On February 21, 2023 (the “Collaboration Effective Date”), the Board of Directors (the “Board”) of Voyager Therapeutics, Inc. (the “Company”), approved the appointment of Jude Onyia, Ph.D., to serve as a director of the Company, contingent upon and effective as of the closing of the issuance and sale of 4,395,588 shares of common stock of the Company (the “Shares”) to Neurocrine Biosciences, Inc. (“Neurocrine”) in connection with a collaboration and license agreement, by and between the Company and Neurocrine, dated as of January 8, 2023 (the “Collaboration Agreement”), and a stock purchase agreement, by and between the Company and Neurocrine, dated as of January 8, 2023 (the “2023 Stock Purchase Agreement”), and pursuant to the amended and restated investor agreement, by and between the Company and Neurocrine, dated as of January 8, 2023 (the “Amended and Restated Investor Agreement”), in each case, as previously announced. Dr. Onyia was designated as a Class III director to serve until the 2024 annual meeting of the stockholders of the Company. The Company has agreed that it shall cause Dr. Onyia, or another individual designated by Neurocrine, to be nominated for election to the Board when Dr. Onyia's initial term is scheduled to expire.

Dr. Onyia has served as the Chief Scientific Officer of Neurocrine since November 2021 and leads the drug discovery and non-clinical development teams. Dr. Onyia previously served as the Chief Scientific Officer of Capsida Biotherapeutics, Inc., a gene therapy platform company, from June 2021 to November 2021. From January 1995 to September 2014, Dr. Onyia served in various roles of increasing responsibility with Eli Lilly and Company, a pharmaceutical company, including as Vice President of Biotechnology Discovery Research from September 2014 to June 2021. Dr. Onyia holds a B.S. in forest biology from the State University of New York ESF Syracuse and a Ph.D. in cell and molecular biology from the SUNY Health Science Center at Syracuse.