Sec Form 4 Filing - KESLER STEVEN D @ CORPORATE OFFICE PROPERTIES TRUST - 2019-07-16

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person KESLER STEVEN D 2. Issuer Name and Ticker or Trading Symbol CORPORATE OFFICE PROPERTIES TRUST [ OFC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 6711 COLUMBIA GATEWAY DRIVE, SUITE 300 3. Date of Earliest Transaction (MM/DD/YY) 07/16/2019 (Street) COLUMBIA, MD21046 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price COPT-Common Shares 07/16/2019 P 7 ( 1 ) A $ 26.97 42,152 ( 2 ) D COPT-Common Shares 10/14/2019 P 6.2 ( 1 ) ( 3 ) A $ 28.98 42,152 ( 2 ) D COPT-Common Shares 01/14/2020 P 6.1 ( 1 ) ( 3 ) A $ 29.71 42,152 ( 2 ) D COPT-Common Shares 04/14/2020 P 7.2 ( 1 ) ( 3 ) A $ 25.38 42,152 ( 2 ) D COPT-Common Shares 07/14/2020 P 7.2 ( 1 ) ( 3 ) A $ 25.91 42,152 ( 2 ) D COPT-Common Shares 10/14/2020 P 7.6 ( 1 ) A $ 24.52 42,152 ( 2 ) D COPT-Common Shares 01/14/2021 P 7.3 ( 1 ) A $ 26.07 42,152 ( 2 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other KESLER STEVEN D 6711 COLUMBIA GATEWAY DRIVE SUITE 300 COLUMBIA, MD21046 X Signatures David L. Finch, by Power of Attorney 03/24/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares purchased by an account of which the reporting person was, at the time of purchase, a joint owner with his adult daughter. The reporting person is no longer a joint owner of such account and thus, as of the date of this report, has no beneficial ownership interest in these shares. ( 2 )Because the reporting person has no beneficial ownership interest in these shares as of the date of this report, these shares are not included in the total shares owned by the reporting person. ( 3 )The purchases by the reporting person on October 14, 2019, January 14, 2020, April 14, 2020 and July 14, 2020 were within six months of the sale by the reporting person on February 14, 2020 of 1,000 common shares at a price per share of $30.00. As a result, such purchases were matchable with such sale under Section 16(b) of the Securities Exchange Act of 1934, as amended. The reporting person has disgorged $70.71 to the issuer, representing the full amount of the profit realized in connection with such short swing transactions.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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