X0508 4 2024-02-08 0001650648 4D Molecular Therapeutics, Inc. FDMT 0001834021 Kirn David C/O 4D MOLECULAR THERAPEUTICS INC. 5858 HORTON STREET #455 EMERYVILLE CA 94608 true true false false Chief Executive Officer true Common Stock 2024-02-08 4 S false 92001 27.1282 D 1059153 D Transaction made pursuant to a 10b5-1 trading plan adopted by the Reporting Person on August 17, 2023. The transaction was executed in multiple trades in prices ranging from $26.75 to $27.55, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The reporting person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote. By: /s/ Scott Bizily as Attorney-in-fact David Kirn 2024-02-12