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  <p align="center" style="border:none;margin:0in 0in .0001pt;padding:0in;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
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  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">UNITED
  STATES<br>
  SECURITIES AND EXCHANGE COMMISSION</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Washington,
  DC&nbsp; 20549</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><hr size="1" width="25%" noshade color="black" align="center"></div>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">FORM&nbsp;8-K</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><hr size="1" width="25%" noshade color="black" align="center"></div>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">CURRENT
  REPORT</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Pursuant
  to Section&nbsp;13 or 15(d)&nbsp;of<br>
  the Securities Exchange Act of 1934</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date of report (Date of
  earliest event reported) <b><font style="font-weight:bold;">May&nbsp;28, 2008 (</font>May&nbsp;22, 2008)</b></font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">CORPORATE
  OFFICE PROPERTIES TRUST</font></b><font size="5" style="font-size:18.0pt;">  </font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact name of registrant
  as specified in its charter)</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div align="center">
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Maryland</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">1-14023</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">23-2947217</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(State or other
    jurisdiction of <br>
    incorporation)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Commission<br>
    File Number)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(IRS Employer<br>
    Identification Number)</font></p>
    </td>
   </tr>
  </table>
  
  </div>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">6711
  Columbia Gateway Drive</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Suite&nbsp;300<br>
  Columbia, Maryland 21046</font></b><font size="2" style="font-size:10.0pt;"><br>
  (Address of principal executive offices)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">(443)
  285-5400</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Registrant&#146;s telephone
  number, including area code)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check the appropriate box below if the Form&nbsp;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):</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">&nbsp;&nbsp;Written
  communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR
  230.425)</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">&nbsp;&nbsp;Soliciting
  material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR
  240.14a-12)</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt 9.0pt;text-autospace:none;text-indent:-9.0pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">&nbsp;&nbsp;Pre-commencement
  communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under the Exchange Act (17
  CFR 240.14d-2(b))</font></p>
  
  <p style="margin:0in 0in .0001pt 9.0pt;text-autospace:none;text-indent:-9.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt 9.0pt;text-autospace:none;text-indent:-9.0pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="2" style="font-size:10.0pt;">&nbsp;&nbsp;Pre-commencement communications pursuant
  to Rule&nbsp;13e-4(c)&nbsp;under the Exchange Act (17 CFR 240.13e-4(c))</font></p>
  
  <div style="border:none;border-bottom:double windowtext 6.0pt;padding:0in 0in 0in 0in;">
  
  <p style="border:none;margin:0in 0in .0001pt 9.0pt;padding:0in;text-autospace:none;text-indent:-9.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  </div>
  
  <p style="margin:0in 0in .0001pt 47.0pt;page-break-after:avoid;text-autospace:none;text-indent:-47.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div style="margin:0in 0in .0001pt;page-break-after:avoid;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='',FILE='C:\JMS\C900107\08-15397-1\task2961987\15397-1-ba.htm',USER='C900107',CD='May 28 10:09 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div style="font-family:Times New Roman;">
  
  <p align="center" style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt 47.0pt;page-break-after:avoid;text-autospace:none;text-indent:-47.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 5.02</font></b><b><font size="1" style="font-size:3.0pt;font-weight:bold;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font></b><b><font size="2" style="font-size:10.0pt;font-weight:bold;">Departure of Directors or Certain
  Officers; Election of Directors; Appointment of Certain</font></b><font size="2" style="font-size:10.0pt;">  </font><b><font size="2" style="font-size:10.0pt;font-weight:bold;">Officers; Compensatory
  Arrangements of Certain Officers.</font></b></p>
  
  <p style="margin:0in 0in .0001pt .5in;page-break-after:avoid;text-autospace:none;text-indent:11.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">At the
  2008 Annual Meeting of Shareholders held on May&nbsp;22, 2008, the shareholders
  of Corporate Office Properties Trust (the &#147;Registrant&#148;) approved the Corporate
  Office Properties Trust 2008 Omnibus Equity and Incentive Plan (the &#147;Plan&#148;),
  under which the Registrant may issue equity-based awards to officers,
  employees, non-employee trustees and any other key persons of the Registrant
  and its subsidiaries.&#160; The Plan provides
  for a maximum of 2,900,000 shares of the Registrant&#146;s common shares of
  beneficial interest to be issued in the form of share options, share
  appreciation rights, deferred share awards, restricted share awards,
  unrestricted share awards, performance shares, dividend equivalent rights and
  other equity-based awards and for the granting of cash-based awards.&#160; A description of the material terms of the
  Plan can be found in the section of the Definitive Proxy Statement on Schedule
  14A filed by the Registrant on April&nbsp;9, 2008 entitled &#147;Proposal 3&#151;Adoption
  of the 2008 Omnibus Equity and Incentive Plan,&#148; in the subsection entitled &#147;Summary
  of the 2008 Plan,&#148; and is incorporated by reference into this Form&nbsp;8-K.</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The
  foregoing summary is qualified in its entirety by reference to the Plan, which
  is filed as Exhibit&nbsp;99.1 to this Form&nbsp;8-K and incorporated herein by
  reference.</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt 47.0pt;page-break-after:avoid;text-autospace:none;text-indent:-47.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item
  5.03</font></b><b><font size="1" style="font-size:3.0pt;font-weight:bold;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font></b><b><font size="2" style="font-size:10.0pt;font-weight:bold;">Amendments to Articles
  of Incorporation or Bylaws; Change in Fiscal Year</font></b></p>
  
  <p style="margin:0in 0in .0001pt 47.0pt;page-break-after:avoid;text-autospace:none;text-indent:-47.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On May&nbsp;27, 2008, the
  Registrant amended Article&nbsp;V, Section&nbsp;5.2 of its Amended and Restated
  Declaration of Trust to eliminate the classification of its Board of
  Trustees.&#160; Prior to completing this
  amendment, Article&nbsp;V, Section&nbsp;5.2 of the Registrant&#146;s Amended and
  Restated Declaration of Trust had provided for the classification of the Board
  of Trustees into three classes and, at each annual meeting of shareholders, the
  members of one class were elected to three-year terms as Trustees.&#160; As a result of the amendment, the
  classification of the Board of Trustees was eliminated, the current term of
  office of each Trustee will end at the Registrant&#146;s 2009 Annual Meeting of
  Shareholders and Trustees will thereafter be elected for one-year terms at each
  annual meeting of shareholders. Furthermore, any Trustee chosen as a result of
  a newly created Trusteeship or to fill a vacancy on the Board of Trustees will
  hold office until the Registrant&#146;s next annual meeting of shareholders.</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The
  foregoing summary is qualified in its entirety by reference to the amendment,
  which is filed as Exhibit&nbsp;3.1 to this Form&nbsp;8-K and incorporated herein
  by reference.</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt 47.0pt;page-break-after:avoid;text-autospace:none;text-indent:-47.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item&nbsp;9.01.
  </font></b><b><font size="2" style="font-size:10.0pt;font-weight:bold;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></b><b><font size="2" style="font-size:10.0pt;font-weight:bold;"> Financial Statements
  and Exhibits.</font></b></p>
  
  <p style="margin:0in 0in .0001pt 47.0pt;page-break-after:avoid;text-autospace:none;text-indent:-47.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt 33.0pt;text-autospace:none;text-indent:-.25in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)&nbsp;</font><font size="2" style="font-size:10.0pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font size="2" style="font-size:10.0pt;"> Exhibits.</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="87%" style="border-collapse:collapse;margin-left:67.5pt;width:87.5%;">
   <tr>
    <td width="10%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:10.76%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Exhibit&nbsp;No.</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.84%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="86%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:86.4%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="10%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:10.76%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3.1</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.84%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="86%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:86.4%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Articles of Amendment of Amended and Restated
    Declaration of Trust</font></p>
    </td>
   </tr>
   <tr>
    <td width="10%" valign="top" style="padding:0in 0in 0in 0in;width:10.76%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.84%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="86%" valign="top" style="padding:0in 0in 0in 0in;width:86.4%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Corporate Office Properties Trust 2008 Omnibus Equity
    and Incentive Plan (1)</font></p>
    </td>
   </tr>
  </table>
  
  <p style="margin:0in 0in .0001pt 135.0pt;text-autospace:none;text-indent:-20.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div style="margin:0in 0in .0001pt;text-autospace:none;"><hr size="1" width="25%" noshade color="black" align="left"></div>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="21%" valign="top" style="padding:0in 0in 0in 0in;width:21.84%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="75%" valign="top" style="padding:0in 0in 0in 0in;width:75.66%;">
    <p style="margin:0in 0in .0001pt .3in;text-autospace:none;text-indent:-.3in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(1)</font><font size="1" style="font-size:3.0pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font><font size="2" style="font-size:10.0pt;">Incorporated herein by reference to
    Annex B to the Definitive Proxy Statement on Schedule 14A filed with the
    Securities and Exchange Commission by Corporate Office Properties Trust on April&nbsp;9,
    2008.</font></p>
    </td>
   </tr>
  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2</font></p>
  
  <div style="margin:0in 0in .0001pt;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='2',FILE='C:\JMS\C900107\08-15397-1\task2961987\15397-1-ba.htm',USER='C900107',CD='May 28 10:09 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div style="font-family:Times New Roman;">
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SIGNATURES</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;text-indent:.25in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">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.</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;text-indent:.25in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Dated: May&nbsp;28, 2008</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="48%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:48.74%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">CORPORATE OFFICE PROPERTIES TRUST</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.24%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="41%" valign="top" style="padding:0in 0in 0in 0in;width:41.5%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.24%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>
    </td>
    <td width="41%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:41.5%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ </font><font size="2" style="font-size:10.0pt;">Randall M. Griffin</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.24%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Name:</font></p>
    </td>
    <td width="41%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:41.5%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Randall M. Griffin</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.24%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Title:</font></p>
    </td>
    <td width="41%" valign="top" style="padding:0in 0in 0in 0in;width:41.5%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">President and Chief Executive Officer</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.24%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="41%" valign="top" style="padding:0in 0in 0in 0in;width:41.5%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.24%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="41%" valign="top" style="padding:0in 0in 0in 0in;width:41.5%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.24%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>
    </td>
    <td width="41%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:41.5%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ </font><font size="2" style="font-size:10.0pt;">Stephen E. Riffee</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.24%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Name:</font></p>
    </td>
    <td width="41%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:41.5%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Stephen E. Riffee</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.24%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Title:</font></p>
    </td>
    <td width="41%" valign="top" style="padding:0in 0in 0in 0in;width:41.5%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Executive Vice President and</font></p>
    </td>
   </tr>
   <tr>
    <td width="51%" valign="top" style="padding:0in 0in 0in 0in;width:51.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.24%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="41%" valign="top" style="padding:0in 0in 0in 0in;width:41.5%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Chief Financial Officer</font></p>
    </td>
   </tr>
  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3</font></p>
  
  <div style="margin:0in 0in .0001pt;page-break-after:avoid;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='3',FILE='C:\JMS\C900107\08-15397-1\task2961987\15397-1-ba.htm',USER='C900107',CD='May 28 10:09 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div style="font-family:Times New Roman;">
  
  <p align="center" style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;page-break-after:avoid;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">EXHIBIT
  INDEX</font></b></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="7%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:7.82%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Exhibit&nbsp;No.</font></b></p>
    </td>
    <td width="4%" valign="bottom" style="padding:0in 0in 0in 0in;width:4.86%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="87%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:87.32%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="7%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:7.82%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3.1</font></p>
    </td>
    <td width="4%" valign="bottom" style="padding:0in 0in 0in 0in;width:4.86%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="87%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:87.32%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Articles of Amendment of Amended and Restated
    Declaration of Trust</font></p>
    </td>
   </tr>
   <tr>
    <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.82%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>
    </td>
    <td width="4%" valign="bottom" style="padding:0in 0in 0in 0in;width:4.86%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="87%" valign="top" style="padding:0in 0in 0in 0in;width:87.32%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Corporate Office Properties Trust 2008 Omnibus
    Equity and Incentive Plan (1)</font></p>
    </td>
   </tr>
  </table>
  
  <p style="margin:0in 0in .0001pt 135.0pt;text-autospace:none;text-indent:-20.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div style="margin:0in 0in .0001pt;text-autospace:none;"><hr size="1" width="25%" noshade color="black" align="left"></div>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="6%" valign="top" style="padding:0in 0in 0in 0in;width:6.42%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="5%" valign="bottom" style="padding:0in 0in 0in 0in;width:5.08%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="88%" valign="top" style="padding:0in 0in 0in 0in;width:88.5%;">
    <p style="margin:0in 0in .0001pt .3in;text-autospace:none;text-indent:-.3in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(1)</font><font size="1" style="font-size:3.0pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font><font size="2" style="font-size:10.0pt;">Incorporated herein by reference to
    Annex B to the Definitive Proxy Statement on Schedule 14A filed with the
    Securities and Exchange Commission by Corporate Office Properties Trust on April&nbsp;9,
    2008.</font></p>
    </td>
   </tr>
  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4</font></p>
  
  <div style="margin:0in 0in .0001pt;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='4',FILE='C:\JMS\C900107\08-15397-1\task2961987\15397-1-ba.htm',USER='C900107',CD='May 28 10:09 2008' -->
  
  
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metadata_documents: [{"type": "8-K", "sequence": "1", "filename": "a08-15397_18k.htm", "description": "8-K", "secsgml_size_bytes": 37644}]
metadata_filer: {"company-data": {"conformed-name": "CORPORATE OFFICE PROPERTIES TRUST", "cik": "0000860546", "assigned-sic": "6798", "irs-number": "232947217", "state-of-incorporation": "MD", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-14023", "film-number": "08862844"}, "business-address": {"street1": "8815 CENTRE PARK DR", "street2": "SUITE 400", "city": "COLUMBIA", "state": "MD", "zip": "21045", "phone": "6105381800"}, "mail-address": {"street1": "8815 CENTRE PARK DR", "street2": "SUITE 400", "city": "COLUMBIA", "state": "MD", "zip": "21045"}, "former-company": [{"former-conformed-name": "CORPORATE OFFICE PROPERTIES TRUST INC", "date-changed": "19980105"}, {"former-conformed-name": "ROYALE INVESTMENTS INC", "date-changed": "19930328"}, {"former-conformed-name": "ROYALE REIT INC", "date-changed": "19600201"}]}
text: 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)
  May 28, 2008 (
  May 22, 2008)
  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 5.02
  Departure of Directors or Certain
  Officers; Election of Directors; Appointment of Certain
  Officers; Compensatory
  Arrangements of Certain Officers.
  At the
  2008 Annual Meeting of Shareholders held on May 22, 2008, the shareholders
  of Corporate Office Properties Trust (the "Registrant") approved the Corporate
  Office Properties Trust 2008 Omnibus Equity and Incentive Plan (the "Plan"),
  under which the Registrant may issue equity-based awards to officers,
  employees, non-employee trustees and any other key persons of the Registrant
  and its subsidiaries.  The Plan provides
  for a maximum of 2,900,000 shares of the Registrant's common shares of
  beneficial interest to be issued in the form of share options, share
  appreciation rights, deferred share awards, restricted share awards,
  unrestricted share awards, performance shares, dividend equivalent rights and
  other equity-based awards and for the granting of cash-based awards.  A description of the material terms of the
  Plan can be found in the section of the Definitive Proxy Statement on Schedule
  14A filed by the Registrant on April 9, 2008 entitled "Proposal 3—Adoption
  of the 2008 Omnibus Equity and Incentive Plan," in the subsection entitled "Summary
  of the 2008 Plan," and is incorporated by reference into this Form 8-K.
  The
  foregoing summary is qualified in its entirety by reference to the Plan, which
  is filed as Exhibit 99.1 to this Form 8-K and incorporated herein by
  reference.
  Item
  5.03
  Amendments to Articles
  of Incorporation or Bylaws; Change in Fiscal Year
  On May 27, 2008, the
  Registrant amended Article V, Section 5.2 of its Amended and Restated
  Declaration of Trust to eliminate the classification of its Board of
  Trustees.  Prior to completing this
  amendment, Article V, Section 5.2 of the Registrant's Amended and
  Restated Declaration of Trust had provided for the classification of the Board
  of Trustees into three classes and, at each annual meeting of shareholders, the
  members of one class were elected to three-year terms as Trustees.  As a result of the amendment, the
  classification of the Board of Trustees was eliminated, the current term of
  office of each Trustee will end at the Registrant's 2009 Annual Meeting of
  Shareholders and Trustees will thereafter be elected for one-year terms at each
  annual meeting of shareholders. Furthermore, any Trustee chosen as a result of
  a newly created Trusteeship or to fill a vacancy on the Board of Trustees will
  hold office until the Registrant's next annual meeting of shareholders.
  The
  foregoing summary is qualified in its entirety by reference to the amendment,
  which is filed as Exhibit 3.1 to this Form 8-K and incorporated herein
  by reference.
  Item 9.01.
  Financial Statements
  and Exhibits.
  (d)
  Exhibits.
  Exhibit No.
  Description
  3.1
  Articles of Amendment of Amended and Restated
    Declaration of Trust
  99.1
  Corporate Office Properties Trust 2008 Omnibus Equity
    and Incentive Plan (1)
  (1)
  Incorporated herein by reference to
    Annex B to the Definitive Proxy Statement on Schedule 14A filed with the
    Securities and Exchange Commission by Corporate Office Properties Trust on April 9,
    2008.
  2
  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: May 28, 2008
  CORPORATE OFFICE PROPERTIES TRUST
  By:
  /s/
  Randall M. Griffin
  Name:
  Randall M. Griffin
  Title:
  President and Chief Executive Officer
  By:
  /s/
  Stephen E. Riffee
  Name:
  Stephen E. Riffee
  Title:
  Executive Vice President and
  Chief Financial Officer
  3
  EXHIBIT
  INDEX
  Exhibit No.
  Description
  3.1
  Articles of Amendment of Amended and Restated
    Declaration of Trust
  99.1
  Corporate Office Properties Trust 2008 Omnibus
    Equity and Incentive Plan (1)
  (1)
  Incorporated herein by reference to
    Annex B to the Definitive Proxy Statement on Schedule 14A filed with the
    Securities and Exchange Commission by Corporate Office Properties Trust on April 9,
    2008.
  4