On September 29, 2022, Solid Biosciences Inc. entered into an Agreement and Plan of Merger (the Merger Agreement) by and among the company, Greenland Merger Sub LLC, AavantiBio Inc. and, solely in his capacity as equityholder representative, Doug Swirsky. The Merger Agreement provides for the acquisition of AavantiBio by the company through the merger of Transitory Subsidiary into AavantiBio, with AavantiBio surviving as a wholly owned subsidiary of the Company (the Merger). It is expected that, subject to and effective upon the closing of the Merger, Alexander (Bo) Cumbo, the current president of AavantiBio, will be appointed as the president of the company, and Mr. Cumbo and Adam Koppel, Managing Director of Bain Capital Life Sciences, will join the board of directors of the company.

On September 29, 2022, Ilan Ganot notified the company of his intention to resign as the company's president, subject to, and contingent and effective upon, the closing of the Merger. Following the resignation, Mr. Ganot will continue to serve on the Board. On September 29, 2022, Erin Powers Brennan also notified the company of her intention to resign as the company's Chief Legal Officer and Secretary, subject to, and contingent and effective upon, the Effective Date.