Exhibit 99.1

BIOMED REALTY TRUST REPORTS THIRD QUARTER 2015 FINANCIAL RESULTS

Q3 Gross Leasing Volume of 1.3 Million SF Drives 734,000 SF of Positive Net Absorption during the Quarter

SAN DIEGO, Calif. – November 5, 2015 – BioMed Realty Trust, Inc. (NYSE: BMR), investing in the highest quality institutional real estate to meet growing demand across the life science industry, today reported funds from operations (FFO) and core FFO (CFFO) per diluted share of $0.44 for the third quarter ended September 30, 2015, driven by the company’s sustained strong leasing, development deliveries and investment acumen.

Third Quarter Highlights

During the third quarter, the company:

Subsequent to the end of the third quarter, the company announced a definitive agreement with affiliates of Blackstone Real Estate Partners VIII, under which Blackstone has agreed to acquire all of the outstanding shares of common stock of the company for $23.75 per share, plus, if the transaction is consummated after January 1, 2016, a per diem amount of approximately $0.003 per share for each day from January 1, 2016 until (but not including) the closing date.

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Third Quarter 2015 Portfolio Update

During the quarter ended September 30, 2015, the company executed 61 leasing transactions totaling approximately 1.3 million square feet of gross leasing, driving positive net absorption for the quarter of approximately 329,000 square feet within the operating portfolio and approximately 404,900 square feet within the development portfolio. As of September 30, 2015, the operating portfolio leased percentage based on square footage improved 240 basis points from the prior quarter, from 91.0% to 93.4%. At quarter end, the active new construction portfolio comprised eight projects totaling approximately 1.9 million square feet, which were collectively 71.6% pre-leased.

Third quarter leasing included:

During the third quarter, the company completed construction and delivered:

Also during the third quarter, the company completed the acquisition of a historical rehabilitation development project in Providence, Rhode Island for an initial investment of approximately $21.4 million. The project is expected to comprise approximately 268,000 square feet and is 100% pre-leased to Brown University and the Rhode Island Board of Education for expected use as office space and a nursing school, in addition to 172 residential units primarily for use by Brown University graduate school students and a 750-space parking garage. The estimated total investment for the development, net of tax credit subsidies, is approximately $185 million.

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In addition, the company acquired the property located at 21 Firstfield Road in Gaithersburg, Maryland for approximately $10.4 million, comprising approximately 52,800 square feet and 100% leased to Novavax through November 2026.

In the quarter, the company recorded a gain of approximately $2.0 million from the sale of its 65 West Watkins Mill Road property in Gaithersburg, Maryland for $7.9 million in gross proceeds. This gain did not impact FFO or CFFO for the quarter.

Subsequent to the end of the third quarter, the company signed new leases with:

Third Quarter 2015 Financial Results

Total revenues for the third quarter were approximately $174.3 million, compared to approximately $168.9 million for the same period in 2014. Rental revenues for the third quarter were approximately $123.3 million, compared to $122.8 million for the same period in 2014.

CFFO and FFO, calculated in accordance with standards established by NAREIT, for the third quarter were $0.44 per diluted share. This amount includes realized gains totaling $15.5 million, or $0.07 per diluted share, net of an allocation of income attributable to noncontrolling interests, primarily from the acquisition of a life science company in which the company held an equity investment. In addition, other revenues included approximately $3.1 million of lease termination income, or $0.01 per diluted share. CFFO and FFO for the same period in 2014 were $0.40 per diluted share.

Adjusted funds from operations (AFFO) was $0.32 per diluted share for the quarter, compared to $0.35 per diluted share for the same period in 2014. The company reported net income attributable to common stockholders for the quarter of approximately $28.2 million, or $0.14 per diluted share, compared to $16.0 million, or $0.08 per diluted share, for the same period in 2014.

Same property net operating income on a cash basis for the three months ended September 30, 2015 declined by 4.0% as compared to the same period a year ago, driven primarily by the impact of previously disclosed lease terminations.

FFO, CFFO and AFFO are supplemental non-GAAP financial measures used in the real estate industry to measure and compare the operating performance of real estate companies. A complete reconciliation containing adjustments from GAAP net income available to common stockholders to FFO, CFFO and AFFO and definitions of terms are included at the end of this release.

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Financing Activity

During the third quarter, the company refinanced the loan secured by the 650 East Kendall Street property, which the company owns through its joint venture with Prudential Real Estate Investors. Under the terms of the new loan, the amount financed was increased to $160 million from approximately $139 million and the applicable credit spread over LIBOR was reduced from 205 basis points to 140 basis points over a new five-year term. The facility matures in August 2020, with two one-year extension options exercisable at the joint venture’s discretion.

Quarterly Distributions

On October 8, 2015, the company announced that it entered into a definitive merger agreement with affiliates of Blackstone Real Estate Partners VIII, under which Blackstone has agreed to acquire all outstanding shares of common stock of BioMed Realty for $23.75 per share. Completion of the transaction is currently expected to occur in the first quarter of 2016 and is contingent upon customary closing conditions, including the approval of the company’s stockholders, who will vote on the transaction at a special meeting on a date to be announced.

BioMed Realty’s board of directors previously declared a third quarter 2015 dividend of $0.26 per share of common stock, which is equivalent to an annualized dividend of $1.04 per common share. The third quarter dividend was paid on October 15, 2015 to stockholders of record at the close of business on September 30, 2015. Pursuant to the terms of the merger agreement with Blackstone, the company will not pay dividends on the common stock for any quarter thereafter, subject to certain exceptions. However, if the proposed merger transaction is completed after January 1, 2016, stockholders will receive a per diem amount of approximately $0.003 per share for each day from January 1, 2016 until, but not including, the closing date.

Supplemental Information

Supplemental operating and financial data are available in the Investor Relations section of the company’s website at www.biomedrealty.com.

Teleconference and Webcast

As a result of the announcement of the company’s proposed merger with Blackstone, BioMed Realty will not be conducting a conference call and webcast to discuss results for the quarter.

About BioMed Realty Trust

BioMed Realty, with its trusted expertise and valuable relationships, delivers optimal real estate solutions for biotechnology and pharmaceutical companies, scientific research institutions, government agencies and other entities involved in the life science industry. BioMed Realty owns or has interests in properties comprising approximately 18.9 million rentable square feet. Additional information is available at www.biomedrealty.com. Follow us on Twitter @biomedrealty.

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Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 based on current expectations, forecasts and assumptions that involve risks and uncertainties that could cause actual outcomes and results to differ materially These forward-looking statements include, among other things, statements about the expected benefits of the proposed merger with affiliates of Blackstone Real Estate Partners VIII (“Blackstone”), the expected timing and completion of the proposed merger with affiliates of Blackstone and the future business, performance and opportunities of BioMed Realty. Forward-looking statements generally can be identified by the use of words such as “anticipate,” “believe,” “estimate,” “expect,” “intend,” “should,” “will,” or similar words intended to identify information that is not historical in nature. These risks and uncertainties include, without limitation: the ability of the company to obtain required stockholder or regulatory approvals required to consummate the proposed merger with affiliates of Blackstone; the satisfaction or waiver of other conditions to closing in the definitive agreement for the proposed merger with affiliates of Blackstone; unanticipated difficulties or expenditures relating to the proposed merger with affiliates of Blackstone; the response of business partners and competitors to the announcement of the proposed merger with affiliates of Blackstone; potential difficulties in employee retention as a result of the announcement and pendency of the proposed merger with affiliates of Blackstone; legal proceedings that have been, or may be, instituted against the company and others related to the proposed merger with affiliates of Blackstone; general risks affecting the real estate industry (including, without limitation, the inability to enter into or renew leases, dependence on tenants’ financial condition, and competition from other developers, owners and operators of real estate); adverse economic or real estate developments in the life science industry or the company’s target markets; risks associated with the availability and terms of financing, the use of debt to fund acquisitions, developments and other investments, and the ability to refinance indebtedness as it comes due; failure to maintain the company’s investment grade credit ratings with the ratings agencies; failure to manage effectively the company’s growth and expansion into new markets, or to complete or integrate acquisitions and developments successfully; reductions in asset valuations and related impairment charges; risks and uncertainties affecting property development and construction; risks associated with tax credits, grants and other subsidies to fund development activities; risks associated with downturns in foreign, domestic and local economies, changes in interest rates and foreign currency exchange rates, and volatility in the securities markets; ownership of properties outside of the United States that subject the company to different and potentially greater risks than those associated with the company’s domestic operations; risks associated with the company’s investments in loans, including borrower defaults and potential principal losses; potential liability for uninsured losses and environmental contamination; risks associated with security breaches and other disruptions to the company’s information technology networks and related systems; risks associated with the company’s potential failure to qualify as a REIT under the Internal Revenue Code of 1986, as amended, and possible adverse changes in tax and environmental laws; and risks associated with the company’s dependence on key personnel whose continued service is not guaranteed. For a further list and description of such risks and uncertainties, see the reports filed by the company with the Securities and Exchange Commission (the “SEC”), including BioMed Realty’s most recent annual report on Form 10-K and quarterly reports on Form 10-Q. Any forward-looking statement speaks only as of the date of this communication. The company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information or developments, future events or otherwise.

Additional Information and Where to Find It

In connection with the proposed merger transaction involving BioMed Realty and affiliates of Blackstone, BioMed Realty will file a proxy statement and other relevant materials with the SEC. This communication does not constitute a solicitation of any vote or proxy from any stockholder of BioMed Realty. INVESTORS ARE URGED TO READ THE PROXY STATEMENT CAREFULLY AND IN ITS ENTIRETY WHEN IT BECOMES AVAILABLE AND ANY OTHER RELEVANT DOCUMENTS OR MATERIALS FILED OR TO BE FILED WITH THE SEC OR INCORPORATED BY REFERENCE IN THE PROXY STATEMENT, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED MERGER. The final proxy statement will be mailed to BioMed Realty stockholders. In addition, the proxy statement and other documents will be available free of charge at the SEC’s internet website, www.sec.gov. When available, the proxy statement and other pertinent documents also may be obtained free of charge at BioMed Realty’s website, www.biomedrealty.com, or by directing a written request to BioMed Realty at 17190 Bernardo Center Drive, San Diego, California 92128, Attention: Secretary.

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Participants in the Solicitation

BioMed Realty and its directors and executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies in respect to the proposed merger with affiliates of Blackstone. Information regarding BioMed Realty’s directors and executive officers is detailed in its proxy statements and annual reports on Form 10-K and quarterly reports on Form 10-Q previously filed with the SEC, each of which can be obtained free of charge from the sources indicated above. Additional information regarding the direct and indirect interests of BioMed Realty’s directors and executive officers in the proposed transaction may be obtained by reading the proxy statement relating to the proposed transaction and other relevant materials when they become available.

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(Financial Tables Follow)

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BIOMED REALTY TRUST, INC.

CONSOLIDATED BALANCE SHEETS

(In thousands, except share data)

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BIOMED REALTY TRUST, INC.

CONSOLIDATED STATEMENTS OF INCOME

(In thousands, except share data)

(Unaudited)

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BIOMED REALTY TRUST, INC.

CONSOLIDATED FUNDS FROM OPERATIONS

(In thousands, except share data)

(Unaudited)

Our FFO and CFFO attributable to common shares and OP units and a reconciliation to net income for the three and nine months ended September 30, 2015 and 2014 (in thousands, except per share and share data) were as follows:

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Our AFFO available to common shares and partnership and LTIP units and a reconciliation of CFFO to AFFO for the three and nine months ended September 30, 2015 and 2014 was as follows:

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