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Filing Details

Accession Number:: 0001735276-25-000019
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2025-03-03 16:30:28
Reporting Period:: 2025-02-28

Filing Date:: 2025-03-03
Accepted Time:: 2025-03-03 16:30:28
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1178670	Alnylam Pharmaceuticals Inc.	ALNY	Pharmaceutical Preparations (2834)	770602661

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1886431	Joseph Kevin Fitzgerald	675 West Kendall Street Henri A. Termeer Square Cambridge MA 02142	Cso & Evp, Head Of Research	No	Yes	No	No

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Disposition	2025-02-28	27	$236.51	12,854	No	4	S	Direct
Common Stock	Disposition	2025-02-28	21	$238.33	12,833	No	4	S	Direct
Common Stock	Disposition	2025-02-28	22	$239.18	12,811	No	4	S	Direct
Common Stock	Disposition	2025-02-28	48	$240.32	12,763	No	4	S	Direct
Common Stock	Disposition	2025-02-28	79	$241.51	12,684	No	4	S	Direct
Common Stock	Disposition	2025-02-28	187	$242.44	12,497	No	4	S	Direct
Common Stock	Disposition	2025-02-28	75	$243.23	12,422	No	4	S	Direct
Common Stock	Disposition	2025-02-28	37	$244.11	12,385	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	537	Indirect	by Managed Account

Footnotes

Represents shares automatically sold by the Company on behalf of the reporting person pursuant to a mandatory sell-to-cover provision in the award agreement required to cover minimum statutory tax withholding obligations that became due upon the vesting and settlement of a tranche of restricted stock units granted to the reporting person on February 27, 2023.
The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $236.50 to $237.00. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.
The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $237.72 to $238.72. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.
The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $238.73 to $239.69. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.
The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $239.82 to $240.79. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.
The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $240.85 to $241.85. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.
The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $241.86 to $242.86. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.
The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $242.87 to $243.84. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.
The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $243.90 to $244.32. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.
Reflects shares of ALNY common stock acquired by the Reporting Person under the issuer 401(k) plan as a result of the issuer 401(k) matching contribution program.