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

September 12, 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.  ☐

On August 24, 2017, First Potomac Realty Trust (the “Company”) filed with the Securities and Exchange Commission (the “SEC”) a definitive proxy statement (the “Definitive Proxy Statement”) with respect to the special meeting of the Company’s shareholders scheduled to be held on September 26, 2017 (the “Special Meeting”) at which shareholders will be asked to, among other things, vote on a proposal to approve the previously announced merger of the Company with GOV NEW OPPTY REIT (“REIT Merger Sub”), a Maryland real estate investment trust and wholly-owned subsidiary of Government Properties Income Trust (“GOV”) (NASDAQ: GOV), a Maryland real estate investment trust, pursuant to the Agreement and Plan of Merger (the “Merger Agreement”), dated June 27, 2017, by and among the Company, First Potomac Realty Investment Limited Partnership, a Delaware limited partnership (the “Company LP” and, together with the Company, the “First Potomac Parties”), GOV, REIT Merger Sub and GOV NEW OPPTY LP, a Delaware limited partnership, majority-owned subsidiary of REIT Merger Sub and wholly-owned subsidiary of GOV (“Partnership Merger Sub” and, together with GOV and REIT Merger Sub, the “GOV Parties”).

As previously disclosed in the Definitive Proxy Statement, three purported federal securities class action lawsuits (collectively, the “Lawsuits”) have been filed against the Company and each of the members of the Board of Trustees of the Company in the United States District Court for the District of Maryland. The first case, Schwartz v. First Potomac Realty Trust, et al., (No. 1:17-cv-2214-CCB), was filed on August 4, 2017; the second case, Sciabacucchi v. First Potomac Realty Trust, et al., (No. 1:17-cv-2245-JKB), was filed on August 8, 2017, and also names the Company LP and the GOV Parties as defendants; and the third case, Geml v. First Potomac Realty Trust, et al., (No. 1:17-cv-2263-CCB), was filed on August 10, 2017. Each lawsuit, which purports to have been brought on behalf of all holders of common shares of beneficial interest of the Company, par value $0.001 per share (the “Common Shares”), generally alleges that the preliminary proxy statement filed by the Company with the SEC on July 31, 2017 failed to disclose material information about the pending merger transaction in violation of the Securities Exchange Act of 1934, as amended. The Schwartz complaint seeks to enjoin the defendants from proceeding with the shareholder vote on the proposed merger transaction or consummating the proposed merger unless and until the Company discloses the allegedly omitted information, in addition to damages allegedly suffered by the plaintiffs as a result of the asserted omissions, as well as attorneys’ fees and expenses. The Sciabacucchi and Geml complaints seek to enjoin the defendants from proceeding with the merger transaction, and seek to compel defendants to disseminate a proxy statement that contains the allegedly omitted information, in addition to rescissory damages, as well as attorneys’ fees and expenses.

The First Potomac Parties and the GOV Parties continue to believe that all allegations in the complaints are without merit, and further believe that no supplemental disclosure is required under applicable laws. However, the Company wishes to make certain supplemental disclosures related to the merger transaction solely for the purpose of mooting the allegations contained in the Lawsuits and avoiding the expense and burden of litigation. Nothing in the supplemental disclosures shall be deemed an admission of the legal necessity or materiality under applicable law of any of the supplemental disclosures.

Important information concerning the merger transaction is set forth in the Definitive Proxy Statement. The Definitive Proxy Statement is amended and supplemented by, and should be read as part of, and in conjunction with, the information set forth in this Current Report on Form 8-K.

SUPPLEMENT TO DEFINITIVE PROXY STATEMENT

The Company has agreed to make the following amended and supplemental disclosures to the Definitive Proxy Statement. This supplemental information should be read in conjunction with the Definitive Proxy Statement, which should be read in its entirety. Page references in the below disclosures are to the Definitive Proxy Statement, and defined terms used but not defined herein have the meanings set forth in the Definitive Proxy Statement. Without admitting in any way that the disclosures below are material or otherwise required by law, the Company makes the following amended and supplemental disclosures:

Based on these financial forecasts and estimates, the Company’s unlevered free cash flows utilized in such analysis were approximately $22.7 million for the nine months ending December 31, 2017 and approximately $19.4 million, $49.7 million, $58.0 million and $76.7 million for the full fiscal years ending December 31, 2018, December 31, 2019, December 31, 2020 and December 31, 2021, respectively.

Present values (as of March 31, 2017) of cash flows and terminal values were then calculated by Wells Fargo Securities using a discount rate range of 8.25% to 9.25% derived from a weighted average cost of capital calculation.

Present values (as of March 31, 2017) of distributable dividends and terminal values were then calculated by Wells Fargo Securities using a selected discount rate range of 10.25% to 11.25% derived from a cost of equity calculation.

In addition to the foregoing unaudited prospective financial information, the Company forecasts reflected a quarterly dividend estimate of $0.10 per share (for the nine months ending December 31, 2017 through the full fiscal year ending December 31, 2019), which estimate was utilized in Wells Fargo Securities’ dividend discount analysis described in “—Opinion of the Company’s Financial Advisor—Financial Analyses—Dividend Discount Analysis.”

Pro Rata Cash NOI, Adjusted EBITDA, FFO, AFFO, FAD and certain other financial data above are “non-GAAP financial measures” as set forth in Item 10(e) of Regulation S-K and should not be considered as alternatives to net income (determined in accordance with GAAP) or as an indication of our performance. None of these non-GAAP measures represents cash generated from operating activities determined in accordance with GAAP, and neither is a measure of liquidity or an indicator of our ability to make cash distributions.

Additional Information and Where to Find It

In connection with the proposed merger transaction contemplated by the Merger Agreement, the Company filed with the SEC, and mailed or otherwise disseminated to the Company’s shareholders, the Definitive Proxy Statement. The Company may file other relevant documents with the SEC regarding the proposed transaction. INVESTORS ARE URGED TO READ THE DEFINITIVE 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 Definitive Proxy Statement 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 was included in the Definitive Proxy Statement and may be included in 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 Current Report on Form 8-K, 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 the Company’s 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; the impact of legislative, regulatory and competitive changes; and other risk factors detailed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 and the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2017 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.

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.