0001789972 2026-09-13 2026-09-13 0001789972 false 8-K 2026-09-13 CULLINAN THERAPEUTICS, INC. DE 001-39856 81-3879991 One Main Street Suite 1350 Cambridge MA 02142 617 410-4650 false false false false Common Stock, $0.0001 par value per share CGEM NASDAQ false