144 0001920738 XXXXXXXX LIVE 0001650648 4D MOLECULAR THERAPEUTICS, INC. 001-39782 5858 Horton Street, #455 Emeryville CA 94608 5105052680 SCOTT BIZILY Officer COMMON Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

7312 54108.80 46702467 09/23/2025 NASDAQ Common 09/23/2025 Exercise of Stock Options Issuer N 4905 09/23/2025 Cash Common 11/14/2022 Employee Stock Purchase Plan Issuer N 2407 11/14/2022 Cash Y The securities to be sold were acquired upon the vesting of employee stock purchase plan during the period of 11/14/2022 through 05/14/2023. The securities to be sold will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment will be the dates of exercise/sale. 09/23/2025 06/06/2025 /s/ Scott Patrick Bizily