BuildingsEstimated Square FeetInvestment to Date (1)(2)(3)Estimated Total Investment (1)(2)Total Available (1)
Outstanding at September 30, 2023
(1)
Estimated Future Equity Requirement (1)(2)(4)Percentage Leased (5)
OfficeOffice
360 Park Avenue South (42% ownership)Q4 2025New York, NY1450,000 $207,253 $248,000 $92,774 $92,768 $40,741 18 %(6)
Office
Office
360 Park Avenue South (71% ownership) (Redevelopment)
360 Park Avenue South (71% ownership) (Redevelopment)
360 Park Avenue South (71% ownership) (Redevelopment)
Reston Next Office Phase IIReston Next Office Phase IIQ2 2025Reston, VA190,000 38,910 61,000 — — 22,090 — %
Reston Next Office Phase II
Reston Next Office Phase II
Total Office Properties under Construction/Redevelopment
Total Office Properties under Construction/Redevelopment
Total Office Properties under Construction/RedevelopmentTotal Office Properties under Construction/Redevelopment2540,000 246,163 309,000 92,774 92,768 62,831 15 %
Laboratory/Life SciencesLaboratory/Life Sciences
Laboratory/Life Sciences
Laboratory/Life Sciences
103 CityPoint
103 CityPoint
103 CityPoint103 CityPointQ3 2025Waltham, MA1113,000 84,873 115,100 — — 30,227 — %Q4 2025Waltham, MA1113,000 89,274 89,274 115,100 115,100 — — — — 25,826 25,826 — — %(6)
180 CityPoint180 CityPointQ3 2025Waltham, MA1329,000 207,941 290,500 — — 82,559 43 %(7)180 CityPointQ3 2025Waltham, MA1329,000 224,356 224,356 290,500 290,500 — — — — 66,144 66,144 43 43 %(7)
300 Binney Street (Redevelopment)Q1 2025Cambridge, MA1236,000 39,049 205,300 — — 166,251 100 %
105 Carnegie Center (Redevelopment)Q2 2025Princeton, NJ173,000 2,062 40,600 — — 38,538 — %
300 Binney Street (55% ownership) (Redevelopment)300 Binney Street (55% ownership) (Redevelopment)Q1 2025Cambridge, MA1236,000 5,211 112,900 — — 107,689 100 %(8)
651 Gateway (50% ownership) (Redevelopment)651 Gateway (50% ownership) (Redevelopment)Q4 2025South San Francisco, CA1327,000 94,241 167,100 — — 72,859 21 %651 Gateway (50% ownership) (Redevelopment)Q4 2025South San Francisco, CA1327,000 116,103 116,103 167,100 167,100 — — — — 50,997 50,997 21 21 %(9)
290 Binney StreetQ2 2026Cambridge, MA1566,000 210,885 1,116,300 — — 905,415 100 %
290 Binney Street (55% ownership)290 Binney Street (55% ownership)Q2 2026Cambridge, MA1566,000 205,977 508,000 — — 302,023 100 %(10)
Total Laboratory/Life Sciences Properties under Construction/RedevelopmentTotal Laboratory/Life Sciences Properties under Construction/Redevelopment61,644,000 639,051 1,934,900 — — 1,295,849 62 %
ResidentialResidential
Residential
Residential
Skymark - Reston Next Residential (508 units) (20% ownership)Skymark - Reston Next Residential (508 units) (20% ownership)Q2 2026Reston, VA1417,000 28,815 47,700 28,000 10,733 1,618 — %
Skymark - Reston Next Residential (508 units) (20% ownership)
Skymark - Reston Next Residential (508 units) (20% ownership)
121 Broadway Street (439 units)
121 Broadway Street (439 units)
121 Broadway Street (439 units)
Total Residential Property under Construction
Total Residential Property under Construction
Total Residential Property under ConstructionTotal Residential Property under Construction1417,000 28,815 47,700 28,000 10,733 1,618 — 
RetailRetail
Retail
Retail
760 Boylston Street (Redevelopment)
760 Boylston Street (Redevelopment)
760 Boylston Street (Redevelopment)760 Boylston Street (Redevelopment)Q2 2024Boston, MA1118,000 14,742 43,800 — — 29,058 100 %
Reston Next RetailReston Next RetailQ4 2025Reston, VA133,000 21,978 26,600 — — 4,622 — %
Reston Next Retail
Reston Next Retail
Total Retail Properties under Construction/Redevelopment
Total Retail Properties under Construction/Redevelopment
Total Retail Properties under Construction/RedevelopmentTotal Retail Properties under Construction/Redevelopment2151,000 36,720 70,400 — — 33,680 78 %
Total Properties under Construction/RedevelopmentTotal Properties under Construction/Redevelopment112,752,000 $950,749 $2,362,000 $120,774 $103,501 $1,393,978 52 %(8)
Total Properties under Construction/Redevelopment
Total Properties under Construction/Redevelopment113,171,000 $1,152,449 $2,388,800 $184,470 $174,623 $1,226,504 54 %(11)
___________  
(1)Represents our share.
(2)Each of Investment to Date, Estimated Total Investment and Estimated Future Equity Requirement represent our share of acquisition expenses, as applicable, and reflect our share of the estimated net revenue/expenses that we expect to incur prior to stabilization of the project, including any amounts actually received or paid through September 30, 2023.March 31, 2024.
(3)Includes approximately $157.6$73.6 million of unpaid but accrued construction costs and leasing commissions.
(4)Excludes approximately $157.6$73.6 million of unpaid but accrued construction costs and leasing commissions.
(5)Represents percentage leased as of October 30, 2023,May 2, 2024, including leases with future commencement dates.
(6)Investment to Date includes all related costs incurred prior to the contributionAs of theMarch 31, 2024, this property by us to the joint venture on December 15, 2021 totaling approximately $107 million and our proportionate share of the loan. Our joint venture partners will fund required capital until their aggregate investment is approximately 58% of all capital contributions; thereafter, the joint venture partners will fund required capital according to their percentage interests. Investment to date excludes approximately $54.0 million of an impairment charge.was 4% placed in-service.
(7)As of September 30, 2023,March 31, 2024, this property was 5%46% placed in-service.
(8)The institutional investor funded approximately $212.9 million at closing for its investment in 300 Binney Street. We withdrew approximately $212.9 million at closing and will fund all future costs of the project.
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(9)As of March 31, 2024, this property was 14% placed in-service.
(10)On March 21, 2024, we completed the sale of a 45% interest in 290 Binney Street (See Note 9 to the Consolidated Financial Statements). The project budget reflects our 55% share of joint venture costs related to 290 Binney Street.  We have the sole obligation to construct an underground electrical vault for an estimated gross cost of $183.9 million. We have entered into a contract to sell the electrical vault to a third party for a fixed price of $84.1 million upon completion.  The net investment of $99.8 million will be included in our outside basis in 290 Binney Street. We have invested $40.5 million for the vault as of March 31, 2024.
(11)Percentage leased excludes the residential property.properties.
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Lease revenue (which includes reimbursement of operating expenses from clients, if any), other income from operations, available cash balances, proceeds from mortgage financings, and offerings of unsecured indebtedness and BPLP's commercial paper program, draws on BPLP’s Revolving2021 Credit Facility, and funding from institutional private equity partners are the principal sources of capital that we use to fund operating expenses, debt service, development and redevelopment activities, maintenance and repositioning capital expenditures, tenant improvements and the minimum distribution required to enable BXP to maintain its REIT qualification. We seek to maximize income from our existing properties by maintaining quality standards for our properties that promote high occupancy rates and permit increases in rental rates while reducing client turnover and controlling operating expenses. Our sources of revenue also include third-party fees generated by our property management, leasing, development and construction businesses, as well asinterest earned on cash deposits and, from time to time, the sale of assets from time to time.assets. We believe these sources of capital will continue to provide the funds necessary for our short-term liquidity needs. Material adverse changes in one or more sources of capital may adversely affect our net cash flows.
We expect our primary uses of capital over the next twelve months will be to fund our current and committed development and redevelopment projects, repay debt maturities (as discussed below), make interest payments on our outstanding indebtedness, and satisfy our REIT distribution requirements.
As of September 30, 2023,March 31, 2024, we had 11 properties under development or redevelopment. Our share of the estimated total investment for these projects is approximately $2.4$2.6 billion, of which approximately $1.4 billion remains to be funded primarily with equity through 2026. In the third quarter of 2023,2027. On April 5, 2024, we completed the development/redevelopment of:
140 Kendrickand fully placed into service 760 Boylston Street, - Building A, a premier workplace redevelopment project with approximately 104,000 net rentable square feet located in Needham, Massachusetts. The property is the first Net Zero, Carbon Neutral office repositioning of its scale in Massachusetts. The property is 100% leased.
751 Gateway, an approximately 231,000118,000 net rentable square foot laboratory/life sciences propertyretail redevelopment located in South San Francisco, California. The property is 100% leased.Boston, Massachusetts.
On July 28, 2023, we entered into a joint venture agreement with an institutional investor forDuring the future developmentfirst quarter of 343 Madison Avenue located on Madison Avenue between 44th and 45th Streets in New York City, New York adjacent to Grand Central Station. We own a 55% interest in the venture and our partner owns a 45% interest, and we will provide customary development, property management, and leasing services. The 343 Madison Avenue project contemplates the construction of Phase 1 and Phase 2 (See Note 4 to the Consolidated Financial Statements). Subsequently, on August 1, 2023, the joint venture executed an up to 99-year ground lease with the Metropolitan Transportation Authority for the approximately 25,000 square foot site. The joint venture has the option until July 31, 2025 to terminate the ground lease prior to construction of the new building and receive reimbursement of up to $117.0 million for the cost of the construction of Phase 1. There can be no assurance that Phase 1 will be completed on the terms currently contemplated or that Phase 2 of the development project will commence on the terms and schedule currently contemplated or at all.
Since June 30, 2023,2024, we further strengthened our balance sheet by addressing the remaining 2023 debt maturities, andthrough sourcing additional liquidity in the bank market.and reducing our debt obligations. Notable transactions include:
We exercisedOn February 1, 2024, BPLP repaid at maturity its 3.800% unsecured senior notes at par utilizing the proceeds from a portion$600.0 million mortgage loan entered into on October 26, 2023 and available cash. The repayment price was approximately $713.3 million, which included the stated principal of $700 million plus approximately $13.3 million of accrued and unpaid interest.
On April 16, 2024, BPLP provided notice to exercise its one-year extension option on its 2023 Unsecured Term Loan. BPLP anticipates effectuating the extension on or prior to the current May 16, 2024 maturity date. Upon effectiveness, the 2023 Unsecured Term Loan will mature on May 16, 2025. After making an approximately $500.0 million optional repayment on April 29, 2024 with the proceeds from BPLP's commercial paper program, the 2023 Unsecured Term Loan has an outstanding principal balance of $700.0 million.
On April 17, 2024, BPLP established an unsecured commercial paper program. Under the terms of the Accordionprogram, BPLP may issue, from time to time, unsecured commercial paper notes up to a maximum aggregate amount outstanding at any one time of $500.0 million with three new lendersvarying maturities of up to one year. The notes will be sold in private placements and will rank pari passu with all of BPLP’s other unsecured senior indebtedness, including its outstanding senior notes. The commercial paper program is backstopped by available capacity under the 2021 Credit Facility and entered intoFacility. As of May 2, 2024, BPLP had $500.0 million outstanding under the commercial paper program that bears interest at a lender agreement with eachweighted-average rate of the New Lenders to provide an aggregate of $315.0 million in additional revolving credit commitments, which5.58% per annum.
On April 29, 2024, BPLP increased the current maximum borrowing amount under the 2021 Credit Facility from $1.5$1.815 billion to $1.815$2.0 billion.
A joint venture in which we have a 50% interest exercised an option to extend by one year All other terms of the 2021 Credit Facility, including its maturity date of its loan collateralized by 100 Causeway in Boston, Massachusetts. The approximately 635,000 square foot premier workplace located in Boston, Massachusetts is approximately 95% leasedJune 15, 2026, remain unchanged. BPLP had no borrowings under the 2021 Credit Facility as of September 30, 2023. After making an approximately $4.0 million principal repayment, the modified and extended loan had an outstanding balance of $336.6 million and the interest rate was reduced from Term SOFR plus 1.60% to Term SOFR plus 1.48% per annum. The loan now matures on September 5, 2024, with a one-year extension option, subject to certain conditions.
A joint venture in which we have a 50% interest modified the loan collateralized by its Hub on Causeway - Podium property located in Boston, Massachusetts. The modified loan now matures on September 8, 2025, with a one-year extension option, subject to certain conditions. After making an approximately $20.0 million repayment, the modified loan had an outstanding balance of $154.3 million. The interest rate changed from Term SOFR plus 2.35% per annum to Daily SOFR plus 2.50% per annum. The joint venture entered into
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interest rate swap contracts resulting in a weighted-average fixed rate of approximately 7.35% per annum through September 8, 2025.
A joint venture in which we have a 25% interest exercised its second extension option with the lender, an affiliate of ours, under the land loan collateralized by the land and improvements at its 3 Hudson Boulevard property located in New York, New York. The land loan now matures on February 9, 2024.
We completed the repayment of $500.0 million in aggregate principal amount of 3.125% senior notes due September 1, 2023. The repayment price was approximately $507.8 million, which included the entire principal amount plus approximately $7.8 million of accrued and unpaid interest.
On October 26, 2023, we closed on a mortgage loan collateralized by our 325 Main Street, 355 Main Street, 90 Broadway and Cambridge East Garage (also known as Kendall Center Green Garage) properties located in Cambridge, Massachusetts. The mortgage loan, totaling $600 million, requires interest-only payments at Daily Compounded SOFR plus 2.25% per annum until maturity on October 26, 2028. We intend to use the net proceeds from this financing and available cash to repay the $700 million of 3.800% unsecured senior notes due February 1,May 2, 2024.
Our 2024consolidated debt maturities through May 2025 include $700.0(1) $850.0 million aggregate principal amount of BPLP’s 3.800%3.200% unsecured senior notes which mature on February 1, 2024 and the $1.2 billiondue January 15, 2025, (2) $700.0 million 2023 Unsecured Term Loan that matures on May 16, 20242025 upon effectiveness of our extension option, (3) approximately $202.2 million of mortgage debt secured by our 901 New York Avenue property located in Washington, DC maturing on January 5, 2025 (unless we exercise the one-yeara four-year extension option, subject to certain conditions). In and (4) amounts that become due under BPLP’s commercial paper program.
As of March 31, 2024, our unconsolidated joint venture portfolio we have approximately $405.4$469.0 million (our share) of debt maturing in 2024.through May 2, 2025. We expect to fund the foregoing debt maturities using available cash
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balances, proceeds from asset sales, draws on BPLP’s Revolving2021 Credit Facility, exercising extension options, and/or through refinancings usingproceeds from BPLP’s commercial paper program, secured debt or unsecured debt, or both. We expect our quarterly net interest expense will increase for the remainder of 2023 and intoin 2024 compared to the first nine months of 2023 primarily due to the cessation of capitalized interest on our 2023 development deliveries, higher interest rates on maturingoutstanding debt and debt that we refinance, the impact of non-cash interest charges related to recent acquisitions, which included the assumption of below market debt, and lower interest income as we use cash balances to repay debt and fund our development pipeline.
As of October 30, 2023,May 2, 2024, we had available cash of approximately $1.4 billion$502.5 million (of which approximately $93$125.9 million is attributable to our consolidated joint venture partners). Our liquidity and capital resources depend on a wide range of factors, and we believe that our access to capital and our strong liquidity, including the approximately $1.8$2.0 billion available under BPLP’s Revolving2021 Credit Facility, of which $500.0 million is being used as a backstop for the commercial paper program, and our available cash, as of October 30, 2023,May 2, 2024, are sufficient to fund our remaining capital requirementsneeds on existing development and redevelopment projects, fund acquisitions, repay our maturing indebtedness when due (if not refinanced or extended), satisfy our REIT distribution requirements and still allow us to act opportunistically on attractive investment opportunities.
We may seek to enhance our liquidity to fund our current and future development activity, pursue additional attractive investment opportunities and refinance or repay indebtedness. Depending on interest rates, the overall conditions in the public and private debt and equity markets, and our leverage at the time, we may decide to access one or more of these capital sources. Doing so may result in us carrying additional cash and cash equivalents pending our use of the proceeds, which would increase our net interest expense.
On May 17, 2023, BXP renewed its ATM stock offering program through which it may sell from time to time up to an aggregate of $600.0 million of its Common Stock through sales agents over a three-year period. Under the ATM stock offering program, BXP may also engage in forward sale transactions with affiliates of certain sales agents for the sale of its Common Stock on a forward basis. BXP intends to use the net proceeds from any offering for general business purposes, which may include investment opportunities and debt reduction. We have not sold any shares under this ATM stockBXP’s $600.0 million “at the market” equity offering program.
REIT Tax Distribution Considerations
Dividend
BXP as a REIT is subject to a number of organizational and operational requirements, including a requirement that BXP currently distribute at least 90% of its annual taxable income (excluding capital gains and with certain other adjustments). Our policy is for BXP to distribute at least 100% of its taxable income, including capital gains, to avoid paying federal tax. Common and LTIP unitholders (other than unearned MYLTIP units) of limited partnership interest in BPLP receive the same distribution per unit that is paid per share of BXP common stock.
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BXP’s Board of Directors will continue to evaluate BXP’s dividend rate in light of our actual and projected taxable income (including gains on sales), liquidity requirements and other circumstances, and there can be no assurance that the future dividends declared by BXP’s Board of Directors will not differ materially from the current quarterly dividend amount.
Sales
To the extent that we sell assets at a gain and cannot efficiently use the proceeds in a tax deferred manner for either our development activities or attractive acquisitions, BXP would, at the appropriate time, decide whether it is better to declare a special dividend, adopt a stock repurchase program, reduce indebtedness or retain the cash for future investment opportunities. Such a decision will depend on many factors including, among others, the timing, availability and terms of development and acquisition opportunities, our then-current and anticipated leverage, the cost and availability of capital from other sources, the price of BXP’s common stock and REIT distribution requirements. At a minimum, we expect that BXP would distribute at least that amount of proceeds necessary for BXP to avoid paying corporate level tax on the applicable gains realized from any asset sales.
From time to time in select cases, whether due to a change in use, structuring issues to comply with applicable REIT regulations or other reasons, we may sell an asset that is held by a taxable REIT subsidiary (“TRS”). Such a sale by a TRS would be subject to federal and local taxes.
Cash Flow Summary
The following summary discussion of our cash flows is based on the Consolidated Statements of Cash Flows and is not meant to be an all-inclusive discussion of the changes in our cash flows for the periods presented below.
Cash and cash equivalents and cash held in escrows aggregated approximately $930.4$766.6 million and $448.9$964.3 million at September 30,March 31, 2024 and 2023, and 2022, respectively, representing an increasea decrease of approximately $481.6$197.6 million. The following table sets forth changes in cash flows:
 Nine months ended September 30,
20232022Change
(in thousands)
Net cash provided by operating activities$914,372 $912,403 $1,969 
Net cash used in investing activities(875,578)(1,313,220)437,642 
Net cash provided by financing activities154,782 348,545 (193,763)
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 Three months ended March 31,
20242023Change
(in thousands)
Net cash provided by operating activities$197,595 $234,010 $(36,415)
Net cash used in investing activities(286,619)(285,592)(1,027)
Net cash (used in) provided by financing activities(756,909)279,052 (1,035,961)
Our principal source of cash flow is related to the operation of our properties. The weighted-average term of our in-place leases, including leases signed by our unconsolidated joint ventures, excluding residential units, was approximately 7.6 years as of September 30, 2023,March 31, 2024, with occupancy rates historically in the range of 88% to 92%. Generally, our properties generate a relatively consistent stream of cash flow that provides us with resources to pay operating expenses, debt service and fund regular quarterly dividend and distribution payment requirements. In addition, over the past several years, we have raised capital through the sale of some of our properties and through secured and unsecured borrowings.
Cash is used in investing activities to fund acquisitions, development, net investments in unconsolidated joint ventures and maintenance and repositioning capital expenditures. We selectively invest in new projects that enable us to take advantage of our development, leasing, financing and property management skills and invest in existing buildings to enhance or maintain our market position. Cash used in investing activities for the ninethree months ended September 30,March 31, 2024 and March 31, 2023 and September 30, 2022 is detailed below:
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 Nine months ended September 30,
 20232022
 (in thousands)
Acquisitions of real estate (1)$— $(1,320,273)
Construction in progress (2)(361,625)(384,083)
Building and other capital improvements(117,393)(112,755)
Tenant improvements(244,841)(139,986)
Proceeds from sales of real estate (3)517 695,231 
Proceeds from assignment fee (4)— 6,624 
Capital contributions to unconsolidated joint ventures (5)(148,875)(109,643)
Capital distributions from unconsolidated joint ventures (6)7,350 36,622 
Investment in non-real estate investments(1,990)— 
Issuance of related party note receivable (7)(10,500)— 
Proceeds from note receivable (8)— 10,000 
Investments in securities, net1,779 5,043 
Net cash used in investing activities$(875,578)$(1,313,220)
 Three months ended March 31,
 20242023
 (in thousands)
Construction in progress (1)$(181,636)$(119,682)
Building and other capital improvements(32,087)(39,100)
Tenant improvements(53,377)(67,175)
Acquisition of real estate (net of cash received upon consolidation) (2)6,086 — 
Capital contributions to unconsolidated joint ventures (3)(26,457)(60,745)
Investment in non-real estate investments— (733)
Issuance of note receivables (including related party)(573)— 
Investments in securities, net1,425 1,843 
Net cash used in investing activities$(286,619)$(285,592)
Cash used in investing activities changed primarily due to the following:
(1)On September 16, 2022, we acquired 125 Broadway in Cambridge, Massachusetts for a net purchase price, including transaction costs, of approximately $592.4 million. The acquisition was completed with available cash and borrowings under BPLP’s Revolving Facility. 125 Broadway is a 271,000 net rentable square foot, six-story, laboratory/life sciences property.
On May 17, 2022, we completed the acquisition of Madison Centre in Seattle, Washington, for an aggregate purchase price, including transaction costs, of approximately $724.3 million. Madison Centre is an approximately 755,000 net rentable square foot, 37-story, LEED-Platinum certified, premier workplace.
(2)Construction in progress for the ninethree months ended September 30, 2023March 31, 2024 included ongoing expenditures associated with 2100 Pennsylvania Avenue, 140 Kendrick Street Building A and the View Boston observatory at The Prudential Center, which were fully placed in-service during the nine months ended September 30, 2023 and 180 CityPoint and 103 CityPoint that waswere partially placed in-service during the nine months ended September 30, 2023. In addition, we incurred costs associated with our continued development/redevelopment of 103 CityPoint, Reston Next Office Phase II, 760 Boylston Street, 105 Carnegie Center, 290 Binney Street, and 300 Binney Street.Street and 121 Broadway.
Construction in progress for the ninethree months ended September 30, 2022March 31, 2023 included ongoing expenditures associated with Reston Next, 2100 Pennsylvania Avenue, and 880 Winter Street, each of which were partially placed in-service, and 325 Main Street, which was completed and fullypartially placed in-service during the ninethree months ended September 30, 2022.March 31, 2023. In addition, we incurred costs associated with our continued development/redevelopment of 180 CityPoint, View Boston observatory at The Prudential Center, 103 CityPoint, Reston Next Office Phase II, 140 Kendrick Street Building A, and 760 Boylston Street, 105 Carnegie Center, 290 Binney Street and 300 Binney Street.
(3)(2)On September 15, 2022,January 8, 2024, we completed the saleacquisition of two parcels of land locatedour joint venture partner’s 50% economic ownership interest in Loudoun County, Virginia for a gross sale price of $27.0 million. Net cash proceeds totaled approximately $25.6 million, resulting in a gain on sale of real estate totaling approximately $24.4 million for BXP and BPLP.
On August 30, 2022, we completed the sale of 601 Massachusettsjoint venture that owns 901 New York Avenue, located in Washington, DC, for a gross sale price of $531.0 million. Net cash proceeds totaled approximately $512.3 million, resulting in a gain on sale of real estate totaling approximately $237.4 million for BXP and approximately $237.5 million for BPLP. 601 Massachusetts Avenue is an approximately 479,000 net rentable square foot premier workplace.
On June 15, 2022, we completed the sale of our Virginia 95 Office Park properties located in Springfield, Virginia for an aggregate gross sale price of $127.5 million. Net cash proceeds totaled approximately $121.9 million, resulting in a gain on sale of real estate totaling approximately $96.2 million for BXP and
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approximately $99.5 million for BPLP. Virginia 95 Office Park consists of eleven Class A office/flex properties aggregating approximately 733,000 net rentable square feet.
On March 31, 2022, we completed the sale of 195 West Street located in Waltham, Massachusetts for a gross sale price of $37.7 million. Net cash proceeds totaled approximately $35.4 million, resulting in a gain on sale of real estate totaling approximately $22.7 million for BXP and approximately $23.4 million for BPLP. 195 West Street is an approximately 63,500 net rentable square foot premier workplace.
(4)On April 19, 2021, we entered into an agreement to acquire 11251 Roger Bacon Drive in Reston, Virginia for an aggregate purchase price of approximately $5.6 million. On April 7, 2022,$10.0 million and we executed an agreement to assign the right to acquire 11251 Roger Bacon Drive to a third party for an assignment feeacquired net working capital, including cash and cash equivalents of approximately $6.9$16.1 million. Net cash proceeds totaled approximately $6.6 million. 11251 Roger Bacon Drive is an approximately 65,000 square foot office building situated on approximately 2.6 acres. The property was 100% leased.
(5)(3)Capital contributions to unconsolidated joint ventures for the ninethree months ended September 30,March 31, 2024 consisted primarily of cash contributions of approximately $9.9 million, $6.7 million and $5.7 million to our Gateway Commons, 360 Park Avenue South and Platform 16 joint ventures, respectively.
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Capital contributions to unconsolidated joint ventures for the three months ended March 31, 2023 consisted primarily of cash contributions of approximately $46.8$17.3 million, $32.8$15.6 million, $17.5$11.6 million, $14.4$6.5 million and $9.5$4.0 million to our Worldgate Drive, Gateway Commons, Platform 16, Worldgate Drive, Dock 72 and 751 Gateway joint ventures, respectively. On January 31, 2023, we entered into a new joint venture for 13100 and 13150 Worldgate Drive located in Herndon, Virginia.
Capital contributions to unconsolidated joint ventures for the nine months ended September 30, 2022 consisted primarily of cash contributions of approximately $44.8 million, $31.6 million and $16.4 million to our Gateway Commons, Platform 16 and 751 Gateway joint ventures, respectively.
(6)Capital distributions from unconsolidated joint ventures for the nine months ended September 30, 2023 consisted primarily of a cash distribution totaling approximately $7.4 million from our 360 Park Avenue South joint venture.
Capital distributions from unconsolidated joint ventures for the nine months ended September 30, 2022 consisted primarily of cash distributions totaling approximately $21.6 million and $11.6 million from our Metropolitan Square and 7750 Wisconsin Avenue joint ventures, respectively.
(7)On June 5, 2023, a joint venture in which we own a 30% interest repaid the existing construction loan collateralized by its 500 North Capitol Street, NW property and obtained new mortgage loans with related parties. At the time of the pay off, the outstanding balance of the loan totaled approximately $105.0 million and was scheduled to mature on June 6, 2023. The new mortgage loans have an aggregate principal balance of $105.0 million, bear interest at a weighted average fixed rate of 6.83% per annum and mature on June 5, 2026. Our portion of the mortgage loans, $10.5 million, has been reflected as a Related Party Note Receivable on our Consolidated Balance Sheets. 500 North Capitol Street, NW is a 231,000 square foot premier workplace in Washington, DC.
(8)An affiliate of The Bernstein Companies exercised its option to borrow $10.0 million from us, and we provided the financing on June 1, 2020. The financing bore interest at a fixed rate of 8.00% per annum, compounded monthly, and was scheduled to mature on the fifth anniversary of the date on which the base building of the affiliate of The Bernstein Companies’ hotel property was substantially completed. On June 27, 2022, the borrower repaid the loan in full, including approximately $1.6 million of accrued interest.
Cash providedused by financing activities for the ninethree months ended September 30, 2023March 31, 2024 totaled approximately $154.8$756.9 million. This amount consisted primarily of borrowings under the 2023 Unsecured Term Loan and the proceeds from the issuance by BPLPrepayment of $750BPLP’s $700 million in aggregate principal amount of its 6.500%3.800% unsecured senior notes due 2034, partially offset by the repayment of BPLP’s $730 million unsecured credit agreement (the “2022 Unsecured Term Loan”), repayment of BPLP’s $500 million in aggregate principal amount of its 3.125% unsecured senior notes due SeptemberFebruary 1, 20232024 and payment of our regular dividends and distributions to our shareholders and unitholders and distributions to noncontrolling interests in property partnerships.partnerships, partially offset by the approximately $97.2 million from the sale of a 45% interest in 290 Binney Street in Cambridge, Massachusetts. Future debt payments are discussed below under the heading “Debt Financing.”
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Capitalization
The following table presents Consolidated Market Capitalization and BXP’s Share of Market Capitalization, as well as the corresponding ratios of Consolidated Debt to Consolidated Market Capitalization and BXP’s Share of Debt to BXP’s Share of Market Capitalization (in thousands, except for percentages):
September 30, 2023
Shares / Units OutstandingCommon Stock EquivalentEquivalent Value (1)
March 31, 2024
Shares / Units Outstanding
Shares / Units Outstanding
Shares / Units Outstanding
Common StockCommon Stock156,939 156,939 $9,334,732 
Common Stock
Common Stock
Common Operating Partnership Units
Common Operating Partnership Units
Common Operating Partnership UnitsCommon Operating Partnership Units18,582 18,582 1,105,257 (2)19,159 19,159 19,159 1,251,274 1,251,274 (2)(2)
Total EquityTotal Equity175,521 $10,439,989 
Consolidated DebtConsolidated Debt$14,961,715 
Consolidated Debt
Consolidated Debt
Add:
Add:
Add:Add:
BXP’s share of unconsolidated joint venture debt (3)BXP’s share of unconsolidated joint venture debt (3)1,518,195 
BXP’s share of unconsolidated joint venture debt (3)
BXP’s share of unconsolidated joint venture debt (3)
Subtract:
Subtract:
Subtract:Subtract:
Partners’ share of Consolidated Debt (4)Partners’ share of Consolidated Debt (4)(1,359,877)
Partners’ share of Consolidated Debt (4)
Partners’ share of Consolidated Debt (4)
BXP’s Share of Debt
BXP’s Share of Debt
BXP’s Share of DebtBXP’s Share of Debt$15,120,033 
Consolidated Market CapitalizationConsolidated Market Capitalization$25,401,704 
Consolidated Market Capitalization
Consolidated Market Capitalization
BXP’s Share of Market Capitalization
BXP’s Share of Market Capitalization
BXP’s Share of Market CapitalizationBXP’s Share of Market Capitalization$25,560,022 
Consolidated Debt/Consolidated Market CapitalizationConsolidated Debt/Consolidated Market Capitalization58.90 %
Consolidated Debt/Consolidated Market Capitalization
Consolidated Debt/Consolidated Market Capitalization
BXP’s Share of Debt/BXP’s Share of Market CapitalizationBXP’s Share of Debt/BXP’s Share of Market Capitalization59.16 %
BXP’s Share of Debt/BXP’s Share of Market Capitalization
BXP’s Share of Debt/BXP’s Share of Market Capitalization
_______________  
(1)Values are based on the closing price per share of BXP’s Common Stockcommon stock on the New York Stock Exchange on September 29, 2023March 28, 2024 of $59.48.$65.31.
(2)Includes long-term incentive plan units (including 2012 OPP Units and 2013 - 20202021 MYLTIP Units) but excludes the 20212022 - 20232024 MYLTIP Units because the three-year performance periods had not ended as of September 30, 2023.March 31, 2024.
(3)See page 9473 for additional information.
(4)See page 9371 for additional information.

Consolidated Debt to Consolidated Market Capitalization Ratio is a measure of leverage commonly used by analysts in the REIT sector. We present this measure as a percentage and it is calculated by dividing (A) our consolidated debt by (B) our consolidated market capitalization, which is the market value of our outstanding equity securities plus our consolidated debt. Consolidated market capitalization is the sum of:
(1)     our consolidated debt; plus
(2)     the product of (x) the closing price per share of BXP Common Stockcommon stock on September 29, 2023,March 28, 2024, as reported by the New York Stock Exchange, multiplied by (y) the sum of:
(i)     the number of outstanding shares of Common Stockcommon stock of BXP,
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(ii)     the number of outstanding OP Units in BPLP (excluding OP Units held by BXP),
(iii)     the number of OP Units issuable upon conversion of all outstanding LTIP Units, assuming all conditions have been met for the conversion of the LTIP Units, and
(iv)     the number of OP Units issuable upon conversion of 2012 OPP Units, and 2013 - 20202021 MYLTIP Units that were issued in the form of LTIP Units.
The calculation of consolidated market capitalization does not include LTIP Units issued in the form of MYLTIP Awards unless and until certain performance thresholds are achieved and they are earned. Because their three-year performance periods have not yet ended, 20212022 - 20232024 MYLTIP Units are not included in this calculation as of September 30, 2023.
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March 31, 2024.
We also present BXP’s Share of Market Capitalization and BXP’s Share of Debt/BXP’s Share of Market Capitalization, which are calculated in the same manner, except that BXP’s Share of Debt is utilized instead of our consolidated debt in both the numerator and the denominator. BXP’s Share of Debt is defined as our consolidated debt plus our share of debt from our unconsolidated joint ventures (calculated based upon our ownership percentage), minus our partners’ share of debt from our consolidated joint ventures (calculated based upon the partners’ percentage ownership interests adjusted for basis differentials). Management believes that BXP’s Share of Debt provides useful information to investors regarding our financial condition because it includes our share of debt from unconsolidated joint ventures and excludes our partners’ share of debt from consolidated joint ventures, in each case presented on the same basis. We have several significant joint ventures and presenting various measures of financial condition in this manner can help investors better understand our financial condition and/or results of operations after taking into account our economic interest in these joint ventures.  We caution investors that the ownership percentages used in calculating BXP’s Share of Debt may not completely and accurately depict all of the legal and economic implications of holding an interest in a consolidated or unconsolidated joint venture. For example, in addition to partners’ interests in profits and capital, venture agreements vary in the allocation of rights regarding decision making (both for routine and major decisions), distributions, transferability of interests, financing and guarantees, liquidations and other matters.  Moreover, in some cases we exercise significant influence over, but do not control, the joint venture in which case GAAP requires that we account for the joint venture entity using the equity method of accounting and we do not consolidate it for financial reporting purposes. In other cases, GAAP requires that we consolidate the venture even though our partner(s) own(s) a significant percentage interest.  As a result, management believes that the presentation of BXP’s Share of a financial measure should not be considered a substitute for, and should only be considered with and as a supplement to our financial information presented in accordance with GAAP.
We present these supplemental ratios because our degree of leverage could affect our ability to obtain additional financing for working capital, capital expenditures, acquisitions, development or other general corporate purposes and because different investors and lenders consider one or both of these ratios. Investors should understand that these ratios are, in part, a function of the market price of the common stock of BXP and as such will fluctuate with changes in such price, and they do not necessarily reflect our capacity to incur additional debt to finance our activities or our ability to manage our existing debt obligations. However, for a company like BXP, whose assets are primarily income-producing real estate, these ratios may provide investors with an alternate indication of leverage, so long as they are evaluated along with the ratio of indebtedness to other measures of asset value used by financial analysts and other financial ratios, as well as the various components of our outstanding indebtedness.
For a discussion of our unconsolidated joint venture indebtedness, see “Liquidity and Capital Resources—Investment in Unconsolidated Joint Ventures - Secured Debt” within “Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations” and for a discussion of our consolidated joint venture indebtedness see “Liquidity and Capital Resources—Mortgage Notes Payable” within “Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations.”
Debt Financing
As of September 30, 2023,March 31, 2024, we had approximately $15.0$15.4 billion of outstanding consolidated indebtedness, representing approximately 58.90%57.17% of our Consolidated Market Capitalization as calculated above consisting of approximately (1) $10.5$9.8 billion (net of discount and deferred financing fees) in publicly traded unsecured senior notes having a GAAP weighted-average interest rate of 3.91% per annum and maturities in 20242025 through 2034, (2) $3.3$4.4 billion (net of deferred financing fees)fees and fair value interest adjustments) of property-specific mortgage debt having
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a GAAP weighted-average interest rate of 3.42%4.22% per annum and a weighted-average term of 5.14.2 years and (3) $1.2 billion outstanding under BPLP’s 2023 Unsecured Term Loan that matures on May 16, 2024.2024 (See Note 14 to the Consolidated Financial Statements).
The table below summarizes the aggregate carrying value of our mortgage notes payable and BPLP’s unsecured senior notes, unsecured line of credit, and unsecured term loan,outstanding indebtedness, as well as Consolidated Debt Financing Statistics at September 30,March 31, 2024 and March 31, 2023.  
March 31,
20242023
 (dollars in thousands)
Debt Summary:
Balance
Mortgage notes payable, net$4,368,367 $3,273,553 
Unsecured senior notes, net9,794,527 10,240,967 
Unsecured line of credit— — 
Unsecured term loan, net1,199,430 1,194,916 
Consolidated Debt15,362,324 14,709,436 
Add:
BXP’s share of unconsolidated joint venture debt, net (1)1,373,986 1,604,852 
Subtract:
Partners’ share of consolidated mortgage notes payable, net (2)1,360,873 1,358,881 
BXP’s Share of Debt$15,375,437 $14,955,407 
March 31,
20242023
Consolidated Debt Financing Statistics:
Percent of total debt:
Fixed rate (3)100.00 %91.88 %
Variable rate— %8.12 %
Total100.00 %100.00 %
GAAP Weighted-average interest rate at end of period:
Fixed rate (3)4.17 %3.62 %
Variable rate— %5.87 %
Total4.17 %3.81 %
Coupon/Stated Weighted-average interest rate at end of period:
Fixed rate (3)3.93 %3.51 %
Variable rate— %5.49 %
Total3.93 %3.67 %
Weighted-average maturity at end of period (in years):
Fixed rate (3)4.6 5.4 
Variable rate— 1.1 
Total4.6 5.0 
_______________
(1)See page 73 for additional information.
(2)See page 71 for additional information.
(3)At March 31, 2024, the $1.2 billion 2023 Unsecured Term Loan and September 30, 2022.  two of our mortgage loans aggregating approximately $900.0 million bore interest at variable rates. We entered into interest rate swap contracts that effectively fixed the variability of these loans for all or a portion of the applicable debt term and as such, they are reflected in our Fixed rate statistics.
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September 30,
20232022
 (dollars in thousands)
Debt Summary:
Balance
Fixed rate mortgage notes payable, net$3,275,974 $3,271,157 
Unsecured senior notes, net10,488,568 9,491,714 
Unsecured line of credit— 340,000 
Unsecured term loan, net1,197,173 730,000 
Consolidated Debt14,961,715 13,832,871 
Add:
BXP’s share of unconsolidated joint venture debt, net (1)1,518,195 1,450,624 
Subtract:
Partners’ share of consolidated mortgage notes payable, net (2)(1,359,877)(1,357,896)
BXP’s Share of Debt$15,120,033 $13,925,599 
September 30,
20232022
Consolidated Debt Financing Statistics:
Percent of total debt:
Fixed rate (3)100.00 %92.26 %
Variable rate— %7.74 %
Total100.00 %100.00 %
GAAP Weighted-average interest rate at end of period:
Fixed rate (3)3.97 %3.43 %
Variable rate— %3.43 %
Total3.97 %3.43 %
Coupon/Stated Weighted-average interest rate at end of period:
Fixed rate (3)3.84 %3.32 %
Variable rate— %3.40 %
Total3.84 %3.33 %
Weighted-average maturity at end of period (in years):
Fixed rate (3)4.9 5.9 
Variable rate— 1.6 
Total4.9 5.6 
_______________
(1)See page 94 for additional information.
(2)See page 93 for additional information.
(3)The 2023 Unsecured Term Loan bears interest at a variable rate of adjusted Term SOFR plus a margin ranging from 75 to 160 basis points based on BPLP’s credit rating. On May 2, 2023, BPLP executed interest rate swaps that effectively fixed Term SOFR for the $1.2 billion outstanding under the 2023 Unsecured Term Loan (see Notes 6 and 7 to the Consolidated Financial Statements). As such, the 2023 Unsecured Term Loan is reflected within Fixed rate statistics.
Unsecured Credit Facility
The 2021 Credit Facility provides for borrowings of up to $1.815$2.0 billion, as described below, through the Revolving Facility, subject to customary conditions. The 2021 Credit Facility matures on June 15, 2026 and includes a sustainability-linked pricing component. Under the 2021 Credit Facility, BPLP may increase the total commitment by up to $500.0 million by utilizingincreasing the Accordion.amount of the revolving facility and/or by incurring one or more term loans, in each case, subject to syndication of the increase and other conditions (the “Accordion”). On September 28, 2023, BPLP exercised a portion of the Accordion with three New Lenders to the 2021 Credit Facility. Each of the New Lenders entered into a lender agreement with BPLP to provide an aggregate of $315.0 million in additional revolving credit commitments, which
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increased the maximum borrowing amount under the 2021 Credit Facility from $1.5 billion to $1.815 billion. On April 29, 2024, BPLP exercised the remainder of the Accordian and increased the maximum borrowing amount under the 2021 Credit Facility from $1.815 billion to $2.0 billion. All other terms of the 2021 Credit Facility remain unchanged.
On June 1, 2023, BPLP amended itsAt BPLP’s option, loans under the 2021 Credit Facility will bear interest at a rate per annum equal to replace (1) (a) in
the LIBOR-based daily floatingcase of loans denominated in Dollars, Term SOFR and SOFR, (b) in the case of loans denominated in Euro,
EURIBOR, (c) in the case of loans denominated in Canadian Dollars, CDOR, and (d) in the case of loans
denominated in Sterling, SONIA, in each case, plus a margin ranging from 70.0 to 140.0 basis points based on
BPLP’s credit rating or (2) an alternate base rate option withequal to the greatest of (a) the Federal Funds rate plus 0.5%, (b)
the administrative agent’s prime rate, (c) Term SOFR plus 1.00%, and (d) 1.00%, in each case, plus a SOFR-based daily floating rate option andmargin
ranging from 0 to add options for SOFR-based term floating rates and rates for alternative currency loans.40 basis points based on BPLP’s credit rating. In addition, the amendment addedthere is a SOFR credit spread adjustment of 0.10%. Other than the foregoing, the material terms of the 2021 Credit Facility remain unchanged.
Based on BPLP’s September 30, 2023March 31, 2024 credit rating, (1) the applicable Daily SOFR, Term SOFR, alternative currency daily rate, and alternative currency term rate margins are 0.775%0.850%, (2) the alternate base rate margin is zero basis points and (3) the facility fee is 0.15%0.20% per annum.
At September 30, 2023 and October 30, 2023,March 31, 2024, BPLP had no borrowings under its Revolving2021 Credit Facility and outstanding letters of credit totaling approximately $6.7 million, with the ability to borrow approximately $1.8 billion. At May 2, 2024, BPLP had no borrowings under its 2021 Credit Facility and outstanding letters of credit totaling approximately $6.6 million, with the ability to borrow approximately $2.0 billion, of which $500.0 million is being used as a backstop for the commercial paper program.
Unsecured Term Loan
On January 4, 2023, BPLP entered into theThe 2023 Unsecured Term Loan which provided for a single borrowing of up to $1.2 billion. Upon entry into the credit agreement in January 2023, BPLP exercised its option to draw $1.2 billion under the 2023 Unsecured Term Loan, a portion of which was used to repay in full BPLP’s $730.0 million unsecured term loan (the “2022 Unsecured Term Loan”), which was scheduled to mature on May 16, 2023. Under the credit agreement governing the 2023 Unsecured Term Loan, BPLP may, at any time prior to the maturity date, increase total commitments by up to an additional $300.0 million in aggregate principal amount by increasing the existing 2023 Unsecured Term Loan or incurring one or more additional term loans, in each case, subject to syndication of the increase and other conditions. The 2023 Unsecured Term Loan matures on May 16, 2024, with one 12-month extension option, subject to customary conditions.
On April 16, 2024, BPLP provided notice to exercise its one-year extension option on the 2023 Unsecured Term Loan. BPLP anticipates effectuating the extension on or prior to the current May 16, 2024 maturity date. Upon entry into the credit agreement, BPLP exercised its option to draw $1.2 billion undereffectiveness, the 2023 Unsecured Term Loan a portion of which was used to repay in full the 2022 Unsecured Term Loan, which was scheduled towill mature on May 16, 2023. There was no prepayment penalty associated with the repayment of the 2022 Unsecured Term Loan.2025.
At BPLP’s option, loans under the 2023 Unsecured Term Loan will bear interest at a rate per annum equal to (1) a base rate equal to the greatest of (a) the Federal Funds rate plus 0.5%, (b) the administrative agent’s prime rate, (c) Term SOFR for a one-month period plus 1.00%, and (d) 1.00%, in each case, plus a margin ranging from 0 to 60 basis points based on BPLP’s credit rating; or (2) a rate equal to adjusted Term SOFR with a one-month period plus a margin ranging from 75 to 160 basis points based on BPLP’s credit rating.
As of September 30, 2023, the 2023 Unsecured Term Loan bears interest at a rate equal to adjusted Term SOFR plus 0.85% per annum based on BPLP’s current credit rating at September 30, 2023 (See Note 7 to the Consolidated Financial Statements). At September 30, 2023, BPLP had $1.2 billion outstanding under the 2023 Unsecured Term Loan.
Derivative Instruments and Hedging Activities
On May 2, 2023, BPLP executed interest rate swaps in notional amounts aggregating $1.2 billion. These interest rate swaps were entered into to fix Term SOFR, the reference rate for BPLP’s 2023 Unsecured Term Loan, at a weighted-average rate of 4.6420% for the period commencing on May 4, 2023 and ending on May 16, 2024 (See Note 7 to the Consolidated Financial Statements).
Based on BPLP’s March 31, 2024 credit rating, the 2023 Unsecured Term Loan bears interest at a rate equal to adjusted Term SOFR plus 0.95% per annum. At March 31, 2024, BPLP had $1.2 billion outstanding under the 2023 Unsecured Term Loan. After making an approximately $500.0 million optional repayment on April 29, 2024, the 2023 Unsecured Term Loan has an outstanding principal balance of $700.0 million as of May 2, 2024.
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Unsecured Senior Notes
For a description of BPLP’s outstanding unsecured senior notes as of September 30, 2023,March 31, 2024, see Note 6 to the Consolidated Financial Statements.
On May 15, 2023,February 1, 2024, BPLP completed a public offering of $750.0repaid $700.0 million in aggregate principal amount of its 6.500% unsecured3.800% senior notes due 2034.February 1, 2024. The notes were priced at 99.697% ofrepayment was completed with available cash and the principal amount to yield an effective rate (including financing fees) of approximately 6.619% per annum to maturity. The notes will mature on January 15, 2034, unless earlier redeemed. The aggregate net$600.0 million proceeds from the offering were approximately $741.3 million after deducting underwriting discounts and transaction expenses.
On September 1, 2023, BPLP completed the repayment of $500.0 million in aggregate principal amount of its 3.125% senior notes due September 1,mortgage loan entered into on October 26, 2023. The repayment price was approximately $507.8$713.3 million, which was equal to the stated principal plus approximately $7.8$13.3 million of accrued and unpaid interest to, but not including, the repayment date. Excluding the accrued and unpaid interest, the repayment price was equal to the principal amount being repaid.
Commercial Paper Program
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TableOn April 17, 2024, BPLP established an unsecured commercial paper program. Under the terms of Contents
the program, BPLP may issue, from time to time, unsecured commercial paper notes up to a maximum aggregate amount outstanding at any one time of $500 million with varying maturities of up to one year. The indenture relating to thenotes will be sold in private placements and will rank pari passu with all of BPLP’s other unsecured senior notes contains certain financial restrictions and requirements,indebtedness, including (1)its outstanding senior notes. The commercial paper program is backstopped by available capacity under BPLP's 2021 Credit Facility. As of May 2, 2024, BPLP had $500.0 million outstanding under its commercial paper program that bears interest at a leverage ratio notweighted-average rate of 5.58% per annum. Proceeds from the commercial paper program were used to exceed 60%, (2) a secured debt leverage ratio notreduce BPLP’s 2023 Unsecured Term Loan to exceed 50%, (3) an interest coverage ratio of greater than 1.50, and (4) an unencumbered asset value of not less than 150% of unsecured debt. At September 30, 2023, BPLP was in compliance with each of these financial restrictions and requirements.$700.0 million.
Mortgage Notes Payable
On January 8, 2024, we completed the acquisition of our joint venture partner’s 50% economic ownership interest in the joint venture that owns 901 New York Avenue located in Washington, DC (See Note 3 to the Consolidated Financial Statements). The property is subject to existing mortgage indebtedness. At acquisition, the mortgage loan had an outstanding balance of approximately $207.1 million, bore interest at 3.61% per annum and was scheduled to mature on January 5, 2025. The mortgage loan was recorded at fair value of approximately $198.7 million. On January 11, 2024, we modified the mortgage loan to provide for two extension options totaling five years of additional term, each subject to certain conditions.
The following represents the outstanding principal balances due under the mortgage notes payable, net at September 30, 2023 (See Note 14 to the Consolidated Financial Statements):March 31, 2024:
PropertiesPropertiesStated Interest RateGAAP Interest Rate (1)Stated Principal AmountDeferred Financing Costs, NetCarrying Amount
Carrying Amount (Partners Share)
Maturity DatePropertiesStated Interest RateGAAP Interest Rate (1)Stated Principal AmountFair Value Adjustment and Deferred Financing Costs, NetCarrying Amount
Carrying Amount (Partners Share)
Maturity Date
(dollars in thousands) (dollars in thousands)
Wholly-owned
901 New York Avenue
901 New York Avenue
901 New York Avenue3.61 %7.69 %$206,289 $(6,530)$199,759 N/A(2)January 5, 2025
Santa Monica Business ParkSanta Monica Business Park4.06 %6.53 %300,000 (3,649)296,351 N/A(3)(4)July 19, 2025
90 Broadway, 325 Main Street, 355 Main Street, and Cambridge East Garage (also known as Kendall Center Green Garage)90 Broadway, 325 Main Street, 355 Main Street, and Cambridge East Garage (also known as Kendall Center Green Garage)6.04 %6.26 %600,000 (6,139)593,861 N/A(3)(5)October 26, 2028
Subtotal
Consolidated Joint Ventures
Consolidated Joint Ventures
Consolidated Joint VenturesConsolidated Joint Ventures
767 Fifth Avenue (the General Motors Building)767 Fifth Avenue (the General Motors Building)3.43 %3.64 %$2,300,000 $(12,869)$2,287,131 $914,898 (2)(3)(4)June 9, 2027
767 Fifth Avenue (the General Motors Building)
767 Fifth Avenue (the General Motors Building)3.43 %3.64 %2,300,000 (11,122)2,288,878 $915,590 (3)(6)(7)June 9, 2027
601 Lexington Avenue601 Lexington Avenue2.79 %2.93 %1,000,000 (11,157)988,843 444,979 (2)(5)January 9, 2032601 Lexington Avenue2.79 %2.93 %1,000,000 (10,482)(10,482)989,518 989,518 445,283 445,283 (3)(8)(3)(8)January 9, 2032
Subtotal
TotalTotal$3,300,000 $(24,026)$3,275,974 $1,359,877 
Total
Total
_______________ 
(1)The GAAP interest rate differs from the stated interest rate due to the inclusion of the amortization of financing charges, and the effects of hedging transactions (if any) and adjustments required under Accounting Standards Codification 805 “Business Combinations” to reflect loans and swaps at their fair values (if any).
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(2)Deferred financing costs, net includes an approximately $6.5 million fair value interest adjustment. The loan includes two extension options, subject to certain conditions.
(3)The mortgage loan requires interest only payments with a balloon payment due at maturity.
(3)(4)The mortgage loan bears interest at a variable rate of SOFR plus 1.38% per annum. The borrower under the loan entered into three interest rate swap contracts with notional amounts aggregating $300.0 million to fix SOFR at a weighted-average fixed interest rate of 2.679% for the period commencing on February 1, 2023 and ending on April 1, 2025. Stated interest rate reflects the weighted average fixed interest rate based on the interest rate swap contracts plus 1.38% per annum. Deferred financing costs, net includes an approximately $3.6 million fair value interest adjustment and excludes the adjustment required to reflect the interest rate swap at fair value upon acquisition of approximately $5.7 million.
(5)The mortgage loan bears interest at a variable rate of Daily Compounded SOFR plus 2.25% per annum. On December 7, 2023, BPLP entered into three interest rate swap contracts with notional amounts aggregating $600.0 million to fix Daily Compounded SOFR at a weighted-average fixed interest rate of 3.7925% for the period commencing on December 15, 2023 and ending on October 26, 2028. Stated interest rate reflects the weighted average fixed interest rate based on the interest rate swap contracts plus 2.25% per annum.
(6)This property is owned by a consolidated entity in which we have a 60% interest. The partners’ share of the carrying amount has been adjusted for basis differentials.
(4)(7)In connection with the refinancing of the loan, we guaranteed the consolidated entity’s obligation to fund various reserves for tenant improvement costs and allowances, leasing commissions and free rent obligations in lieu of cash deposits. As of September 30, 2023,March 31, 2024, the maximum funding obligation under the guarantee was approximately $10.0$8.5 million. We earn a fee from the joint venture for providing the guarantee and have an agreement with our partners to reimburse the joint venture for their share of any payments made under the guarantee (See Note 8 to the Consolidated Financial Statements).
(5)(8)This property is owned by a consolidated entity in which we have a 55% interest.
Derivative Instruments and Hedging Activities
As of March 31, 2024, we had $2.1 billion of interest rate swaps outstanding, where hedge accounting was elected, with a fair value of approximately $12.3 million. For a description of these interest rate swaps, see Note 7 to the Consolidated Financial Statements.
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Investment in Unconsolidated Joint Ventures - Secured Debt
We have investments in unconsolidated joint ventures with our effective ownership interests ranging from 20% to 55%approximately 71%. SeventeenFourteen of these ventures have mortgage indebtedness. We exercise significant influence over, but do not control, these entities. As a result, we account for them using the equity method of accounting. See also Note 5 to the Consolidated Financial Statements. At September 30, 2023,March 31, 2024, the aggregate carrying amount of debt, including both our and our partners’ share, incurred by these ventures was approximately $4.0$3.2 billion (of which our proportionate share is approximately $1.5$1.4 billion). The table below summarizes the outstanding debt of these joint venture properties at September 30, 2023.March 31, 2024. In addition to other guarantees specifically noted in the table, we have agreed to customary environmental indemnifications and nonrecourse carve-outs (e.g., guarantees against fraud, misrepresentation and bankruptcy) as well as the completion of development projects on certain of the loans. 
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PropertiesPropertiesNominal % OwnershipStated Interest RateGAAP Interest Rate (1)Stated Principal AmountDeferred Financing Costs, NetCarrying AmountCarrying Amount (Our share) Maturity Date
Properties
PropertiesNominal % OwnershipStated Interest RateGAAP Interest Rate (1)Term of Variable Rate + SpreadStated Principal AmountDeferred Financing Costs, NetCarrying AmountCarrying Amount (Our share) Maturity Date
(dollars in thousands) (dollars in thousands)
Santa Monica Business Park55.00 %4.06 %4.23 %$300,000 $(958)$299,042 $164,473 (2)(4)July 19, 2025
360 Park Avenue South360 Park Avenue South71.11 %7.83 %8.28 %Adjusted Term SOFR + 2.40%$220,000 $(705)$219,295 $155,940 (2)(3)(4)December 14, 2024
Market Square NorthMarket Square North50.00 %7.74 %7.92 %125,000 (482)124,518 62,259 (2)(3) (5)November 10, 2025Market Square North50.00 %7.73 %7.91 %SOFR + 2.41%125,000 (368)(368)124,632 124,632 62,316 62,316 (2)(3)(5)(2)(3)(5)November 10, 2025
1265 Main Street1265 Main Street50.00 %3.77 %3.84 %34,895 (229)34,666 17,333 January 1, 20321265 Main Street50.00 %3.77 %3.84 %N/A34,424 (216)(216)34,208 34,208 17,104 17,104 January 1, 2032January 1, 2032
Colorado CenterColorado Center50.00 %3.56 %3.59 %550,000 (691)549,309 274,655 (2)August 9, 2027Colorado Center50.00 %3.56 %3.59 %N/A550,000 (601)(601)549,399 549,399 274,700 274,700 (2)(2)August 9, 2027
Dock 72Dock 7250.00 %7.82 %8.08 %198,383 (1,011)197,372 98,686 (2)(6)December 18, 2025Dock 7250.00 %7.83 %8.09 %SOFR +2.50%198,383 (825)(825)197,558 197,558 98,779 98,779 (2)(6)(2)(6)December 18, 2025
The Hub on Causeway - PodiumThe Hub on Causeway - Podium50.00 %7.35 %7.75 %154,329 (1,238)153,091 76,546 (2)(3) (7)September 8, 2025The Hub on Causeway - Podium50.00 %7.35 %7.75 %Daily Simple SOFR + 2.50%154,329 (887)(887)153,442 153,442 76,721 76,721 (2)(3)(7)(2)(3)(7)September 8, 2025
Hub50HouseHub50House50.00 %4.43 %4.51 %185,000 (1,189)183,811 91,906 (2)(8)June 17, 2032Hub50House50.00 %4.43 %4.51 %SOFR + 1.35%185,000 (1,120)(1,120)183,880 183,880 91,940 91,940 (2)(8)(2)(8)June 17, 2032
100 Causeway Street100 Causeway Street50.00 %6.80 %6.95 %333,579 (439)333,140 166,570 (2)(3) (9)September 5, 2024100 Causeway Street50.00 %6.80 %6.94 %SOFR + 1.48%333,579 (203)(203)333,376 333,376 166,688 166,688 (2)(3)(2)(3)September 5, 2024
7750 Wisconsin Avenue (Marriott International Headquarters)7750 Wisconsin Avenue (Marriott International Headquarters)50.00 %6.68 %6.83 %251,542 (220)251,322 125,661 (2)(3) (10)April 26, 20247750 Wisconsin Avenue (Marriott International Headquarters)50.00 %6.67 %6.82 %SOFR + 1.35%251,542 (406)(406)251,136 251,136 125,568 125,568 (2)(2)April 26, 2025
360 Park Avenue South42.21 %7.83 %8.28 %220,000 (1,206)218,794 92,353 (2)(3) (11)December 14, 2024
Safeco PlazaSafeco Plaza33.67 %4.82 %4.96 %250,000 (992)249,008 83,841 (2)(12)September 1, 2026Safeco Plaza33.67 %4.82 %7.73 %SOFR + 2.32%250,000 (822)(822)249,178 249,178 83,898 83,898 (2)(9)(2)(9)September 1, 2026
500 North Capitol Street, NW500 North Capitol Street, NW30.00 %6.83 %7.16 %105,000 (755)104,245 31,104 (2)(13)June 5, 2026500 North Capitol Street, NW30.00 %6.83 %7.16 %N/A105,000 (614)(614)104,386 104,386 31,178 31,178 (2)(10)(2)(10)June 5, 2026
200 Fifth Avenue200 Fifth Avenue26.69 %4.34 %5.60 %600,000 (8,575)591,425 150,193 (2)(14)November 24, 2028200 Fifth Avenue26.69 %4.34 %5.60 %Term SOFR + 1.41%600,000 (7,764)(7,764)592,236 592,236 151,190 151,190 (2)(11)(2)(11)November 24, 2028
901 New York Avenue25.00 %3.61 %3.69 %208,686 (223)208,463 52,116   January 5, 2025
3 Hudson Boulevard3 Hudson Boulevard25.00 %9.04 %9.04 %80,000 — 80,000 20,000 (2) (15)February 9, 20243 Hudson Boulevard25.00 %9.04 %9.04 %Term SOFR + 3.61%80,000 — — 80,000 80,000 20,000 20,000 (2)(12)(2)(12)May 9, 2024
Metropolitan Square20.00 %7.25 %8.03 %420,000 (1,712)418,288 — (2)(3) (16)April 9, 2024
Skymark - Reston Next ResidentialSkymark - Reston Next Residential20.00 %7.33 %7.65 %53,665 (1,172)52,493 10,499 (2)(3) (17)May 13, 2026Skymark - Reston Next Residential20.00 %7.33 %7.65 %SOFR + 2.00%90,767 (948)(948)89,819 89,819 17,964 17,964 (2)(3)(13)(2)(3)(13)May 13, 2026
TotalTotal$4,070,079 $(21,092)$4,048,987 $1,518,195   
_______________ 
(1)The GAAP interest rate differs from the stated interest rate due to the inclusion of the amortization of financing charges,costs, which includes mortgage recording fees.fees, the effects of hedging transactions (if any) and adjustments required under Accounting Standards Codification 805 “Business Combinations” to reflect loans at their fair values (if any).
(2)The loan requires interest only payments with a balloon payment due at maturity.
(3)The loan includes certain extension options, subject to certain conditions.
(4)The loan bears interest at aspread on the variable rate equalmay be reduced, subject to SOFR plus 1.38% per annum. A subsidiary of the joint venture entered into interest rate swap contracts with notional amounts aggregating $300.0 million through April 1, 2025, resulting in a fixed rate of approximately 4.059% per annum through the expiration of the interest rate swap contracts.certain conditions.
(5)The loan bears interest at a variable rate equal to the greater of (1) the sum of (x) SOFR and (y) 2.41% or (2) 2.80% per annum.
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(6)The loan bears interest at a variable rate equal to (1) the greater of (x) SOFR or (y) 0.25%, plus (2) 2.50% per annum.
(7)The loan bears interest at a variable rate equal to Daily Simple SOFR plus 2.50% per annum. The joint venture entered into interest rate swap contracts with notional amounts aggregating $154.3 million through September 2, 2025, resulting in a fixed rate of approximately 7.35% per annum through the expiration of the interest rate swap contracts.
(8)The loan bears interest at a variable rate equal to SOFR plus 1.35% per annum. The joint venture entered into interest rate swap contracts with notional amounts aggregating $185.0 million through April 10, 2032, resulting in a fixed rate of approximately 4.432% per annum through the expiration of the interest rate swap contracts.
(9)The loan bears interest at a variable rate equal to SOFR plus 1.48% per annum.
(10)The loan bears interest at a variable rate equal to SOFR plus 1.35% per annum.
(11)The loan bears interest at a variable rate equal to Adjusted Term SOFR plus 2.40% per annum. The spread on the variable rate may be reduced, subject to certain conditions.
(12)The loan bears interest at a variable rate equal to the greater of (x) 2.35% or (y) SOFR plus 2.32% per annum. The joint venture entered into an interest rate cap agreement with a financial institution to limit its exposure to
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increases in the SOFR rate at a cap of 2.50% per annum on a notional amount of $250.0 million through September 1, 2024.
(13)(10)The indebtedness consists of (x) a $70.0 million mortgage loan payable (Note A) which bears interest at a fixed rate of 6.23% per annum, and (y) a $35.0 million mortgage loan payable (Note B) which bears interest at a fixed rate of 8.03% per annum. We provided $10.5 million of the Note B mortgage financing to the joint venture. Our portion of the loan has beenis reflected as Related Party Note Receivable,Receivables, Net on our Consolidated Balance Sheets.
(14)(11) The loan bears interest at a variable rate equal to Term SOFR plus approximately 1.41% per annum. The joint venture entered into interest rate swap contracts with notional amounts aggregating $600.0 million through June 2028, resulting in a fixed rate of approximately 4.34% per annum through the expiration of the interest rate swap contracts. In addition to items noted in footnote one above, the GAAP interest rate includesThe deferred financing costs, net include the adjustment required to reflect the loan and interest rate swap at fair value upon acquisition.
(15)(12)We provided $80.0 million of mortgage financing to the joint venture. The loan bears interest at a variable rate equal to Term SOFR plus 3.61% per annum. The loan has beenis reflected as Related Party Note Receivable,Receivables, Net on our Consolidated Balance Sheets. As of September 30, 2023,March 31, 2024, the loan has approximately $25.6$30.4 million of accrued interest due at the maturity date.
(16)The joint venture completed a two-step restructuring of the ownership in this property, which resulted in (i) an affiliate of the existing mezzanine lender purchasing the property and becoming the a new property owner and us no longer having an equity interest in the property and (ii) us becoming a co-lender of up to $20.0 million under the New Mezz Loan. Step one of the restructuring was completed on September 13, 2023, and resulted in, among other things, (i) the cessation of our obligation to fund future investments through our then 20% equity interest, which caused us to recognize a gain on investment of approximately $35.8 million related to its deficit investment balance, which was primarily due to excess distributions, and (ii) the removal of the property from our in-service portfolio. Step two of the restructuring was completed on October 2, 2023, and included (i) the sale of the property and assignment of the Senior Loan to the new owner, and (ii) the closing of a New Mezz Loan with a maximum principal amount of $100.0 million that is senior to the Existing Mezz Loan and subordinate to the Senior Loan (See Notes 5 and 14 to the Consolidated Financial Statements).
(17)(13)The construction financing has a borrowing capacity of $140.0 million. The construction financing bears interest at a variable rate equal to SOFR plus 2.00% per annum.
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State and Local Tax Matters 
Because BXP is organized and qualifies as a REIT, it is generally not subject to federal income taxes, but is subject to certain state and local taxes. In the normal course of business, certain entities through which we own real estate either have undergone, or are currently undergoing, tax audits or other inquiries. Although we believe that we have substantial arguments in favor of our position in the ongoing audits, in some instances there is no controlling precedent or interpretive guidance on the specific point at issue. Collectively, tax deficiency notices received to date from the jurisdictions conducting the ongoing audits have not been material. However, there can be no assurance that future audits will not occur with increased frequency or that the ultimate result of such audits will not have a material adverse effect on our results of operations. 
Insurance
For information concerning our insurance program, see Note 8 to the Consolidated Financial Statements.
Funds from Operations
Pursuant to the revised definition of Funds from Operations adopted by the Board of Governors of the National Association of Real Estate Investment Trusts (“Nareit”), we calculate Funds from Operations, or “FFO,” for each of BXP and BPLP by adjusting net income (loss) attributable to Boston Properties, Inc. and net income (loss) attributable to Boston Properties Limited Partnership (computed in accordance with GAAP), respectively, for gains (or losses) from sales of properties, including a change in control, impairment losses on depreciable real estate consolidated on our balance sheet, impairment losses on our investments in unconsolidated joint ventures driven by a measurable decrease in the fair value of depreciable real estate held by the unconsolidated joint ventures and our share of real estate-related depreciation and amortization. FFO is a non-GAAP financial measure. We believe the presentation of FFO, combined with the presentation of required GAAP financial measures, improves the understanding of operating results of REITs among the investing public and helps make comparisons of REIT operating results more meaningful. Management generally considers FFO to be a useful measuresmeasure for understanding and comparing our operating results because, by excluding gains and losses related to sales or a change in control of previously depreciated operating real estate assets, impairment losses and real estate asset depreciation and amortization (which can differ across owners of similar assets in similar condition based on historical cost accounting and useful life estimates), FFO can help investors compare the operating performance of a company’s real estate across reporting periods and to the operating performance of other companies.
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Our computation of FFO may not be comparable to FFO reported by other REITs or real estate companies that do not define the term in accordance with the current Nareit definition or that interpret the current Nareit definition differently. We believe that in order to facilitate a clear understanding of our operating results, FFO should be examined in conjunction with net income (loss) attributable to Boston Properties, Inc. and net income (loss) attributable to Boston Properties Limited Partnership as presented in our Consolidated Financial Statements. FFO should not be considered as a substitute for net income (loss) attributable to Boston Properties, Inc. or net income (loss) attributable to Boston Properties Limited Partnership (determined in accordance with GAAP) or any other GAAP financial measures and should only be considered together with and as a supplement to our financial information prepared in accordance with GAAP.  
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BXP
The following table presents a reconciliation of net income (loss) attributable to Boston Properties, Inc. to FFO attributable to Boston Properties, Inc. for the three months ended September 30, 2023March 31, 2024 and 2022:2023:
 Three months ended September 30,
 20232022
 (in thousands)
Net income (loss) attributable to Boston Properties, Inc.$(111,826)$360,977 
Add:
Noncontrolling interest—common units of the Operating Partnership(12,626)40,883 
Noncontrolling interests in property partnerships20,909 18,801 
Net income (loss)(103,543)420,661 
Add:
Depreciation and amortization207,435 190,675 
Noncontrolling interests in property partnerships’ share of depreciation and amortization(18,174)(17,706)
BXP’s share of depreciation and amortization from unconsolidated joint ventures25,666 21,485 
Corporate-related depreciation and amortization(446)(431)
Impairment losses included within loss on investment unconsolidated joint ventures (1)272,603 — 
Less:
Gain on investment included within loss from unconsolidated joint ventures (2)35,756 — 
Gains on sales of real estate517 262,345 
Unrealized loss on non-real estate investment(51)— 
Noncontrolling interests in property partnerships20,909 18,801 
Funds from Operations (FFO) attributable to the Operating Partnership326,410 333,538 
Less:
Noncontrolling interest—common units of the Operating Partnership’s share of funds from operations33,588 33,787 
Funds from Operations attributable to Boston Properties, Inc.$292,822 $299,751 
Our percentage share of Funds from Operations—basic89.71 %89.87 %
Weighted average shares outstanding—basic156,880 156,754 
___________
(1)During the three months ended September 30, 2023, we recognized an other-than-temporary impairment loss on our investments in Platform 16, 360 Park Avenue South, 200 Fifth Avenue and Safeco Plaza of approximately $155.2 million, $54.0 million, $33.4 million and $29.9 million, respectively (See Note 5 to the Consolidated Financial Statements).
(2)On September 13, 2023, a joint venture in which we owned a 20% equity interest completed the first step of a two-step restructuring of the ownership in Metropolitan Square, which resulted in, among other things, (i) the cessation of our obligation to fund future investments through our then 20% equity interest, which caused us to recognize a gain on investment of approximately $35.8 million related to our deficit investment balance, which was primarily due to excess distributions, and (ii) the removal of the property from our in-service portfolio (See Notes 5 and 14 of the Consolidated Financial Statements).
 Three months ended March 31,
 20242023
 (in thousands)
Net income attributable to Boston Properties, Inc.$79,883 $77,890 
Add:
Noncontrolling interest—common units of the Operating Partnership9,500 9,078 
Noncontrolling interests in property partnerships17,221 18,660 
Net income106,604 105,628 
Add:
Depreciation and amortization218,716 208,734 
Noncontrolling interests in property partnerships’ share of depreciation and amortization(18,695)(17,711)
BXP’s share of depreciation and amortization from unconsolidated joint ventures20,223 25,645 
Corporate-related depreciation and amortization(419)(469)
Non-real estate depreciation and amortization2,130 — 
Impairment loss13,615 — 
Less:
Gain (loss) on sale / consolidation included within loss from unconsolidated joint ventures21,696 — 
Unrealized gain on non-real estate investment396 259 
Noncontrolling interests in property partnerships17,221 18,660 
Funds from Operations (FFO) attributable to the Operating Partnership common unitholders (including Boston Properties, Inc.)302,861 302,908 
Less:
Noncontrolling interest—common units of the Operating Partnership’s share of funds from operations31,588 30,957 
Funds from Operations attributable to Boston Properties, Inc.$271,273 $271,951 
Our percentage share of Funds from Operations—basic89.57 %89.78 %
Weighted average shares outstanding—basic156,983 156,803 
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The following tables presents a reconciliation of net income (loss) attributable to Boston Properties, Inc. to Diluted FFO attributable to Boston Properties, Inc. for income (numerator) and shares/units (denominator) for the three months ended September 30, 2023March 31, 2024 and 2022:2023:
Three months ended September 30,
20232022
(in thousands)
Net income (loss) attributable to Boston Properties, Inc.$(111,826)$360,977 
Add:
(in thousands)
Net income attributable to Boston Properties, Inc.
Add:
Add:
Add:
Noncontrolling interest—common units of the Operating Partnership
Noncontrolling interest—common units of the Operating Partnership
Noncontrolling interest—common units of the Operating PartnershipNoncontrolling interest—common units of the Operating Partnership(12,626)40,883 
Noncontrolling interests in property partnershipsNoncontrolling interests in property partnerships20,909 18,801 
Net income (loss)(103,543)420,661 
Noncontrolling interests in property partnerships
Noncontrolling interests in property partnerships
Net income
Net income
Net income
Add:
Add:
Add:Add:
Depreciation and amortizationDepreciation and amortization207,435 190,675 
Depreciation and amortization
Depreciation and amortization
Noncontrolling interests in property partnerships’ share of depreciation and amortization
Noncontrolling interests in property partnerships’ share of depreciation and amortization
Noncontrolling interests in property partnerships’ share of depreciation and amortizationNoncontrolling interests in property partnerships’ share of depreciation and amortization(18,174)(17,706)
BXP’s share of depreciation and amortization from unconsolidated joint venturesBXP’s share of depreciation and amortization from unconsolidated joint ventures25,666 21,485 
BXP’s share of depreciation and amortization from unconsolidated joint ventures
BXP’s share of depreciation and amortization from unconsolidated joint ventures
Corporate-related depreciation and amortizationCorporate-related depreciation and amortization(446)(431)
Impairment losses included within loss on investment unconsolidated joint ventures (1)272,603 — 
Corporate-related depreciation and amortization
Corporate-related depreciation and amortization
Non-real estate depreciation and amortization
Non-real estate depreciation and amortization
Non-real estate depreciation and amortization
Impairment loss
Impairment loss
Impairment loss
Less:Less:
Gain on investment included within loss from unconsolidated joint ventures (2)35,756 — 
Gains on sales of real estate517 262,345 
Unrealized loss on non-real estate investment(51)— 
Noncontrolling interests in property partnerships20,909 18,801 
Less:
Less:
Gain (loss) on sale / consolidation included within loss from unconsolidated joint ventures
Gain (loss) on sale / consolidation included within loss from unconsolidated joint ventures
Gain (loss) on sale / consolidation included within loss from unconsolidated joint ventures
Funds from Operations (FFO) attributable to the Operating Partnership326,410 333,538 
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment
Noncontrolling interests in property partnerships
Noncontrolling interests in property partnerships
Noncontrolling interests in property partnerships
Funds from Operations (FFO) attributable to the Operating Partnership common unitholders (including Boston Properties, Inc.)
Funds from Operations (FFO) attributable to the Operating Partnership common unitholders (including Boston Properties, Inc.)
Funds from Operations (FFO) attributable to the Operating Partnership common unitholders (including Boston Properties, Inc.)
Effect of Dilutive Securities:
Effect of Dilutive Securities:
Effect of Dilutive Securities:Effect of Dilutive Securities:
Stock based compensationStock based compensation— — 
Stock based compensation
Stock based compensation
Diluted FFO
Diluted FFO
Diluted FFODiluted FFO326,410 333,538 
Less:Less:
Less:
Less:
Noncontrolling interest—common units of the Operating Partnership’s share of diluted FFONoncontrolling interest—common units of the Operating Partnership’s share of diluted FFO33,522 33,687 
Diluted FFO attributable to Boston Properties, Inc. (3)$292,888 $299,851 
Noncontrolling interest—common units of the Operating Partnership’s share of diluted FFO
Noncontrolling interest—common units of the Operating Partnership’s share of diluted FFO
Diluted FFO attributable to Boston Properties, Inc. (1)
Diluted FFO attributable to Boston Properties, Inc. (1)
Diluted FFO attributable to Boston Properties, Inc. (1)
___________
(1)During the three months ended September 30, 2023, we recognized an other-than-temporary impairment loss on our investments in Platform 16, 360 Park Avenue South, 200 Fifth Avenue and Safeco Plaza of approximately $155.2 million, $54.0 million, $33.4 million and $29.9 million, respectively (See Note 5 to the Consolidated Financial Statements).
(2)On September 13, 2023, a joint venture in which we owned a 20% equity interest completed the first step of a two-step restructuring of the ownership in Metropolitan Square, which resulted in, among other things, (i) the cessation of our obligation to fund future investments through our then 20% equity interest, which caused us to recognize a gain on investment of approximately $35.8 million related to our deficit investment balance, which was primarily due to excess distributions, and (ii) the removal of the property from our in-service portfolio (See Notes 5 and 14 of the Consolidated Financial Statements).
(3)BXP’s share of diluted Funds from Operations was 89.73%89.58% and 89.90%89.79% for the three months ended September 30,March 31, 2024 and 2023, and 2022, respectively.
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Three months ended September 30,
20232022
shares/units (in thousands)
shares/units (in thousands)
shares/units (in thousands)
shares/units (in thousands)
Basic Funds from Operations
Basic Funds from Operations
Basic Funds from OperationsBasic Funds from Operations174,882 174,416 
Effect of Dilutive Securities:Effect of Dilutive Securities:
Effect of Dilutive Securities:
Effect of Dilutive Securities:
Stock based compensation
Stock based compensation
Stock based compensationStock based compensation389 379 
Diluted Funds from OperationsDiluted Funds from Operations175,271 174,795 
Diluted Funds from Operations
Diluted Funds from Operations
Less:
Less:
Less:Less:
Noncontrolling interest—common units of the Operating Partnership’s share of diluted Funds from OperationsNoncontrolling interest—common units of the Operating Partnership’s share of diluted Funds from Operations18,002 17,662 
Noncontrolling interest—common units of the Operating Partnership’s share of diluted Funds from Operations
Noncontrolling interest—common units of the Operating Partnership’s share of diluted Funds from Operations
Diluted Funds from Operations attributable to Boston Properties, Inc. (1)Diluted Funds from Operations attributable to Boston Properties, Inc. (1)157,269 157,133 
Diluted Funds from Operations attributable to Boston Properties, Inc. (1)
Diluted Funds from Operations attributable to Boston Properties, Inc. (1)
 _______________
(1)BXP’s share of diluted Funds from Operations was 89.73%89.58% and 89.90%89.79% for the three months ended September 30,March 31, 2024 and 2023, and 2022, respectively.
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BPLP
The following table presents a reconciliation of net income (loss) attributable to Boston Properties Limited Partnership to FFO attributable to Boston Properties Limited Partnership for the three months ended September 30, 2023March 31, 2024 and 2022:2023:
Three months ended September 30,
20232022
(in thousands)Three months ended March 31,
Net income (loss) attributable to Boston Properties Limited Partnership$(122,696)$403,578 
Add:
20242023
(in thousands)
Net income attributable to Boston Properties Limited Partnership
Add:
Noncontrolling interests in property partnershipsNoncontrolling interests in property partnerships20,909 18,801 
Net income (loss)(101,787)422,379 
Noncontrolling interests in property partnerships
Noncontrolling interests in property partnerships
Net income
Add:Add:
Depreciation and amortization
Depreciation and amortization
Depreciation and amortizationDepreciation and amortization205,679 188,969 
Noncontrolling interests in property partnerships’ share of depreciation and amortizationNoncontrolling interests in property partnerships’ share of depreciation and amortization(18,174)(17,706)
BXP’s share of depreciation and amortization from unconsolidated joint venturesBXP’s share of depreciation and amortization from unconsolidated joint ventures25,666 21,485 
Corporate-related depreciation and amortizationCorporate-related depreciation and amortization(446)(431)
Impairment losses included within loss on investment unconsolidated joint ventures (1)272,603 — 
Non-real estate depreciation and amortization
Impairment loss
Less:Less:
Gain on investment included within loss from unconsolidated joint ventures (2)35,756 — 
Gains on sales of real estate517 262,357 
Less:
Less:
Unrealized loss on non-real estate investment(51)— 
Noncontrolling interests in property partnerships20,909 18,801 
Gain (loss) on sale / consolidation included within loss from unconsolidated joint ventures
Gain (loss) on sale / consolidation included within loss from unconsolidated joint ventures
Gain (loss) on sale / consolidation included within loss from unconsolidated joint ventures
Funds from Operations attributable to Boston Properties Limited Partnership (3)$326,410 $333,538 
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment
Noncontrolling interests in property partnerships
Funds from Operations attributable to Boston Properties Limited Partnership (1)
Weighted average shares outstanding—basicWeighted average shares outstanding—basic174,882 174,416 
 _______________
(1)During the three months ended September 30, 2023, we recognized an other-than-temporary impairment loss on our investments in Platform 16, 360 Park Avenue South, 200 Fifth Avenue and Safeco Plaza of approximately $155.2 million, $54.0 million, $33.4 million and $29.9 million, respectively (See Note 5 to the Consolidated Financial Statements).
(2)On September 13, 2023, a joint venture in which we owned a 20% equity interest completed the first step of a two-step restructuring of the ownership in Metropolitan Square, which resulted in, among other things, (i) the cessation of our obligation to fund future investments through our then 20% equity interest, which caused us to recognize a gain on investment of approximately $35.8 million related to our deficit investment balance, which was primarily due to excess distributions, and (ii) the removal of the property from our in-service portfolio (See Notes 5 and 14 of the Consolidated Financial Statements).
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(3)Our calculation includes OP Units and vested LTIP Units (including vested 2012 OPP Units and vested 2013 - 20202021 MYLTIP Units).
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The following tables presents a reconciliation of net income (loss) attributable to Boston Properties Limited Partnership to Diluted FFO attributable to Boston Properties Limited Partnership for income (numerator) and shares/units (denominator) for the three months ended September 30, 2023March 31, 2024 and 2022:2023:
Three months ended September 30,
20232022
(in thousands)Three months ended March 31,
Net income (loss) attributable to Boston Properties Limited Partnership$(122,696)$403,578 
Add:
20242023
(in thousands)
Net income attributable to Boston Properties Limited Partnership
Add:
Noncontrolling interests in property partnershipsNoncontrolling interests in property partnerships20,909 18,801 
Net income (loss)(101,787)422,379 
Noncontrolling interests in property partnerships
Noncontrolling interests in property partnerships
Net income
Add:Add:
Depreciation and amortization
Depreciation and amortization
Depreciation and amortizationDepreciation and amortization205,679 188,969 
Noncontrolling interests in property partnerships’ share of depreciation and amortizationNoncontrolling interests in property partnerships’ share of depreciation and amortization(18,174)(17,706)
BXP’s share of depreciation and amortization from unconsolidated joint venturesBXP’s share of depreciation and amortization from unconsolidated joint ventures25,666 21,485 
Corporate-related depreciation and amortizationCorporate-related depreciation and amortization(446)(431)
Impairment losses included within loss on investment unconsolidated joint ventures (1)272,603 — 
Non-real estate depreciation and amortization
Impairment loss
Less:Less:
Gain on investment included within loss from unconsolidated joint ventures (2)35,756 — 
Gains on sales of real estate517 262,357 
Less:
Less:
Unrealized loss on non-real estate investment(51)— 
Noncontrolling interests in property partnerships20,909 18,801 
Gain (loss) on sale / consolidation included within loss from unconsolidated joint ventures
Gain (loss) on sale / consolidation included within loss from unconsolidated joint ventures
Gain (loss) on sale / consolidation included within loss from unconsolidated joint ventures
Funds from Operations attributable to Boston Properties Limited Partnership (3)326,410 333,538 
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment
Unrealized gain on non-real estate investment
Noncontrolling interests in property partnerships
Funds from Operations attributable to Boston Properties Limited Partnership (1)
Effect of Dilutive Securities:Effect of Dilutive Securities:
Stock based compensationStock based compensation— — 
Stock based compensation
Stock based compensation
Diluted Funds from Operations attributable to Boston Properties Limited PartnershipDiluted Funds from Operations attributable to Boston Properties Limited Partnership$326,410 $333,538 
_______________
(1)During the three months ended September 30, 2023, we recognized an other-than-temporary impairment loss on our investments in Platform 16, 360 Park Avenue South, 200 Fifth Avenue and Safeco Plaza of approximately $155.2 million, $54.0 million, $33.4 million and $29.9 million, respectively (See Note 5 to the Consolidated Financial Statements).
(2)On September 13, 2023, a joint venture in which we owned a 20% equity interest completed the first step of a two-step restructuring of the ownership in Metropolitan Square, which resulted in, among other things, (i) the cessation of our obligation to fund future investments through our then 20% equity interest, which caused us to recognize a gain on investment of approximately $35.8 million related to our deficit investment balance, which was primarily due to excess distributions, and (ii) the removal of the property from our in-service portfolio (See Notes 5 and 14 of the Consolidated Financial Statements).
(3)Our calculation includes OP Units and vested LTIP Units (including vested 2012 OPP Units and vested 2013 - 20202021 MYLTIP Units).
Three months ended September 30,
20232022
shares/units (in thousands)
shares/units (in thousands)
shares/units (in thousands)
shares/units (in thousands)
Basic Funds from Operations
Basic Funds from Operations
Basic Funds from OperationsBasic Funds from Operations174,882 174,416 
Effect of Dilutive Securities:Effect of Dilutive Securities:
Effect of Dilutive Securities:
Effect of Dilutive Securities:
Stock based compensation
Stock based compensation
Stock based compensationStock based compensation389 379 
Diluted Funds from OperationsDiluted Funds from Operations175,271 174,795 
Diluted Funds from Operations
Diluted Funds from Operations
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Material Cash Commitments
We have various service contracts with vendors related to our property management. In addition, we have certain other contracts we enter into in the ordinary course of business that may extend beyond one year. These contracts include terms that provide for cancellation with insignificant or no cancellation penalties. Contract terms are generally between three and five years.
During the three months ended September 30, 2023,March 31, 2024, we paid approximately $127.3$83.0 million to fund tenant-related obligations, including tenant improvements and leasing commissions.
In addition, during the three months ended September 30, 2023,March 31, 2024, we and our unconsolidated joint venture partners incurred approximately $36.9$117.6 million of new tenant-related obligations associated with approximately 996,700825,700 square feet of second generation leases, or approximately $37$142 per square foot. We signed approximately 59,100 68,200
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square feet of first generation leases. The tenant-related obligations for the development properties are included within the projects’ “Estimated Total Investment” referred to in “Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources.” In aggregate during the thirdfirst quarter of 2023,2024, we signed leases for approximately 1.1 million893,900 square feet of space and incurred aggregate tenant-related obligations of approximately $59.9$129.6 million, or approximately $57$145 per square foot.

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ITEM 3—Quantitative and Qualitative Disclosures about Market Risk.
We are exposed to certain market risks, one of the most predominant of which is a change in interest rates. IncreasesUnless we have entered into interest rate swaps or other derivatives to fix the interest rate, increases in interest rates can result in increased interest expense under our Revolving2021 Credit Facility, 2023 Unsecured Term Loan, certain mortgage loans and other debt that bears interest at variable rate debt to the extent we do not have interest rate swaps in place to hedge the effect of such rate increases.rates. Increases in interest rates can also result in increased interest expense when our fixed rate debt matures and needs to be refinanced.
As of September 30, 2023,March 31, 2024, approximately $13.8$13.3 billion of these borrowingsour indebtedness bore interest at fixed rates and therefore the fair value of these instruments is not affected by changes in the market interest rates. The remaining $1.2$2.1 billion of outstanding borrowingsindebtedness bore interest at a variable rate.rates, including $1.2 billion under the 2023 Unsecured Term Loan and $900.0 million of secured debt. However, we entered into interest rate swaps with notional amounts aggregating $2.1 billion, thus fixing the variabilityinterest rates for all, or a portion of the interest rateapplicable debt term (See Note 7 to the Consolidated Financial Statements for information pertaining to interest rate swap contracts in place as of September 30, 2023March 31, 2024 and their respective fair values). Therefore, as of September 30, 2023,March 31, 2024, we have no outstanding variable rate debt that has not been subject tofixed through an interest rate swap.
The following table presents our aggregate debt obligations carrying value, estimated fair value and where applicable, the corresponding weighted-average GAAP interest rates sorted by maturity date as of March 31, 2024.
The table below does not include our unconsolidated joint venture debt. For a discussion concerning our unconsolidated joint venture debt, including interest rate swaps, see Note 5 to the Consolidated Financial Statements and “Item 2Management’s Discussion and Analysis of Financial Condition and Results of OperationsLiquidity and Capital Resources—Investment in Unconsolidated Joint Ventures - Secured Debt.
The following table presents our aggregate debt obligations carrying value, estimated fair value and where applicable, the corresponding weighted-average GAAP interest rates sorted by maturity date as of September 30, 2023.
202320242025202620272028+TotalEstimated Fair Value
2024202420252026202720282029+TotalEstimated Fair Value
(dollars in thousands)
Mortgage debt, net
(dollars in thousands)
Mortgage debt, net
Fixed Rate
GAAP Average Interest Rate
Variable Rate
Variable Rate
Variable Rate
Subtotal
(dollars in thousands)
Mortgage debt, net
Unsecured debt, net
Fixed RateFixed Rate$(1,211)$(4,843)$(4,843)$(4,843)$2,297,138 $994,576 $3,275,974 $2,658,844 
GAAP Average Interest RateGAAP Average Interest Rate— %— %— %— %3.64 %2.93 %3.42 %
Variable RateVariable Rate— — — — — — — — 
Unsecured debt, net
Fixed Rate$— $699,733 $848,409 $1,992,508 $744,555 $6,203,363 $10,488,568 $9,163,931 
GAAP Average Interest Rate— %3.92 %3.35 %3.63 %6.92 %3.72 %3.91 %
Variable RateVariable Rate— 1,197,173 — — — — 1,197,173 1,195,007 
Variable Rate
Subtotal
Total DebtTotal Debt$(1,211)$1,892,063 $843,566 $1,987,665 $3,041,693 $7,197,939 $14,961,715 $13,017,782 
At September 30, 2023,March 31, 2024, the weighted-average coupon/stated interest rates on the fixed rate debt stated above was 3.84%3.68% per annum. At September 30, 2023,March 31, 2024, our outstanding variable rate debt totaled $1.2$2.1 billion, and all of itwhich was subject to interest rate swaps. At September 30, 2023,March 31, 2024, the coupon/weighted-average stated interest rate on our variable rate debt, including the effect of the interest rate swaps, was approximately 5.592%5.56% per annum. If market interest rates on our variable rate debt had been 100 basis points greater, total interest expense would have increased approximately $3.0 million and $9.0$5.3 million for the three and nine months ended September 30, 2023, respectively.March 31, 2024.
Our use of derivative instruments also involves certain additional risks such as counterparty credit risk, the enforceability of hedging contracts and the risk that unanticipated and significant changes in interest rates will cause a significant loss of basis in the contract. We believe that there is a low likelihood that these counterparties will fail to meet ourtheir obligations and we minimize our exposure by limiting counterparties to major banks who meet established credit and capital guidelines. There can be no assurance that we will adequately protect against the foregoing risks.
The fair value amounts were determined solely by considering the impact of hypothetical interest rates on our financial instruments. Due to the uncertainty of specific actions, we may undertake to minimize possible effects of market interest rate increases, this analysis assumes no changes in our financial structure.

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ITEM 4—Controls and Procedures.
Boston Properties, Inc.
(a) Evaluation of Disclosure Controls and Procedures. As of the end of the period covered by this report, our management, with the participation of Boston Properties, Inc.’s Chief Executive Officer (Principal Executive Officer) and Chief Financial Officer (Principal Financial Officer), evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended). Based upon that evaluation, Boston Properties, Inc.’s Chief Executive Officer and Chief Financial Officer concluded that these disclosure controls and procedures were effective as of the end of the period covered by this report.
(b) Changes in Internal Control Over Financial Reporting. No change in Boston Properties, Inc.’s internal control over financial reporting (as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934, as amended) occurred during the thirdfirst quarter of our fiscal year ending December 31, 20232024 that has materially affected, or is reasonably likely to materially affect, Boston Properties, Inc.’s internal control over financial reporting.
Boston Properties Limited Partnership
(a) Evaluation of Disclosure Controls and Procedures. As of the end of the period covered by this report, the management of Boston Properties, Inc., the sole general partner of Boston Properties Limited Partnership, with the participation of its Chief Executive Officer (Principal Executive Officer) and Chief Financial Officer (Principal Financial Officer), evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended). Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer of Boston Properties, Inc. concluded that these disclosure controls and procedures were effective as of the end of the period covered by this report.
(b) Changes in Internal Control Over Financial Reporting. No change in its internal control over financial reporting (as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934, as amended) occurred during the thirdfirst quarter of our fiscal year ending December 31, 20232024 that has materially affected, or is reasonably likely to materially affect, its internal control over financial reporting.

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PART II. OTHER INFORMATION
ITEM 1—Legal Proceedings.
We are subject to legal proceedings and claims that arise in the ordinary course of business. These matters are generally covered by insurance. Management believes that the final outcome of such matters will not have a material adverse effect on our financial position, results of operations or liquidity.
ITEM 1A—Risk Factors.
Except to the extent factual information disclosed elsewhere in this Quarterly Report on Form 10-Q relates to such risk factors (including, without limitation, the matters discussed in Part I, “Item 2—Management’s Discussion and Analysis of Financial Condition and Results of Operations”), there were no material changes to the risk factors disclosed in Part I, “Item 1A. Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2022.2023.
ITEM 2—Unregistered Sales of Equity Securities and Use of Proceeds and Issuer Purchases of Equity Securities
Boston Properties, Inc.
(a)During the three months ended September 30, 2023, BXP issued an aggregate of 79,076 shares of common stock in exchange for 79,076 common units of limited partnership held by certain limited partners of BPLP. Of these shares, 6,836 shares were issued in reliance on an exemption from registration under Section 4(a)(2) of the Securities Act of 1933, as amended. We relied on the exemption under Section 4(a)(2) based upon factual representations received from the limited partner who received the common shares.None
(b)Not Applicable.
(c)Issuer Purchases of Equity Securities.
Period(a)
Total Number of Shares of Common Stock
Purchased
(b)
Average Price Paid per Common Share
(c)
Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs
(d)
Maximum Number (or Approximate Dollar Value) of Shares that May Yet be Purchased under the Plans or Programs
July 1, 2023 – July 31, 2023— $— N/AN/A
August 1, 2023 – August 31, 2023— $— N/AN/A
September 1, 2023 – September 30, 20233,046 (1)$53.80 N/AN/A
Total3,046 $53.80 N/AN/A
Period(a)
Total Number of Shares of Common Stock
Purchased
(b)
Average Price Paid per Common Share
(c)
Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs
(d)
Maximum Number (or Approximate Dollar Value) of Shares that May Yet be Purchased under the Plans or Programs
January 1, 2024 – January 31, 202411,271 (1)$69.96 N/AN/A
February 1, 2024 – February 29, 20241,275 (1)$63.69 N/AN/A
March 1, 2024 – March 31, 2024— $— N/AN/A
Total12,546 $69.32 N/AN/A
___________
(1)Includes 561 shares of restricted common stock of BXP repurchased in connection with the termination of certain employees’ employment with BXP. Under the terms of the applicable restricted stock award agreements, the shares were repurchased by BXP at a price of $0.01 per share, which was the amount originally paid by such employees for such shares. Also Includes 2,485Represents shares of common stock of BXP surrendered by a certain employeeemployees to BXP to satisfy such employee’semployees’ tax withholding obligations in connection with the vesting of restricted common stock.
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Boston Properties Limited Partnership
(a)Each time BXP issues shares of common stock (other than in exchange for common units when such common units are presented for redemption), it contributes the proceeds of such issuance to BPLP in return for an equivalent number of partnership units with rights and preferences analogous to the shares issued. During the three months ended September 30, 2023,March 31, 2024, in connection with issuances of common stock by BXP pursuant to issuances of restricted common stock to employees under the Boston Properties, Inc. 2021 Stock Incentive Plan and purchases of common stock under the Boston Properties, Inc. 1999 Employee Stock Purchase Plan, BPLP issued an aggregate of 9,75084,546 common units to BXP in exchange for approximately $0.46$0.5 million, the aggregate proceeds of such common stock issuances to BXP. Such units were issued in reliance on an exemption from registration under Section 4(a)(2) of the Securities Act of 1933, as amended.
(b)Not Applicable.
(c)Issuer Purchases of Equity Securities.
Period(a)
Total Number of Units Purchased
 (b)
Average Price Paid per Unit
(c)
Total Number of Units Purchased as Part of Publicly Announced Plans or Programs
(d)
Maximum Number (or Approximate Dollar Value) of Units that May Yet be Purchased Under the Plans or Programs
July 1, 2023 – July 31, 2023— $— N/AN/A
August 1, 2023 – August 31, 2023— $— N/AN/A
September 1, 2023 – September 30, 20233,681 (1)$44.56 N/AN/A
Total3,681  $44.56 N/AN/A
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Period(a)
Total Number of Units Purchased
 (b)
Average Price Paid per Unit
(c)
Total Number of Units Purchased as Part of Publicly Announced Plans or Programs
(d)
Maximum Number (or Approximate Dollar Value) of Units that May Yet be Purchased Under the Plans or Programs
January 1, 2024 – January 31, 202411,271 (1)$69.96 N/AN/A
February 1, 2024 – February 29, 2024158,242 (2)$0.76 N/AN/A
March 1, 2024 – March 31, 20242,449 (3)$0.25 N/AN/A
Total171,962  $5.29 N/AN/A
___________
(1)Includes 561 common units previously held by BXP that were redeemed in connection with the repurchase of shares of restricted common stock of BXP in connection with the termination of certain employees’ employment with BXP and 635 LTIP units that were repurchased by BPLP in connection with the termination of a certain employee’s employment with BXP. Under the terms of the applicable restricted stock award agreements and LTIP unit vesting agreement, such shares were repurchased at a price of $0.01 per share and such LTIP units were repurchased at a price of $0.25 per unit, which were the amounts originally paid by such employees for such shares and units. Also includes 2,485Represents common units previously held by BXP that were redeemed in connection with the surrender of shares of restricted common stock of BXP by a certain employeeemployees to BXP to satisfy such employee’semployees’ tax withholding obligations in connection with the vesting of restricted common stock.
(2)Includes 155,625 2021 MYLTIP units. The measurement period for such 2021 MYLTIP units ended on February 1, 2024 and BXP’s total return to stockholders was sufficient for employees to earn and therefore become eligible to vest in a portion of the 2021 MYLTIP units. Also includes 1,342 LTIP units that were repurchased in connection with the termination of an employee’s employment with BXP. Under the terms of the applicable 2021 MYLTIP award agreements and LTIP unit vesting agreements, the 155,625 unearned 2021 MYLTIP units and 1,342 LTIP units were repurchased at a price of $0.25 per unit, which was the amount originally paid by each employee for the units. Also includes 1,275 common units previously held by BXP that were redeemed in connection with the surrender of shares of restricted common stock of BXP by employees to BXP to satisfy such employees’ tax withholding obligations in connection with the vesting of restricted common stock.
(3)Represents LTIP units that were repurchased in connection with the termination of an employee’s employment with BXP. Under the terms of the applicable LTIP unit vesting agreements, the LTIP units were repurchased at a price of $0.25 per unit, which was the amount originally paid by the employee for the units.
ITEM 3—Defaults Upon Senior Securities.
None.
ITEM 4—Mine Safety Disclosures.
None.
ITEM 5—Other Information.
(a)On November 4, 2023, the Company entered into an Amended and Restated Employment Agreement with Owen D. Thomas (the “Agreement”) pursuant to which Mr. Thomas will continue to serve as the Company’s Chief Executive Officer (“CEO”) through December 31, 2026. The term of Mr. Thomas’ previous Employment Agreement, dated April 2, 2018, ended June 30, 2023. The Agreement does not change Mr. Thomas’ base salary, target cash bonus or target total compensation for 2023.None.
The following is a summary of the material terms of the Agreement:
Term and Duties
(i)July 1, 2023 through December 31, 2026. There is no automatic renewal provision.
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(ii)As CEO, Mr. Thomas reports directly to the Board of Directors (the “Board”), and he must devote substantially all of his working time and efforts to the performance of his duties.
(iii)The Board agreed to nominate Mr. Thomas for re-election to the Board for so long as he remains CEO, and Mr. Thomas has agreed to resign from the Board upon termination of employment.
(iv)Mr. Thomas may participate as an officer or director of, or advisor to, any organization that is not engaged in commercial real estate activities (e.g., Nareit) and engage in religious, charitable or other community activities, provided that they do not materially restrict his ability to fulfill his obligations to the Company as CEO. Mr. Thomas may also continue serving on the Board of Lehman Brothers Holdings Inc. and may engage in “Minority Interest Passive Investments,” which are defined as acquiring, holding and exercising the voting rights associated with an investment made through (1) a non-controlling, minority interest in an entity or (2) the lending of money, in either case with the purpose or intent of obtaining a return on such investment but without management of the property or business to which the investment directly or indirectly relates and without any business or strategic consultation by Mr. Thomas.
Compensation and Benefits
(i)Annual base salary of $950,000, subject to annual review and may be increased but not decreased in the discretion of the Compensation Committee of the Board (the “Compensation Committee”).
(ii)For each calendar year during the term, Mr. Thomas shall have the opportunity to earn an annual bonus based on the achievement of Company and individual performance goals and other criteria, as determined by the Compensation Committee. Mr. Thomas’ target annual bonus shall be $2,350,000, and such target may be increased but not decreased. The actual earned bonus may range from 0 to 150% of the target based on the Compensation Committee’s evaluation of the achievement of Company and individual performance goals and other criteria. The earned annual bonus for any calendar year shall be paid in cash no later than March 15 of the following calendar year. For the avoidance of doubt, if the term of the agreement ends on December 31, 2026, Mr. Thomas shall be entitled to receive his bonus for 2026, without any pro ration, notwithstanding that Mr. Thomas may no longer be employed by the Company on the date on which such bonuses for 2026 are paid in 2027.
(iii)For each calendar year during the term, Mr. Thomas will be eligible to participate in the Company’s long-term incentive program, with the target amount of equity granted to be determined at the discretion of the Compensation Committee based on Company and individual performance and competitive peer group information. Equity awards may be provided in the form of stock options, restricted stock, restricted stock units and/or long-term incentive units of partnership interest in BPLP and may be subject to time-based or performance-based vesting, or both, as determined in the discretion of the Compensation Committee.
(iv)Mr. Thomas is eligible to participate in all of the Company’s employee benefit plans and programs as in effect from time to time for the Company’s senior executive employees, including medical/dental insurance, life insurance, disability insurance and deferred compensation plans.
(v)Mr. Thomas is entitled to the use of a Company-owned or leased automobile, a benefit he has declined every year since becoming CEO.
(vi)The Company has agreed to pay Mr. Thomas’ reasonable advisor fees (legal and tax) incurred in connection with the Agreement, up to a maximum of $25,000.
Severance Benefits and Retirement Eligibility
(i)Mr. Thomas’ employment with the Company is at-will, but his employment agreement provides for certain payments and benefits to him upon his separation from the Company in certain circumstances, including the following:
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(1)If the employment of Mr. Thomas is terminated by the Company without Cause or by Mr. Thomas for Good Reason not in connection with a Change in Control, then Mr. Thomas will be entitled to a severance amount equal to two times the sum of (x) his base salary plus (y) the amount of his cash bonus, if any, received in respect of the immediately preceding year (but not less than his target bonus). Mr. Thomas is also entitled to a pro rata target bonus for the year of termination and an additional 24 months of vesting in his time-based equity awards, acceleration of vesting of his performance-based awards to the extent provided in the relevant award agreements, and, subject to payment of premiums at the active employees’ rate, may also participate in the Company’s health plan for up to 24 months. Receipt of these payments and benefits (other than the prorated target bonus) is subject to Mr. Thomas executing a general release of claims against the Company.
(2)If the employment of Mr. Thomas is terminated by the Company without Cause or by Mr. Thomas for Good Reason upon or within 24 months after a Change in Control of the Company, then Mr. Thomas will be entitled to his pro rata target cash bonus for the year of termination and a lump sum severance amount equal to three times the sum of (x) his base salary plus (y) the amount of his average annual cash bonus for the three calendar years preceding the change in control (or his target bonus, if greater). Mr. Thomas will also be entitled to full vesting of his time-based equity awards, acceleration of vesting of his performance-based awards to the extent provided in the relevant award agreements, 36 months of financial counseling, tax preparation assistance and outplacement counseling, and, subject to payment of premiums at the active employees’ rate, may also participate in the Company’s health plan for up to 36 months.
(ii)Because Mr. Thomas is at least 62 years of age and has completed at least ten (10) years of employment with the Company, Mr. Thomas is deemed to have satisfied the requirements for retirement eligibility and, as a result, the Agreement provides that his time-based equity awards, whether currently outstanding or granted in the future, shall be deemed to be fully vested and performance-based equity awards that are earned will vest in full (without any proration of the award based on service time). In addition, upon a Qualified Retirement, Mr. Thomas shall be entitled to a prorated portion of his annual bonus for the year in which he retires.
(iii)Mr. Thomas is not entitled to participate in any of the Company’s change in control severance plans and he is not entitled to receive any tax gross-up payments. In the event that any payment or benefit to be paid or provided to Mr. Thomas would be subject to the golden parachute excise tax under Section 280G of the Internal Revenue Code, the payments and benefits will be reduced to the extent necessary to avoid the imposition of the excise tax if doing so would result in a greater after-tax benefit to Mr. Thomas.
(iv)The expiration of Mr. Thomas’ agreement on December 31, 2026 (1) will not constitute or result in a termination of employment by the Company without Cause or termination of employment by Mr. Thomas for Good Reason, and the severance provisions (other than retirement eligibility and related benefits) shall not apply, and (2) will constitute a Qualified Retirement. In addition, notwithstanding the expiration of the term on December 31, 2026 and consistent with the Company’s historical practice in respect of retiring executives, in 2027 Mr. Thomas shall receive an annual equity incentive award(s) in respect of services provided during calendar year 2026, and the terms and conditions of such awards, including the grant date target value and, generally, the type(s) of awards, shall be determined in the discretion of the Compensation Committee.
Restrictive Covenants
(i)While he is an officer and until the later of (1) one year after the termination of his employment for any reason or (2) the latest date of full vesting of any performance-based equity award, Mr. Thomas is prohibited from:
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(ii)participating as a significant owner or performing services in a senior leadership position of any business that owns, develops and manages primarily commercial office space real estate property at the time of termination of his employment; or
(iii)intentionally interfering with the Company’s relationships with certain of its tenants or employees, either for himself or any other business, person or entity.
(iv)The non-competition covenant shall not apply if Mr. Thomas’ employment is terminated following a Change in Control.
(v)Mr. Thomas is also subject to confidentiality requirements and post-termination litigation and regulatory cooperation obligations.
The terms “Cause,” “Change in Control,” “Good Reason” and “Qualified Retirement” have the meanings set forth in the Agreement. The foregoing summary of the Agreement does not purport to be complete and is subject to, and qualified in its entirety by reference to, the full text of the Agreement, which is included as Exhibit 10.1 hereto and incorporated herein by reference.
(b)None.
(c)During the three months ended September 30, 2023,March 31, 2024, none of our directors or officers (as defined in Rule 16a-1(f) of the Securities Exchange Act of 1934, as amended) adopted, terminated or modified a Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement (as such terms are defined in Item 408 of Regulation S-K).
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ITEM 6—Exhibits.
(a)Exhibits 
10.1*
31.1 
31.2 
31.3 
31.4 
32.1 
32.2 
32.3 
32.4 
101.SCHInline XBRL Taxonomy Extension Schema Document. (Filed herewith.)
101.CALInline XBRL Taxonomy Extension Calculation Linkbase Document. (Filed herewith.)
101.LABInline XBRL Taxonomy Extension Label Linkbase Document. (Filed herewith.)
101.PREInline XBRL Taxonomy Extension Presentation Linkbase Document. (Filed herewith.)
101.DEFInline XBRL Taxonomy Extension Definition Linkbase Document. (Filed herewith.)
104 Cover Page Interactive Data File (formatted as Inline XBRL with applicable taxonomy extension information contained in Exhibits 101*.). (Filed herewith.)
*Indicates management contract or compensatory plan or arrangement required to be filed or incorporated by reference as an exhibit to this Form 10-Q pursuant to Item 6 of Form 10-Q.
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SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.


BOSTON PROPERTIES, INC.
November 7, 2023May 10, 2024
/s/    MICHAEL R. WALSH        
Michael R. Walsh
Chief Accounting Officer
(duly authorized officer and principal accounting officer)
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SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.


 BOSTON PROPERTIES LIMITED PARTNERSHIP
By: Boston Properties, Inc., its General Partner
November 7, 2023May 10, 2024  
/s/    MICHAEL R. WALSH        
  Michael R. Walsh
  Chief Accounting Officer
(duly authorized officer and principal accounting officer)
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