X0708 D LIVE 0002157784 Callan OS Defense Fund, LP 201 KING OF PRUSSIA RD. SUITE 650 RADNOR PA PENNSYLVANIA 19087 415-590-5870 DELAWARE None None Limited Partnership true 2026 N/A Callan OS Defense Fund GP, LLC 201 King of Prussia Road Suite 650 Radnor PA PENNSYLVANIA 19087 Executive Officer General Partner of the Issuer Douglas Evans 201 King of Prussia Road Suite 650 Radnor PA PENNSYLVANIA 19087 Executive Officer Chief Investment Officer of the General Partner of the Issuer Pooled Investment Fund Other Investment Fund false Decline to Disclose 06b 3C 3C.7 false true true true true false 100000 N/A None None None N/A N/A N/A XX Unknown 00000 All States false Indefinite 0 Indefinite false 0 0 0 0 false Callan OS Defense Fund, LP /s/ Douglas Evans Douglas Evans Chief Investment Officer of the GP of the Issuer 2026-09-30