<SEC-DOCUMENT>0000860546-24-000022-index.html : 20240328
<SEC-HEADER>0000860546-24-000022.hdr.sgml : 20240328
<ACCEPTANCE-DATETIME>20240328151350
ACCESSION NUMBER:		0000860546-24-000022
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20240328
DATE AS OF CHANGE:		20240328

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COPT DEFENSE PROPERTIES
		CENTRAL INDEX KEY:			0000860546
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		ORGANIZATION NAME:           	05 Real Estate & Construction
		IRS NUMBER:				232947217
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14023
		FILM NUMBER:		24798185

	BUSINESS ADDRESS:	
		STREET 1:		6711 COLUMBIA GATEWAY DRIVE
		STREET 2:		SUITE 300
		CITY:			COLUMBIA
		STATE:			MD
		ZIP:			21046
		BUSINESS PHONE:		4432855400

	MAIL ADDRESS:	
		STREET 1:		6711 COLUMBIA GATEWAY DRIVE
		STREET 2:		SUITE 300
		CITY:			COLUMBIA
		STATE:			MD
		ZIP:			21046

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CORPORATE OFFICE PROPERTIES TRUST
		DATE OF NAME CHANGE:	19980514

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CORPORATE OFFICE PROPERTIES TRUST INC
		DATE OF NAME CHANGE:	19980105

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ROYALE INVESTMENTS INC
		DATE OF NAME CHANGE:	19930328
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>a2024cdpproxy-additionalso.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: a2024cdpproxy-additionalso.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>coptdefenseproperties_naxp.jpg
<TEXT>
Document 2 - file: coptdefenseproperties_naxp.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>coptdefenseproperties_naxpa.jpg
<TEXT>
Document 3 - file: coptdefenseproperties_naxpa.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>coptmain.jpg
<TEXT>
Document 4 - file: coptmain.jpg

</DOCUMENT>
</SEC-DOCUMENT>