<?xml version="1.0" encoding="UTF-8" ?><!-- Generated on Thu, 16 Apr 2026 03:27:38 -0400--><rss version="2.0">
    <channel>
        <title>COPT Defense Properties (CDP) SEC Filings</title>
        <link>https://investors.copt.com/financial-information/sec-filings/rss</link>
        <description>COPT Defense Properties (CDP) - SEC Filings</description>
        <language>en-us</language>
                                            <image>
                <url>https://d1io3yog0oux5.cloudfront.net/copt/files/theme/images/logo-sm.png</url>
                <title>COPT Defense Properties Logo</title>
                <link></link>
            </image>
                <generator>Equisolve Investor Relations Suite</generator>
        
                            <item>
                <title><![CDATA[ARS - Annual Report to Security Holders]]></title>
                <description><![CDATA[ARS]]></description>
                <link>https://investors.copt.com/financial-information/sec-filings/content/0000860546-26-000020/0000860546-26-000020.pdf</link>
                <pubDate>Mon, 30 Mar 26 17:59:28 -0400</pubDate>
                <guid>https://investors.copt.com/financial-information/sec-filings/content/0000860546-26-000020/0000860546-26-000020.pdf</guid>
                                                                            </item>
                    <item>
                <title><![CDATA[DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material]]></title>
                <description><![CDATA[DEFA14A]]></description>
                <link>https://investors.copt.com/financial-information/sec-filings/content/0000860546-26-000019/0000860546-26-000019.pdf</link>
                <pubDate>Mon, 30 Mar 26 17:50:54 -0400</pubDate>
                <guid>https://investors.copt.com/financial-information/sec-filings/content/0000860546-26-000019/0000860546-26-000019.pdf</guid>
                                                                            </item>
                    <item>
                <title><![CDATA[DEF 14A - Definitive proxy statements]]></title>
                <description><![CDATA[DEF 14A]]></description>
                <link>https://investors.copt.com/financial-information/sec-filings/content/0000860546-26-000017/0000860546-26-000017.pdf</link>
                <pubDate>Mon, 30 Mar 26 17:39:53 -0400</pubDate>
                <guid>https://investors.copt.com/financial-information/sec-filings/content/0000860546-26-000017/0000860546-26-000017.pdf</guid>
                                                                            </item>
                    <item>
                <title><![CDATA[SCHEDULE 13G/A - Statement of Beneficial Ownership by Certain Investors]]></title>
                <description><![CDATA[SCHEDULE 13G/A]]></description>
                <link>https://investors.copt.com/financial-information/sec-filings/content/0000102909-26-000480/0000102909-26-000480.pdf</link>
                <pubDate>Tue, 14 Apr 26 13:56:07 -0400</pubDate>
                <guid>https://investors.copt.com/financial-information/sec-filings/content/0000102909-26-000480/0000102909-26-000480.pdf</guid>
                                                                            </item>
                    <item>
                <title><![CDATA[4 - Statement of changes in beneficial ownership of securities]]></title>
                <description><![CDATA[4]]></description>
                <link>https://investors.copt.com/financial-information/sec-filings/content/0001250536-26-000004/0001250536-26-000004.pdf</link>
                <pubDate>Wed, 04 Mar 26 14:05:11 -0500</pubDate>
                <guid>https://investors.copt.com/financial-information/sec-filings/content/0001250536-26-000004/0001250536-26-000004.pdf</guid>
                                                                            </item>
                    <item>
                <title><![CDATA[4 - Statement of changes in beneficial ownership of securities]]></title>
                <description><![CDATA[4]]></description>
                <link>https://investors.copt.com/financial-information/sec-filings/content/0001169452-26-000004/0001169452-26-000004.pdf</link>
                <pubDate>Tue, 03 Mar 26 17:08:31 -0500</pubDate>
                <guid>https://investors.copt.com/financial-information/sec-filings/content/0001169452-26-000004/0001169452-26-000004.pdf</guid>
                                                                            </item>
                    <item>
                <title><![CDATA[4 - Statement of changes in beneficial ownership of securities]]></title>
                <description><![CDATA[4]]></description>
                <link>https://investors.copt.com/financial-information/sec-filings/content/0002002965-26-000002/0002002965-26-000002.pdf</link>
                <pubDate>Tue, 03 Mar 26 17:05:51 -0500</pubDate>
                <guid>https://investors.copt.com/financial-information/sec-filings/content/0002002965-26-000002/0002002965-26-000002.pdf</guid>
                                                                            </item>
                    <item>
                <title><![CDATA[4 - Statement of changes in beneficial ownership of securities]]></title>
                <description><![CDATA[4]]></description>
                <link>https://investors.copt.com/financial-information/sec-filings/content/0001349211-26-000004/0001349211-26-000004.pdf</link>
                <pubDate>Tue, 03 Mar 26 17:02:19 -0500</pubDate>
                <guid>https://investors.copt.com/financial-information/sec-filings/content/0001349211-26-000004/0001349211-26-000004.pdf</guid>
                                                                            </item>
                    <item>
                <title><![CDATA[4 - Statement of changes in beneficial ownership of securities]]></title>
                <description><![CDATA[4]]></description>
                <link>https://investors.copt.com/financial-information/sec-filings/content/0001965764-26-000002/0001965764-26-000002.pdf</link>
                <pubDate>Tue, 03 Mar 26 16:59:52 -0500</pubDate>
                <guid>https://investors.copt.com/financial-information/sec-filings/content/0001965764-26-000002/0001965764-26-000002.pdf</guid>
                                                                            </item>
                    <item>
                <title><![CDATA[4 - Statement of changes in beneficial ownership of securities]]></title>
                <description><![CDATA[4]]></description>
                <link>https://investors.copt.com/financial-information/sec-filings/content/0001234375-26-000002/0001234375-26-000002.pdf</link>
                <pubDate>Tue, 24 Feb 26 10:41:31 -0500</pubDate>
                <guid>https://investors.copt.com/financial-information/sec-filings/content/0001234375-26-000002/0001234375-26-000002.pdf</guid>
                                                                            </item>
            </channel>
</rss>