Company:  CORPORATE OFFICE PROPERTI ... (OFC)
Form Type:  4
Filing Date:  5/10/2012 
CIK:  0000860546 
Address:  6711 COLUMBIA GATEWAY DRIVE
SUITE 300 
City, State, Zip:  COLUMBIA, Maryland 21046 
Telephone:  (443) 285-5400 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$28.29   		Change: 
-0.16 (-0.56%)  
Trade Time: 
04:05 PM EST   		Market Cap: 
$2.43B
Description of Business
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  FORM 4
    NAME AND TITLE
    NON DERIVATIVE SECURITIES
    DERIVATIVE SECURITIES
    EXPLANATIONS AND REMARKS
    REPORTING OWNERS
    SIGNATURES
BROKERAGE PARTNERS
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