SYNLOGIC, INC. — Director's Dealing 2025

Oct 31, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SYNLOGIC, INC. (SYBX)
CIK: 0001527599
Period of Report: 2025-10-29

Reporting Person: Dooley Mary Beth (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-10-29	Common Stock	S	157	$1.81	Disposed	12744	Direct

Footnotes

F1: Represents the number of shares sold by the reporting person on October 29, 2025 to cover the tax liability in connection with the vesting of a restricted stock award, vesting on October 28, 2025, that was granted in 2022.