0001009759 2026-04-21 2026-04-21 0001009759 false 8-K 2026-04-21 CAPSTONE GREEN ENERGY HOLDINGS, INC. DE 001-15957 20-1514270 16640 Stagg Street Van Nuys CA 91406 818 734-5300 false false false false Common Stock, par value $0.001 per share CGEH false