SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(B) OR 12(G) OF THE SECURITIES EXCHANGE ACT OF 1934 Corporate Office Properties Trust -------------------------------------------------------------- (Exact name of Registrant specified in its Charter) Maryland 23-2947217 -------------------------------------------------------------- (State of (IRS Employer Incorporation or Organization) Identification No.) 8815 Centre Park Drive, Suite 400 Columbia, Maryland 21045 -------------------------------------------------------------- (Address of principal Zip Code executive offices) If this Form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A. (c), please check the following box. /X/ If this Form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A. (d), please check the following box. / / Securities Act registration statement file number to which this form relates: 333-71807 --------- SECURITIES TO BE REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT: Title of Each Class Name of Each Exchange on Which TO BE SO REGISTERED EACH CLASS IS TO BE REGISTERED -------------------- ------------------------------ Series E Cumulative Redeemable Preferred Shares of Beneficial Interest, $.01 par value per share New York Stock Exchange - ------------------------------------- ------------------------------ SECURITIES TO BE REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT: None ------------------------------ (Title of class) Item 1. DESCRIPTION OF REGISTRANT'S SECURITIES TO BE REGISTERED ------------------------------------------------------- The description of the Registrant's securities to be registered is incorporated by reference to the preliminary Prospectus Supplement, dated as of March 26, 2001, which was filed on Form 424(b)(2) (File No. 333-71807).