Akshay Vaishnaw - Dec 31, 2021 Form 4 Insider Report for ALNYLAM PHARMACEUTICALS, INC. (ALNY)

Role: President
Signature: By: /s/ Mary Beth DeLena, Attorney-in-Fact For: Akshay K. Vaishnaw
Stock symbol: ALNY
Transactions as of: Dec 31, 2021
Transactions value $: $0
Form type: 4
Date filed: 1/4/2022, 03:04 PM
Previous filing: Dec 23, 2021
Next filing: Feb 25, 2022
SEC: View on sec.gov

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ALNY	Stock Option (right to buy)	Award	$0	+22.4K		$0.00	22.4K	Dec 31, 2021	Common Stock	22.4K	$169.58	Direct	F1

Showing 1 to 1 of 1 entries

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The stock option vests as to 25% of the shares on the 1st anniversary of the date of the stock option grant and as to an additional 6.25% of the shares each successive three month period thereafter.