X0708 D LIVE 0002161351 EnCap Flatrock Midstream Fund VI-B, L.P. 1826 NORTH LOOP 1604 W., SUITE 200 SAN ANTONIO TX TEXAS 78248 (210) 494-6777 DELAWARE None None Limited Partnership true 2026 N/A ENCAP FLATROCK MIDSTREAM FUND VI-B GP, LLC 1826 NORTH LOOP 1604 W., SUITE 200 SAN ANTONIO TX TEXAS 78248 Promoter General Partner of the Issuer SAMUEL G. PITTS 1826 NORTH LOOP 1604 W., SUITE 200 SAN ANTONIO TX TEXAS 78248 Executive Officer DOUGLAS E. SWANSON, JR. 9651 KATY FREEWAY, SUITE 600 HOUSTON TX TEXAS 77024 Executive Officer Pooled Investment Fund Venture Capital Fund false Decline to Disclose 06b 3C 3C.1 3C.7 false true true true true false 0 Indefinite 0 Indefinite false 0 0 0 0 false EnCap Flatrock Midstream Fund VI-B, L.P. /S/ SAMUEL G. PITTS SAMUEL G. PITTS MANAGER OF THE MANAGING MEMBER OF THE UGP OF THE ISSUER 2026-10-29