COPT DEFENSE PROPERTIES — Director's Dealing 2011

Jun 15, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CORPORATE OFFICE PROPERTIES TRUST (OFC)
CIK: 0000860546
Period of Report: 2011-06-13

Reporting Person: WAESCHE ROGER A JR (President & COO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-06-13	Common Shares	P	5500	$31.5156	Acquired	258460	Direct

Footnotes

F1: Weighted average sale price. Sale prices ranged from 31.2876-31.6700. The reporting person hereby undertakes to supply the Staff, the Issuer, or a security holder of the Issuer with full information regarding the reported transactions