Michael W. Bonney - 18 Aug 2025 Form 4 Insider Report for ALNYLAM PHARMACEUTICALS, INC. (ALNY)

Reporting relationship: Director
Issuer ticker: ALNY
Reported as of: 18 Aug 2025
Net transaction value: -$4,272,750
SEC form: 4
Accepted by SEC: 19 Aug 2025, 17:26:02 UTC
Prior SEC filing: 19 May 2025
Next SEC filing: 18 Mar 2026
Source filing: View source filing
Reporting owner signature: By: Brett Budzinski, Attorney-in-Fact For: Michael W. Bonney

Key filing fact

Michael W. Bonney filed Form 4 for ALNYLAM PHARMACEUTICALS, INC. (ALNY) on 19 Aug 2025.

Key facts

This page summarizes Michael W. Bonney's Form 4 filing for ALNYLAM PHARMACEUTICALS, INC. (ALNY).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 19 Aug 2025, 17:26.

Change

Previous filing in this sequence was filed on 19 May 2025.
Current net transaction value: -$4,272,750.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001219016 Primary reporting owner

BONNEY MICHAEL W

Relationship: Director
Address: 675 WEST KENDALL STREET, HENRI A. TERMEER SQUARE, CAMBRIDGE
Signature: By: Brett Budzinski, Attorney-in-Fact For: Michael W. Bonney
Signature date: 19 Aug 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ALNY transaction

Common Stock

Options Exercise

Transaction value: $789,750
Shares: +11,250
Change %: +67%
Price: $70.20
Shares after: 28,054
Date: 18 Aug 2025
Ownership: Direct
Footnotes: F1

ALNY transaction

Common Stock

Sale

Transaction value: $5,062,500
Shares: -11,250
Change %: -40%
Price: $450.00
Shares after: 16,804
Date: 18 Aug 2025
Ownership: Direct
Footnotes: F1

ALNY holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 4,000
Date: 18 Aug 2025
Ownership: by Trust
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ALNY transaction Derivative

Stock Option (right to buy)

Options Exercise

Transaction value: $0
Shares: -11,250
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 18 Aug 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 11,250
Exercise price: $70.20
Footnotes: F1, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 3 footnotes

Footnote F1

This transaction was made pursuant to a Rule 10b5-1(c) trading plan adopted by the Reporting Person on November 12, 2024.

Footnote F2

The shares of ALNY common stock were purchased by the Michael W. Bonney Revocable Trust, of which the reporting person is trustee.

Footnote F3

The stock option was fully vested as of June 3, 2017.