Ausiello Dennis A 4

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

AI-generated summary of this filing

Updated May 22, 2026

Alnylam Director Dennis A. Ausiello Receives RSU Awards

What Happened

Dennis A. Ausiello, a director of Alnylam Pharmaceuticals (ALNY), received equity awards on May 20, 2026: 671 shares granted as restricted stock units (RSUs) and 1,441 shares recorded as a derivative award. Both entries show acquisition at $0.00 in the filing (i.e., awarded, not bought), totaling 2,112 contingent awards.

Key Details

Transaction date: 2026-05-20; Filing date: 2026-05-22 (appears timely — filed two business days after the transaction).
Price reported: $0.00 for both awards (these are grants, not cash purchases).
Shares owned after transaction: Not disclosed in the provided filing.
Footnotes of note:
- F1: The 671 RSUs are contingent rights to receive one share each and will vest in full on the earlier of the first anniversary of the grant or earlier retirement/resignation (only if that retirement/resignation occurs no more than 90 days before the first anniversary).
- F3: The derivative/option-related award will vest on the same timing condition described above.
- F2: Some Alnylam common stock is held in a trust where the reporting person’s spouse is trustee (relates to holdings, not these specific grants).

Context

These entries are awards/grants (A), not open-market purchases or sales — common for director compensation and do not by themselves indicate buying/selling sentiment.
The awards are contingent (RSUs/derivative rights) and will convert to shares only upon vesting per the plan terms noted in the footnotes.

Form 4

Period: 2026-05-20

Director

Transactions

Award
Common Stock
[F1]
2026-05-20+671→ 1,582 total
Award
Stock Option (Right to Buy)
[F3]
2026-05-20+1,441→ 1,441 total
Exercise: $298.48From: 2027-05-20Exp: 2036-05-20→ Common Stock (1,441 underlying)

Holdings

Footnotes (3)

[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 shares of ALNY common stock are held in a trust, of which the reporting person's spouse is the trustee.
[F3]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: Dennis A. Ausiello|2026-05-22

1 file