Alexandria Real Estate Equities 8K Results of Operations and Financial Condition | ARE 29 Apr 10

Exhibit 99.2

SUPPLEMENTAL FINANCIAL, OPERATING,
& PROPERTY INFORMATION

QUARTER ENDED

MARCH 31, 2010

Conference Call Information:

Thursday, April 29, 2010

3:00PM Eastern Time/12:00PM Noon Pacific Time

Number: (719) 457-2668

Confirmation Code: 1945679

385 EAST COLORADO BOULEVARD, SUITE 299

PASADENA, CALIFORNIA 91101

(626) 578-9693

www.labspace.com

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Table of Contents

March 31, 2010

(Unaudited)

	Page
Company Profile		3
Investor Information		4
Equity Research Coverage		5
First Quarter Ended March 31, 2010 Operating and Financial Results		6
Condensed Consolidated Income Statements		10
Condensed Consolidated Balance Sheets		11
Earnings per Share		12
Funds from Operations		13
Adjusted Funds from Operations		14
Financial and Asset Base Highlights		15
Debt Information		18
Summary of Occupancy Percentage and Properties		22
Same Property Comparisons		23
Summary of Leasing Activity		24
Summary of Lease Expirations		26
20 Largest Client Tenants		27
Client Tenant Mix		28
Summary of Additions and Dispositions of Properties		29
Real Estate and Value Added Activities		30
Summary of Capital Expenditures		35
Definitions and Other Information		36

This Supplemental Financial, Operating, & Property Information package includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. You can identify the forward-looking statements by their use of forward-looking words, such as “believes,” “expects,” “may,” “will,” “should,” “seeks,” “approximately,” “intends,” “plans,” “estimates,” or “anticipates,” or the negative of those words or similar words. Our actual results may differ materially from those projected in such forward-looking statements. Factors that might cause such a difference include, without limitation, our failure to obtain capital (debt, construction financing, and/or equity) or refinance debt maturities, increased interest rates and operating costs, adverse economic or real estate developments in our markets, our failure to successfully complete and lease our existing space held for redevelopment and new properties acquired for that purpose and any properties undergoing development, our failure to successfully operate or lease acquired properties, decreased rental rates or increased vacancy rates or failure to renew or replace expiring leases, defaults on or non-renewal of leases by tenants, general and local economic conditions, and other risks and uncertainties detailed in our filings with the Securities and Exchange Commission (“SEC”). All forward-looking statements are made as of April 29, 2010, the date this Supplemental Financial, Operating, & Property Information package is first made available on our website, and we assume no obligation to update this information. For more discussion relating to risks and uncertainties that could cause actual results to differ materially from those anticipated in our forward-looking statements, and risks to our business in general, please refer to our SEC filings, including our most recent annual report on Form 10-K and any subsequent quarterly reports on Form 10-Q.

This Supplemental Financial, Operating, & Property Information package is not an offer to sell or solicitation to buy securities of Alexandria Real Estate Equities, Inc. Any offers to sell or solicitations to buy securities of Alexandria Real Estate Equities, Inc. shall be made only by means of a prospectus approved for that purpose. Unless otherwise indicated, the “Company,” “we,” “us,” and “our” refer to Alexandria Real Estate Equities, Inc. and its consolidated subsidiaries.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Company Profile

March 31, 2010

The Company

Alexandria Real Estate Equities, Inc. (the “Company” or “Alexandria”), a self-administered and self-managed real estate investment trust (“REIT”), is the largest owner and preeminent REIT focused principally on science-driven cluster formation. Our operating platform is based on the principle of “clustering” with assets and operations located in key life science markets. The Company has significant real estate assets adjacent to key life science entities which we believe results in higher occupancy levels, longer lease terms, and higher rental income and returns. These locations are in the best submarkets in each of the top life science cluster destinations, including San Francisco and San Diego, California, Eastern Massachusetts, New Jersey and Suburban Philadelphia, New York City, Southeast, Suburban Washington, D.C., Seattle, Washington, and international locations. Client tenants include institutional (universities and independent not-for-profit institutions), pharmaceutical, biotechnology, medical device, product, service, and translational entities, as well as government agencies. The Company was founded in 1994 by Jerry M. Sudarsky and Joel S. Marcus and the Company executed its initial public offering in 1997. Alexandria is well-known for its very well located high-quality environmentally sustainable real estate, technical infrastructure, and unique expertise it provides to its broad and diverse life science industry client tenant base.

Management

Alexandria’s executive and senior management team is highly experienced in the REIT industry (with both real estate and life science experience and expertise) and is the most accomplished team focused on providing high-quality environmentally sustainable real estate, technical infrastructure, and unique expertise to the broad and diverse life science industry. Our deep and talented team has decades of real estate and life science industry experience. We believe that our expertise, experience, reputation, and key life science relationships provide Alexandria significant competitive advantages in attracting new business opportunities. Our management team also includes highly experienced regional market directors each averaging over 20 years of real estate experience and over 10 years with Alexandria. Our regional market directors have tremendous experience and valuable relationships that enable Alexandria to develop long-term relationships with preeminent life science entities.

Strategy

Alexandria’s primary business objective is to maximize shareholder value by providing its shareholders and employees with the greatest possible total return. The key elements to our strategy include our consistent focus on the top life science cluster destinations with our properties located adjacent to life science entities driving growth and technological advances within each cluster. These adjacency locations are characterized by high barriers to entry, limited supply of available space, and represent highly desirable locations for tenancy by life science entities. Alexandria’s strategy also includes leveraging on its deep and broad life science and real estate relationships in order to attract new and leading life science client tenants and value added real estate opportunities through acquisitions, redevelopment, and development.

Summary (as of March 31, 2010)

Corporate headquarters	Pasadena, California
Markets	San Diego, San Francisco Bay, Eastern Massachusetts, New Jersey/Suburban Philadelphia, New York City, Southeast, Suburban Washington, D.C., Seattle, and International
Fiscal year-end	December 31
Total properties	161
Total rentable square feet	12.7 million
Common shares outstanding	43.9 million
Dividend – quarter/annualized	$0.35/$1.40
Dividend yield	2.1%
Total market capitalization	$6.1 billion

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Investor Information

March 31, 2010

Executive/Senior Management

Joel S. Marcus	Chairman & Chief Executive Officer	Thomas J. Andrews	SVP-Regional Market Director-Massachusetts
Dean A. Shigenaga	Chief Financial Officer & Treasurer	Vincent R. Ciruzzi	SVP-Construction and Development
James H. Richardson	Director and Senior Management Consultant	John J. Cox	SVP-Regional Market Director-Seattle
Peter J. Nelson	Corporate Secretary/Senior Management Consultant	John H. Cunningham	SVP-Regional Market Director-NY/Strategic Operations
Jennifer J. Pappas	SVP-General Counsel/Assistant Secretary	Larry J. Diamond	SVP-Regional Market Director-Mid Atlantic
Peter M. Moglia	Chief Investment Officer	Stephen A. Richardson	SVP-Regional Market Director-San Francisco Bay
		Jeff J. Ryan	SVP-Regional Market Director-San Diego

Company Information

Corporate Headquarters	Trading Symbol	Information Requests
385 East Colorado Boulevard, Suite 299	ARE	Phone: (626) 396-4828
Pasadena, California 91101	New York Stock Exchange	E-mail: corporateinformation@labspace.com
		Web: www.labspace.com

Common Stock Data (NYSE: ARE)

	1Q 2010		4Q 2009		3Q 2009		2Q 2009		1Q 2009
High trading price	$	69.03	$	68.24	$	62.49	$	43.76	$	66.69
Low trading price	$	55.54	$	51.35	$	30.33	$	30.48	$	31.19
Average closing price	$	62.97	$	57.67	$	46.57	$	36.31	$	48.64
Closing stock price, at the end of the quarter	$	67.60	$	64.29	$	54.35	$	35.79	$	36.40
Dividends per share – annualized	$	1.40	$	1.40	$	1.40	$	1.40	$	3.20
Dividend yield – annualized	2.1%		2.2%		2.6%		3.9%		8.8%
Common shares outstanding at the end of the quarter	43,919,968		43,846,050		43,715,900		39,040,518		38,974,166
Market value of outstanding common shares (in thousands)	$	2,968,990	$	2,818,863	$	2,375,959	$	1,397,260	$	1,418,660

Timing

Quarterly results for 2010 are expected to be announced according to the following schedule:
Second quarter	Late July 2010
Third quarter	Early November 2010
Fourth quarter	Early February 2011

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Equity Research Coverage

March 31, 2010

Argus Research		Green Street Advisors		Morningstar
William L. Eddleman, Jr.	(212) 425-7500	John Stewart	(949) 640-8780	David Rodziewicz	(312) 244-7037
		Michael Knott	(949) 640-8780

Banc of America Securities-Merrill Lynch		International Strategy & Investment Group Inc		RW Baird
James Feldman	(212) 449-6339	Steve Sakwa	(212) 446-9462	David AuBuchon	(314) 863-4235
Jana Galan	(212) 449-5151	George Auerbach	(212) 446-9459	Justin Pelham-Webb	(314) 863-6413

Barclays Capital		JMP Securities		Standard & Poor’s
Ross L. Smotrich	(212) 526-2306	William C. Marks	(415) 835-8944	Robert McMillan	(212) 438-9522
Jeffrey S. Langbaum	(212) 526-0971	Susan Gutierrez	(415) 835-3909

Citigroup Global Markets		JP Morgan Securities		UBS
Michael Bilerman	(212) 816-1383	Anthony Paolone	(212) 622-6682	Ross Nussbaum	(212) 713-2484
Quentin Velleley	(212) 816-6981	Joseph Dazio	(212) 622-6416	Robert Salisbury	(212) 713-4760

		Keefe, Bruyette & Woods
		Sheila McGrath	(212) 887-7793
		Kristin Brown	(212) 887-3810

Alexandria Real Estate Equities, Inc. is currently covered by the equity research analysts listed above. This list may not be complete and is subject to change as firms initiate or discontinue coverage of our company. Please note that any opinions, estimates or forecasts regarding our historical or predicted performance made by these analysts are theirs alone and do not represent opinions, forecasts, or predictions of Alexandria Real Estate Equities, Inc. or its management. Alexandria Real Estate Equities, Inc. does not by its reference above or distribution imply its endorsement of or concurrence with such information, conclusions, or recommendations. Interested persons may obtain copies of analysts’ reports on their own as we do not distribute these reports. Several of these firms may from time-to-time own our stock and/or hold other long or short positions in our stock, and may provide compensated services to us.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

First Quarter Ended March 31, 2010 Operating and Financial Results

Highlights

First Quarter 2010:

· First Quarter 2010 Funds from Operations Per Share (Diluted) Attributable to Alexandria Real Estate Equities, Inc.’s Common Stockholders of $1.09

· First Quarter 2010 Earnings Per Share (Diluted) Attributable to Alexandria Real Estate Equities, Inc.’s Common Stockholders of $0.47

· First Quarter 2010 GAAP Same Property Revenues Less Operating Expenses Up Approximately 1%

· Executed 42 Leases for 564,000 Rentable Square Feet, Including 137,000 Rentable Square Feet of Redevelopment and Development Space

· First Quarter 2010 GAAP Rental Rate Increase of 1.8% on Renewed/Released Space

· First Quarter 2010 Occupancy Remains Steady at 94.0%

· Completed Ground-Up Development of One Property in Seattle, Washington Aggregating 115,000 Rentable Square Feet Pursuant to a 10-Year Lease with Gilead Sciences, Inc.

· Completed Redevelopment of Space Aggregating 56,000 Rentable Square Feet; 100% Leased

· Repaid Two Secured Loans Aggregating $11 Million

· Sold One Property Aggregating 71,000 Rentable Square Feet Previously Classified as “Held For Sale”

· One Land Parcel for Future Ground-Up Development of an 80,000 Square Foot Building Classified as “Held for Sale” as of March 31, 2010

· Received LEED® Silver Certifications for Two Buildings in San Francisco Bay Market

Other:

· In April 2010, Executed a 10-Year Lease with Large Cap Life Science Company for 49,000 Rentable Square Feet at The Alexandria Center for Science and Technology at Mission Bay

Financial Results

For the first quarter of 2010, we reported funds from operations (“FFO”) attributable to Alexandria Real Estate Equities, Inc.’s common stockholders of $53,980,000, or $1.09 per share (diluted), compared to FFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders of $61,329,000, or $1.89 per share (diluted), for the first quarter of 2009. Comparing the first quarter of 2010 to the first quarter of 2009, FFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders decreased 12% and FFO per share (diluted) attributable to Alexandria Real Estate Equities, Inc.’s common stockholders decreased 42%. In the first quarter of 2009, we recognized additional rental income of approximately $18,509,000 related to a modification of a lease for a property in South San Francisco, California. Excluding the property in South San Francisco, California, FFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders was $43,424,000, or $1.34 per share (diluted), for the first quarter of 2009. The weighted average number of common stock outstanding for calculating FFO per share (diluted) attributable to Alexandria Real Estate Equities, Inc.’s common stockholders totaled 49,654,614 and 32,498,107 for the first quarter of 2010 and 2009, respectively.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

First Quarter Ended March 31, 2010 Operating and Financial Results

Financial Results (continued)

FFO is a non-GAAP measure widely used by publicly traded real estate investment trusts. We compute FFO in accordance with standards established by the Board of Governors of the National Association of Real Estate Investment Trusts (“NAREIT”) in its April 2002 White Paper and related implementation guidance. A reconciliation of net income attributable to Alexandria Real Estate Equities, Inc.’s common stockholders in accordance with United States generally accepted accounting principles (“GAAP”) to FFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders is included in the financial information accompanying this press release. The primary reconciling item between GAAP net income attributable to Alexandria Real Estate Equities, Inc.’s common stockholders and FFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders is depreciation and amortization expense. Depreciation and amortization expense for the three months ended March 31, 2010 and 2009 was $29,738,000 and $31,446,000, respectively. Net income attributable to Alexandria Real Estate Equities, Inc.’s common stockholders for the first quarter of 2010 was $20,542,000, or $0.47 per share (diluted), compared to net income attributable to Alexandria Real Estate Equities, Inc.’s common stockholders of $32,769,000, or $1.01 per share (diluted), for the first quarter of 2009. The weighted average number of common stock outstanding for calculating earnings per share (diluted) attributable to Alexandria Real Estate Equities, Inc.’s common stockholders totaled 43,857,513 and 32,498,107 for the first quarter of 2010 and 2009, respectively.

Leasing Activity

For the first quarter of 2010, we executed a total of 42 leases for approximately 564,000 rentable square feet of space at 28 different properties (excluding month-to-month leases). Of this total, approximately 348,000 rentable square feet related to new or renewal leases of previously leased space (renewed/released space) and approximately 216,000 rentable square feet related to developed, redeveloped or previously vacant space. Of the 216,000 rentable square feet, approximately 137,000 rentable square feet were related to our development or redevelopment programs, with the remaining approximately 79,000 rentable square feet related to previously vacant space. Rental rates for these new or renewal leases (renewed/released space) were on average approximately 1.8% higher (on a GAAP basis) than rental rates for expiring leases.

As of March 31, 2010, approximately 88% of our leases (on a rentable square footage basis) were triple net leases, requiring tenants to pay substantially all real estate taxes and insurance, common area and other operating expenses, including increases thereto. In addition, approximately 8% of our leases (on a rentable square footage basis) required the tenants to pay a majority of operating expenses. Additionally, approximately 92% of our leases (on a rentable square footage basis) provided for the recapture of certain capital expenditures, and approximately 94% of our leases (on a rentable square footage basis) contained effective annual rent escalations that were either fixed or indexed based on the consumer price index or another index.

Dispositions and Properties “Held for Sale”

In the first quarter of 2010, we sold one property located in the Seattle, Washington market aggregating 70,647 rentable square feet for approximately $11.8 million at a gain. This property was located outside of our primary submarket location in Seattle. The buyer of this building intends to invest a significant amount of capital prior to occupancy of it for their own use. As of March 31, 2010, one land parcel for future ground-up development of an 80,000 square foot building was classified as “held for sale.”

Other Recent Events

In April 2010, we executed a 10-year lease with a large cap life science company for approximately 49,000 rentable square feet at The Alexandria Center for Science and Technology at Mission Bay.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

First Quarter Ended March 31, 2010 Operating and Financial Results

Earnings Outlook

Based on our current view of existing market conditions and certain current assumptions, our updated guidance for FFO per share (diluted) attributable to Alexandria Real Estate Equities, Inc.’s common stockholders and earnings per share (diluted) attributable to Alexandria Real Estate Equities, Inc.’s common stockholders is as follows:

		2010
FFO per share (diluted)		$4.43
Earnings per share (diluted)		$1.80

Client Tenant Base

The quality, diversity, breadth, and depth of our significant relationships with our life science client tenants provide Alexandria Real Estate Equities, Inc. (“Alexandria”) with consistent and solid cash flows. As of March 31, 2010, Alexandria’s multinational pharmaceutical client tenants represented approximately 28% of our annualized base rent, led by Novartis AG, Roche Holding Ltd, GlaxoSmithKline plc, Pfizer Inc., Johnson & Johnson, and Merck & Co., Inc.; revenue-producing life science product and service companies represented approximately 19%, led by Quest Diagnostics Incorporated, Qiagen N.V., Laboratory Corporation of America Holdings, and Monsanto Company; public biotechnology companies represented approximately 18% and included the three largest in the sector, Amgen Inc., Gilead Sciences, Inc., and Celgene Corporation; government agencies and renowned medical and research institutions represented approximately 15% and included The Scripps Research Institute, Massachusetts Institute of Technology, Fred Hutchinson Cancer Research Center, University of Washington, Sanford-Burnham Medical Research Institute, and the United States Government; private biotechnology companies represented approximately 13% and included high-quality, leading-edge companies with blue-chip venture and institutional investors, including Ambrx, Inc., Intellikine, Inc., MacroGenics, Inc., and Tolerx, Inc.; and the remaining approximately 7% consisted of traditional office tenants. Two of the fastest-growing client tenant sectors by revenue currently include leading institutional and multinational pharmaceutical entities. Alexandria’s strong life science underwriting skills, long-term life science industry relationships, and sophisticated management with both real estate and life science operating expertise set the Company apart from all other publicly traded REITs and real estate companies.

Earnings Call Information

We will host a conference call on Thursday, April 29, 2010 at 3:00 p.m. Eastern Time (“ET”)/12:00 p.m. noon Pacific Time (“PT”) that is open to the general public to discuss our financial and operating results for the first quarter ended March 31, 2010. To participate in this conference call, dial (719) 457-2668 and confirmation code 1945679, shortly before 3:00 p.m ET/12:00 p.m. noon PT. The audio web cast can be accessed at: www.labspace.com, in the Corporate Information section. A replay of the call will be available for a limited time from 6:00 p.m. ET/3:00 p.m. PT on Thursday, April 29, 2010. The replay number is (719) 457-0820 and the confirmation code is 1945679.

Additionally, a copy of Alexandria Real Estate Equities, Inc.’s Supplemental Financial, Operating, & Property Information for the quarter ended March 31, 2010 and this press release are available in the Corporate Information section of our website at www.labspace.com.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

First Quarter Ended March 31, 2010 Operating and Financial Results

About the Company

Alexandria Real Estate Equities, Inc., Landlord of Choice to the Life Science Industry®, is the largest owner and preeminent REIT focused principally on cluster development through the ownership, operation, management, selective redevelopment, development, and acquisition of properties containing life science laboratory space. Alexandria is the leading provider of high-quality, environmentally sustainable real estate, technical infrastructure, and services to the broad and diverse life science industry. Client tenants include institutional (universities and independent not-for-profit institutions), pharmaceutical, biotechnology, medical device, product, service, and translational entities, as well as government agencies. Alexandria’s operating platform is based on the principle of “clustering,” with assets and operations located in key life science markets. Our asset base contains 161 properties approximating 12.7 million rentable square feet consisting of 156 properties approximating 11.8 million rentable square feet (including spaces undergoing active redevelopment) and five properties undergoing ground-up development approximating an additional 865,000 rentable square feet. In addition, our asset base will enable us to grow to approximately 24.0 million rentable square feet through additional ground-up development of approximately 11.3 million rentable square feet.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Condensed Consolidated Income Statements

(Dollars in thousands, except per share data)

(Unaudited)

	Three Months Ended (1)
	3/31/2010		12/31/2009		9/30/2009		6/30/2009 (2)		3/31/2009 (3)
Revenues
Rental	$	88,858	$	88,702	$	88,419	$	87,461	$	104,011
Tenant recoveries	26,558		25,414		26,230		24,668		26,796
Other income	1,071		1,009		1,177		8,910		752
Total revenues	116,487		115,125		115,826		121,039		131,559

Expenses
Rental operations	31,651		29,451		31,218		29,224		32,434
General and administrative	9,481		8,468		9,611		8,804		9,418
Interest	17,562		19,452		21,225		21,373		20,199
Depreciation and amortization	29,735		29,007		28,112		29,500		31,242
Total expenses	88,429		86,378		90,166		88,901		93,293

Gain on early extinguishment of debt	–		–		–		11,254		–
Income from continuing operations	28,058		28,747		25,660		43,392		38,266
Income from discontinued operations, net	727		1,158		718		724		2,983
Net income	28,785		29,905		26,378		44,116		41,249

Net income attributable to noncontrolling interests	935		924		886		4,362		875
Dividends on preferred stock	7,089		7,089		7,090		7,089		7,089
Net income attributable to unvested restricted stock awards	219		242		199		367		517
Net income attributable to Alexandria Real Estate Equities, Inc.’s common stockholders	$	20,542	$	21,650	$	18,203	$	32,298	$	32,768

Earnings per share attributable to Alexandria Real Estate Equities, Inc.’s common stockholders – basic
Continuing operations	$	0.45	$	0.47	$	0.45	$	0.81	$	0.92
Discontinued operations, net	0.02		0.03		0.02		0.02		0.09
Earnings per share – basic	$	0.47	$	0.50	$	0.47	$	0.83	$	1.01

Earnings per share attributable to Alexandria Real Estate Equities, Inc.’s common stockholders – diluted
Continuing operations	$	0.45	$	0.46	$	0.45	$	0.80	$	0.92
Discontinued operations, net	0.02		0.03		0.02		0.02		0.09
Earnings per share – diluted	$	0.47	$	0.49	$	0.47	$	0.82	$	1.01

(1) Certain prior year amounts have been reclassified to conform to current year presentation related to discontinued operations.

(2) During the second quarter of 2009, we recognized additional income approximating $7.2 million for a cash receipt related to real estate acquired in November 2007. Additionally during the second quarter of 2009, we recognized a gain on early extinguishment of debt of approximately $11.3 million related to the repurchase, in privately negotiated transactions, of approximately $75 million (par value) of our 3.7% unsecured convertible notes.

(3) During the first quarter of 2009, we recognized approximately $18.5 million of additional rental income related to the modification of a lease in South San Francisco.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Condensed Consolidated Balance Sheets

(In thousands)

(Unaudited)

	March 31,			December 31,			September 30,			June 30,			March 31,
	2010			2009			2009			2009			2009
Assets
Investments in real estate:
Rental properties	$	3,937,876		$	3,903,955		$	3,867,725		$	3,720,238		$	3,683,249
Less: accumulated depreciation	(538,570		)	(520,647		)	(500,765		)	(476,970		)	(452,539		)
Rental properties, net	3,399,306			3,383,308			3,366,960			3,243,268			3,230,710
Land held for future development	294,631			255,025			254,549			240,411			109,561
Construction in progress	1,326,865			1,400,795			1,349,656			1,406,451			1,452,434
Investment in unconsolidated real estate entity (1)	34,421			–			–			–			–
Investments in real estate, net	5,055,223			5,039,128			4,971,165			4,890,130			4,792,705
Cash and cash equivalents	70,980			70,628			68,280			70,313			125,281
Restricted cash	35,832			47,291			60,002			51,683			54,770
Tenant receivables	2,710			3,902			3,789			4,665			5,992
Deferred rent	99,248			96,700			92,022			87,697			85,970
Investments	76,918			72,882			71,080			66,068			64,788
Other assets	127,623			126,696			126,999			116,097			112,669

Total assets	$	5,468,534		$	5,457,227		$	5,393,337		$	5,286,653		$	5,242,175

Liabilities and Equity
Secured notes payable	$	884,839		$	937,017		$	837,177		$	941,600		$	1,041,854
Unsecured line of credit and unsecured term loan	1,291,000			1,226,000			1,248,000			1,307,000			1,355,000
Unsecured convertible notes	586,975			583,929			580,919			577,984			433,408
Accounts payable, accrued expenses, and tenant security deposits	284,830			282,516			325,720			312,313			331,715
Dividends payable	21,709			21,686			21,665			20,005			37,701
Total liabilities	3,069,353			3,051,148			3,013,481			3,158,902			3,199,678

Redeemable noncontrolling interests	17,490			41,441			41,232			41,012			32,887

Alexandria Real Estate Equities, Inc. stockholders’ equity:
Series C preferred stock	129,638			129,638			129,638			129,638			129,638
Series D cumulative convertible preferred stock	250,000			250,000			250,000			250,000			250,000
Common stock	439			438			437			390			390
Additional paid-in capital	1,987,512			1,977,062			1,961,421			1,718,737			1,668,546
Accumulated other comprehensive loss	(26,990		)	(33,730		)	(44,162		)	(53,013		)	(79,868		)
Total Alexandria Real Estate Equities, Inc. stockholders’ equity	2,340,599			2,323,408			2,297,334			2,045,752			1,968,706
Noncontrolling interests	41,092			41,230			41,290			40,987			40,904
Total equity	2,381,691			2,364,638			2,338,624			2,086,739			2,009,610
Total	$	5,468,534		$	5,457,227		$	5,393,337		$	5,286,653		$	5,242,175

(1) See page 40 for additional information.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Earnings per Share

(Dollars in thousands, except per share data)

(Unaudited)

Earnings per Share

	Three Months Ended
	3/31/2010		12/31/2009		9/30/2009		6/30/2009 (1)		3/31/2009 (2)
Net income attributable to Alexandria Real Estate Equities, Inc.’s common stockholders – numerator for basic earnings per share	$	20,542	$	21,650	$	18,203	$	32,298	$	32,768
Assumed conversion of 8% unsecured convertible notes	–		–		–		3,197		–
Effect of dilutive securities and assumed conversion attributable to unvested restricted stock awards	–		–		–		3		1
Net income attributable to Alexandria Real Estate Equities, Inc.’s common stockholders assuming effect of dilutive securities and assumed conversion – numerator for diluted earnings per share	$	20,542	$	21,650	$	18,203	$	35,498	$	32,769

Weighted average shares of common stock outstanding for calculating earnings per share attributable to Alexandria Real Estate Equities, Inc.’s common stockholders – denominator for basic earnings per share	43,821,765		43,715,462		39,094,018		38,929,971		32,478,671
Effect of dilutive securities and assumed conversion:
Dilutive effect of stock options	35,748		34,839		11,932		1,167		19,436
Assumed conversion of 8% unsecured convertible notes	–		–		–		4,140,787		–
Weighted average shares of common stock outstanding for calculating earnings per share attributable to Alexandria Real Estate Equities, Inc.’s common stockholders assuming effect of dilutive securities and assumed conversion – denominator for diluted earnings per share	43,857,513		43,750,301		39,105,950		43,071,925		32,498,107

Earnings per share attributable to Alexandria Real Estate Equities, Inc.’s common stockholders
Basic	$	0.47	$	0.50	$	0.47	$	0.83	$	1.01
Diluted	$	0.47	$	0.49	$	0.47	$	0.82	$	1.01

(1) During the second quarter of 2009, we recognized additional income approximating $7.2 million for a cash receipt related to real estate acquired in November 2007. Additionally during the second quarter of 2009, we recognized a gain on early extinguishment of debt of approximately $11.3 million related to the repurchase, in privately negotiated transactions, of approximately $75 million (par value) of our 3.7% unsecured convertible notes.

(2) During the first quarter of 2009, we recognized approximately $18.5 million of additional rental income related to the modification of a lease in South San Francisco.

See “Definitions and Other Information” section of this report starting on page 36.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Funds from Operations

(Dollars in thousands, except per share data)

(Unaudited)

Funds from Operations (“FFO”)

The following table presents a reconciliation of net income attributable to Alexandria Real Estate Equities, Inc.’s common stockholders, the most directly comparable financial measure calculated and presented in accordance with United States generally accepted accounting principles (“GAAP”), to FFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders for the three month periods below:

	Three Months Ended
	3/31/2010			12/31/2009			9/30/2009			6/30/2009 (1)			3/31/2009 (2)
Net income attributable to Alexandria Real Estate Equities, Inc.’s common stockholders	$	20,542		$	21,650		$	18,203		$	32,298		$	32,768
Add: Depreciation and amortization (3)	29,738			29,004			28,336			29,722			31,446
Add: Net income attributable to noncontrolling interests	935			924			886			4,362			875
Add: Net income attributable to unvested restricted stock awards	219			242			199			367			517
Subtract: Gain on sales of property	(24		)	(393		)	–			–			(2,234		)
Subtract: FFO attributable to noncontrolling interests	(1,098		)	(1,006		)	(918		)	(842		)	(1,077		)
Subtract: FFO attributable to unvested restricted stock awards	(530		)	(558		)	(505		)	(740		)	(966		)
FFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders – numerator for basic FFO per share	49,782			49,863			46,201			65,167			61,329
Add: Assumed conversion of 8% unsecured convertible notes	4,194			4,362			4,384			3,197			–
Add: Effect of dilutive securities and assumed conversion attributable to unvested restricted stock awards	4			22			24			37			–
FFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders assuming effect of dilutive securities and assumed conversion – numerator for diluted FFO per share	$	53,980		$	54,247		$	50,609		$	68,401		$	61,329

Weighted average shares of common stock outstanding for calculating FFO per share attributable to Alexandria Real Estate Equities, Inc.’s common stockholders – denominator for basic FFO per share	43,821,765			43,715,462			39,094,018			38,929,971			32,478,671
Effect of dilutive securities and assumed conversion:
Dilutive effect of stock options	35,748			34,839			11,932			1,167			19,436
Assumed conversion of 8% unsecured convertible notes	5,797,101			5,797,101			5,797,101			4,140,787			–
Weighted average shares of common stock outstanding for calculating FFO per share attributable to Alexandria Real Estate Equities, Inc.’s common stockholders assuming effect of dilutive securities and assumed conversion – denominator for diluted FFO per share	49,654,614			49,547,402			44,903,051			43,071,925			32,498,107

FFO per share attributable to Alexandria Real Estate Equities, Inc.’s common stockholders
Basic	$	1.14		$	1.14		$	1.18		$	1.67		$	1.89

Diluted	$	1.09		$	1.09		$	1.13		$	1.59		$	1.89

(2) During the first quarter of 2009, we recognized approximately $18.5 million of additional rental income related to the modification of a lease in South San Francisco.

(3) Includes depreciation and amortization for assets “held for sale” classified as discontinued operations for the periods prior to when such assets were designated as “held for sale.”

See “Definitions and Other Information” section of this report starting on page 36.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Adjusted Funds from Operations
(Dollars in thousands)
(Unaudited)

Adjusted Funds from Operations

The following table presents a reconciliation of FFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders to adjusted funds from operations (“AFFO”) attributable to Alexandria Real Estate Equities, Inc.’s common stockholders:

	Three Months Ended

	3/31/2010			12/31/2009			9/30/2009			6/30/2009 (1)			3/31/2009 (2)
FFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders	$	49,782		$	49,863		$	46,201		$	65,167		$	61,329
Add/(deduct):
Capital expenditures	(303		)	(607		)	(565		)	(270		)	(492		)
Second generation tenant improvements and leasing costs	(1,485		)	(2,334		)	(819		)	(894		)	(691		)
Amortization of loan fees	2,072			2,081			2,061			2,023			1,793
Amortization of debt premiums/discounts	3,026			2,998			2,923			2,605			2,262
Amortization of acquired above and below market leases	(2,247		)	(1,457		)	(1,510		)	(1,736		)	(4,745		)
Deferred rent	(4,135		)	(7,064		)	(3,106		)	(2,700		)	(1,509		)
Net stock compensation	2,731			3,194			4,141			3,694			3,022
Capitalized income from development projects	1,356			1,660			1,545			1,631			1,662
Deferred rent on ground leases	1,432			1,400			1,564			1,478			1,124
Gain on early extinguishment of debt	–			–			–			(11,254		)	–
Allocation to unvested restricted stock awards	(25		)	1			(67		)	61			(38		)
AFFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders	$	52,204		$	49,735		$	52,368		$	59,805		$	63,717

Weighted average shares of common stock outstanding for calculating earnings per share attributable to Alexandria Real Estate Equities, Inc.’s common stockholders assuming effect of dilutive securities and assumed conversion – denominator for diluted earnings per share	43,857,513			43,750,301			39,105,950			43,071,925			32,498,107
Less: Assumed conversion of 8% unsecured convertible notes	–			–			–			4,140,787			–
	43,857,513			43,750,301			39,105,950			38,931,138			32,498,107

(2) During the first quarter of 2009, we recognized approximately $18.5 million of additional rental income related to the modification of a lease in South San Francisco.

See “Definitions and Other Information” section of this report starting on page 36.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Financial and Asset Base Highlights

(Dollars in thousands, except per share amounts)

(Unaudited)

	3/31/2010		12/31/2009		9/30/2009		6/30/2009		3/31/2009
Balance Sheet Data
Rental properties, net	$	3,399,306	$	3,383,308	$	3,366,960	$	3,243,268	$	3,230,710
Land held for future development	$	294,631	$	255,025	$	254,549	$	240,411	$	109,561
Construction in progress	$	1,326,865	$	1,400,795	$	1,349,656	$	1,406,451	$	1,452,434
Investment in unconsolidated real estate entity	$	34,421	$	–	$	–	$	–	$	–
Gross book value of real estate	$	5,593,793	$	5,559,775	$	5,471,930	$	5,367,100	$	5,245,244
Tangible non-real estate assets	$	222,248	$	227,440	$	239,076	$	224,016	$	283,306
Total assets	$	5,468,534	$	5,457,227	$	5,393,337	$	5,286,653	$	5,242,175
Secured notes payable	$	884,839	$	937,017	$	837,177	$	941,600	$	1,041,854
Outstanding balance on unsecured line of credit	$	541,000	$	476,000	$	498,000	$	557,000	$	605,000
Outstanding balance on unsecured term loan	$	750,000	$	750,000	$	750,000	$	750,000	$	750,000
3.7% unsecured convertible notes	$	369,961	$	368,027	$	366,120	$	364,242	$	433,408
8.0% unsecured convertible notes	$	217,014	$	215,902	$	214,799	$	213,742	$	–
Total debt	$	2,762,814	$	2,746,946	$	2,666,096	$	2,826,584	$	2,830,262
Total liabilities	$	3,069,353	$	3,051,148	$	3,013,481	$	3,158,902	$	3,199,678
Common shares outstanding	43,919,968		43,846,050		43,715,900		39,040,518		38,974,166
Total market capitalization	$	6,112,219	$	5,946,639	$	5,417,648	$	4,580,406	$	4,600,039

	Three Months Ended
	3/31/2010		12/31/2009		9/30/2009		6/30/2009 (1)		3/31/2009 (2)
Operating Data
Total revenue	$	116,487	$	115,125	$	115,826	$	121,039	$	131,559
Deferred rent	$	4,135	$	7,064	$	3,106	$	2,700	$	1,509
Amortization of acquired above and below market leases	$	2,247	$	1,457	$	1,510	$	1,736	$	4,745
Non-cash amortization of discount on unsecured convertible notes	$	3,046	$	3,009	$	2,935	$	2,612	$	2,263
Net income attributable to Alexandria Real Estate Equities, Inc.’s common stockholders	$	20,542	$	21,650	$	18,203	$	32,298	$	32,768
Earnings per share – diluted	$	0.47	$	0.49	$	0.47	$	0.82	$	1.01
FFO attributable to Alexandria Real Estate, Inc.’s common stockholders – diluted	$	53,980	$	54,247	$	50,609	$	68,401	$	61,329
FFO per share – diluted	$	1.09	$	1.09	$	1.13	$	1.59	$	1.89
Weighted average common shares outstanding – EPS – diluted	43,857,513		43,750,301		39,105,950		43,071,925		32,498,107
Weighted average common shares outstanding – FFO – diluted	49,654,614		49,547,402		44,903,051		43,071,925		32,498,107

(2) During the first quarter of 2009, we recognized approximately $18.5 million of additional rental income related to the modification of a lease in South San Francisco.

See “Definitions and Other Information” section of this report starting on page 36.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Financial and Asset Base Highlights (continued)

(Dollars in thousands, except per share amounts)

(Unaudited)

	Three Months Ended
	3/31/2010		12/31/2009			9/30/2009		6/30/2009 (1)		3/31/2009 (2)
Financial, Debt, and Other Ratios
Unencumbered net operating income as a percentage of total net operating income	57%		55%			60%		61%		64%
Unencumbered assets gross book value	$	4,250,976	$	4,166,066		$	4,092,300	$	3,971,718	$	3,912,462
Unencumbered assets gross book value as a percentage of gross assets	71%		70%			69%		69%		69%
Percentage outstanding on unsecured line of credit at end of period	47%		41%			43%		48%		53%
Operating margin	73%		74%			73%		74%		75%
Adjusted EBITDA margin	68%		70%			69%		72%		71%
General and administrative expense as a percentage of total revenues	8.1%		7.4%			8.3%		7.3%		7.2%
EBITDA – trailing 12 months (1)(2)	$	325,596	$	342,428		$	341,639	$	342,624	$	321,518
Adjusted EBITDA – trailing 12 months (1)(2)	$	327,685	$	342,598		$	353,831	$	354,198	$	343,525
Capitalized interest	$	19,509	$	18,976		$	17,933	$	18,240	$	16,919
Weighted average interest rate used for capitalization during period	5.20%		5.42%			5.16%		5.23%		4.89%
Net debt to gross assets (3)	45.0%		44.9%			44.0%		47.9%		48.1%
Secured debt as a percentage of gross assets (3)	15%		16%			14%		16%		18%
Net debt to Adjusted EBITDA – trailing 12 months (1)(2)	8.1		7.7			7.2		7.6		7.7
Dividends per share on common stock	$	0.35	$	0.35		$	0.35	$	0.35	$	0.80
Dividend payout ratio (common stock)	29%		29%			31%		20%		51%

	1Q 2010		4Q 2009			3Q 2009		2Q 2009		1Q 2009
Asset Base Statistics
Number of properties (3)	161		162			163		163		163
Rentable square feet (3)	12,675,439		12,746,086			12,793,644		12,793,644		12,793,644
Occupancy of operating properties (3)	94.0%		94.1%			94.4%		94.5%		94.3%
Occupancy including redevelopment properties (3)	88.9%		89.4%			89.1%		89.4%		89.6%
Leasing activity – YTD rentable square feet	563,901		1,864,347			1,349,098		935,580		464,603
Leasing activity – Qtr rentable square feet	563,901		489,079			449,515		472,822		464,603
Leasing activity – YTD GAAP rental rate increase	1.8%		3.5%			4.9%		4.0%		5.4%
Leasing activity – Qtr GAAP rental rate increase	1.8%		1.5%			5.6%		3.3%		5.4%
Leasing activity – YTD Cash rental rate increase	0.7%		0.1%			2.8%		2.5%		3.1%
Leasing activity – Qtr Cash rental rate increase	0.7%		(8.0%		)	1.6%		2.1%		3.1%
Same property YTD revenue less operating expenses – GAAP basis	0.8%		2.8%			3.7%		4.0%		3.6%
Same property Qtr revenue less operating expenses – GAAP basis	0.8%		1.1%			0.8%		2.2%		3.6%
Same property YTD revenue less operating expenses – Cash basis	0.4%		4.7%			7.1%		7.1%		5.3%
Same property Qtr revenue less operating expenses – Cash basis	0.4%		1.3%			4.3%		5.8%		5.3%

(2) During the first quarter of 2009, we recognized approximately $18.5 million of additional rental income related to the modification of a lease in South San Francisco.

(3) At end of period.

See “Definitions and Other Information” section of this report starting on page 36.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Financial and Asset Base Highlights (continued)

(Unaudited)

Summary of Occupancy Percentage

	December 31,
	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	1Q10	Average
Occupancy of operating properties – end of period	96.2%	95.7%	98.4%	99.0%	96.3%	93.9%	95.2%	93.2%	93.1%	93.8%	94.8%	94.1%	94.0%	95.2%
Occupancy including redevelopment properties – end of period	92.9%	91.5%	90.8%	88.6%	89.2%	88.4%	87.0%	87.7%	88.0%	87.8%	90.0%	89.4%	88.9%	89.2%

Quarterly Percentage Change in GAAP and Cash Same Property Revenues Less Operating Expenses

Summary of GAAP and Cash Rental Rate Increases on Renewed/Released Space

(1) Excluding a lease for 21,310 rentable square feet in the San Francisco Bay market, rental rates for renewed or released space in 2003 were on average 2.5% higher than expiring rates on a cash basis and 9.7% higher than expiring rates on a GAAP basis,

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Summary of Debt
March 31, 2010
(Dollars in thousands)
(Unaudited)

Debt Maturities

	Secured Debt							Unsecured Debt
Year	Our Share		Noncontrolling Interests’ Share		Total Consolidated Secured Debt			Credit Facility			Unsecured Convertible Notes
2010	$	22,045	$	203	$	22,248		$	–		$	–
2011	134,790		284		135,074			541,000		(1)	–
2012	40,817		300		41,117			750,000		(1)	369,961
2013	52,382		318		52,700			–			–
2014	196,106		20,846		216,952			–			217,014
Thereafter	416,748		–		416,748			–			–
Total	$	862,888	$	21,951	$	884,839	(2)	$	1,291,000		$	586,975	(3)

Secured and Unsecured Debt Analysis

	Balance			Percentage of Balance		Weighted Average Interest Rate at End of Period (4)		Weighted Average Remaining Term
Secured Notes Payable	$	884,839	(2)	32.0	%	5.93	%	6.4 Years
Unsecured Line of Credit	541,000			19.6		1.25		1.6 Years	(5)
Unsecured Term Loan	750,000			27.1		5.43		2.6 Years	(5)
Unsecured Convertible Notes	369,961		(3)	13.4		3.70		1.8 Years
Unsecured Convertible Notes	217,014		(3)	7.9		8.00		4.0 Years
Total Debt	$	2,762,814		100.0	%	4.74	%	3.6 Years

(1) Assumes we exercise our sole right to extend the maturity date of our unsecured line of credit from October 2010 to October 2011 and our unsecured term loan from October 2011 to October 2012. Our multi-year capital plan assumes that we will successfully amend and renegotiate our $1.9 billion unsecured credit facility to a significant availability level that will take into account our business needs, including a portion of the total commitment allocated to an unsecured line of credit and an unsecured term loan. See our Annual Report on Form 10-K for the year ended December 31, 2009 for additional disclosures on our unsecured line of credit and unsecured term loan.

(2) Includes unamortized discount of approximately $2.2 million as of March 31, 2010.

(3) Includes unamortized discount of approximately $37.7 million as of March 31, 2010.

(4) Represents the weighted average contractual interest rate as of the end of the period plus the impact of debt premiums/discounts and our interest rate hedge agreements on our secured notes payable, unsecured line of credit and unsecured term loan and the contractual rates of 3.7% and 8% on our unsecured convertible notes. The weighted average interest rate excludes bank fees and amortization of loan fees. See also the “Summary of Interest Rate Hedge Agreements” section of this report.

(5) Assumes we exercise our sole right to extend the maturity date of our unsecured line of credit and unsecured term loan by twelve months to October 2011 and October 2012, respectively. The interest rate related to outstanding borrowings for our unhedged floating rate debt is based upon one-month LIBOR. The interest rate resets periodically and will vary in future periods.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Summary of Secured Debt Principal Maturities Through 2014
March 31, 2010

(Dollars in thousands)

(Unaudited)

Description	Maturity Date	Type	Stated Rate		Effective Rate (1)		Amount

California – San Diego #1	10/1/2010	CMBS	8.23	%	5.71	%	$	13,540
Other scheduled principal repayments/amortization							8,708
2010 Total							$	22,248

California – San Francisco Bay #1	1/3/2011	Bank	1.55	%	1.55	%	$	29,558	(2)
Eastern Massachusetts #1	2/1/2011	Bank	7.52		5.82		5,050
California – San Diego #2	8/2/2011	Not-for-Profit	7.50		7.50		8,500
Eastern Massachusetts #2	10/1/2011	Bank	8.10		5.69		2,237
Suburban Washington, D.C. #1	11/1/2011	CMBS	7.25		5.82		2,978
Suburban Washington, D.C. #2	12/22/2011	Bank	3.57		3.57		76,000		(3)
Other scheduled principal repayments/amortization							10,751
2011 Total							$	135,074

Washington – Seattle #1	1/1/2012	Bank	6.15	% (4)	6.15	%	$	28,500	(2)(5)
Eastern Massachusetts #3	3/1/2012	Insurance Co.	7.14		5.83		1,358
Other scheduled principal repayments/amortization							11,259
2012 Total							$	41,117

California – San Diego #3	3/1/2013	Insurance Co.	6.21	%	6.21	%	$	7,940
Suburban Washington, D.C. #3	9/1/2013	CMBS	6.36		6.36		26,093
California – San Francisco Bay #2	11/16/2013	Other	6.14		6.14		7,527
Other scheduled principal repayments/amortization							11,140
2013 Total							$	52,700

Eastern Massachusetts #4	4/1/2014	Insurance Co.	5.26	%	5.59	%	$	208,457
Washington – Seattle #2	11/18/2014	Other	6.37		6.37		240
Other scheduled principal repayments/amortization							8,255
2014 Total							$	216,952

(1) Represents the contractual interest rate as of the end of the period plus the impact of debt premiums/discounts and interest rate hedge agreements. The effective rate excludes bank fees and amortization of loan fees.

(2) Variable rate loan based on one month LIBOR plus an applicable spread. The interest rate resets periodically and will vary in future periods.

(3) We have ongoing discussions with lenders to extend or refinance the debt secured by this property.

(4) Represents the stated rate of 1.38% as of March 31, 2010 and the impact of an interest rate hedge agreement.

(5) Assumes we exercise our sole right to extend the maturity date of this secured debt from January 1, 2011 to January 1, 2012.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Fixed/Floating Rate Debt and Leverage
(Dollars in thousands, except per share data)
(Unaudited)

Fixed/Floating Rate Debt Analysis

	March 31, 2010		Percentage of Balance		Weighted Average Interest Rate at End of Period (1)		Weighted Average Maturity
Fixed Rate Debt	$	1,412,145	51.1	%	5.75	%	5.0 Years
Floating Rate Debt – Hedged	728,500		26.4		5.75		2.6 Years	(2)
Floating Rate Debt – Unhedged	622,169		22.5		1.27		1.6 Years	(2)
Total Debt	$	2,762,814	100.0	%	4.74	%	3.6 Years	(2)

Leverage

	3/31/2010			12/31/2009			9/30/2009			6/30/2009			3/31/2009
Total debt	$	2,762,814		$	2,746,946		$	2,666,096		$	2,826,584		$	2,830,262
Less: cash, cash equivalents, and restricted cash	(106,812		)	(117,919		)	(128,282		)	(121,996		)	(180,051		)
Net debt	$	2,656,002		$	2,629,027		$	2,537,814		$	2,704,588		$	2,650,211

Adjusted EBITDA – trailing 12 months (3)(4)	$	327,685		$	342,598		$	353,831		$	354,198		$	343,525
Gross Assets (excluding cash and restricted cash)	$	5,900,292		$	5,859,955		$	5,765,820		$	5,641,627		$	5,514,663
Net debt to Adjusted EBITDA – trailing 12 months (3)(4)	8.1			7.7			7.2			7.6			7.7
Net debt to Gross Assets (excluding cash and restricted cash)	45.0%			44.9%			44.0%			47.9%			48.1%
Unencumbered net operating income as a percentage of total net operating income – trailing 12 months	57%			55%			60%			61%			64%
Unencumbered assets gross book value as a percentage of gross assets	71%			70%			69%			69%			69%

(1)	Represents the contractual interest rate as of the end of the period plus the impact of debt premiums/discounts and our interest rate hedge agreements on our secured notes payable, unsecured line of credit, and unsecured term loan and the contractual rates of 3.7% and 8% on our unsecured convertible notes. The weighted average interest rate excludes bank fees and amortization of loan fees. See also the “Summary of Interest Rate Hedge Agreements” section of this report.
(2)	Assumes we exercise our sole right to extend the maturity date of our unsecured line of credit and unsecured term loan by twelve months to October 2011 and October 2012, respectively. The interest rate related to outstanding borrowings for our unhedged floating rate debt is based upon one-month LIBOR. The interest rate resets periodically and will vary in future periods.
(3)	During the second quarter of 2009, we recognized additional income approximating $7.2 million for a cash receipt related to real estate acquired in November 2007. Additionally during the second quarter of 2009, we recognized a gain on early extinguishment of debt of approximately $11.3 million related to the repurchase, in privately negotiated transactions, of approximately $75 million (par value) of our 3.7% unsecured convertible notes.
(4)	During the first quarter of 2009, we recognized approximately $18.5 million of additional rental income related to the modification of a lease in South San Francisco.

See “Definitions and Other Information” section of this report starting on page 36.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Summary of Interest Rate Hedge Agreements

March 31, 2010

(Dollars in thousands)

(Unaudited)

Transaction Date	Effective Date	Termination Date	Interest Pay Rate		Notional Amount		Effective at March 31, 2010

December 2006	December 29, 2006	March 31, 2014	4.990	%	$	50,000	$	50,000
December 2006	January 2, 2007	January 3, 2011	5.003		28,500		28,500
October 2007	October 31, 2007	September 30, 2012	4.546		50,000		50,000
October 2007	October 31, 2007	September 30, 2013	4.642		50,000		50,000
December 2005	January 2, 2008	December 31, 2010	4.768		50,000		50,000
June 2006	June 30, 2008	June 30, 2010	5.325		50,000		50,000
June 2006	June 30, 2008	June 30, 2010	5.325		50,000		50,000
October 2007	July 1, 2008	March 31, 2013	4.622		25,000		25,000
October 2007	July 1, 2008	March 31, 2013	4.625		25,000		25,000
June 2006	October 31, 2008	December 31, 2010	5.340		50,000		50,000
June 2006	October 31, 2008	December 31, 2010	5.347		50,000		50,000
October 2008	September 30, 2009	January 31, 2011	3.119		100,000		100,000
December 2006	November 30, 2009	March 31, 2014	5.015		75,000		75,000
December 2006	November 30, 2009	March 31, 2014	5.023		75,000		75,000
December 2006	December 31, 2010	October 31, 2012	5.015		100,000		–
Total							$	728,500

Interest pay rate represents the interest rate we will pay for one month LIBOR under the applicable interest rate swap agreement. This rate does not include any spread in addition to one month LIBOR that is due monthly as interest expense.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Summary of Occupancy Percentage and Properties

(Dollars in thousands)

(Unaudited)

Summary of Occupancy Percentage

	December 31,
	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	1Q10	Average
Occupancy of operating properties – end of period	96.2%	95.7%	98.4%	99.0%	96.3%	93.9%	95.2%	93.2%	93.1%	93.8%	94.8%	94.1%	94.0%	95.2%
Occupancy including redevelopment properties – end of period	92.9%	91.5%	90.8%	88.6%	89.2%	88.4%	87.0%	87.7%	88.0%	87.8%	90.0%	89.4%	88.9%	89.2%

Summary of Properties

	March 31, 2010									December 31, 2009
	Rentable Square Feet				Number of	Annualized		Occupancy		Occupancy
Markets	Operating	Redevelopment	Development	Total	Properties	Base Rent (1)		Percentage (1) (2)		Percentage (3)
California – San Diego	1,467,228	198,247	–	1,665,475	32	$	40,281	87.4	%	89.2	%
California – San Francisco Bay	1,580,943	–	555,000	2,135,943	22	53,854		95.8		95.4
Eastern Massachusetts	3,168,242	292,750	–	3,460,992	38	113,643		94.9		94.3
New Jersey/Suburban Philadelphia	459,904	–	–	459,904	8	9,302		83.5		88.0
New York City	–	–	310,000	310,000	1	–		–		–
Southeast	741,732	21,191	–	762,923	13	16,144		93.5		93.7
Suburban Washington, D.C.	2,311,760	135,843	–	2,447,603	30	48,863		95.4		94.3
Washington – Seattle	1,090,205	–	–	1,090,205	13	35,609		98.1		99.1
International – Canada	342,394	–	–	342,394	4	8,907		100.0		100.0
Total Properties (Continuing Operations)	11,162,408	648,031	865,000	12,675,439	161	$	326,603	94.0	%	94.1	%

(1)	Represents annualized base rent and occupancy percentages related to our operating properties aggregating 11,162,408 rentable square feet.
(2)	Including spaces undergoing a permanent change in use to life science laboratory space through redevelopment, including the conversion of single-tenancy space to multi-tenancy space or multi-tenancy space to single-tenancy space, occupancy as of March 31, 2010 was 88.9%. See also the “Value Added Activities” section of this report for additional information on our redevelopment program.
(3)	Represents annualized base rent and occupancy percentages related to our operating properties aggregating 10,962,853 rentable square feet. Including spaces undergoing a permanent change in use to life science laboratory space through redevelopment, including the conversion of single-tenancy space to multi-tenancy space or multi-tenancy space to single-tenancy space, occupancy as of December 31, 2009 was 89.4%. See also the “Value Added Activities” section of this report for additional information on our redevelopment program.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Summary of Same Property Comparisons

(Dollars in thousands)

(Unaudited)

	*GAAP Basis*						*Cash Basis*
	Three Months Ended						Three Months Ended
	3/31/2010		3/31/2009		% Change		3/31/2010		3/31/2009		% Change
Revenues	$	95,758	$	96,192	(0.5	)%	$	93,797	$	94,502	(0.7	)%
Operating expenses	25,580		26,553		(3.7	)	25,580		26,553		(3.7	)
Revenues less operating expenses	$	70,178	$	69,639	0.8	%	$	68,217	$	67,949	0.4	%

Quarterly Percentage Change in GAAP and Cash Same Property Revenues Less Operating Expenses

See “Definitions and Other Information” section of this report starting on page 36.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Summary of Leasing Activity

Three Months Ended March 31, 2010

(Unaudited)

TI’s/Lease

Rentable

Rental

Commissions

Average

Number

Square

Expiring

New

Rate

Per

Lease

of Leases

Footage

Rates

Changes

Square Foot

Terms

Leasing Activity

Lease Expirations

Cash Basis

594,955

$28.83

–

GAAP Basis

594,955

$29.62

–

Renewed/Released Space Leased

Cash Basis

348,388

$30.30

$30.51

0.7%

$4.26

4.2 years

GAAP Basis

348,388

$29.82

$30.37

1.8%

$4.26

4.2 years

Developed/Redeveloped/Vacant Space Leased

Cash Basis

215,513

–

$26.83

–

$11.52

8.1 years

GAAP Basis

215,513

–

$29.01

–

$11.52

8.1 years

Month-to-Month Leases in Effect

Cash Basis

21,076

$31.81

$21.09

–

GAAP Basis

21,076

$30.49

$21.09

–

Leasing Activity Summary

Excluding Month-to-Month Leases

Cash Basis

563,901

–

$29.11

–

$7.04

5.7 years

GAAP Basis

563,901

–

$29.85

–

$7.04

5.7 years

Including Month-to-Month Leases

Cash Basis

584,977

–

$28.82

–

GAAP Basis

584,977

–

$29.53

–

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Summary of Leasing Activity

(Unaudited)

	Three Months Ended		Year Ended

	March 31, 2010			December 31, 2009		December 31, 2008		December 31, 2007		December 31, 2006
	GAAP	Cash		GAAP	Cash	GAAP	Cash	GAAP	Cash	GAAP	Cash

Lease Expirations
Rentable Square Footage	594,955	594,955		1,842,597	1,842,597	1,664,944	1,664,944	1,626,033	1,626,033	1,224,143	1,224,143
Expiring Rates	$29.62	$28.83		$30.70	$30.61	$25.52	$26.88	$26.97	$25.98	$22.42	$24.62

Renewed/Released Space
Leased Rentable Square Footage	348,388	348,388		1,188,184	1,188,184	1,254,285	1,254,285	895,894	895,894	704,826	704,826
New Rates	$30.37	$30.51		$27.72	$28.11	$29.34	$28.60	$31.48	$31.41	$23.67	$23.64
Expiring Rates	$29.82	$30.30		$26.78	$28.07	$25.51	$27.08	$28.66	$29.38	$20.74	$21.94
Rental Rate Changes	1.8%	0.7%		3.5%	0.1%	15.0%	5.6%	9.8%	6.9%	14.1%	7.7%

Developed/Redeveloped/Vacant Space Leased
Rentable Square Footage	215,513	215,513		676,163	676,163	906,859	906,859	686,856	686,856	883,503	883,503
New Rates	$29.01	$26.83		$36.00	$33.57	$37.64	$35.04	$33.68	$31.59	$32.89	$31.02

Totals
Rentable Square Footage	563,901	563,901		1,864,347	1,864,347	2,161,144	2,161,144	1,582,750	1,582,750	1,588,329	1,588,329
New Rates	$29.85	$29.11		$30.73	$30.09	$32.82	$31.30	$32.44	$31.49	$28.80	$27.74
TI’s/Lease Commissions per Square Foot	$7.04	$7.04		$5.49	$5.49	$7.23	$7.23	$6.95	$6.95	$5.13	$5.13
Average Lease Terms	5.7 years	5.7 years		4.5 years	4.5 years	5.5 years	5.5 years	5.1 years	5.1 years	6.3 years	6.3 years

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Summary of Lease Expirations

March 31, 2010

(Unaudited)

Year of Lease Expiration	Number of Leases Expiring		Rentable Square Footage (“RSF”) of Expiring Leases		Percentage of Aggregate Total RSF		Annualized Base Rent of Expiring Leases (per RSF)
2010	51	(1)	685,496	(1)	5.8	%	$25.93
2011	80		1,753,855		14.9		27.51
2012	70		1,421,922		12.0		32.88
2013	63		1,133,913		9.6		29.02
2014	48		1,102,628		9.3		28.33
2015	35		699,122		5.9		26.55
2016	20		1,033,893		8.8		31.53
2017	13		684,973		5.8		34.63
2018	11		737,172		6.2		44.29
2019	6		254,703		2.2		34.64

	2010 RSF of Expiring Leases							Annualized Base Rent
Markets	Leased (2)	Targeted for Redevelopment (3)		Negotiating/ Anticipating	Remaining Expiring Leases	Total		of Expiring Leases (per RSF)
California – San Diego	7,941	34,723	(4)	8,504	40,746	91,914		$26.62
California – San Francisco Bay	114,433	–		25,644	67,876	207,953		28.84
Eastern Massachusetts	63,828	–		21,282	56,123	141,233		28.58
New Jersey/Suburban Philadelphia	–	–		–	27,588	27,588		14.98
Southeast	45,403	–		19,546	8,934	73,883		23.06
Suburban Washington, D.C.	2,952	–		4,457	14,446	21,855		15.40
Washington – Seattle	14,187	93,000	(5)	1,989	11,894	121,070		23.47
International – Canada	–	–		–	–	–		–
Total	248,744	127,723		81,422	227,607	685,496	(1)	$25.93
Percentage of expiring leases	36%	19%		12%	33%	100%

	2011 RSF of Expiring Leases						Annualized Base Rent
Markets	Leased (2)	Targeted for Redevelopment (3)		Negotiating/ Anticipating	Remaining Expiring Leases	Total	of Expiring Leases (per RSF)
California – San Diego	56,489	–		30,487	114,996	201,972	$25.88
California – San Francisco Bay	25,508	32,074	(6)	45,608	161,364	264,554	35.05
Eastern Massachusetts	83,561	222,662	(7)	263,357	187,004	756,584	29.96
New Jersey/Suburban Philadelphia	–	–		14,872	19,149	34,021	15.82
Southeast	–	–		25,373	15,302	40,675	18.87
Suburban Washington, D.C.	–	–		151,601	48,207	199,808	22.14
Washington – Seattle	–	181,790	(8)	39,427	35,024	256,241	20.91
International – Canada	–	–		–	–	–	–
Total	165,558	436,526		570,725	581,046	1,753,855	$27.51
Percentage of expiring leases	9%	25%		33%	33%	100%

(1) Excludes seven month-to-month leases for approximately 21,000 rentable square feet.

(2) Represents leases that have been either (a) executed subsequent to March 31, 2010 as a renewal/extension, or (b) leased to another tenant.

(3) We selectively redevelop existing office/warehouse/shell space or newly acquired properties into generic laboratory space that can be leased at higher rental rates to our target life science cluster markets.

(4) Represents a 34,723 rentable square foot core and shell building with no interior improvements targeted for redevelopment into laboratory space.

(5) Represents a 93,000 rentable square foot industrial building targeted for redevelopment into single or multi-tenancy laboratory space.

(6) Represents a 32,074 rentable square foot single-tenancy space targeted for redevelopment into multi-tenancy laboratory space.

(7) Represents a 177,662 rentable square foot office building targeted for redevelopment into single or multi-tenancy laboratory space and a 45,000 rentable square foot single-tenancy space targeted for redevelopment into multi-tenancy laboratory space.

(8) Represents a 60,000 rentable square foot industrial building targeted for redevelopment into single or multi-tenancy laboratory space and a 121,790 rentable square foot office building targeted for redevelopment into single or multi-tenancy laboratory space.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

20 Largest Client Tenants

March 31, 2010

(Unaudited)

					Approximate	Percentage of				Percentage of		Investment Grade Entities
			Remaining Lease		Aggregate	Aggregate		Annualized		Aggregate
		Number	Term in Years		Rentable	Total Square		Base Rent (3)		Annualized		Fitch	Moody’s	S&P Rating	Education/
	Tenant	of Leases	(1)	(2)	Square Feet	Feet		(in thousands)		Base Rent		Rating (4)	Rating (4)	(4)	Research
1	Novartis AG	6	5.9	6.2	442,621	3.7	%	$	26,246	8.0	%	AA	Aa2	AA-	–
2	Roche Holding Ltd	5	7.5	7.8	387,813	3.3		14,850		4.5		AA-	A2	AA-	–
3	GlaxoSmithKline plc	6	5.2	6.2	350,278	3.0		14,456		4.4		A+	A1	A+	–
4	ZymoGenetics, Inc. (5)	2	9.1	9.1	203,369	1.7		8,747		2.7		–	–	–	–
5	United States Government	6	3.4	3.4	308,205	2.6		8,495		2.6		AAA	Aaa	AAA	–
6	Massachusetts Institute of Technology	3	2.2	2.5	178,952	1.5		7,882		2.4		–	Aaa	AAA	ü
7	Gilead Sciences, Inc.	3	8.3	8.6	131,405	1.1		6,810		2.1		–	–	–	–
8	Theravance, Inc. (6)	2	2.0	2.0	170,244	1.4		6,137		1.9		–	–	–	–
9	Pfizer Inc.	2	9.7	9.7	120,140	1.0		5,647		1.7		AA-	A1	AA	–
10	Amylin Pharmaceuticals, Inc.	3	6.2	6.4	158,983	1.3		5,467		1.7		–	–	–	–
11	The Scripps Research Institute	2	6.7	6.6	96,500	0.8		5,193		1.6		–	–	–	ü
12	Forrester Research, Inc.	1	1.5	1.5	145,551	1.2		4,987		1.5		–	–	–	–
13	Alnylam Pharmaceuticals, Inc. (7)	1	6.5	6.5	95,410	0.8		4,466		1.4		–	–	–	–
14	Dyax Corp.	1	1.9	1.9	67,373	0.6		4,361		1.3		–	–	–	–
15	Quest Diagnostics Incorporated	1	6.8	6.8	248,186	2.1		4,341		1.3		BBB+	Baa2	BBB+	–
16	Infinity Pharmaceuticals, Inc.	2	2.8	2.8	67,167	0.6		4,302		1.3		–	��	–	–
17	Johnson & Johnson	2	3.5	2.9	170,451	1.4		3,917		1.2		AAA	Aaa	AAA	–
18	UMass Memorial Health Care, Inc.	6	5.9	5.5	189,722	1.6		3,916		1.2		–	–	–	ü
19	Monsanto Company	3	9.1	10.7	126,409	1.2		3,902		1.2		A+	A2	A+	–
20	Fred Hutchinson Cancer Research Center	2	4.3	4.4	123,322	1.1		3,854		1.2		–	–	–	ü
	Total/Weighted Average:	59	5.6	5.9	3,782,101	32.0	%	$	147,976	45.2	%

(1)	Represents remaining lease term in years based on percentage of leased square feet.
(2)	Represents remaining lease term in years based on percentage of annualized base rent in effect as of March 31, 2010.
(3)	Annualized base rent means the annualized fixed base rental amount in effect as of March 31, 2010 (using rental revenue computed on a straight-line basis in accordance with GAAP).
(4)	Ratings obtained from each respective rating agency (Fitch Ratings, Moody’s Investors Service, and Standard & Poor’s, respectively).
(5)	As of December 31, 2009, Novo A/S owned approximately 30% of ZymoGenetics, Inc.
(6)	As of February 16, 2010, GlaxoSmithKline plc owned approximately 15% of the outstanding stock of Theravance, Inc.
(7)	As of December 31, 2009, Novartis AG owned approximately 13% of the outstanding stock of Alnylam Pharmaceuticals, Inc.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Client Tenant Mix

March 31, 2010

(Unaudited)

	Multinational Pharmaceutical	Institutional: Independent Not-for-Profit/ Universities/Translational Research Entities/Government
Client tenant mix by annualized base rent	·Abbott Laboratories ·Astellas Pharma Inc. ·AstraZeneca plc ·Baxter International Inc. ·Bayer AG ·Bristol-Myers Squibb Company ·Eisai Co., Ltd. ·Eli Lilly and Company ·GlaxoSmithKline plc ·Johnson & Johnson ·Merck & Co., Inc. ·Novartis AG ·Pfizer Inc. ·Roche Holding Ltd ·Sanofi-Aventis	·Bill & Melinda Gates Foundation ·Duke University ·Environmental Protection Agency ·Fred Hutchinson Cancer Research Center ·Massachusetts Institute of Technology ·National Institutes of Health ·Sanford-Burham Medical Research Institute ·The Scripps Research Institute ·University of California, San Francisco ·University of Massachusetts ·UMass Memorial Health Care, Inc. ·University of Washington

	Biotechnology: Public & Private	Medical Device, Life Science Product, Service, and Biofuels
	·Alnylam Pharmaceuticals, Inc. ·Ambrx, Inc. ·Amgen Inc. ·Amylin Pharmaceuticals, Inc. ·Anaphore, Inc. ·Avila Therapeutics, Inc. ·Biogen Idec Inc. ·BrainCells Inc. ·Celegene Corporation ·Fate Therapeutics, Inc. ·Gilead Sciences, Inc. ·Ikaria Holdings, Inc. ·Intellikine, Inc. ·Intercell AG ·MacroGenics, Inc. ·Presidio Pharmaceuticals, Inc. ·Proteostasis Therapeutics, Inc. ·Theravance, Inc. ·Tolerx, Inc. ·ZymoGenetics, Inc.	·Bio-Rad Laboratories, Inc. ·Becton, Dickinson and Company ·Canon U.S. Life Sciences, Inc. ·Laboratory Corporation Of America Holdings ·Life Technologies Corporation ·Monsanto Company ·Pharmaceutical Product Development, Inc. ·Qiagen N.V. ·Quest Diagnostics Incorporated ·Sapphire Energy

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Summary of Additions and Dispositions of Properties

Three Months Ended March 31, 2010

(Dollars in thousands)

(Unaudited)

	Acquisition		Month of	Rentable
Markets	Amount		Acquisition	Square Feet

Additions to Operating Properties:	N/A		N/A	N/A


	Acquisition		Month of	Developable
Markets	Amount		Acquisition	Square Feet

Additions to Land:	N/A		N/A	N/A


	Disposition		Month of	Rentable
Markets	Amount		Disposition	Square Feet

Dispositions:

Washington – Seattle	$	11,780	March	70,647

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Real Estate
March 31, 2010

(Dollars in thousands)

(Unaudited)

	Book Value			Square Footage

Land	$	470,976
Buildings and building improvements	3,290,318
Other improvements	176,582
Rental properties	3,937,876			11,162,408
Less: accumulated depreciation	(538,570		)
Rental properties, net	3,399,306
Land held for future development (1)	294,631			5,115,000
Construction in progress:
Redevelopment	174,734			648,031
Development	353,695			865,000
Preconstruction	503,137			4,649,000
New markets and other projects (2)	295,299			1,091,000
Construction in progress (3)	1,326,865			7,253,031
Investment in unconsolidated real estate entity (4)	34,421			428,000
Real estate, net	5,055,223			23,958,439
Add: accumulated depreciation	538,570
Gross book value of real estate	$	5,593,793		23,958,439

(1) Our objective is to advance preconstruction efforts to reduce the time to deliver projects to prospective tenants. Since all efforts have been advanced to appropriate stages and no further preconstruction activities are ongoing, interest, property taxes, insurance, and other costs are expensed as incurred. Represents land and land improvements (site work and piles for foundation) related to land parcels that have been advanced through entitlement and certain levels of design. Amounts exclude a parcel supporting ground-up development of approximately 442,000 rentable square feet in New York City that we have an option to ground lease for future development, and land parcels supporting ground-up development of 924,000 rentable square feet in Edinburgh, Scotland that we have a long-term right to purchase.

(2) Includes site of future building approximating 410,000 rentable square feet related to our project in New York City and four buildings aggregating 547,000 rentable square feet related to two ground-up development projects in China.

(3) Represents costs related to assets undergoing preconstruction and construction activities including development and redevelopment. Preconstruction activities include entitlements, permitting, design, site work, and other activities prior to commencement of vertical construction of aboveground shell and core. We are required to capitalize interest and other direct project costs during the period an asset is undergoing activities to prepare it for its intended use. Capitalization of interest and other direct project costs cease after a project is substantially complete and ready for its intended use. In addition, should activities necessary to prepare an asset for its intended use cease, interest, taxes, insurance, and certain other costs would be expensed as incurred.

(4) Book value represents our equity investment in a real estate entity that owns a land parcel supporting ground-up development of approximately 428,000 rentable square feet in the Longwood Medical Area of Boston.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Value Added Activities
March 31, 2010

(Unaudited)

The following table summarizes our current and embedded future development and redevelopment square footage including preconstruction projects.

	Square Footage
	Construction in Progress				Investment in
Markets	Redevelopment	Development	Preconstruction	New Markets and Other Projects (1)	Unconsolidated Real Estate Entity		Land		Future Redevelopment		Total Value Added Square Footage

California – San Diego	198,247	–	298,000	–	–		145,000		178,000		819,247

California – San Francisco Bay/ Mission Bay	–	263,000	2,030,000	–	–		290,000		–		2,583,000

California – San Francisco Bay/ So. San Francisco	–	292,000	144,000	–	–		1,051,000		25,000		1,512,000

Eastern Massachusetts	292,750	–	1,669,000	–	428,000		225,000		522,000		3,136,750

Suburban Washington, D.C.	135,843	–	–	–	–		787,000		408,000		1,330,843

Washington – Seattle	–	–	248,000	–	–		1,049,000		318,000		1,615,000

International – Canada	–	–	–	–	–		827,000		–		827,000

Other	21,191	310,000	260,000	1,091,000	–		741,000		222,000		2,645,191

Total	648,031	865,000	4,649,000	1,091,000	428,000	(2)	5,115,000	(3)	1,673,000	(4)	14,469,031

(1)	A component of our business model includes ground-up development projects in new markets and other unique projects. We have two development parcels in China. One development parcel is located in South China where a two-building project aggregating approximately 275,000 rentable square feet is under construction. The second development parcel is located in North China where a two-building project aggregating approximately 272,000 rentable square feet is under construction. Additionally, other projects include construction related to site work, plaza, park and underground parking at the Alexandria CenterTM for Life Science – New York City, a unique one-of-a-kind highly advanced state-of-the-art urban science park in the city and in the adjoining future building approximating 410,000 rentable square feet.
(2)	Represents a parcel supporting approximately 428,000 rentable square feet in the Longwood Medical Area of Boston held by an unconsolidated real estate entity.
(3)	Our objective is to advance preconstruction efforts to reduce the time to deliver projects to prospective tenants. Since all efforts have been advanced to appropriate stages and no further preconstruction activities are ongoing, interest, property taxes, insurance, and other costs are expensed as incurred. Represents land and land improvements (site work and piles for foundation) related to land parcels that have been advanced through entitlement and certain levels of design. Amounts exclude a parcel supporting ground-up development of approximately 442,000 rentable square feet in New York City that we have an option to ground lease for future development, and land parcels supporting ground-up development of 924,000 rentable square feet in Edinburgh, Scotland that we have a long-term right to purchase.
(4)	Square footage related to future redevelopment is included in our operating asset base and represents non-laboratory uses (office, industrial, or warehouse) for future conversion to life science laboratory space.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Value Added Activities
March 31, 2010

(continued)

(Unaudited)

Construction in progress includes the following value added activities (dollars in thousands, except cost per square foot):

Value Added Activities	Amount (1)		Square Feet	Cost per Square Foot

Redevelopment projects	$	174,734	648,031	$	270

Development projects	353,695		865,000	409

Preconstruction projects	503,137		4,649,000	108

New markets and other projects	295,299		1,091,000	271

Total	$	1,326,865	7,253,031	$	183

A key component of our business model is our value added redevelopment and development programs. These programs are focused on providing high quality, generic, and reusable life science laboratory space to meet the real estate requirements of a wide range of clients in the life science industry. Upon completion, each value added project is expected to generate significant revenues and cash flows. Our redevelopment and development projects are generally in locations highly desirable by life science entities which we believe results in higher occupancy levels, longer lease terms, and higher rental income and returns. Redevelopment projects consist of the permanent change in use of office, warehouse, and shell space into generic life science laboratory space, including the conversion of single-tenancy space to multi-tenancy space or multi-tenancy space to single-tenancy space. Our incremental investment in redevelopment projects for the conversion of non-laboratory space to laboratory space generally range from $75 to $150 per square foot depending on the nature of the existing building improvement and laboratory design. Development projects consist of the ground-up development of generic life science laboratory facilities. We also have certain significant value added projects undergoing important and substantial preconstruction activities to bring these assets to their intended use. These critical activities add significant value for future ground-up development (which are projected to yield substantial revenues) and are required for the ultimate vertical construction of buildings.

(1)

Represents costs related to assets undergoing preconstruction and construction activities including development and redevelopment. Preconstruction activities include entitlements, permitting, design, site work, and other activities prior to commencement of vertical construction of aboveground shell and core. We are required to capitalize interest and other direct project costs during the period an asset is undergoing activities to prepare it for its intended use. Capitalization of interest and other direct project costs cease after a project is substantially complete and ready for its intended use. In addition, should activities necessary to prepare an asset for its intended use cease, interest, taxes, insurance, and certain other costs would be expensed as incurred.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Value Added Activities
March 31, 2010

(continued)

(Unaudited)

The following table summarizes total rentable square footage (“RSF”) undergoing redevelopment:

Markets/Submarkets	Placed in Redevelopment	Estimated In-Service Dates	RSF Undergoing Redevelopment	Total Property RSF	Leased	Negotiating/ Committed	Marketing	Redevelopment/Leasing Status

California – San Diego/Torrey Pines	2007	2010	84,504	84,504	–	–	100%	Construction/Marketing; Negotiating

California – San Diego/Torrey Pines	2007	2010	31,927	76,084	74%	–	26%	Construction/74% Leased; Marketing Remainder

California – San Diego/Torrey Pines	2010	2012	81,816	81,816	–	–	100%	Design/Marketing

Eastern Massachusetts/Cambridge	2007	2010	85,091	366,412	61%	39%	–	Construction/Leased; Committed

Eastern Massachusetts/Cambridge	2009	2011	17,114	194,776	–	–	100%	Design/Marketing

Eastern Massachusetts/Suburban	2010	2012	47,500	92,500	–	–	100%	Design/Marketing

Eastern Massachusetts/Suburban	2007	2010	113,045	113,045	–	–	100%	Construction/Marketing

Eastern Massachusetts/Suburban	2008	2010	30,000	30,000	–	–	100%	Design; Construction/Marketing

Southeast/Florida	2006	2010	21,191	44,855	–	14%	86%	Construction/Marketing; Negotiating

Suburban Washington, D.C./Shady Grove	2009	2010	58,632	58,632	100%	–	–	Design; Construction/Leased

Suburban Washington, D.C./Shady Grove	2009	2011	77,211	225,096	–	100%	–	Design/Negotiating for Full Bldg User

			648,031	1,367,720	21%	17%	62%

As of December 31, 2009, our estimated cost to complete was approximately $69 per rentable square foot for the 648,031 rentable square feet undergoing a permanent change in use to life science laboratory space through redevelopment. Our final costs for these projects will ultimately depend on many factors, including construction and infrastructure requirements for each tenant, final lease negotiations, and the amount of costs funded by each tenant.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Value Added Activities
March 31, 2010

(continued)

(Unaudited)

The following table summarizes our properties undergoing ground-up development (dollars in thousands):

Markets/Submarkets	Building Description	Estimated In-Service Dates	Leased	Negotiating/ Committed	Marketing	Rentable Square Feet	Leasing Status

California – San Francisco Bay/Mission Bay	Multi-tenant Bldg. with 3% Retail	2010	71%	29%	–	158,000	158,000 Rentable Square Feet Leased or Committed to UCSF and a Large Cap Life Science Company

California – San Francisco Bay/Mission Bay	Single or Multi-tenant Bldg. with 4% Retail	2011	47%	23%	30%	105,000	49,000 Rentable Square Feet Leased to a Large Cap Life Science Company

California – San Francisco Bay/So. San Francisco	Two Bldgs., Single or Multi-tenant	2010	–	–	100%	162,000	Redesign for Multi-Tenancy at Both Buildings/Marketing

California – San Francisco Bay/So. San Francisco	Single Tenant Bldg.	2010	55%	45%	–	130,000	72,000 Rentable Square Feet Leased to Exelixis Inc.; Negotiating Lease for All Remaining Space

New York – New York City – East Tower	Multi-tenant Bldg. with 6% Retail	2010/2011	53%	42%	5%	310,000	104,000 Rentable Square Feet Leased to Eli Lilly and Company; Leased 60,000 Rentable Square Feet for Restaurant/Food, Conference Center, and Core Services; Current Life Science Laboratory and Office Negotiations for Substantially All Remaining Space

Total Properties Undergoing Ground-Up Development			46%	30%	24%	865,000

As of March 31, 2010, our estimated cost to complete the approximately 865,000 rentable square feet undergoing ground-up development was approximately $139 per rentable square foot. This estimate includes costs related to tenant infrastructure costs, including requirements for executed leases with Eli Lilly and Company, UCSF, and a large cap life science company. This estimate also includes certain costs related to incremental investment by the Company with incremental returns which are beyond the original estimated investment anticipated at the beginning of each project. Our final costs for these projects will ultimately depend on many factors, including construction and infrastructure requirements for each tenant, final lease negotiations, and the amount of costs funded by each tenant.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Summary of Capital Expenditures

(Unaudited)

			Three Months Ended		Year Ended December 31,
	Average (1)		March 31, 2010		2009		2008		2007		2006		2005

Capital expenditures (2):

Major capital expenditures	$	643,000	$	–	$	529,000	$	405,000	$	1,379,000	$	575,000	$	972,000

Recurring capital expenditures	$	1,023,000	$	303,000	$	1,405,000	$	955,000	$	648,000	$	639,000	$	1,278,000

Square feet in asset base	10,776,882		11,754,295		11,740,993		11,770,769		11,476,217		9,790,326		8,128,690

Per square foot:

Major capital expenditures	$	0.06	$	–	$	0.05	$	0.03	$	0.12	$	0.06	$	0.12

Recurring capital expenditures	$	0.09	$	0.03	$	0.12	$	0.08	$	0.06	$	0.07	$	0.16

Tenant improvements and leasing costs:

*Re-tenanted space* (3)

Tenant improvements and leasing costs	$	1,767,000	$	626,000	$	1,475,000	$	3,481,000	$	1,446,000	$	1,370,000	$	324,000

Re-tenanted square feet	298,807		117,733		211,638		505,773		224,767		248,846		130,887

Per square foot	$	5.91	$	5.32	$	6.97	$	6.88	$	6.43	$	5.51	$	2.48

*Renewal space*

Tenant improvements and leasing costs	$	2,123,000	$	859,000	$	3,263,000	$	2,364,000	$	1,942,000	$	957,000	$	778,000

Renewal square feet	740,314		230,655		976,546		748,512		671,127		455,980		666,058

Per square foot	$	2.87	$	3.72	$	3.34	$	3.16	$	2.89	$	2.10	$	1.17

The table above shows the average per square foot property-related capital expenditures, tenant improvements, and leasing costs (excluding capital expenditures and tenant improvements that are recoverable from tenants, revenue-enhancing, or related to properties that have undergone redevelopment).

(1)	Average includes annualized amounts for the three months ended March 31, 2010.
(2)	Property-related capital expenditures include all major capital and recurring capital expenditures except capital expenditures that are recoverable from tenants, revenue-enhancing capital expenditures, or costs related to the redevelopment of a property. Major capital expenditures consist of roof replacements and heavy-duty heating, ventilation, and air conditioning systems that are typically identified and considered at the time a property is acquired.
(3)	Excludes space that has undergone redevelopment before re-tenanting.

ALEXANDRIA REAL ESTATE EQUITIES, INC.

Definitions and Other Information

March 31, 2010

(Unaudited)

This section contains additional information for sections throughout this supplemental information package as well as explanations of certain non-GAAP financial measures in sections of this document and the reasons why management believes these measures provide useful information to investors about our financial condition, results of operations, or liquidity. Additional detail can be found in our most recent annual report on Form 10-K and subsequent quarterly reports on Form 10-Q, as well as other documents filed with or furnished to the SEC from time to time.

Adjusted EBITDA and Adjusted EBITDA Margin

EBITDA represents earnings before interest, taxes, depreciation and amortization (“EBITDA”), a non-GAAP financial measure, and is used as a supplemental measure of operating performance. Adjusted EBITDA is calculated as EBITDA excluding impairments, gains or losses from sales of real estate, gains or losses on early extinguishment of debt, and net stock compensation expenses. We use EBITDA and Adjusted EBITDA as a supplemental measure of our operating performance. We consider Adjusted EBITDA to provide investors relevant and useful information because it permits investors to view income from our operations on an unleveraged basis before the effects of taxes, non-cash depreciation and amortization, impairments, gains or losses from sales of real estate, gains or losses on early extinguishment of debt, and net stock compensation expenses. By excluding interest expense, EBITDA and Adjusted EBITDA allow investors to measure our operating performance independent of our capital structure and indebtedness and, therefore, allow for a more meaningful comparison of our operating performance to that of other companies, both in the real estate industry and in other industries. We believe investors should consider EBITDA and Adjusted EBITDA, in conjunction with net income (the primary measure of our performance) and the other required United States generally accepted accounting principles (“GAAP”) measures of our performance, to improve their understanding of our operating results, and to make more meaningful comparisons of our performance between periods and against other companies. EBITDA and Adjusted EBITDA have limitations as analytical tools and should be used in conjunction with our required GAAP presentations. EBITDA and Adjusted EBITDA do not reflect our historical cash expenditures or future cash requirements for capital expenditures or contractual commitments. While EBITDA and Adjusted EBITDA are relevant and widely used measures of operating performance, it does not represent net income or cash flow from operations as defined by GAAP, and it should not be considered as an alternative to those indicators in evaluating operating performance or liquidity. Further, our computation of EBITDA and Adjusted EBITDA may not be comparable to similar measures reported by other companies.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Definitions and Other Information

March 31, 2010

(Unaudited)

Adjusted EBITDA and Adjusted EBITDA Margin (continued)

The following table reconciles net income to EBITDA and Adjusted EBITDA (dollars in thousands):

	Three Months Ended
	3/31/2010			12/31/2009			9/30/2009		6/30/2009 (1)			3/31/2009 (2)
Net income	$	28,785		$	29,905		$	26,378	$	44,116		$	41,249
Add: Interest expense (3)	17,562			19,452			21,225		21,373			20,222
Add: Depreciation and amortization (3)	29,738			29,004			28,336		29,722			31,446
EBITDA	76,085			78,361			75,939		95,211			92,917
Add: Stock compensation expense	2,731			3,194			4,141		3,694			3,022
Subtract: Gain on sales of property	(24		)	(393		)	–		–			(2,234		)
Subtract: Gain on early extinguishment of debt	–			–			–		(11,254		)	–
Adjusted EBITDA	$	78,792		$	81,162		$	80,080	$	87,651		$	93,705

Total revenues	$	116,487		$	115,125		$	115,826	$	121,039		$	131,559
Adjusted EBITDA margin	68%			70%			69%		72%			71%

(1)	During the second quarter of 2009, we recognized additional income approximating $7.2 million for a cash receipt related to real estate acquired in November 2007. Additionally during the second quarter of 2009, we recognized a gain on early extinguishment of debt of approximately $11.3 million related to the repurchase, in privately negotiated transactions, of approximately $75 million (par value) of our 3.7% unsecured convertible notes.
(2)	During the first quarter of 2009, we recognized approximately $18.5 million of additional rental income related to the modification of a lease in South San Francisco.
(3)	Includes interest expense, depreciation and amortization for assets “held for sale” reflected as discontinued operations (for the periods prior to when such assets were designated as “held for sale”).

Adjusted Funds from Operations

Adjusted Funds from Operations (“AFFO”) is a non-GAAP financial measure we believe is a useful supplemental measure of our performance. We compute AFFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders by adding to or deducting from FFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders (i) recurring and non-recurring capital expenditures required to maintain and re-tenant our properties, (ii) second generation tenant improvements and leasing costs on re-tenanted and renewal space (excludes redevelopment expenditures), (iii) capitalized income from development projects, (iv) gain on early extinguishment of debt, (v) amortization of loan fees, debt premiums/discounts and acquired above and below market leases, (vi) effects of deferred rent and deferred rent on ground leases, (vii) non-cash compensation expense related to restricted stock awards, and (viii) other non-cash income or charges, including impairment charges. AFFO is not intended to represent cash flow for the period, and is only intended to provide an additional measure of performance by adjusting the effect of certain items noted above included in FFO, as well as recurring capital expenditures and leasing costs. We believe that net income attributable to Alexandria Real Estate Equities, Inc.’s common stockholders is the most directly comparable GAAP financial measure to AFFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders. We also believe that AFFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders provides useful performance information to the investment community about our financial position as compared to other REITs since AFFO is a widely reported measure used by other REITs. However, other REITs may use different methodologies for calculating AFFO and, accordingly, our AFFO may not be comparable to other REITs.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Definitions and Other Information (continued)

March 31, 2010

(Unaudited)

Capitalized interest

A key component of our business model is our value added redevelopment and development programs. These programs are focused on providing high quality generic life science laboratory space to meet the real estate requirements and are reusable by various life science industry tenants. Upon completion, each value added project is expected to generate significant revenues and cash flows. Our redevelopment and development projects are generally in locations highly desirable by life science entities which we believe results in higher occupancy levels, longer lease terms, and higher rental income and returns. Redevelopment projects consist of the permanent change in use of office, warehouse, and shell space into generic life science laboratory space, including the conversion of single-tenancy space to multi-tenancy space or multi-tenancy space to single-tenancy space. Development projects consist of the ground-up development of generic life science laboratory facilities. We also have certain significant value added projects undergoing important and substantial preconstruction activities to bring these assets to their intended use. These critical activities add significant value for future ground-up development and are required for the ultimate vertical construction of buildings. Ultimately, these land parcels will provide valuable opportunities for new ground-up construction projects. The projects will provide high quality facilities for the life science industry and will generate significant revenue and cash flows for the Company. We are required to capitalize construction, redevelopment, and development costs, including preconstruction costs, interest, property taxes, insurance, and other costs directly related and essential to the project while activities are ongoing to prepare an asset for its intended use. Capitalized interest for the three months ended March 31, 2010 assuming conversion of our 8% unsecured convertible notes was approximately $19.5 million. The average interest rate for the three months ended March 31, 2010 required for the purpose of calculating capitalization of interest was approximately 5.20%, assuming conversion of our 8% unsecured convertible notes. Capitalized interest assumes the conversion of our 8% unsecured convertible notes for all periods shown except for the three months ended March 31, 2009 since we did not issue the notes until April 2009.

Dividend Payout Ratio

Dividend payout ratio (common stock) is the ratio of the absolute dollar amount of dividends on our common stock (shares of common stock outstanding on the respective record date multiplied by the related dividend per share) to FFO attributable to Alexandria Real Estate Equities, Inc.’s common stockholders on a diluted basis.

Dividend Yield

Dividend yield for the quarter represents the annualized quarter dividend divided by the closing common stock price at the end of the quarter.

Earnings per Share

We account for unvested restricted stock awards which contain nonforfeitable rights to dividends as participating securities and include these securities in the computation of earnings per share pursuant to the two-class method. Under the two-class method, we allocate net income after preferred stock dividends and amounts attributable to noncontrolling interests to common stockholders and unvested restricted stock awards based on their respective participation rights to dividends declared (or accumulated) and undistributed earnings. Diluted earnings per share is computed using the weighted average shares of common stock outstanding determined for the basic earnings per share computation plus the effect of any dilutive securities, including the dilutive effect of stock options using the treasury stock method.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Definitions and Other Information (continued)

March 31, 2010

(Unaudited)

Earnings per Share (continued)

We applied the if-converted method for our 8% unsecured senior convertible notes (“8% Unsecured Convertible Notes”). In applying the if-converted method, conversion is assumed for purposes of calculating diluted earnings per share if the effect would be dilutive to earnings per share. A separate calculation is performed for FFO per share. If the assumed conversion pursuant to the if-converted method is dilutive, diluted earnings per share would be calculated by adding back interest charges applicable to our 8% Unsecured Convertible Notes to the numerator and our 8% Unsecured Convertible Notes would be assumed to have been converted at the beginning of the period presented (if outstanding for the entire period) and the resulting incremental shares associated with the assumed conversion would be included in the denominator. For purposes of calculating diluted earnings per share, the if-converted method was dilutive to diluted earnings per share only for the three months ended June 30, 2009. We did not assess the impact of our 8% Unsecured Convertible Notes for the three months ended March 31, 2009 since we did not issue the notes until April 2009.

EBITDA

See Adjusted EBITDA.

Funds from Operations

GAAP basis accounting for real estate assets utilizes historical cost accounting and assumes real estate values diminish over time. In an effort to overcome the difference between real estate values and historical cost accounting for real estate assets, the Board of Governors of NAREIT established the measurement tool of Funds from Operations (“FFO”). Since its introduction, FFO has become a widely used non-GAAP financial measure among real estate investment trusts (“REITs”). We believe that FFO is helpful to investors as an additional measure of the performance of an equity REIT. We compute FFO in accordance with standards established by the Board of Governors of NAREIT in its April 2002 White Paper (the “White Paper”) and related implementation guidance, which may differ from the methodology for calculating FFO utilized by other equity REITs, and, accordingly, may not be comparable to such other REITs. The White Paper defines FFO as net income (loss) (computed in accordance with GAAP), excluding gains (or losses) from sales, plus real estate related depreciation and amortization, and after adjustments for unconsolidated partnerships and joint ventures.

FFO should not be considered as an alternative to net income (determined in accordance with GAAP) as an indication of financial performance, or to cash flows from operating activities (determined in accordance with GAAP) as a measure of our liquidity, nor is it indicative of funds available to fund our cash needs, including our ability to make distributions.

Gross Assets (excluding cash and restricted cash)

Gross assets (excluding cash and restricted cash) is equal to total assets plus accumulated depreciation, less cash, cash equivalents, and restricted cash.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Definitions and Other Information (continued)

March 31, 2010

(Unaudited)

Investment in Unconsolidated Real Estate Entity

In June 2009, the Financial Accounting Standards Board (the “FASB”) issued new accounting literature with respect to variable interest entities (“VIEs”). The new guidance impacts the consolidation guidance applicable to VIEs and among other things requires a qualitative rather than a quantitative analysis to determine the primary beneficiary of a VIE, continuous assessments of whether a company is the primary beneficiary of a VIE, and enhanced disclosures about a company’s involvement with a VIE. We prospectively adopted the new guidance on January 1, 2010.

In 2007, we formed an entity with a development partner for the purpose of owning, developing, leasing, managing, and operating a development parcel supporting a future building aggregating 428,000 rentable square feet. The development parcel serves as collateral for a non-recourse secured loan due in 2012 with a balance of $38.4 million loan balance as of March 31, 2010 and December 31, 2009. In 2009, the entity entered into an interest rate cap agreement related to the secured note with a notional amount approximating $38.4 million effective May 15, 2009 and terminating on January 3, 2012. The agreement sets a ceiling on one month LIBOR at 2.50% related to the secured note. Prior to the adoption of the new VIE guidance, we determined that the entity qualified as a VIE for which we were also the entity’s primary beneficiary since we would absorb the majority of the entity’s expected losses and receive a majority of the entity’s expected residual returns. As a result, we had consolidated the entity since its inception in 2007. The new VIE literature cites two criteria to determine the primary beneficiary of a VIE, both of which must be met to be deemed the primary beneficiary of a VIE. Upon adoption of the new VIE guidance on January 1, 2010, we determined that we did not meet both criteria since we do not have the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance. The decisions that most significantly impact the VIE’s economic performance require both our consent and that of our partner including all major operating, investing, and financing decisions as well as decisions over major expenditures. Because we share power over the decisions that most significantly impact the VIE’s economic performance, we determined that we are not the primary beneficiary of the VIE. As of January 1, 2010, we prospectively deconsolidated the VIE at its carrying amounts and recorded a corresponding entry to investment in unconsolidated real estate entity pursuant to the equity method. As of March 31, 2010, our investment in the unconsolidated entity was approximately $34.4 million.

Net Debt

Net debt is equal to the sum of secured notes payable, unsecured line of credit, unsecured term loan, and unsecured convertible notes, less cash, cash equivalents, and restricted cash.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Definitions and Other Information (continued)

March 31, 2010

(Unaudited)

Same Property Comparisons

The summary of same property comparisons represents operating data for all properties that were fully operating for the entire periods presented for the quarter periods (the “First Quarter Same Properties”). Same property occupancy for the quarters ended March 31, 2010 and 2009 was 93.2% and 93.5%, respectively.

Revenue less operating expenses computed in accordance with GAAP is total revenue associated with the First Quarter Same Properties (excluding lease termination fees, if any), less property operating expenses. Under GAAP, rental revenue is recognized on a straight-line basis over the respective lease terms. Revenue less operating expenses on a cash basis is total revenue associated with the First Quarter Same Properties (excluding lease termination fees, if any), less property operating expenses, adjusted to exclude the effect of straight-line rent adjustments required by GAAP. Straight-line rent adjustments for the quarters ended March 31, 2010 and 2009 for the First Quarter Same Properties were $1,961,000 and $1,690,000, respectively. We believe that revenue less operating expenses on a cash basis is helpful to investors as an additional measure of operating performance because it eliminates straight-line rent adjustments to rental revenue.

Same property results for 2010 excludes approximately $18.5 million of additional rental income in the first quarter of 2009 in connection with a modification of a lease for one property in the South San Francisco market. The lease with the prior tenant was terminated in order to deliver this building to Roche Holding Ltd under a ten-year lease and this $18.5 million consideration was part of our overall returns for this property. Our same property results assuming additional rental income from the prior lease was amortized over the lease term with Roche Holding Ltd would have been 0.8% and 0.4% on a GAAP and cash basis, respectively.

Fees received from tenants in connection with termination of their leases, if any, are excluded from revenue in the Summary of Same Property Comparisons. As of March 31, 2010, approximately 88% of our leases (on a rentable square footage basis) were triple net leases, requiring tenants to pay substantially all real estate taxes and insurance, common area and other operating expenses, including increases thereto. In addition, approximately 8% of our leases (on a rentable square footage basis) required the tenants to pay a majority of operating expenses.

ALEXANDRIA REAL ESTATE EQUITIES, INC.
Definitions and Other Information (continued)

March 31, 2010

(Unaudited)

Tangible Non-Real Estate Assets

Tangible non-real estate assets include the following as of each period presented (in thousands):

	3/31/2010		12/31/2009		9/30/2009		6/30/2009		3/31/2009
Cash and cash equivalents	$	70,980	$	70,628	$	68,280	$	70,313	$	125,281
Restricted cash	35,832		47,291		60,002		51,683		54,770
Tenant receivables	2,710		3,902		3,789		4,665		5,992
Investments	76,918		72,882		71,080		66,068		64,788
Other tangible non-real estate assets	35,808		32,737		35,925		31,287		32,475
Total tangible non-real estate assets	$	222,248	$	227,440	$	239,076	$	224,016	$	283,306

Total Market Capitalization

Total market capitalization is equal to the sum of outstanding shares of series C preferred stock and common stock multiplied by the related closing price at the end of each period presented, the liquidation value of the series D cumulative convertible preferred stock, and total debt (secured notes payable, unsecured line of credit, unsecured term loan, and unsecured convertible notes less).

Weighted Average Interest Rate for Capitalization

The weighted average interest rate for calculating capitalization of interest required pursuant to GAAP represents a weighted average rate based on the rates applicable to borrowings outstanding during the period and includes the impact of our interest rate hedge agreements, amortization of debt discounts/premiums, and amortization of loan fees. A separate calculation is performed each month to determine our weighted average interest rate for capitalization for the month. The rate will vary each month due to changes in variable interest rates, the outstanding debt balances, the proportion of variable rate debt to fixed rate debt, the amount and terms of effective interest rate hedge agreements, and the amount of loan fee amortization. Unhedged LIBOR-based debt outstanding under our credit facility had a weighted average interest rate of 1.3% and hedged variable rate debt and fixed rate debt had a weighted average interest rate of 5.8% as of March 31, 2010. The weighted average interest rate for capitalization shown on page 16 represents the average rates for each reporting period. This average rate for each reporting period is different than the interest rate in effect as of the balance sheet date for each quarter end (i.e. one point in time as opposed to an average over three months during the quarter) shown on page 20. Additionally, the weighted average interest rate for capitalization shown on page 16 assumes the conversion of our 8% unsecured convertible notes for all periods except for the three months ended March 31, 2009 since we did not issue the notes until April 2009.

Alexandria Real Estate Equities (ARE) 8-KResults of Operations and Financial Condition