Tier Reit (TIER) 8-K Results of Operations and Financial Condition

Exhibit 99.1 Supplemental Operating and Financial Data For the Quarter Ended March 31, 2015 Terrace Office Park - Austin, Texas

 Supplemental Operating and Financial Data For the Quarter Ended March 31, 2015 About the Company TIER REIT, Inc. is a self-managed, Dallas, Texas-based real estate investment trust whose goal is to maximize total return to stockholders through the combination of stock appreciation and income derived from a sustainable distribution. TIER’s investment strategy is to acquire, develop, and operate a portfolio of best-in-class office properties in select markets across the U.S. that consistently lead the nation in population and office-using employment growth. As of March 31, 2015, we owned interests in 34 operating office properties, one recently developed non-operating office property and one retail property, located in 17 markets throughout the United States with a total of 14.1 million rentable square feet. Senior Management Scott W. FordhamChief Executive Officer and President Dallas E. LucasChief Financial Officer and Treasurer William J. ReisterChief Investment Officer and Executive Vice President Telisa Webb SchelinChief Legal Officer, Executive Vice President and Secretary James E. SharpChief Accounting Officer and Executive Vice President Where to Get More Information: Kelly SargentVice President - Investor Relations By Phone: (972) 483-2400 By Email: ir@tierreit.com By Mail: 17300 Dallas Parkway, Suite 1010 Dallas, Texas 75248 after August 31, 2015, please contact us at our new address: 5950 Sherry Lane, Suite 700 Dallas, Texas 75225 Website: www.tierreit.com

 Supplemental Operating and Financial Data For the Quarter Ended March 31, 2015 Table of Contents: Overview and Highlights Overview .................................................................................................................1 Financial Highlights .................................................................................................2-3 Consolidated Balance Sheets .................................................................................4 Consolidated Statements of Operations .................................................................5 Consolidated Statements of Discontinued Operations ............................................6 Calculation of FFO, MFFO, and FAD ......................................................................7 Calculation of EBITDA ............................................................................................8 Joint Venture Financial Summary ...........................................................................9 Same Store Analysis ...............................................................................................10 Schedule of Properties Owned ...............................................................................11 Net Operating Income by Market ............................................................................12 Net Asset Value Summary ......................................................................................13 Selected Non-Stabilized Properties ........................................................................14 Significant Tenants ..................................................................................................15 Industry Diversification ............................................................................................16 Leasing Leasing Activity .......................................................................................................17-18 Lease Expirations ...................................................................................................19-20 Occupancy Trends ..................................................................................................21 Capital Expenditures Leasing Cost Analysis .............................................................................................22 Leasing Cost Trend Analysis...................................................................................23 Development, Leasing, and Capital Expenditures Summary ..................................24 Other Information Summary of Land Held for Future Development .....................................................25 Acquisition and Disposition Activities ......................................................................26 Summary of Financing ............................................................................................27 Principal Payments by Year ....................................................................................28 Definitions of Non-GAAP Financial Measures ........................................................29-31 Forward Looking Statements This supplemental operating and financial data report contains forward-looking statements relating to the business and financial outlook of TIER REIT, Inc. that are based on current expectations, estimates, forecasts and projections and are not guarantees of future performance. Statements contained herein may be impacted by a number of risks and uncertainties, including the company’s ability to rent space on favorable terms, its ability to address debt maturities and fund its capital requirements, the value of its assets, its anticipated capital expenditures, and other matters. Actual results may differ materially from those expressed in these forward-looking statements, and you should not place undue reliance on any such statements. A number of important factors could cause actual results to differ materially from the forward-looking statements contained in this document, as well as other factors described in the Risk Factors section of TIER REIT, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2014 and subsequent Quarterly Report on Form 10-Q for the quarter ended March 31, 2015. Forward-looking statements in this document speak only as of the date on which such statements were made, and we undertake no obligation to update any such statements that may become untrue because of subsequent events.

Overview For the Quarter Ended March 31, 2015 Quarterly Highlights and Financial Results • FFO for the first quarter 2015 was $16.9 million, as compared to $14.5 million for the first quarter 2014, an increase of $2.4 million, or 16.6% Same Store Cash NOI for the first quarter 2015 was $31.7 million, as compared to $29.6 million for the first quarter of 2014, an increase of $2.1 million, or 7.1% • Property Results • Occupancy at March 31, 2015, was 88.4%, an increase of 40 basis points from December 31, 2014 • Leased 316,000 square feet - 137,000 square feet of renewals, 68,000 square feet of expansion space, and 111,000 square feet of new leasing Real Estate Activities • Sold One & Two Chestnut Place (Worcester, Massachusetts) for $14.0 million, resulting in $0.1 million in impairment • Sold 250 West Pratt (Baltimore, Maryland) for $63.5 million, resulting in a gain on sale of $8.6 million Capital Market Activities • Paid off $168.3 million of debt secured by ten properties • Entered into two forward starting interest rate swaps for a combined notional value of $275.0 million that mature in May 2022 The swaps will fix 30-day LIBOR at 1.77% in connection with anticipated borrowings from an expansion of our credit facility • On March 25, 2015, we announced that our board of directors authorized the company to pursue a listing of its common stock on a national securities exchange • On June 2, 2015, we filed articles of amendment to effect a 1-for-6 reverse stock split of our existing common stock. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 1

Financial Highlights (in thousands, except per share data, effective rent data, and number of properties) 31-Mar-15 31-Dec-14 30-Sep-14 30-Jun-14 31-Mar-14 Portfolio Summary: (at our ownership %, unless otherwise noted) Total operating office properties Rentable square feet (100%) (operating properties) Rentable square feet (own %) (operating properties) Occupancy % Executed % SF leased Economic % SF leased Average effective rent/square feet 34 13,624 12,487 88% 90% 82% 25.95 37 14,304 13,167 88% 89% 82% 26.02 37 15,291 14,154 87% 89% 82% 26.13 38 15,501 14,364 86% 87% 81% 25.79 38 15,501 14,364 85% 86% 82% 25.84 $ $ $ $ $ Three Months Ended 31-Mar-15 31-Dec-14 30-Sep-14 30-Jun-14 31-Mar-14 Financial Results: Revenue Base rent Free rent NOI Net income (loss) attributable to common stockholders (2) Diluted earnings (loss) per common share (1) (2) FFO attributable to common stockholders Diluted FFO per common share (2) MFFO attributable to common stockholders Diluted MFFO per common share (2) FAD attributable to common stockholders FAD per common share (2) EBITDA Weighted average common shares outstanding - basic (2) Weighted average common shares outstanding - diluted (2) $ $ $ $ $ $ $ $ $ $ $ $ $ 74,047 55,674 (5,118) 36,113 (5,892) (0.12) 16,904 0.34 12,810 0.26 1,054 0.02 34,738 49,891 50,066 $ $ $ $ $ $ $ $ $ $ $ $ $ 72,870 53,522 (3,705) 37,378 45,806 0.92 3,107 0.06 13,407 0.27 (2,759) (0.06) 40,941 49,877 49,996 $ $ $ $ $ $ $ $ $ $ $ $ $ 70,456 51,898 (2,264) 35,518 (16,355) (0.33) 17,071 0.34 16,785 0.34 1,958 0.04 40,026 49,877 49,996 $ $ $ $ $ $ $ $ $ $ $ $ $ 69,518 51,068 (2,499) 34,684 (17,279) (0.35) 19,066 0.38 16,214 0.32 1,505 0.03 41,036 49,877 49,937 $ $ $ $ $ $ $ $ $ $ $ $ $ 68,298 50,754 (2,554) 31,768 (29,614) (0.59) 14,470 0.29 11,459 0.23 (5,497) (0.11) 36,305 49,871 49,990 Selected Additional Trend Information: Renewal % based on square feet Distributions declared on common shares Annualized distribution yield 74% — 0.0% 89% — 0.0% 75% — 0.0% 49% — 0.0% 62% — 0.0% $ $ $ $ $ (1) In periods of net loss from continuing operations there are no dilutive securities and diluted earnings (loss) per common share is calculated using weighted average common shares outstanding - basic as the denominator. (2) All periods presented have been adjusted to reflect the reverse stock split that occurred on June 2, 2015. Occupancy % represents the total square footage subject to commenced leases as of the reporting date as a percentage of the total rentable square feet (at our ownership interest). Executed % SF leased represents the total square footage subject to commenced leases plus the square footage for currently vacant space that is subject to executed leases that have not commenced as of the reporting date as a percentage of the total rentable square feet (at our ownership interest). Economic % SF leased represents the total square footage subject to commenced leases as of the reporting date adjusted to exclude the square footage associated with leases receiving rental abatements as a percentage of the total rentable square feet (at our ownership interest). Average effective rent represents 12 times the sum of the monthly contractual amounts for base rent and the pro rata budgeted operating expense reimbursements, as of period end, related to leases in place as of period end, as reduced for free rent and excluding any scheduled future rent increases, as adjusted for our ownership interest. This section includes non-GAAP financial measures, which are accompanied by what we consider the most directly comparable financial measures calculated and presented in accordance with GAAP. Quantitative reconciliations of the differences between the non-GAAP financial measures presented and the most directly comparable GAAP financial measures are shown on pages 7-8. A description of the non-GAAP financial measures we present and a statement of the reasons why management believes the non-GAAP measures provide useful information to investors about the Company’s financial condition and results of operations can be found on pages 29-31. TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 2

Financial Highlights (continued) (in thousands) 31-Mar-15 31-Dec-14 30-Sep-14 30-Jun-14 31-Mar-14 Selected Balance Sheet Items: Total book value of real estate (1) $ 1,609,953 $ 1,768,766 $ 2,008,569 $ 2,029,715 $ 2,030,540 Cash and cash equivalents $ 5,764 $ 31,442 $ 923 $ 1,183 $ 31,260 Unconsolidated cash and cash equivalents (at ownership %) $ 2,480 $ 3,355 $ 3,621 $ 3,127 $ 2,752 Restricted cash $ 32,761 $ 35,324 $ 49,654 $ 47,404 $ 51,129 Total assets $ 2,116,165 $ 2,211,183 $ 2,340,502 $ 2,363,565 $ 2,401,199 Mortgage notes payable (1) $ 903,475 $ 1,069,085 $ 1,445,017 $ 1,470,951 $ 1,494,281 Revolving credit facility and term loan $ 221,000 $ 125,000 $ 20,000 $ — $ — Notes payable classified as held for sale $ 96,824 $ 97,257 $ — $ — $ — Unconsolidated debt (at ownership %) $ 59,870 $ 60,253 $ 60,625 $ 60,988 $ 61,346 Total liabilities $ 1,338,198 $ 1,423,023 $ 1,599,724 $ 1,606,773 $ 1,627,418 Common stock outstanding at period end (5) 49,901 49,877 49,877 49,877 49,877 OP units and vested restricted stock units outstanding at period end (5) 78 78 78 72 72 Restricted stock outstanding at period end (5) 192 119 119 119 128 Capitalization: Market capitalization (2) $ 1,343,444 $ 1,342,808 $ 1,258,883 $ 1,258,726 $ 1,258,726 Total debt (3) $ 1,281,169 $ 1,351,595 $ 1,525,642 $ 1,531,939 $ 1,555,627 Net debt (4) $ 1,272,925 $ 1,316,798 $ 1,521,098 $ 1,527,629 $ 1,521,615 Total capitalization $ 2,624,613 $ 2,694,403 $ 2,784,525 $ 2,790,665 $ 2,814,353 Net debt/total capitalization 48% 49% 55% 55% 54% Three Months Ended 31-Mar-15 31-Dec-14 30-Sep-14 30-Jun-14 31-Mar-14 Ratios: NOI margin % 48.8% 51.3% 50.4% 49.9% 46.5% Fixed charge coverage 1.65 1.53 1.46 1.50 1.34 Interest coverage 1.93 1.89 1.79 1.83 1.64 Net debt/annualized estimated full period EBITDA for properties owned at period end 9.57x 8.51x 9.58x 9.31x 10.49x Net debt/normalized annualized estimated full period EBITDA for properties owned at period end 8.94x 8.45x 9.57x 9.30x 10.44x (1) Excludes book value of real estate and notes payable classified as held for sale. (2) Market capitalization is equal to outstanding shares (common stock, OP units, and vested restricted stock units, as if converted) times our estimated stock value of $25.20 per share through October 2014 or $26.88 per share beginning in November 2014, as reported in Quarterly Reports on Form 10-Q filed on November 5, 2013, and November 3, 2014, respectively and reflect the reverse stock split that occurred on June 2, 2015. (3) Includes book value of mortgage notes payable, the revolving credit facility and term loan, notes payable classified as held for sale, and TIER REIT’s ownership share of unconsolidated debt. (4) Total debt less cash and cash equivalents. (5) All periods presented have been adjusted to reflect the reverse stock split that occurred on June 2, 2015. TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 3

Consolidated Balance Sheets (in thousands, except share and per share data) 31-Mar-15 31-Dec-14 30-Sep-14 30-Jun-14 31-Mar-14 Assets Real estate Land Buildings and improvements, net Real estate under development Total real estate Cash and cash equivalents Restricted cash Accounts receivable, net Prepaid expenses and other assets Investments in unconsolidated entities Deferred financing fees, net Acquired above-market leases, net Other lease intangibles, net Other intangible assets, net Assets associated with real estate held for sale Total assets $ 249,030 1,360,923 — $ 286,430 1,482,336 — $ 318,058 1,690,511 — $ 316,897 1,644,088 68,730 $ 316,941 1,653,436 60,163 1,609,953 5,764 32,761 75,466 7,222 39,422 10,690 163 77,480 2,114 255,130 1,768,766 31,442 35,324 83,380 7,129 39,885 10,783 2,019 92,671 2,144 137,640 2,008,569 923 49,654 100,601 8,033 41,420 7,130 4,442 117,556 2,174 — 2,029,715 1,183 47,404 99,272 7,234 41,443 8,101 5,229 121,781 2,203 — 2,030,540 31,260 51,129 98,346 7,211 41,371 9,043 5,724 124,342 2,233 — $ 2,116,165 $ 2,211,183 $ 2,340,502 $ 2,363,565 $ 2,401,199 Liabilities and equity Liabilities: Notes payable Term loan Revolving credit facility Unamortized mark to market premium (discount) Total notes payable Accounts payable Payables to related parties Accrued liabilities Acquired below-market leases, net Deferred tax liabilities Other liabilities Obligations associated with real estate held for sale Total liabilities Commitments and contingencies Series A Convertible Preferred Stock Equity: Preferred stock Convertible stock Common stock, $.0001 par value per share, 382,499,000 shares authorized (1) Additional paid-in capital (1) Cumulative distributions and net loss attributable to common stockholders Accumulated other comprehensive loss Stockholders’ equity Noncontrolling interests Total equity Total liabilities and equity $ 903,688 125,000 96,000 (213) $ 1,069,323 125,000 — (238) $ 1,445,018 — 20,000 (1) $ 1,470,974 — — (23) $ 1,494,324 — — (43) 1,124,475 1,194,085 1,465,017 1,470,951 1,494,281 1,118 2,257 65,713 14,381 2,551 23,246 104,457 2,790 2,041 77,375 16,984 2,880 18,525 108,343 5,543 1,820 86,174 19,618 760 20,792 — 6,549 1,650 84,696 21,318 923 20,686 — 5,828 1,675 82,034 22,921 1,187 19,492 — 1,338,198 1,423,023 1,599,724 1,606,773 1,627,418 4,626 4,626 2,700 2,700 2,700 — — — — — — — — — — 5 2,646,147 5 2,645,927 5 2,647,535 5 2,647,215 5 2,646,944 (1,868,447) (5,336) (1,862,555) (788) (1,910,287) — (1,893,932) — (1,876,653) — 772,369 782,589 737,253 753,288 770,296 972 945 825 804 785 773,341 783,534 738,078 754,092 771,081 $ 2,116,165 $ 2,211,183 $ 2,340,502 $ 2,363,565 $ 2,401,199 Common stock, number of shares issued and outstanding (1) 49,901,013 49,877,350 49,877,350 49,877,350 49,877,350 (1) All periods have been adjusted to reflect the reverse stock split that occurred on June 2, 2015. TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 4

Consolidated Statements of Operations (in thousands, except share and per share amounts) Three Months Ended 31-Mar-15 31-Dec-14 30-Sep-14 30-Jun-14 31-Mar-14 Revenue Rental income Straight-line rent revenue adjustment Lease incentives Above-and below-market rent amortization Lease termination fees Total revenue Expenses Property related expenses Real estate taxes Property management fees Total property operating expenses Interest expense Amortization of deferred financing costs Amortization of mark to market Total interest expense General and administrative Amortization of restricted shares and units Straight-line rent expense adjustment Acquisition expense Asset impairment losses Real estate depreciation and amortization Total expenses Interest and other income Loss on early extinguishment of debt Loss from continuing operations before income taxes and equity in operations of investments Benefit (provision) for income taxes Equity in operations of investments Loss from continuing operations Discontinued operations: Income (loss) from discontinued operations Gain on sale of discontinued operations Income (loss) from discontinued operations Net income (loss) Noncontrolling interests - continuing operations Noncontrolling interests - discontinued operations Accretion of Series A Convertible Preferred Stock Net income (loss) attributable to common stockholders $ 69,773 2,350 192 1,187 545 $ 68,093 2,637 528 1,070 542 $ 67,995 817 77 648 919 $ 66,477 1,312 151 1,002 576 $ 65,397 1,698 38 1,045 120 74,047 72,870 70,456 69,518 68,298 24,244 11,419 2,271 23,596 9,757 2,139 21,718 11,051 2,169 22,711 10,055 2,068 24,709 9,758 2,063 37,934 35,492 34,938 34,834 36,530 14,889 877 21 15,618 750 131 15,257 623 68 15,364 634 67 15,343 439 65 15,787 16,499 15,948 16,065 15,847 5,884 535 (7) 2 132 30,022 4,799 363 (6) 86 4,940 31,016 4,147 369 (5) 4 — 29,232 4,300 311 (5) — — 28,561 4,346 354 (5) — — 28,161 90,289 93,189 84,633 84,066 85,233 146 (36) 82 (426) 89 — 97 — 249 — (16,132) 76 243 (20,663) 73 522 (14,088) (36) 431 (14,451) 59 795 (16,686) (68) 88 (15,813) (20,068) (13,693) (13,597) (16,666) 1,305 8,606 (18,318) 86,195 (6,713) 4,026 (3,703) — (12,991) — 9,911 67,877 (2,687) (3,703) (12,991) (5,902) 27 (17) — 47,809 32 (109) (1,926) (16,380) 32 (7) — (17,300) 20 1 — (29,657) 24 19 — $ (5,892) $ 45,806 $ (16,355) $ (17,279) $ (29,614) Basic and diluted weighted average common shares outstanding (1) Basic and diluted earnings (loss) per common share: Continuing operations (1) Discontinued operations (1) Basic and diluted earnings (loss) per common share (1) Net income (loss) attributable to common stockholders: Continuing operations (1) Discontinued operations (1) Net income (loss) attributable to common stockholders (2) 49,891,436 49,877,350 49,877,350 49,877,350 49,871,464 $ (0.32) 0.20 $ (0.44) 1.36 $ (0.27) (0.06) $ (0.27) (0.08) $ (0.33) (0.26) $ (0.12) $ 0.92 $ (0.33) $ (0.35) $ (0.59) $ (15,786) 9,894 $ (21,962) 67,768 $ (13,661) (2,694) $ (13,577) (3,702) $ (16,642) (12,972) $ (5,892) $ 45,806 $ (16,355) $ (17,279) $ (29,614) (1) All periods presented have been adjusted to reflect the reverse stock split that occurred on June 2, 2015. TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 5

Consolidated Statements of Discontinued Operations (in thousands) Three Months Ended 31-Mar-15 31-Dec-14 30-Sep-14 30-Jun-14 31-Mar-14 Revenue Rental income Straight-line rent revenue adjustment Lease incentives Above-and below-market rent amortization Lease termination fees Total revenue $ 6,035 428 — — — $ 13,238 435 (102) 73 149 $ 14,808 (451) (109) 79 116 $ 15,282 55 (102) 107 164 $ 15,433 (136) (105) 109 75 6,463 13,793 14,443 15,506 15,376 Expenses Property related expenses Real estate taxes Property management fees Total property operating expenses 2,636 941 168 4,671 2,521 368 5,041 2,392 434 4,405 2,514 458 5,168 2,798 478 3,745 7,560 7,867 7,377 8,444 Interest expense Amortization of deferred financing costs Amortization of mark to market Total interest expense 1,415 45 (49) 4,134 107 (49) 5,231 144 (48) 5,192 125 (47) 5,155 125 (46) 1,411 4,192 5,327 5,270 5,234 Asset impairment losses Real estate depreciation and amortization Total expenses — — — 6,165 — 7,013 — 6,559 8,225 6,461 5,156 17,917 20,207 19,206 28,364 Interest and other income (expense) Loss on early extinguishment of debt Income (loss) before gain on sale of discontinued operations Gain on sale of discontinued operations Income (loss) from discontinued operations (2) — (4) (14,190) (3) (946) (3) — (3) — 1,305 8,606 (18,318) 86,195 (6,713) 4,026 (3,703) — (12,991) — $ 9,911 $ 67,877 $ (2,687) $ (3,703) $ (12,991) Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 6

Calculation of FFO, MFFO, and FAD (in thousands, except per share data) Three Months Ended Funds from operations (FFO) 31-Mar-15 31-Dec-14 30-Sep-14 30-Jun-14 31-Mar-14 Net income (loss) Net (income) loss attributable to noncontrolling interests Accretion of Series A Convertible Preferred Stock Adjustments (1): Real estate depreciation and amortization - consolidated Real estate depreciation and amortization - unconsolidated joint ventures Impairment of depreciable real estate assets Gain on sale of depreciable real estate Noncontrolling interests (OP units & vested restricted stock units) share of above adjustments FFO attributable to common stockholders $ (5,902) 10 — $ 47,809 (77) (1,926) $ (16,380) 25 — $ (17,300) 21 — $ (29,657) 43 — 30,022 37,181 36,245 35,120 34,622 1,287 132 (8,606) 1,307 4,940 (86,195) 1,275 — (4,026) 1,278 — — 1,301 8,225 — (39) 68 (68) (53) (64) $ 16,904 $ 3,107 $ 17,071 $ 19,066 $ 14,470 Modified funds from operations (MFFO) FFO attributable to common stockholders Adjustments (1): Acquisition expenses Straight-line rent adjustments Above-and below-market rent amortization Loss on early extinguishment of debt Noncontrolling interests (OP units & vested restricted stock units) share of above adjustments MFFO attributable to common stockholders $ 16,904 $ 3,107 $ 17,071 $ 19,066 $ 14,470 2 (2,850) (1,289) 36 86 (3,141) (1,244) 14,616 4 (411) (827) 946 — (1,646) (1,210) — — (1,765) (1,250) — 7 (17) 2 4 4 $ 12,810 $ 13,407 $ 16,785 $ 16,214 $ 11,459 Funds available for distribution (FAD) MFFO attributable to common stockholders Adjustments (1): Recurring capital expenditures Amortization of deferred financing fees and mark to market Amortization of restricted shares and units Noncontrolling interests (OP units & vested restricted stock units) share of above adjustments Accretion of Series A Convertible Preferred Stock FAD attributable to common stockholders $ 12,810 $ 13,407 $ 16,785 $ 16,214 $ 11,459 (13,247) 936 535 (19,468) 982 363 (16,056) 831 369 (15,864) 823 311 (17,963) 628 354 20 — 31 1,926 29 — 21 — 25 — $ 1,054 $ (2,759) $ 1,958 $ 1,505 $ (5,497) Weighted average common shares outstanding - basic (2) Weighted average common shares outstanding - diluted (2) 49,891 50,066 49,877 49,996 49,877 49,996 49,877 49,937 49,871 49,990 Diluted FFO per common share (2) Diluted MFFO per common share (2) FAD per common share (2) $ $ $ 0.34 0.26 0.02 $ $ $ 0.06 0.27 (0.06) $ $ $ 0.34 0.34 0.04 $ $ $ 0.38 0.32 0.03 $ $ $ 0.29 0.23 (0.11) (1) Adjustments represent our pro rata share of consolidated and unconsolidated amounts, including discontinued operations. (2) All periods presented have been adjusted to reflect the reverse stock split that occurred on June 2, 2015. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 7

Calculation of EBITDA (in thousands, except fixed charge coverage) Three Months Ended 31-Mar-15 31-Dec-14 30-Sep-14 30-Jun-14 31-Mar-14 Net income (loss) attributable to common stockholders $ (5,892) $ 45,806 $ (16,355) $ (17,279) $ (29,614) Adjustments: Noncontrolling interests (OP units & vested restricted stock units) Accretion of Series A Convertible Preferred Stock (10) — 77 1,926 (36) — (25) — (43) — Interest expense - consolidated (including discontinued operations) Interest expense - unconsolidated joint ventures Amortization of deferred financing costs - consolidated (including discontinued operations) Amortization of deferred financing costs - unconsolidated joint ventures Mark to market - consolidated (including discontinued operations) Mark to market - unconsolidated joint ventures Total interest expense 16,304 615 19,752 631 20,488 635 20,933 633 20,121 630 922 857 767 382 941 13 (28) 17 13 82 18 13 20 19 12 20 20 13 19 20 17,843 21,353 21,942 22,000 21,744 Tax (benefit) provision - consolidated (including discontinued operations) Tax (benefit) provision - unconsolidated joint ventures (76) 2 (73) 3 36 (1) (59) 1 68 2 Depreciation and amortization - consolidated (including discontinued operations) Depreciation and amortization - unconsolidated joint ventures 30,022 1,287 37,181 1,307 36,245 1,275 35,120 1,278 34,622 1,301 Impairment losses Gain on sale of real estate Loss on early extinguishment of debt EBITDA 132 (8,606) 36 4,940 (86,195) 14,616 — (4,026) 946 — — — 8,225 — — 34,738 40,941 40,026 41,036 36,305 Adjustments: EBITDA from properties disposed before period end Full quarter adjustment for acquired properties (1,488) — (2,974) 723 (336) — (16) — (36) — Estimated full period EBITDA from properties owned at period end 33,250 38,690 39,690 41,020 36,269 Adjustments: Costs incurred in connection with listing activities Non-cash write-off of tenant receivables Normalized estimated full period EBITDA from properties owned at period end 503 1,829 104 163 — 64 — 54 — 175 $ 35,582 $ 38,957 $ 39,754 $ 41,074 $ 36,444 Fixed charges Interest expense Capitalized interest incurred (1) Interest expense Principal payments (excludes debt payoff) Fixed charges $ 17,843 176 $ 21,353 338 $ 21,942 428 $ 22,000 427 $ 21,744 430 18,019 3,059 21,691 5,038 22,370 5,026 22,427 4,867 22,174 4,889 $ 21,078 $ 26,729 $ 27,396 $ 27,294 $ 27,063 Interest coverage Fixed charge coverage 1.93 1.65 1.89 1.53 1.79 1.46 1.83 1.50 1.64 1.34 (1) Excludes capitalized interest funded from Two BriarLake Plaza construction loan. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 8

Joint Venture Financial Summary As of and for the Quarter Ended March 31, 2015 (dollars in thousands) Unconsolidated Joint Ventures at TIER REIT Ownership Share Paces West Wanamaker Building Ownership % during the period Ownership % at period end Results of Operations 10.00% 10.00% 60.00% 60.00% Total Rental income Straight-line rent revenue adjustment Above-and below-market rent amortization Other income Total revenue $ 280 39 — 1 $ 3,622 26 102 25 $ 3,902 65 102 26 320 3,775 4,095 Property related expenses Real estate taxes Property management fees NOI 108 23 7 1,390 386 104 1,498 409 111 182 1,895 2,077 Interest expense Amortization of deferred financing costs Amortization of mark to market Real estate depreciation and amortization Interest income and other expense Provision for income taxes Net income (loss) 89 3 — 127 — — 526 22 17 1,160 5 2 615 25 17 1,287 5 2 (37) 163 126 Intercompany eliminations Eliminate amortization of deferred financing costs Eliminate property management fees Adjusted net income (loss) Adjustments: Real estate depreciation and amortization Funds from operations Adjustments: Straight-line rent revenue adjustment Above-and below-market rent amortization Modified funds from operations — 1 12 104 12 105 (36) 279 243 127 1,160 1,287 91 1,439 1,530 (39) - (26) (102) (65) (102) $ 52 $ 1,311 $ 1,363 Balance Sheet Information Real estate book value Accumulated depreciation Real estate book value after depreciation $ 6,489 (576) $ 100,467 (21,743) $ 106,956 (22,319) $ 5,913 $ 78,724 $ 84,637 Cash and cash equivalents Assets Debt (1) Equity $ $ $ $ 70 8,074 6,500 1,240 $ $ $ $ 2,410 99,737 52,141 38,182 $ $ $ $ 2,480 107,811 58,641 39,422 (1) All joint venture debt is non-recourse. Debt is shown net of mark to market adjustments. TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 9

Same Store Analysis (in thousands, except property count) Three Months Ended Favorable/ (Unfavorable) % Change Same Store GAAP NOI: Revenues: Total revenue Less: Lease termination fees 31-Mar-15 31-Mar-14 $ 69,990 545 $ 67,065 120 $ 2,925 425 69,445 66,945 2,500 3.7% Expenses: Property operating expenses (less tenant improvement demolition costs) Real estate taxes Property management fees Property expenses Same Store GAAP NOI Same Store Cash NOI: Less: Straight-line rent adjustments Above-and below-market rent amortization Same Store Cash NOI 22,687 10,605 2,185 23,309 9,585 2,034 622 (1,020) (151) 2.7% -10.6% -7.4% -1.6% 6.1% 35,477 34,928 (549) $ 33,968 $ 32,017 $ 1,951 1,297 1,008 1,439 1,018 (142) (10) $ 31,663 $ 29,560 $ 2,103 7.1% Occupancy % at period end (% owned) Consolidated operating properties Rentable square feet (% owned) Same Store GAAP NOI and Same Store Cash NOI reconciliation: Net loss Adjustments: Interest expense Asset impairment losses Tenant improvement demolition costs General and administrative Amortization of restricted shares and units Straight-line rent expense adjustment Acquisition expense Real estate depreciation and amortization Interest and other income Loss on early extinguishment of debt Provision (benefit) for income taxes Equity in operations of investments (Income) loss from discontinued operations Gain on sale of assets Net operating income (NOI) Net operating income of non same store properties Lease termination fees Same Store GAAP NOI Straight-line rent revenue adjustment Above-and below-market rent amortization Same Store Cash NOI $ (5,902) $ (29,657) 15,787 132 52 5,884 535 (7) 2 30,022 (146) 36 (76) (243) (1,305) (8,606) 15,847 — 746 4,346 354 (5) — 28,161 (249) — 68 (88) 12,991 — 36,165 (1,652) (545) 32,514 (377) (120) 33,968 (1,297) (1,008) 32,017 (1,439) (1,018) $ 31,663 $ 29,560 Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 10 29 10,552 85.5% 88.9%

Schedule of Properties Owned at March 31, 2015 (in thousands, except average effective rent $/RSF) Average Effective Rent $/RSF % Average Effective Rent (own %) Rentable SF (100%) Rentable SF (own %) Average Effective Rent Occupancy % % of NRA (own %) Property (% owned, if not 100%) Location Terrace Office Park Austin 5950 Sherry Lane Burnett Plaza Centreport Office Center Dallas/Fort Worth Loop Central One & Two Eldridge Place One BriarLake Plaza Three Eldridge Place Houston Paces West (10%) Atlanta Austin, TX 619 619 92.9% $ 20,261 $ 35.25 5.0% 7.1% 619 619 92.9% 20,261 $ 35.25 5.0% 7.1% Dallas, TX Fort Worth, TX Fort Worth, TX 197 1,025 133 197 1,025 133 85.3% 80.8% 100.0% 5,075 18,518 1,715 $ $ $ 30.27 22.34 12.87 1.6% 8.2% 1.1% 1.8% 6.5% 0.6% 1,355 1,355 83.3% 25,308 $ 22.40 10.9% 8.8% Houston, TX Houston, TX Houston, TX Houston, TX 575 519 502 305 575 519 502 305 93.7% 99.2% 97.2% 100.0% 10,296 16,760 19,915 12,302 $ $ $ $ 19.11 32.52 40.78 40.22 4.6% 4.2% 4.0% 2.4% 3.6% 5.8% 7.0% 4.3% 1,901 1,901 97.2% 59,273 $ 32.07 15.2% 20.7% Atlanta, GA 646 65 83.1% 1,057 $ 19.61 0.5% 0.4% 646 65 83.1% 1,057 $ 19.61 0.5% 0.4% Bank of America Plaza Charlotte Charlotte, NC 891 891 88.6% 18,776 $ 23.79 7.1% 6.6% 891 891 88.6% 18,776 $ 23.79 7.1% 6.6% Buena Vista Plaza Los Angeles Burbank, CA 115 115 100.0% 4,347 $ 37.76 0.9% 1.5% 115 115 100.0% 4,347 $ 37.76 0.9% 1.5% Forum Office Park Hurstbourne Place One Oxmoor Place Hurstbourne Park Steeplechase Place Lakeview Hunnington Louisville Plaza at MetroCenter Nashville Louisville, KY Louisville, KY Louisville, KY Louisville, KY Louisville, KY Louisville, KY Louisville, KY 328 235 135 104 77 76 62 328 235 135 104 77 76 62 98.2% 80.4% 95.6% 100.0% 90.9% 94.7% 56.5% 5,412 3,501 2,857 2,177 1,173 1,396 604 $ $ $ $ $ $ $ 16.81 18.50 22.11 20.86 16.77 19.33 17.11 2.6% 1.9% 1.1% 0.8% 0.6% 0.6% 0.5% 1.9% 1.2% 1.0% 0.8% 0.4% 0.5% 0.2% 1,017 1,017 90.6% 17,120 $ 18.56 8.1% 6.0% Nashville, TN 361 361 91.4% 5,567 $ 16.86 2.9% 1.9% 361 361 91.4% 5,567 $ 16.86 2.9% 1.9% 5104 Eisenhower Blvd. Tampa 801 Thompson 1325 G Street Colorado Building Washington, D.C. Operating office properties in strategic markets Tampa, FL 130 130 100.0% 1,902 $ 14.64 1.0% 0.7% 130 130 100.0% 1,902 $ 14.64 1.0% 0.7% Rockville, MD Washington, D.C. Washington, D.C. 51 307 128 51 307 128 100.0% 74.6% 89.8% 1,641 10,206 4,351 $ $ $ 32.23 44.49 37.71 0.4% 2.5% 1.0% 0.6% 3.6% 1.5% 486 486 81.3% 16,198 $ 40.94 3.9% 5.7% 7,521 6,940 90.6% 169,809 $ 27.00 55.6% 59.3% 500 East Pratt Woodcrest Corporate Center 111 Woodcrest FOUR40 Fifth Third Center (1) Fifth Third Center (1) Wanamaker Building United Plaza (1) Three Parkway 1650 Arch Street (1) Lawson Commons Other operating office properties Total operating office properties Non-operating retail property Baltimore, MD Cherry Hill, NJ Cherry Hill, NJ Chicago, IL Cleveland, OH Columbus, OH Philadelphia, PA Philadelphia, PA Philadelphia, PA Philadelphia, PA St. Paul, MN 280 333 53 1,041 508 331 1,390 617 561 553 436 280 333 53 1,041 508 331 834 617 561 553 436 98.2% 93.1% 84.9% 67.5% 77.2% 74.3% 95.7% 87.4% 94.5% 94.4% 89.2% 9,113 8,137 925 20,035 8,571 7,255 13,633 15,244 13,421 10,962 9,392 $ $ $ $ $ $ $ $ $ $ $ 33.14 26.26 20.55 28.49 21.89 29.44 17.08 28.29 25.31 20.98 24.13 2.2% 2.7% 0.4% 8.3% 4.1% 2.7% 6.7% 4.9% 4.5% 4.4% 3.5% 3.2% 2.8% 0.3% 7.0% 3.0% 2.5% 4.8% 5.3% 4.7% 3.8% 3.3% 6,103 5,547 85.6% 116,688 $ 24.57 44.4% 40.7% 13,624 12,487 88.4% $ 286,497 $ 25.95 100.0% 100.0% Hurstbourne Plaza (2) Office development property (3) Louisville, KY 94 94 43.1% Two BriarLake Plaza Total Properties Houston, TX 334 334 56.1% 14,052 12,915 (1) (2) (3) Property held for sale at March 31, 2015. Hurstbourne Plaza is a retail property planned for redevelopment within the Hurstbourne Business Park. Development properties are classified as operating upon the sooner to occur of 90% commenced leasing or one year after major construction is completed. TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 11

Net Operating Income by Market • • • • • Dallas/Fort Worth Atlanta Los Angeles Nashville Washington, D.C. 1.6% 1.8% Represents TIER REIT's % ownership of NOI during the current quarter from operating properties owned at period end by market as a % of TIER REIT's % ownership of total NOI during the current quarter from operating properties owned at period end. TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 12 • Austin • Houston • Charlotte • Louisville • Tampa • Other 1.9%

Components of Net Asset Value (in thousands) Annualized Three Months 31-Mar-15 Revenue (1) Less: GAAP rent adjustments Lease termination fees $ 322,040 (16,628) (2,180) 303,232 (166,716) Property operating expenses (1) Add: Costs attributable to tenant improvement demolition Property management fees (2) Adjusted cash NOI Less: Adjusted cash NOI from properties sold prior to period end Adjusted cash NOI from non-stabilized properties (3) Add: Adjusted cash NOI from unconsolidated real estate at ownership share Total adjusted cash NOI at ownership share (4) 507 8,600 145,623 (2,838) (26,529) 7,772 $ 124,028 31-Mar-15 Other non-stabilized real estate properties Value of non-stabilized properties as determined by third-party on October 30, 2014 (3) Purchase price of non-stabilized property acquired December 19, 2014 (5950 Sherry Lane) Total other real estate properties Other tangible assets Cash and cash equivalents Restricted cash Accounts receivable (excluding $66.8 million of straight-line rent receivable) Prepaid expenses Other tangible assets held for sale (included in assets associated with real estate held for sale) Ownership share of other tangible assets in unconsolidated joint ventures Total other tangible assets Liabilities Notes payable Other notes payable (included in obligations associated with real estate held for sale) Credit facility Other liabilities Other liabilities (included in obligations associated with real estate held for sale) Ownership share of other liabilities in unconsolidated joint ventures Ownership share of unconsolidated debt Total liabilities 718,700 62,578 $ 781,278 $ 5,764 32,761 8,707 7,222 1,862 8,334 $ 64,650 $ 903,688 96,553 221,000 94,886 5,446 2,413 59,984 $ 1,383,970 Total common shares, OP units, and vested restricted stock units outstanding (5) 50,171 (1) Includes consolidated operations (2) Represents adjustment made for third-party property management services which will be internalized beginning July 1, 2015 (3) Non-stabilized properties include: Economic % SF Leased 31-Mar-15 1325 G Street Colorado Building Hurstbourne Plaza 5104 Eisenhower Blvd. (a) 5950 Sherry Lane Two BriarLake Plaza FOUR40 Burnett Plaza 59% 65% 44% 57% 64% 32% 54% 73% (a) Free rent period on 43% of space at 5104 Eisenhower Blvd. expires in 2015. (4) Includes adjusted cash NOI of Plaza at MetroCenter and Buena Vista Plaza, which are currently stabilized but will become economically non-stabilized in 2015 due to large lease renewals with associated rent abatements. (5) Reflects the reverse stock split that occurred on June 2, 2015. TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 13

Selected Non-Stabilized Properties Property Name Market Sub-Market Estimated Cash NOI at Stabilization (in thousands) Estimated Stabilization date Rentable Square feet Occupancy % Property Type Description Acquired in December 2014, 5950 Sherry Lane Office 197,000 85% $4,106 2016 following the move out of an approximate 40,000 square foot Dallas tenant. Budgeted $1.6 million in capital improvements and repair and maintenance projects. Preston Center Office Development 334,000 56% $8,246 2016 Property operates as a multi-Two BriarLake Plaza campus facility with our One BriarLake Plaza property. Major construction was completed in the third quarter of 2014. Houston Westchase Completed $5.8 million lobby FOUR40 Office 1,041,000 68% $16,271 2017 renovation in the third quarter of 2014. Construction of a $10.6 Chicago million tenant amenity floor including wi-fi lounge, conference Central Loop center, and café is in process with anticipated completion in the third quarter of 2015. Two tenants moved out due to Burnett Plaza Office 1,025,000 81% $13,506 2017 relocation to an owned facility (approximately 80,000 square feet in Q3 2013) and downsizing Dallas/Fort Worth (approximately 80,000 square feet Fort Worth CBD in Q2 2014). The property received BOMA’s 2014 International Building of the Year (TOBY) for properties in excess of one million square feet. Budgeted $2.2 million in strategic capital improvements. Anticipate 15 year renewal of Plaza at MetroCenter 100,000 square feet (43,000 square feet downsizing) by the major tenant in 2015 and 2016. Upon completion of tenant renovations in late 2016, tenant will receive six months of free rent. Office 361,000 91% $3,032 2017 Nashville MetroCenter Completed ten year renewal of 113,000 square feet by the major tenant in the second quarter of 2015 with free rent for eleven months, beginning in April 2015, before returning to stabilized economic occupancy. Buena Vista Plaza Office 115,000 100% $3,056 2016 Burbank Burbank media district Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 14

Significant Tenants March 31, 2015 (In thousands) Properties in Strategic Markets Percentage of Annualized Gross Rental Revenues Weighted Annualized Gross Rental Revenues Percentage of Square Feet Leased Average Remaining Term (Years) Square Feet Leased Moody’s / S&P Credit Rating Tenant Oil & gas company Financial services company GSA Oil & gas company McDermott, Inc. Oil & gas company Disney Enterprises Inc. Financial services company Law firm E. R. Squibb and Sons, LLC Insurance company Law firm Oil & gas company Healthcare company Oil & gas company $ 15,254 10,682 10,521 8,347 6,051 4,967 4,147 4,141 3,636 3,350 3,273 3,100 2,872 2,759 2,606 8% 6% 6% 5% 3% 3% 2% 2% 2% 2% 2% 2% 2% 2% 1% 389 476 356 210 190 219 110 156 93 130 140 107 117 148 63 6% 8% 6% 3% 3% 3% 2% 2% 1% 2% 2% 2% 2% 2% 1% 3.2 3.7 3.1 9.6 5.8 5.1 0.8 3.9 6.8 9.3 13.3 7.5 7.3 10.1 2.2 A2 / A Baa1 / A-U.S. Government Baa1 / A-Ba3 / B+ NR A2 / A NR NR A2 / A+ A1 / A+ NR D Baa3 / BBB+ NR Total of largest 15 tenants at properties in strategic markets Total all tenants at properties in strategic markets $ 85,706 47% 2,904 46% 5.5 $ 182,039 6,285 4.9 Total Portfolio Percentage of Annualized Gross Rental Revenues Weighted Annualized Gross Rental Revenues Percentage of Square Feet Leased Average Remaining Term (Years) Square Feet Leased Moody’s / S&P Credit Rating Tenant GSA Oil & gas company Financial services company Oil & gas company Law firm Financial services company Software company McDermott, Inc. Oil & gas company Technology company Collegiate Institution Disney Enterprises Inc. Financial services company Enclara Pharmacia, Inc. Law firm Total of largest 15 tenants Total all tenants $ 21,891 15,254 10,682 8,347 7,697 6,418 6,254 6,051 4,967 4,822 4,519 4,147 4,141 4,007 3,636 7% 5% 4% 3% 3% 2% 2% 2% 2% 2% 1% 1% 1% 1% 1% 879 389 476 210 257 229 240 190 219 180 184 110 156 141 93 8% 4% 4% 2% 2% 2% 2% 2% 2% 2% 2% 1% 1% 1% 1% 3.8 3.2 3.7 9.6 4.4 4.1 5.1 5.8 5.1 0.4 7.9 0.8 3.9 0.2 6.8 4.2 5.1 U.S. Government A2 / A Baa1 / A-Baa1 / A-NR A3 / A-B3 / B Ba3 / B+ NR Baa2 / BBB NR A2 / A NR NR NR $ 112,833 37% 3,953 36% $ 303,563 11,034 Notes: The above tables set forth the company’s 15 largest tenants including subsidiaries for the operating properties as of the date noted above, based upon annualized gross rents plus estimated operating cost recoveries in place at the end of the above noted period. As annualized rental revenue is not derived from the historical GAAP results, historical results may differ from those set forth above. Amounts reflect TIER REIT’s ownership %. TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 15

Industry Diversification (by square foot) As of March 31, 2015 Notes: The Company’s tenants are classified according to the U.S. Government’s North American Industrial Classification System (NAICS). Amounts reflect TIER REIT’s ownership %. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 16

Leasing Activity Summary For the Three Months Ended March 31, 2015 Occupancy Occupancy Cash Straight-lined % SF Activity for the Quarter (SF 000’s) SF % Net Rent /SF Net Rent /SF Rentable SF (000’s) % Increase of Cash Net Rent % Increase of SL Net Rent Market 12/31/2014 12/31/2014 3/31/2015 3/31/2015 Expiring Activity Expiring Activity Expirations Renewals Expansions New Austin Dallas/Fort Worth Houston Atlanta Charlotte Los Angeles Louisville Nashville Tampa Washington, D.C. 619 1,355 1,901 65 891 115 1,017 361 130 486 92.1% 82.2% 96.0% 80.0% 88.2% 100.0% 89.4% 88.4% 100.0% 75.9% 570 1,114 1,825 52 786 115 909 319 130 369 (3) (13) (50) (1) — — (24) (5) — (13) — 3 37 1 — ` 14 — — — — — 28 1 — — 15 — — — 8 25 7 1 3 — 7 16 — 39 575 1,129 1,847 54 789 115 921 330 130 395 92.9% 83.3% 97.2% 83.1% 88.6% 100.0% 90.6% 91.4% 100.0% 81.3% $ $ $ $ $ $ $ $ $ $ 17.86 29.91 21.21 16.56 30.24 — 10.47 8.15 — 34.72 $ $ $ $ $ $ $ $ $ $ 24.18 22.78 25.21 14.41 28.00 — 10.05 8.04 — 27.44 35% -24% 19% -13% -7% —% -4% -1% —% -21% $ $ $ $ $ $ $ $ $ $ 18.00 29.95 19.88 16.03 26.96 — 10.31 8.07 — 31.90 $ $ $ $ $ $ $ $ $ $ 23.34 24.63 26.42 14.86 28.67 — 10.65 8.40 — 27.52 30% -18% 33% -7% 6% —% 3% 4% —% -14% Operating office properties in strategic markets Other operating office properties Total 6,940 89.2% 6,189 (109) 55 44 106 6,285 90.6% $ 22.00 $ 21.14 -4% $ 20.91 $ 21.95 5% 5,547 86.7% 4,807 (169) 82 24 5 4,749 85.6% $ 18.76 $ 15.58 -17% $ 17.52 $ 15.67 -11% 12,487 88.1% 10,996 (278) 137 68 111 11,034 88.4% $ 20.86 $ 19.19 -8% $ 19.72 $ 19.74 —% Notes: Analysis relates to operating properties owned at the end of the period. Occupancy includes all leases for tenants under legal lease contracts that have commenced during the period. Rates for expiring leases relate to the lease previously occupying the specific space for which positive absorption was shown or the current lease rate if it is a first generation lease. Net Rent is equal to the fixed base rental amount paid by tenants under the terms of the related lease agreement less any portion of that base rent used by landlord to offset real estate taxes, utility charges, and other operating expenses incurred in connection with the leased space. Cash Net Rent disregards any free rent periods. Therefore, the rate shown is first monthly cash rent paid. Analysis shown at TIER REIT’s ownership %. The impact of short term temporary leasing activity is excluded from the analysis of % increase of cash net rent and % increase of SL net rent. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 17

Leasing Rate Activity Summary For the Three Months Ended March 31, 2015 Renewals Expansions New Cash Net Rent /SF Straight-lined Net Rent /SF Cash Net Rent /SF Straight-lined Net Rent /SF Cash Net Rent /SF Straight-lined Net Rent /SF Markets Austin Dallas/Fort Worth Houston Atlanta Charlotte Los Angeles Louisville Nashville Tampa Washington, D.C. Operating office properties in strategic markets Percentage increase (decrease) SF Expiring Activity Expiring Activity SF Expiring Activity Expiring Activity SF Expiring Activity Expiring Activity — 3 37 1 — — 14 — — — — 15.50 21.40 13.72 — — 10.11 — — — — 14.61 22.76 13.98 — — 9.89 — — — — 15.82 19.31 12.66 — — 9.95 — — — — $ 13.28 $ 24.18 $ 13.44 $— $— $ 10.07 — — 28 1 — — 15 — — — — — 23.25 15.03 — — 11.22 — — — — — $ 31.00 $ 16.02 — — $ 22.59 $ 14.65 — — $ 32.00 $ 16.80 $— $— $ 11.05 8 25 7 1 3 — 7 16 — 39 $ 17.86 $ 31.64 $ 12.08 $ 17.96 $ 30.24 $ 24.18 $ 23.76 $ 15.00 $ 13.94 $ 28.00 $— $ 10.80 $ 8.04 $— $ 27.44 $ 18.00 $ 31.64 $ 12.08 $ 17.53 $ 26.96 $ 23.34 $ 25.99 $ 15.93 $ 14.55 $ 28.67 $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ — — 9.87 — — — $ $ — — $ $ $ $ — 9.66 8.15 — $ $ $ $ — 9.13 8.07 — $ — $ 11.22 $ 11.02 $ 8.40 $ $ $ — — — $ $ $ — — — $ $ $ — — — $ — $ 34.72 $ 31.90 $ 27.52 55 $ 18.06 $ 18.88 $ 16.61 $ 19.80 44 $ 18.96 $ 23.46 $ 18.53 $ 24.51 106 $ 25.28 $ 21.37 $ 24.10 $ 22.01 5% 19% 24% 32% -15% -9% Other operating office properties Total Percentage increase (decrease) 82 $ 20.31 $ 16.35 $ 18.78 $ 16.09 24 $ 13.37 $ 13.14 $ 13.34 $ 14.54 5 $ 19.06 $ 14.70 $ 16.59 $ 14.12 137 $ 19.41 $ 17.36 $ 17.91 $ 17.58 68 $ 16.99 $ 19.82 $ 16.70 $ 20.99 111 $ 25.00 $ 21.07 $ 23.77 $ 21.66 -11% -2% 17% 26% -16% -9% Notes: Analysis relates to operating properties owned at the end of the period. SF includes all leases for tenants under legal lease contracts that have commenced during the period. Rates for expiring leases relate to the lease previously occupying the specific space for which positive absorption was shown or the current lease rate if it is a first generation lease. Net Rent is equal to the fixed base rental amount paid by tenants under the terms of the related lease agreement less any portion of that base rent used by landlord to offset real estate taxes, utility charges, and other operating expenses incurred in connection with the leased space. Cash Net Rent disregards any free rent periods. Therefore, the rate shown is first monthly cash rent paid. Analysis shown at TIER REIT’s ownership %. The impact of short term temporary leasing activity is excluded from the analysis of % increase of cash net rent and % increase of SL net rent. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 18

Lease Expirations For Four Quarters From April 1, 2015 (In thousands) Market Q2 2015 Q3 2015 Q4 2015 Q1 2016 Grand Total By Square Foot Austin Dallas/Fort Worth Houston Atlanta Charlotte Los Angeles Louisville Nashville Tampa Washington, D.C. Operating office properties in strategic markets Other operating office properties Total 9 33 79 — 34 33 33 145 — 6 2 7 57 — — — 7 16 — — 6 3 — 2 3 — 11 — — — 29 3 6 1 4 54 115 18 — 55 46 46 142 3 41 87 166 179 — 61 372 149 89 249 25 8 285 92 771 498 521 338 33 377 1,269 By Annualized Expiring Rentals Austin Dallas/Fort Worth Houston Atlanta Charlotte Los Angeles Louisville Nashville Tampa Washington, D.C. Operating office properties in strategic markets Other operating office properties Total $ 265 866 3,088 7 830 1,195 537 2,305 — 172 $ 52 260 2,327 5 — — 149 308 — — $ 202 80 — 46 91 — 201 — — — $ 1,026 109 108 13 146 1,987 2,421 371 — 2,675 $ 1,545 1,314 5,522 71 1,067 3,182 3,308 2,983 — 2,848 9,265 3,956 3,101 6,480 620 264 8,856 2,718 21,840 13,418 $ 13,221 $ 9,581 $ 884 $ 11,574 $ 35,258 By Expiring Rent Per SF Austin Dallas/Fort Worth Houston Atlanta Charlotte Los Angeles Louisville Nashville Tampa Washington, D.C. Operating office properties in strategic markets Other operating office properties Total $ $ $ $ $ $ $ $ $ $ 29.44 26.24 39.09 — 24.41 36.21 16.27 15.90 — 28.67 $ $ $ $ $ $ $ $ $ $ 26.00 37.14 40.82 — — — 21.29 19.25 — — $ $ $ $ $ $ $ $ $ $ 33.67 26.67 — 23.00 30.33 — 18.27 — — — $ $ $ $ $ $ $ $ $ $ 35.38 36.33 18.00 13.00 36.50 36.80 21.05 20.61 — 48.64 $ $ $ $ $ $ $ $ $ $ 33.59 28.57 38.89 23.67 26.02 36.57 19.93 16.66 — 46.69 $ $ 24.91 26.55 $ $ 34.84 26.02 $ $ 24.80 33.00 $ $ 31.07 29.54 $ $ 28.33 26.94 $ 25.38 $ 28.35 $ 26.79 $ 30.70 $ 27.78 Notes: Leases with an expiration on the last day of the period are considered leased at the last day of the period (i.e., expiring on the fist day of the following period). Reflects TIER REIT’s ownership %. Rentals shown above are the contractually obligated annualized base rent charged in the final month prior to lease termination grossed up to include current operating cost recoveries. TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 19

Lease Expirations Annually From April 1, 2015 (In thousands) Market By Square Foot Austin Dallas/Fort Worth Houston Atlanta Charlotte Los Angeles Louisville Nashville Tampa Washington, D.C. Operating office properties in strategic markets As a % of Occupied SF As a % of Total NRA Other operating office properties Total As a % of Occupied SF As a % of Total NRA 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025+ Grand Total 17 43 136 2 37 33 51 161 — 80 64 51 2 8 54 163 36 — 46 175 382 1 8 28 242 7 — 57 197 57 2 12 — 26 — — 100 245 341 7 439 — 146 — — 103 56 269 5 6 — 49 — — 37 42 215 3 7 — 3 21 — 96 117 13 4 — — 9 14 — 36 144 25 — 81 — 35 — — — — 272 3 35 — 14 4 130 — 47 88 25 156 — 184 87 — 572 1,130 1,849 54 789 115 922 330 130 6 137 30 22 13 33 12 25 19 5 92 394 486 8% 7% 595 9% 9% 919 15% 13% 373 6% 5% 1,291 21% 19% 521 8% 8% 340 5% 5% 278 4% 4% 340 5% 5% 463 7% 7% 679 11% 10% 6,285 100% 91% 406 232 368 794 613 470 332 489 374 57 614 4,749 892 827 1,287 1,167 1,904 991 672 767 714 520 1,293 11,034 8% 7% 7% 7% 12% 10% 11% 9% 17% 15% 9% 8% 6% 6% 7% 6% 6% 6% 5% 4% 12% 10% 100% 88% By Annualized Expiring Rentals Austin Dallas/Fort Worth Houston Atlanta Charlotte Los Angeles Louisville Nashville Tampa Washington, D.C. $ 519 1,206 5,415 58 921 1,195 887 2,613 — $ 2,899 1,952 1,258 51 260 1,987 3,292 699 — $ 1,663 4,020 12,887 16 277 1,008 4,610 142 — $ 2,027 4,931 2,387 39 465 — 506 — — $ 3,807 6,578 13,959 177 10,155 — 3,026 — — $ 4,077 1,825 7,970 127 209 — 940 — — $ 1,594 1,356 7,256 49 250 — 69 405 — $ 3,794 2,975 643 115 — — 187 283 — $ 1,511 4,166 1,203 — 2,903 — 828 — — — — 12,079 91 567 — 307 87 4,371 — 1,159 2,402 669 5,122 — 3,824 2,002 — $ 21,890 30,168 67,457 1,392 21,129 4,190 18,477 6,230 4,371 172 5,781 1,754 1,229 779 2,109 442 3,003 1,203 299 5,634 22,403 Operating office properties in strategic markets12,986 18,179 9% 26,377 13% 11,584 6% 38,481 19% 17,257 9% 11,421 6% 11,000 6% 11,814 6% 17,801 9% 20,812 11% 197,707 100% As a % of Total Annualized Expiring Other operating office properties Total As a % of Total Annualized Expiring 7% 10,700 6,918 12,496 21,717 17,435 12,341 8,904 15,005 12,085 1,463 11,988 131,054 $ 23,686 $ 25,097 $ 38,873 $ 33,301 $ 55,916 $ 29,598 $ 20,325 $ 26,005 $ 23,899 $ 19,264 $ 32,800 $ 328,762 7% 8% 12% 10% 17% 9% 7% 8% 7% 6% 10% 100% By Expiring Rent Per SF Austin Dallas/Fort Worth Houston Atlanta Charlotte Los Angeles Louisville Nashville Tampa Washington, D.C. $ $ $ $ $ $ $ $ $ 30.53 28.05 39.81 29.00 24.89 36.21 17.40 16.23 — $ $ $ $ $ $ $ $ $ 36.24 30.50 24.67 25.50 32.50 36.80 20.20 19.42 — $ $ $ $ $ $ $ $ $ 36.15 22.97 33.74 16.00 34.63 36.00 19.05 20.29 — $ $ $ $ $ $ $ $ $ 35.56 25.03 41.88 19.50 38.75 — 19.46 — — $ $ $ $ $ $ $ $ $ 38.07 26.85 40.94 25.29 23.13 — 20.73 — — $ $ $ $ $ $ $ $ $ 39.58 32.59 29.63 25.40 34.83 — 19.18 — — $ $ $ $ $ $ $ $ $ 43.08 32.29 33.75 16.33 35.71 — 23.00 19.29 — $ $ $ $ $ $ $ $ $ 39.52 25.43 49.46 28.75 — — 20.78 — — $ $ $ $ $ $ $ $ $ 41.97 28.93 48.12 — 35.84 — 23.66 — — $ $ $ $ $ $ $ $ $ — — 44.41 30.33 16.20 — 21.93 21.75 33.62 $ $ $ $ $ $ $ $ $ — 24.66 27.30 26.76 32.83 — 20.78 23.01 — $ $ $ $ $ $ $ $ $ 38.27 26.70 36.48 25.78 26.78 36.43 20.04 18.88 — $ 28.67 $ 42.20 $ 58.47 $ 55.86 $ 59.92 $ 63.91 $ 36.83 $ 120.12 $ 63.32 $ 59.80 $ 61.24 $ 56.86 Operating office properties in strategic markets $ 26.72 $ 30.55 $ 28.70 $ 31.06 $ 29.81 $ 33.12 $ 33.59 $ 39.57 $ 34.75 $ 38.45 $ 30.65 $ 31.46 Other operating office properties Total Notes: $ 26.36 $ 29.82 $ 33.96 $ 27.35 $ 28.44 $ 26.26 $ 26.82 $ 30.69 $ 32.31 $ 25.67 $ 19.52 $ 27.60 $ 26.55 $ 30.35 $ 30.20 $ 28.54 $ 29.37 $ 29.87 $ 30.25 $ 33.90 $ 33.47 $ 37.05 $ 25.37 $ 29.80 Leases with an expiration on the last day of the period are considered leased at the last day of the period (i.e., expiring on the first day of the following period). Reflects TIER REIT’s ownership %. Rentals shown above are the contractually obligated annualized base rent charged in the final month prior to lease termination grossed up to include current operating cost recoveries. TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 20

Occupancy Trends Rentable SF (in thousands) at March 31, 2015 Occupancy % Market 31-Mar-15 31-Dec-14 30-Sep-14 30-Jun-14 31-Mar-14 Austin Dallas/Fort Worth Houston Atlanta Charlotte Los Angeles Louisville Nashville Tampa Washington, D.C. Operating office properties in strategic markets Other operating office properties Total 619 1,355 1,901 65 891 115 1,017 361 130 486 93% 83% 97% 83% 89% 100% 91% 91% 100% 81% 92% 82% 96% 80% 88% 100% 89% 88% 100% 76% 92% 81% 98% 77% 88% 100% 89% 83% 57% 75% 89% 81% 94% 78% 88% 100% 86% 83% 57% 73% 86% 85% 94% 85% 87% 100% 86% 65% 57% 73% 6,940 5,547 91% 86% 89% 87% 88% 85% 86% 85% 86% 86% 12,487 88% 88% 87% 86% 86% Notes: Analysis relates to operating properties owned at the end of the most recent period and reflects TIER REIT’s ownership %. Occupancy % is as of the last day of the indicated period. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 21

Leasing Cost Summary For the Three Months Ended March 31, 2015 Weighted Average Leasing Costs Wtd Per Square Foot Per Square Foot / Year Avg SF (000’s) TI & Other TI & Other Term (Yrs) Renewal Comms Total Comms Total Market Austin Dallas/Fort Worth Houston Atlanta Charlotte Los Angeles Louisville Nashville Tampa Washington, D.C. Operating office properties in strategic markets Other operating office properties Total — 3 37 1 — — 14 — — — — 3.3 2.8 4.7 — — 2.1 — — — — 5.10 6.65 2.99 — — 0.94 — — — — 1.79 — 3.38 — — 0.08 — — — — 6.89 6.65 6.37 — — 1.02 — — — — 1.57 2.38 0.64 — — 0.45 — — — — 0.55 — 0.72 — — 0.04 — — — — 2.12 2.38 1.36 — — 0.49 — — — $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ 55 82 2.7 5.5 $ $ 5.05 7.69 $ $ 0.18 12.30 $ $ 5.23 19.99 $ $ 1.89 1.39 $ $ 0.07 2.23 $ $ 1.96 3.62 137 4.4 $ 6.63 $ 7.43 $ 14.06 $ 1.52 $ 1.70 $ 3.22 Expansion Market Austin Dallas/Fort Worth Houston Atlanta Charlotte Los Angeles Louisville Nashville Tampa Washington, D.C. Operating office properties in strategic markets Other operating office properties Total — — 28 1 — — 15 — — — — — 5.1 7.3 — — 4.3 — — — — — 14.39 2.52 — — 5.90 — — — — — 21.25 8.19 — — 21.16 — — — — — 35.64 10.71 — — 27.07 — — — — — 2.82 0.35 — — 1.38 — — — — — 4.17 1.12 — — 4.96 — — — — — 6.99 1.47 — — 6.34 — — — $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ 44 24 4.9 9.6 $ $ 11.23 11.59 $ $ 20.92 45.30 $ $ 32.15 56.89 $ $ 2.31 1.20 $ $ 4.30 4.70 $ $ 6.61 5.90 68 6.5 $ 11.35 $ 29.53 $ 40.88 $ 1.73 $ 4.51 $ 6.24 New Market Austin Dallas/Fort Worth Houston Atlanta Charlotte Los Angeles Louisville Nashville Tampa Washington, D.C. Operating office properties in strategic markets Other operating office properties Total 8 25 7 1 3 — 7 16 — 39 2.8 7.3 5.3 8.2 10.0 — 5.1 6.4 — 11.4 $ $ $ $ $ 5.47 8.68 8.07 13.34 17.64 — 3.87 6.68 — 32.04 $ $ $ $ $ 8.30 18.71 38.50 38.19 33.32 — 24.62 30.03 — 81.71 $ $ $ $ $ 13.77 27.39 46.57 51.53 50.96 — 28.49 36.71 — $ $ $ $ $ 1.95 1.19 1.51 1.63 1.76 — 0.75 1.04 — 2.82 $ $ $ $ $ 2.96 2.56 7.22 4.66 3.33 — 4.79 4.69 — 7.19 $ $ $ $ $ 4.92 3.75 8.73 6.28 5.10 — 5.54 5.74 — $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ 113.75 $ $ $ 10.00 106 5 8.1 5.2 $ $ 16.67 8.71 $ $ 45.11 4.40 $ $ 61.78 13.11 $ $ 2.04 1.68 $ $ 5.55 0.85 $ $ 7.59 2.52 111 8.0 $ 16.31 $ 43.27 $ 59.58 $ 2.04 $ 5.41 $ 7.45 Notes: Analysis relates to operating properties owned at the end of the period and reflects TIER REIT’s ownership %. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 22

Leasing Cost Trend Analysis Three Months Ended 31-Mar-15 Year Ended 31-Dec-14 Year Ended 31-Dec-13 Renewal Leasing Square Feet (in thousands) Weighted Average Term (in years) Commissions per SF TI and Other Leasing Cost per SF Total Leasing Cost per SF 137 4.4 6.63 7.43 1,298 5.7 4.68 4.62 1,504 4.3 4.55 7.68 $ $ $ $ 14.06 $ 9.30 $ 12.23 Commissions per SF per Year TI and Other Leasing Cost per SF per Year Total Leasing Cost per SF per Year $ 1.52 1.70 $ 0.93 0.74 $ 1.06 1.68 $ 3.22 $ 1.67 $ 2.74 Expansion Leasing Square Feet (in thousands) Weighted Average Term (in years) Commissions per SF TI and Other Leasing Cost per SF Total Leasing Cost per SF 68 6.5 11.35 29.53 264 6.6 9.41 21.39 389 6.1 8.10 19.17 $ $ $ $ 40.88 $ 30.80 $ 27.27 Commissions per SF per Year TI and Other Leasing Cost per SF per Year Total Leasing Cost per SF per Year $ 1.73 4.51 $ 1.41 3.11 $ 1.37 3.14 $ 6.24 $ 4.52 $ 4.51 New Leasing Square Feet (in thousands) Weighted Average Term (in years) Commissions per SF TI and Other Leasing Cost per SF Total Leasing Cost per SF 111 8.0 16.31 43.27 927 8.4 12.15 36.28 754 7.4 10.51 28.27 $ $ $ $ 59.58 $ 48.43 $ 38.78 Commissions per SF per Year TI and Other Leasing Cost per SF per Year Total Leasing Cost per SF per Year $ 2.04 5.41 $ 1.45 4.34 $ 1.42 3.82 $ 7.45 $ 5.79 $ 5.24 Total Leasing Square Feet (in thousands) Weighted Average Term (in years) Commissions per SF TI and Other Leasing Cost per SF Total Leasing Cost per SF 316 6.1 11.05 24.78 2,489 6.8 7.96 18.19 2,647 5.4 6.77 15.23 $ $ $ $ 35.82 $ 26.15 $ 22.00 Commissions per SF per Year TI and Other Leasing Cost per SF per Year Total Leasing Cost per SF per Year $ 1.81 4.05 $ 1.18 2.33 $ 1.24 2.8 $ 5.86 $ 3.51 $ 4.04 Notes: Analysis relates to operating properties owned at the end of the indicated period and reflects TIER REIT’s ownership %. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 23

Development, Leasing, and Capital Expenditures Summary (in thousands) For the Three Months Ended 31-Mar-15 31-Dec-14 30-Sep-14 30-Jun-14 31-Mar-14 Recurring Capital Expenditures Leasing costs Building improvements Subtotal recurring capital expenditures $ 10,253 2,994 $ 16,513 2,955 $ 10,148 5,908 $ 11,443 4,421 $ 10,202 7,761 13,247 19,468 16,056 15,864 17,963 Non-recurring capital expenditures Building improvements (1) Leasing costs (2) Development (3) Redevelopment (4) Subtotal non-recurring capital expenditures 125 5,454 2,286 4,506 — 9,868 8,962 1,532 — 6,621 3,310 391 — 6,488 8,378 1,591 — 4,834 8,641 896 12,371 20,362 10,322 16,457 14,371 Total capital expenditures $ 25,618 $ 39,830 $ 26,378 $ 32,321 $ 32,334 Notes: All Amounts represent TIER REIT’s ownership %. (1) (2) Non-recurring building improvements include costs identified as deferred capital needs at the acquisition of a property. Non-recurring leasing costs include costs incurred within 12 months of acquisition to lease space that was vacant at acquisition and costs incurred to lease space that has been vacant for at least 12 months. Cost incurred within 12 months of acquisition to lease space that was vacant at acquisition were as follows: $ 674 $ 203 $ — $ — $ — (3) (4) Development includes all new construction costs related to base building and all costs associated with leasing development projects. Redevelopment costs are for capital projects where substantial improvements are made to the property that change the character of the asset and are expected to result in development type returns on capital. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 24

Summary of Land Held for Future Development March 31, 2015 Approximate Buildable Square Feet Month of Acquisition Cost Basis (in millions) Project Market Acres Comments Hurstbourne Plaza Louisville 6.1 350,000 Dec-07 $ 13.8 Planned mixed-use redevelopment of the Hurstbourne Business Center Burnett Plaza Fort Worth 1.4 N/A Jan-07 $ 2.9 Planned mixed-use development and garage for use at Burnett Plaza 5104 Eisenhower Blvd. Tampa 5.2 130,000 Dec-07 $ 1.5 Office building Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 25

Acquisition and Disposition Activities For the Twelve Months Ended March 31, 2015 Number of Properties Square Feet (in thousands) Transaction Date Price (in thousands) Acquisitions Location 5950 Sherry Lane Dallas, TX 1 197 12/19/2014 $ 62,578 Dispositions City Hall Plaza 222 South Riverside Plaza One & Two Chestnut Place 250 West Pratt Manchester, NH Chicago, IL Worcester, MA Baltimore, MD 1 1 1 1 210 1,184 218 368 9/16/2014 12/19/2014 3/6/2015 3/19/2015 $ 19,750 (Note 1) 14,000 63,500 4 1,980 (1) The contract sales price for the 222 South Riverside Plaza property was approximately $247.0 million in cash, excluding transaction costs, credits, prorations, and adjustments; plus the conveyance of the 5950 Sherry Lane property. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 26

Summary of Financing March 31, 2015 (in thousands) Weighted Average Stated Interest Rate Principal % of Total Fixed Rate Debt Secured mortgage debt (1) Total fixed rate debt $ 852,670 5.65% 76% 852,670 5.65% 76% Variable Rate Debt Revolving credit facility (2) Term loan (2)(3) Construction loan Total variable rate debt Total debt 96,000 125,000 50,805 2.28% 3.73% 3.04% 9% 11% 4% 271,805 3.09% 24% $ 1,124,475 5.03% 100% (1) Includes $0.2 million of notes discount. (2) Additional borrowings of $180.3 million were available under the total credit facility. (3) The borrowing rate under the term loan has been effectively fixed through the use of an interest rate hedge. Maturities Revolving Credit Facility and Term Loan Secured Mortgage Debt Total Annual % Maturing Principal Rate (1) Principal Rate (1) Principal Rate (1) April - December 2015 2016 2017 2018 2019 Thereafter unamortized discount Total debt Weighted average maturity in years $ 116,495 560,968 130,530 — — 95,695 (213) 5.37% 5.40% 5.47% — — 6.29% $ — — — 96,000 125,000 — — — — — 2.28% 3.73% — $ 116,495 560,968 130,530 96,000 125,000 95,695 (213) 5.37% 5.40% 5.47% 2.28% 3.73% 6.29% 10% 50% 12% 9% 11% 8% $ 903,475 $ 221,000 $ 1,124,475 1.9 4.3 2.4 (1) Represents weighted average stated interest rate for debt maturing in this period. Maturities Our share of unconsolidated and held for sale debt Consolidated Debt Total Annual % Maturing Principal Rate (1) Principal Rate (1) Principal Rate (1) 2015 2016 2017 2018 2019 Thereafter unamortized premium (discount) Total debt Weighted average maturity in years $ 116,495 560,968 130,530 96,000 125,000 95,695 (213) 5.37% 5.40% 5.47% 2.28% 3.73% 6.29% $ 5,400 96,552 7,729 2,686 — 44,169 158 5.16% 5.85% 5.44% 4.75% — 3.83% $ 121,895 657,520 138,259 98,686 125,000 139,864 (55) 5.36% 5.47% 5.47% 2.34% 3.73% 5.51% 10% 51% 11% 8% 10% 10% $ 1,124,475 $ 156,694 $ 1,281,169 2.4 3.3 2.5 (1) Represents weighted average stated interest rate for debt maturing in this period. Hedging Details: 100% Effective Date Maturity Date Notional Value Type/Description Index Strike Rate Loan Designation Interest rate swap - cash flow hedge Interest rate swap - cash flow hedge Interest rate swap - cash flow hedge Interest rate swap - cash flow hedge $ $ $ $ 125,000 125,000 125,000 150,000 one-month LIBOR one-month LIBOR one-month LIBOR one-month LIBOR 1.6775% 1.6935% 1.7615% 1.7695% 31-Dec-14 30-Apr-15 30-Jun-15 30-Jun-15 31-Oct-19 31-Oct-19 31-May-22 31-May-22 Credit Facility Credit Facility Credit Facility Credit Facility TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 27

Principal Payments by Year as of March 31, 2015 (in thousands) Total 2015 2016 2017 2018 2019 Thereafter Buena Vista Plaza Lawson Commons Loop Central Woodcrest Corporate Center Plaza at MetroCenter Terrace Office Park Two BriarLake Plaza construction 1325 G Street Three Parkway Bank of America One & Two Eldridge 500 E. Pratt Credit Facility - Revolving Line Credit Facility - Term Loan One BriarLake Plaza - mezzanine One BriarLake Plaza $ 20,536 53,616 42,343 47,243 23,527 125,323 50,805 100,000 64,070 150,000 71,730 58,800 96,000 125,000 14,734 80,961 $ 20,536 53,616 42,343 635 274 1,308 — — 755 — 846 — — — 66 938 $ — — — 46,608 23,253 124,015 50,805 100,000 63,315 150,000 1,190 — — — 97 1,326 $ — — — — — — — — — — 69,694 58,800 — — 110 1,417 $ — — — — — — — — — — — — 96,000 — 121 1,501 $ — — — — — — — — — — — — — 125,000 134 1,589 $ — — — — — — — — — — — — — — 14,206 74,190 1,124,688 (213) $ 121,317 $ 560,609 $ 130,021 $ 97,622 $ 126,723 $ 88,396 unamortized premium (discount) Consolidated notes payable $1,124,475 Notes associated with investments in unconsolidated entities and excluded from the consolidated balance above: Wanamaker Building - retail (60%) Wanamaker Building - office (60%) Wanamaker Building - office (60%) Paces West (10%) (1) $ 5,400 2,686 44,169 7,729 $ 5,400 553 648 — $ — 769 897 — $ — 806 937 7,729 $ — 558 974 — $ — — 1,013 — $ — — 39,700 — 59,984 (114) $ 6,601 $ 1,666 $ 9,472 $ 1,532 $ 1,013 $ 39,700 unamortized premium (discount) Total unconsolidated notes payable $ 59,870 Notes associated with real estate held for sale Fifth Third - Columbus Fifth Third - Cleveland $ 49,423 47,129 $ 525 585 $ 48,898 46,544 $ — — $ — — $ — — $ — — 96,552 272 $ 1,110 $ 95,442 $ — $ — $ — $ — unamortized premium (discount) Total notes payable associated with assets held for sale $ 96,824 Total notes payable (2) % of principal payments due by year $1,281,224 $ 129,028 $ 657,717 $ 139,493 $ 99,154 $ 127,736 $ 128,096 100% 10% 51% 11% 8% 10% 10% (1) Paces West debt consists of an A note of $6.5 million and a B note of $1.2 million. Payment of the B note is only required if the distributions from the joint venture achieve certain investment return thresholds. Includes consolidated notes payable, our share of unconsolidated notes payable, and notes payable associated with real estate held for sale and excludes unamortized premium (discount). (2) TIER REIT Supplemental Operating and Financial Data 1st Quarter Page 28

Definitions of Non-GAAP Financial Measures We use non-GAAP financial measures in our public filings and other public disclosures. These non-GAAP financial measures are defined below. Funds from Operations (“FFO”) and Modified Funds from Operations (“MFFO”) Historical cost accounting for real estate assets in accordance with GAAP implicitly assumes that the value of real estate diminishes predictably over time. Since real estate values have historically risen or fallen with market conditions, many industry investors and analysts have considered the presentation of operating results for real estate companies that use historical cost accounting alone to be insufficient for evaluating operating performance. FFO is a non-GAAP financial measure that is widely recognized as a measure of a REIT’s operating performance. We use FFO as defined by the National Association of Real Estate Investment Trusts (“NAREIT”) in the April 2002 “White Paper on Funds From Operations” which is net income (loss), computed in accordance with GAAP, excluding extraordinary items, as defined by GAAP, gains (or losses) from sales of property and impairments of depreciable real estate (including impairments of investments in unconsolidated joint ventures and partnerships which resulted from measurable decreases in the fair value of the depreciable real estate held by the joint venture or partnership), plus depreciation and amortization on real estate assets, and after related adjustments for unconsolidated partnerships, joint ventures and subsidiaries and noncontrolling interests. The determination of whether impairment charges have been incurred is based partly on anticipated operating performance and hold periods. Estimated undiscounted cash flows from a property, derived from estimated future net rental and lease revenues, net proceeds on the sale of the property, and certain other ancillary cash flows are taken into account in determining whether an impairment charge has been incurred. While impairment charges for depreciable real estate are excluded from net income (loss) in the calculation of FFO as described above, impairments reflect a decline in the value of the applicable property which we may not recover. We believe that the use of FFO, together with the required GAAP presentations, is helpful in understanding our operating performance because it excludes real estate-related depreciation and amortization, gains and losses from property dispositions, impairments of depreciable real estate assets, and extraordinary items, and as a result, when compared year to year, reflects the impact on operations from trends in occupancy rates, rental rates, operating costs, development activities, general and administrative expenses, and interest costs, which are not immediately apparent from net income. Factors that impact FFO include fixed costs, yields on cash held in accounts, income from portfolio properties and other portfolio assets, interest rates on debt financing, and operating expenses. Since FFO was promulgated, several new accounting pronouncements have been issued, such that the presentation of FFO alone may be insufficient to evaluate operating performance. Accordingly, in addition to FFO, we use MFFO, as defined by the Investment Program Association (“IPA”). The IPA definition of MFFO excludes from FFO the following items: (1) (2) (3) (4) (5) acquisition fees and expenses; straight-line rent amounts, both income and expense; amortization of above-or below-market intangible lease assets and liabilities; amortization of discounts and premiums on debt investments; impairment charges on real estate related assets to the extent not already excluded from net income in the calculation of FFO, such as impairments of non-depreciable properties, loans receivable, and equity and debt investments; gains or losses from the early extinguishment of debt; gains or losses on the extinguishment or sales of hedges, foreign exchange, securities, and other derivative holdings except where the trading of such instruments is a fundamental attribute of our operations; gains or losses related to fair value adjustments for interest rate swaps and other derivatives not qualifying for hedge accounting, foreign exchange holdings, and other securities; gains or losses related to consolidation from, or deconsolidation to, equity accounting; gains or losses related to contingent purchase price adjustments; and adjustments related to the above items for unconsolidated entities in the application of equity accounting. (6) (7) (8) (9) (10) (11) We believe that MFFO is a helpful measure of operating performance because it excludes certain non-operating activities and certain recurring non-cash operating adjustments as outlined above. Accordingly, we believe that MFFO can be a useful metric in assessing the sustainability of operating performance. As explained below, management’s evaluation of our operating performance excludes the items considered in the calculation of MFFO based on the following economic considerations: • Acquisition fees and expenses. In evaluating investments in real estate, including both business combinations and investments accounted for under the equity method of accounting, management’s investment models and analyses differentiate costs to acquire the investment from the operations derived from the investment. GAAP requires acquisition costs related to business combinations and investments be expensed. We believe by excluding expensed acquisition costs, MFFO provides useful supplemental information that is comparable for our real estate investments and is consistent with management’s analysis of the investing and operating performance of our properties. Adjustments for straight-line rents and amortization of discounts and premiums on debt investments. In the application of GAAP, rental receipts and discounts and premiums on debt investments are allocated to periods using various systematic methodologies. This application will result in income recognition that could be significantly different than the underlying contract terms. By adjusting for these items, MFFO provides useful supplemental information on the realized economic impact of lease terms and debt investments and aligns results with management’s analysis of operating performance. Adjustments for amortization of above-or below-market intangible lease assets. Similar to depreciation and amortization of other real estate related assets that are excluded from FFO, GAAP implicitly assumes that the value of intangibles diminishes predictably over time and that these charges be recognized currently in revenue. Since real estate values and market lease rates in the aggregate have historically risen or fallen with market conditions, management believes that by excluding these charges, MFFO provides useful supplemental information on the realized economics of our real estate assets and aligns results with management’s analysis of operating performance. Impairment charges and gains or losses related to fair value adjustments for derivatives not qualifying for hedge accounting. Each of these items relates to a fair value adjustment, which, in part, is based on the impact of current market fluctuations and underlying assessments of general market conditions which may not be directly attributable to our current operating performance. As these gains • • • Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 29

or losses relate to underlying long-term assets and liabilities where we are not speculating or trading assets, management believes MFFO provides useful supplemental information by focusing on the changes in our core operating fundamentals rather than changes that may reflect anticipated gains or losses. In particular, because in most circumstances GAAP impairment charges are not allowed to be reversed if the underlying fair values improve or because the timing of impairment charges may lag the onset of certain operating consequences, we believe MFFO provides useful supplemental information related to current consequences, benefits and sustainability related to rental rates, occupancy, and other core operating fundamentals. Adjustment for gains or losses related to early extinguishment of hedges, debt, consolidation or deconsolidation, and contingent purchase price. Similar to extraordinary items excluded from FFO, these adjustments are not related to our continuing operations. By excluding these items, management believes that MFFO provides supplemental information related to sustainable operations that will be more comparable between other reporting periods and to other real estate operators. • By providing MFFO, we believe we are presenting useful information in the analysis of long-term operating activities. Many of these adjustments are similar to adjustments required by SEC rules for the presentation of pro forma business combination disclosures, particularly acquisition expenses, gains or losses recognized in business combinations, and other activity not representative of future activities. MFFO also provides useful information in analyzing comparability between reporting periods in assessing the sustainability of our operating performance. MFFO is primarily affected by the same factors as FFO, but without certain non-operating activities and certain recurring non-cash operating adjustments; therefore, we believe fluctuations in MFFO are more indicative of changes and potential changes in operating activities. MFFO is also more comparable in evaluating our performance over time. We also believe that MFFO is a recognized measure of sustainable operating performance by the real estate industry and is useful in comparing the sustainability of our operating performance with the sustainability of the operating performance of other real estate companies that do not have a similar level of involvement in acquisition activities or are not similarly affected by impairments and other non-operating charges. FFO or MFFO should neither be considered as an alternative to net income (loss), nor as indications of our liquidity, nor are they indicative of funds available to fund our cash needs, including our ability to make distributions. Additionally, the exclusion of impairments limits the usefulness of FFO and MFFO as historical operating performance measures since an impairment charge indicates that operating performance has been permanently affected. FFO and MFFO are not useful measures in evaluating net asset value because impairments are taken into account in determining net asset value but not in determining FFO or MFFO. Both FFO and MFFO are non-GAAP measurements and should be reviewed in connection with other GAAP measurements. Our FFO attributable to common stockholders and MFFO attributable to common stockholders as presented may not be comparable to amounts calculated by other REITs that do not define these terms in accordance with the current NAREIT or IPA definitions or that interpret those definitions differently. Funds Available for Distribution (“FAD”) FAD is a non-GAAP financial measure that we define as MFFO, excluding fair value mark to market adjustments, non-real estate depreciation and amortization, non-cash stock-based compensation expense, accretion of Series A Convertible Preferred Stock, the amortization of financing costs, and realized gains (losses) from the early extinguishment of derivatives, less recurring capital expenditures, each as adjusted for our pro rata share of consolidated and unconsolidated amounts. Recurring capital expenditures are those capital expenditures, tenant improvements, leasing commissions and deferred lease incentives that are incurred to maintain current in-place rents including the leasing costs incurred to replace tenants upon lease expiration. Recurring capital expenditures exclude non-recurring capital expenditures. Non-recurring capital expenditures are those capital expenditures (1) incurred to change the class or characterization of an asset, (2) identified as deferred capital needs at the acquisition of a property and were incurred within a reasonable period of time subsequent to the property’s acquisition, or (3) incurred for tenant improvements, leasing commissions, or deferred lease incentives within twelve months of acquisition to lease space that was vacant at acquisition and costs incurred to lease space that has been vacant for at least twelve months. Although our FAD may not be comparable to that of other REITs and real estate companies, we believe it provides a meaningful indicator of our ability to fund cash needs and to make cash distributions to equity owners. We believe that net income is the most directly comparable GAAP financial measure to FAD. FAD does not represent cash generated from operating activities in accordance with GAAP and should not be considered as an alternative to net income as an indication of our performance or to cash flows as a measure of liquidity or our ability to make distributions. Net Operating Income (“NOI”) NOI is a non-GAAP financial measure equal to rental revenue, less property operating expenses (excluding tenant improvement demolition costs), real estate taxes, and property management expenses. Our management uses NOI internally as a performance measure and believes NOI is useful to investors as a performance measure because NOI reflects only those income and expense items that are incurred at the property level and is therefore a useful measure for evaluating a property’s performance. Using NOI on a comparative basis allows investors to evaluate property level performance to: (a) hold management accountable for maintaining or increasing property level NOI from period to period and (b) compare the operating performance of our properties in a given market with the operating performance of other real estate companies in the same market, and consequently allocate their own investment capital accordingly. Further, we use NOI internally as a performance measure and believe NOI is useful to investors as a performance measure because, when compared year over year, NOI reflects the impact on operations from trends in occupancy rates, rental rates, operating costs, acquisition and development activities, and general and administrative expenses on an un-leveraged basis, providing perspective not immediately apparent from net income. NOI excludes certain components from net income in order to provide results that are more closely related to a property’s results of operations. Certain items such as interest expense, while included in net income, do not affect the operating performance of a real estate asset and are often incurred at the corporate level as opposed to the property level. In addition, depreciation and amortization are excluded from NOI because historical cost accounting for real estate assets implicitly assumes that the value of real estate assets diminishes predictably over time, and, instead, real estate values have historically risen or fallen with market conditions. NOI presented by us may not be comparable to NOI reported by other REITs that do not define NOI exactly as we do. We believe that in order to facilitate a clear understanding of our operating results, NOI should be examined in conjunction with net income as presented in our consolidated financial statements and notes thereto. NOI should not be considered as an alternative to net income as an indication of our performance or to cash flows as a measure of liquidity or our ability to make distributions. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 30

Same Store GAAP NOI and Same Store Cash NOI Same Store GAAP NOI is a non-GAAP financial measure equal to rental revenue, less lease termination fee income, property operating expenses (excluding tenant improvement demolition costs), real estate taxes, and property management expenses for our same store properties and is considered a non-GAAP financial measure. Same Store Cash NOI is equal to Same Store GAAP NOI less non-cash revenue items including straight-line rent adjustments and the amortization of above-and below-market rent. The same store properties include our consolidated operating properties owned and operated for the entirety of the current and comparable periods. We view Same Store GAAP NOI and Same Store Cash NOI as important measures of the operating performance of our properties because they allow us to compare operating results of consolidated properties owned and operating for the entirety of the current and comparable periods and therefore eliminate variations caused by acquisitions or dispositions during the periods under review. Same Store GAAP NOI and Same Store Cash NOI presented by us may not be comparable to Same Store GAAP NOI or Same Store Cash NOI reported by other REITs that do not define Same Store GAAP NOI or Same Store Cash NOI exactly as we do. We believe that in order to facilitate a clear understanding of our operating results, Same Store GAAP NOI and Same Store Cash NOI should be examined in conjunction with net income (loss) as presented in our consolidated financial statements and notes thereto. Same Store GAAP NOI and Same Store Cash NOI should not be considered as alternatives to net income (loss) as an indication of our performance or to cash flows as a measure of liquidity or our ability to make distributions. Earnings before Interest, Taxes, Depreciation and Amortization (“EBITDA”) EBITDA, a non-GAAP financial measure, is defined as net income (loss), plus interest expense, income tax expense, and depreciation and amortization expense, and after related adjustments for unconsolidated partnerships, joint ventures and subsidiaries, and noncontrolling interests. EBITDA is not intended to represent cash flow for the period, is not presented as an alternative to operating income as an indicator of operating performance, should not be considered in isolation or as a substitute for measures of performance prepared in accordance with GAAP, and is not indicative of operating income or cash provided by operating activities as determined under GAAP. EBITDA is presented solely as a supplemental disclosure with respect to liquidity because we believe it provides useful information regarding our ability to service or incur debt. Supplemental Operating and Financial Data TIER REIT 1st Quarter Page 31