Alnylam board changes: Bonney and Bertozzi resign; Arbuckle appointed director

ALNYLAM PHARMACEUTICALS, INC.

Mike Bonney and Carolyn Bertozzi resigned from Alnylam board effective Dec 2, 2025; no disagreement with company.
Bertozzi resigned due to election to Eli Lilly board (eff. Dec 8, 2025); will continue as scientific advisor.
Stuart Arbuckle (ex-Vertex COO) elected to board, effective Jan 5, 2026; receives $75K annual cash retainer plus stock.
Board size reduced from 11 to 10 following resignations; Arbuckle serves as Class I director until 2026 annual meeting.
Arbuckle brings commercial and leadership experience from GSK, Amgen, and Vertex; also serves on Rhythm Pharma board.

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