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Filing Details

Accession Number:: 0001735276-25-000034
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2025-03-05 16:22:53
Reporting Period:: 2025-03-03

Filing Date:: 2025-03-05
Accepted Time:: 2025-03-05 16:22:53
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

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2025-03-03	3,871	$0.00	16,256	No	4	A	Direct
Common Stock	Disposition	2025-03-03	204	$242.37	16,052	No	4	S	Direct
Common Stock	Disposition	2025-03-03	224	$243.36	15,828	No	4	S	Direct
Common Stock	Disposition	2025-03-03	151	$244.41	15,677	No	4	S	Direct
Common Stock	Disposition	2025-03-03	111	$245.26	15,566	No	4	S	Direct
Common Stock	Disposition	2025-03-03	45	$246.18	15,521	No	4	S	Direct
Common Stock	Disposition	2025-03-03	4	$247.35	15,517	No	4	S	Direct
Common Stock	Disposition	2025-03-03	1	$248.36	15,516	No	4	S	Direct
Common Stock	Disposition	2025-03-03	465	$242.69	15,051	No	4	S	Direct
Common Stock	Disposition	2025-03-03	487	$243.94	14,564	No	4	S	Direct
Common Stock	Disposition	2025-03-03	219	$245.30	14,345	No	4	S	Direct
Common Stock	Disposition	2025-03-04	121	$239.24	14,224	No	4	S	Direct
Common Stock	Disposition	2025-03-04	328	$240.95	13,896	No	4	S	Direct
Common Stock	Disposition	2025-03-04	324	$241.68	13,572	No	4	S	Direct
Common Stock	Disposition	2025-03-04	71	$242.93	13,501	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	A	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
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 Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (right to buy)	Acquisiton	2025-03-03	7,819	$0.00	7,819	$243.53

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
7,819		2035-03-03	No	4	A	Direct

Reported Non-Derivative Holdings

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

Footnotes

These shares are represented by restricted stock units (RSUs) granted under the Amended and Restated 2018 Stock Incentive Plan. Each RSU represents a contingent right to receive one share of common stock. The RSUs will vest over a three-year period, with one third vesting on each of the first, second and third anniversaries of the grant date, subject to the Reporting Persons continuous service with the Issuer as of each such vesting date.
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 restricted stock units.
The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $241.87 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 $242.89 to $243.88. 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 $244.90. 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 $244.91 to $245.88. 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 $246.00 to $246.71. 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 $247.04 to $247.52. 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.
This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 10, 2024.
The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $242.20 to $242.85. 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 $243.37 to $244.34. 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 $244.80 to $245.74. 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 $238.93 to $239.40. 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 $240.18 to $241.17. 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 $241.40 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.
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.
The stock option vests as to 25% of the shares on the first anniversary of the grant date and the remaining shares vest in equal installments at the end of each successive three-month period thereafter until the fourth anniversary of the grant date, subject to the Reporting Persons continuous service with the Issuer as of each such vesting date.