Management Change/Compensation (Form 8-K)

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On March 25, 2026, the Board of Directors of 4D Molecular Therapeutics, Inc. (the "Company") appointed Kristian Humer as the Company's Principal Accounting Officer, effective immediately. In this role, Mr. Humer succeeds Ashoo Gupta, who continues to serve as the Company's Vice President, Finance and Controller.

Mr. Humer, age 51, has served as the Company's Chief Financial Officer and Principal Financial Officer since November 2025. Mr. Humer previously served as the Chief Financial Officer at Foghorn Therapeutics, Inc., a biotechnology company, from April 2024 to November 2025. From July 2021 to September 2023, Mr. Humer served as Chief Financial Officer and Chief Business Officer at Viridian Therapeutics, Inc., a biotechnology company. From January 2010 to July 2021, Mr. Humer served in various roles at Citigroup Global Markets Inc., including most recently as Managing Director in the Healthcare Investment Banking Group from December 2016 to July 2021. Mr. Humer holds an MBA degree from Duke University's Fuqua School of Business and a BA (Hons) degree in Accounting & Economics from the University of Reading.