0001650648 2025-02-28 2025-02-28 0001650648 false 8-K 2025-02-28 4D Molecular Therapeutics Inc. DE 001-39782 47-3506994 5858 HORTON STREET #455 EMERYVILLE CA 94608 510 505-2680 false false false false Common Stock, $0.0001 par value per share FDMT NASDAQ false