Summary of CORPORATE OFFICE PROPERTIES TRUST

Item 5.07 Submission of Matters to a Vote of Security Holders

On May 10, 2012, Corporate Office Properties Trust (the "Registrant") held its Annual Meeting of Shareholders. At such meeting, the shareholders voted on proposals relating to:

Ж the election of ten trustees, each for a one-year term;

Ж the ratification of the appointment of PricewaterhouseCoopers LLP as the Registrant's independent registered public accounting firm for the current fiscal year; and

Ж advisory vote to approve the compensation of the Registrant's named executive officers as disclosed in its proxy statement filed on March 29, 2012.

The voting results at the meeting were as follows:

Proposal 1: Election of Trustees

                                      Shares                       Broker
Name of Nominee         Shares For   Withheld    Shares Abstain   Non-Votes
Jay H. Shidler          58,826,381   1,098,291                -   3,988,225
Clay W. Hamlin, III     58,809,904   1,114,768                -   3,988,225
Thomas F. Brady         58,365,127   1,559,545                -   3,988,225
Robert L. Denton        58,869,943   1,054,729                -   3,988,225
Elizabeth A. Hight      58,243,084   1,681,588                    3,988,225
David M. Jacobstein     59,679,755     244,917                -   3,988,225
Steven D. Kesler        58,917,482   1,007,190                -   3,988,225
Richard Szafranski      58,260,252   1,664,420                -   3,988,225
Roger A. Waesche, Jr.   59,504,024     420,648                -   3,988,225
Kenneth D. Wethe        58,903,302   1,021,370                -   3,988,225




                                                 Votes Cast                       Broker
                                              For        Against     Abstain     Non-Votes
Proposal 2: Ratification of the
Appointment of PricewaterhouseCoopers
LLP as Independent Registered Public
Accounting Firm for the Current Fiscal

Year                                       63,482,385     413,348      17,164          N/A




                                                 Votes Cast                        Broker
                                              For         Against     Abstain     Non-Votes
Proposal 3: Advisory Vote to Approve
Compensation of Named Executive

Officers 58,469,138 1,392,455 63,079 3,988,225