HAMBURG MARGARET A 4

What Happened

• Margaret A. Hamburg, a director of Alnylam Pharmaceuticals (ALNY), received equity awards on 2026-05-20 totaling 2,112 units: 671 shares granted and 1,441 derivative awards. Both were recorded at $0.00 per share (award/grant), indicating they are compensatory equity awards rather than purchases.

Key Details

• Transaction date: 2026-05-20; filing date: 2026-05-22 (appears timely within the usual 2-business-day Form 4 window).
• Security/amounts: 671 shares (award) and 1,441 derivative shares (total = 2,112 units); price reported $0.00.
• Transaction code: A (award/grant).
• Shares owned after transaction: not specified in the provided filing excerpt.
• Footnotes:
  • F1: The awards include RSUs under the Second Amended and Restated 2018 Stock Incentive Plan; each RSU converts to one share and will vest in full on the earlier of the first anniversary of the grant or certain retirement/resignation events (with a 90-day lookback condition).
  • F2: Describes vesting for a stock option (vests in full on the earlier of the first anniversary of the grant or certain retirement/resignation events with the same 90-day condition).

Context

• These are compensatory equity awards (RSUs/derivative grants) intended to align the director with shareholder interests; no cash changed hands and no sale or exercise occurred. Derivative awards and RSUs typically convert to shares only upon vesting per the footnoted schedule.