KELLOGG PETER N 4

4 · ALNYLAM PHARMACEUTICALS, INC. · Filed May 22, 2026

AI-generated summary of this filing

Updated May 22, 2026

Alnylam (ALNY) Director Peter N. Kellogg Receives RSU Awards

What Happened

Peter N. Kellogg, a member of the board of directors of Alnylam Pharmaceuticals (ALNY), received equity awards on May 20, 2026 totaling 2,112 shares: 671 shares (RSUs) and 1,441 shares reported as a derivative award. Both were reported at $0.00 per share (typical for restricted stock unit grants), so no cash was exchanged in these transactions. These are grants/awards (transaction code A).

Key Details

Transaction date: 2026-05-20; Form filed: 2026-05-22 (filed within the standard 2-business-day window).
Grants reported: 671 shares @ $0.00 (RSU) and 1,441 shares @ $0.00 (derivative/contingent award) — total 2,112.
Shares owned after transaction: not specified in this Form 4.
Footnotes: F1 states the 671 shares are RSUs under the 2018 Stock Incentive Plan; each RSU converts to one share and vest in full on the earlier of the first anniversary of the grant or an earlier retirement/resignation only if that retirement/resignation occurs no more than 90 days before the first anniversary. F2 in the filing references vesting terms for a stock option (vesting in full on the earlier of the first anniversary or certain retirement/resignation conditions).
Filing timeliness: timely (no late-file indication).

Context

These awards appear to be standard director equity compensation (restricted stock units/derivative awards) rather than open-market purchases or sales. RSUs are contingent rights to receive shares upon vesting and do not represent immediate cash investment by the insider. Such grants are routine for board service and should be viewed as compensation rather than an explicit buy/sell signal.

Form 4

Period: 2026-05-20

Director

Transactions

Award
Common Stock
[F1]
2026-05-20+671→ 1,446 total
Award
Stock Option (Right to Buy)
[F2]
2026-05-20+1,441→ 1,441 total
Exercise: $298.48From: 2027-05-20Exp: 2036-05-20→ Common Stock (1,441 underlying)

Footnotes (2)

[F1]These shares are represented by restricted stock units (RSUs) granted under the Second Amended and Restated 2018 Stock Incentive Plan. Each RSU represents a contingent right to receive one share of common stock. The RSUs will vest in full upon the earlier of the first anniversary of the grant date and the date of any earlier retirement or resignation of the Reporting Person, provided such date of retirement or resignation occurs no more than 90 days prior to the first anniversary of the grant date.
[F2]The stock option will vest in full upon the earlier of the first anniversary of the grant date and the date of any earlier retirement or resignation of the Reporting Person, provided such date of retirement or resignation occurs no more than 90 days prior to the first anniversary of the grant date.

Signature

Brett Budzinski, Attorney-in-Fact For: Peter N. Kellogg|2026-05-22

1 file