UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

Date of report (Date of earliest event reported) February 9, 2012

CORPORATE OFFICE PROPERTIES TRUST

(Exact name of registrant as specified in its charter)

Maryland		1-14023		23-2947217
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification Number)

6711 Columbia Gateway Drive, Suite 300

Columbia, Maryland 21046

(Address of principal executive offices)

(443) 285-5400

(Registrant’s telephone number, including area code)

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):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 2.02. Results of Operations and Financial Condition

On February 9, 2012, Corporate Office Properties Trust (the “Registrant”) issued a press release relating to its financial results for the three months and year ended December 31, 2011 and, in connection with this release, is making available certain supplemental information pertaining to its properties and operations as of and for the period ended December 31, 2011. The earnings release and supplemental information are included as Exhibit 99.1 to this report and are incorporated herein by reference.

The information included herein, including the exhibits, shall not be deemed “filed” for any purpose, including the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or subject to liabilities of that Section. The information included herein, including the exhibits, shall also not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits

(a) Financial Statements of Businesses Acquired

None

(b) Pro Forma Financial Information

None

(d) Exhibits

Exhibit Number		Exhibit Title
99.1		Corporate Office Properties Trust earnings release and supplemental information for the period ended December 31, 2011, including the press release dated February 9, 2012

SIGNATURES

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.

Dated: February 9, 2012

	CORPORATE OFFICE PROPERTIES TRUST


	By:	/s/ Stephen E. Riffee
	Name:	Stephen E. Riffee
	Title:	Executive Vice President and Chief Financial Officer