Management Change/Compensation (Form 8-K)

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

On September 16, 2025, Saqib Islam notified Passage Bio, Inc. (the "Company") of his decision to resign from the Company's Board of Directors (the "Board"), including from the Audit Committee of the Board (the "Audit Committee"), effective immediately (the "Resignation Date"). Mr. Islam's decision was not the result of any disagreement with the Company on any matter relating to its operations, policies or practices.

In connection with Mr. Islam's resignation, the Board appointed Athena Countouriotis, M.D., as a member of the Audit Committee to fill the vacancy left by Mr. Islam, and reduced the size of the Board from eight to seven members, effective as of the Resignation Date.