AVROBIO, Inc. elected Phillip B. Donenberg to the Board of Directors of the Company, effective June 20, 2018 immediately following the effectiveness of the Registration Statement. Also as previously disclosed in the Registration Statement, Mr. Donenberg became the Chair of the Company’s Audit Committee of the Board. Mr. Donenberg will serve as a Class III director, to serve until the Company’s annual meeting of stockholders following December 31, 2021, or until his successor is duly elected and qualified or his earlier resignation or removal.