X0708 D LIVE 0002146615 Spark Capital Founders' Fund IX, L.P. 200 CLARENDON STREET 59TH FLOOR BOSTON MA MASSACHUSETTS 02116 617-830-2000 DELAWARE None None Limited Partnership true 2026 N/A Spark Management Partners IX, LLC c/o Spark Capital 200 Clarendon St., 59th Floor Boston MA MASSACHUSETTS 02116 Executive Officer The general partner of the Issuer ("the General Partner") Alex Finkelstein c/o Spark Capital 200 Clarendon St., 59th Floor Boston MA MASSACHUSETTS 02116 Executive Officer Managing Member of the General Partner Fraser Kelton c/o Spark Capital 200 Clarendon St., 59th Floor Boston MA MASSACHUSETTS 02116 Executive Officer Managing Member of the General Partner Jeremy Philips c/o Spark Capital 200 Clarendon St., 59th Floor Boston MA MASSACHUSETTS 02116 Executive Officer Managing Member of the General Partner Santo Politi c/o Spark Capital 200 Clarendon St., 59th Floor Boston MA MASSACHUSETTS 02116 Executive Officer Managing Member of the General Partner Pooled Investment Fund Venture Capital Fund false Not Applicable 06c 3C 3C.1 false 2026-07-30 false true false 0 10119000 10119000 0 false 47 0 0 0 false Spark Capital Founders' Fund IX, L.P. /s/ Alexa Lyons Alexa Lyons Chief Financial Officer 2026-08-04