UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

August 10, 2017

Date of Report (Date of Earliest Event Reported)

FIRST POTOMAC REALTY TRUST

(Exact Name of Registrant as Specified in Its Charter)

7600 Wisconsin Avenue, 11^th Floor

Bethesda, Maryland 20814

(Address of Principal Executive Offices) (Zip Code)

(301) 986-9200

(Registrant’s Telephone Number, Including Area Code)

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 7.01. Regulation FD Disclosure

On August 10, 2017, First Potomac Realty Trust (the “Company”) issued a press release announcing that on September 26, 2017 it will hold a special meeting of shareholders in connection with the previously announced merger pursuant to the Agreement and Plan of Merger, dated June 27, 2017, by and among the Company, First Potomac Realty Investment Limited Partnership, Government Properties Income Trust (“GOV”), GOV NEW OPPTY REIT and GOV NEW OPPTY LP.

Shareholders are entitled to vote at the special meeting if they owned common shares of the Company as of the close of business on August 21, 2017, the record date for the special meeting.

The information furnished under this Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any filing made by the Company under the Exchange Act or the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing.

Additional Information and Where to Find It

In connection with the proposed merger transaction, the Company expects to file with the Securities and Exchange Commission (the “SEC”) a proxy statement, which proxy statement will be mailed or otherwise disseminated to the Company’s shareholders when it becomes available. The Company also plans to file other relevant documents with the SEC regarding the proposed transaction. INVESTORS ARE URGED TO READ THE PROXY STATEMENT AND OTHER RELEVANT DOCUMENTS FILED WITH THE SEC IF AND WHEN THEY BECOME AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. You may obtain a free copy of the proxy statement (if and when it becomes available) and other relevant documents filed by the Company with the SEC at the SEC’s website at www.sec.gov. Copies of the documents filed by the Company will be available free of charge on its website at www.first-potomac.com, or by directing a written request to First Potomac Realty Trust, 7600 Wisconsin Avenue, 11^th Floor, Bethesda, MD 20814, Attention: Investor Relations.

The Company and its trustees and executive officers may be deemed to be participants in the solicitation of proxies in respect of the proposed merger transaction. You can find information about the Company’s trustees and executive officers in the Company’s definitive proxy statement filed with the SEC on April 6, 2017 in connection with its 2017 Annual Meeting of Shareholders. Additional information regarding the interests of such potential participants will be included in the proxy statement and other relevant documents filed with the SEC if and when they become available. You may obtain free copies of these documents from the Company using the sources indicated above.

Forward-Looking Statements

The forward-looking statements contained in this press release, including statements regarding the proposed merger transaction and the timing of such transaction, are subject to various risks and uncertainties. Although the Company believes the expectations reflected in any forward-looking statements contained herein are based on reasonable assumptions, there can be no assurance that our expectations will be achieved. Forward-looking statements, which are based on certain assumptions and describe future plans, strategies and expectations of the Company, are generally identifiable by use of the words “believe,” “expect,” “intend,” “anticipate,” “estimate,” “project,” or other similar expressions. Such statements involve known and unknown risks, uncertainties, and other factors that may cause the actual results of the Company to differ materially from future results, performance or achievements projected or contemplated in the forward-looking statements. Certain factors include, among others, the ability of the Company to obtain the required shareholder approval to consummate the proposed merger transaction; the satisfaction or waiver of other conditions in the merger agreement; the Company’s or GOV’s ability to consummate the proposed merger transaction; the outcome of the current and any future legal proceedings that have or may be instituted against the Company and others related to the merger agreement; the possibility that the anticipated benefits and synergies from the proposed transaction cannot be fully realized or may take longer to realize than expected; the possibility that costs or difficulties related to the integration of the Company’s and GOV’s operations will be greater than expected; operating costs and business disruption may be greater than expected; the ability of

the Company, GOV, or the combined company to retain and hire key personnel and maintain relationships with providers or other business partners pending the consummation of the transaction; changes in general or regional economic conditions; and the impact of legislative, regulatory and competitive changes and other risk factors detailed in the Company’s Annual Report on Form 10-K and described from time to time in the Company’s filings with the SEC.

The risks set forth above are not exhaustive. Many of these factors are beyond the Company’s ability to control or predict. Forward-looking statements are not guarantees of performance. For forward-looking statements herein, the Company claims the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995. The Company assumes no obligation to update or supplement forward-looking statements that become untrue because of subsequent events. The Company does not intend to, and expressly disclaims any duty to, update or revise the forward-looking statements in this discussion to reflect changes in underlying assumptions or factors, new information, future events or otherwise, after the date hereof, except as may be required by law. In light of these risks and uncertainties, you should not rely upon these forward-looking statements after the date of this communication and should keep in mind that any forward-looking statement made in this discussion, or elsewhere, might not occur.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXHIBIT INDEX