SYNLOGIC, INC. Employment Agreements

Employment Letter Agreement dated April 11, 2018 by and between Synlogic, Inc. and Mary Beth Dooley (Filed With SEC on March 19, 2024)

Amendment to Employment Agreement dated December 26, 2023, by and between the Company and Antoine Awad (Filed With SEC on December 29, 2023)

Amendment to Employment Agreement dated December 26, 2023, by and between the Company and Aoife Brennan (Filed With SEC on December 29, 2023)

Employment Agreement dated as of January 24, 2022, by and between the Company and Michael Jensen (Filed With SEC on March 3, 2022)

Employment Letter Agreement dated November 28, 2018, by and between Synlogic and Antoine Awad (Filed With SEC on March 25, 2021)

Employment Letter Agreement dated July 17, 2019, by and between Synlogic and Richard Riese (Filed With SEC on March 25, 2021)

Employment Agreement, dated as of September 4, 2017, by and between the Company and Andrew W. Gengos (Filed With SEC on October 10, 2017)

[MIRNA THERAPEUTICS LETTERHEAD] AMENDMENT NO. 1 TO THE EMPLOYMENT AGREEMENT (Filed With SEC on September 18, 2015)

FIRST AMENDMENT TO EMPLOYMENT AGREEMENT (Filed With SEC on September 11, 2015)