Michael A. Smith - 15 May 2025 Form 4 Insider Report for INSMED Inc (INSM)

Role: Chief Legal Officer
Signature: /s/ Michael A. Smith
Issuer symbol: INSM
Transactions as of: 15 May 2025
Net transactions value: $0
Form type: 4
Filing time: 19 May 2025, 17:05:31 UTC
Previous filing: 15 May 2025
Next filing: 03 Jun 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Smith Michael Alexander	Chief Legal Officer	700 US HIGHWAY 202/206, BRIDGEWATER	/s/ Michael A. Smith	19 May 2025	0001870278

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	INSM	Common Stock	Award	$0	+5,578	+6.1%	$0.000000	97,372	15 May 2025	Direct	F1, F2

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	INSM	Stock Option (right to buy)	Award	$0	+27,100		$0.000000	27,100	15 May 2025	Common Stock	27,100	$67.22	Direct	F3

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

Explanation of Responses:

Id	Content
F1	Represents Restricted Stock Units (RSUs), each representing a contingent right to receive one share of Common Stock, granted pursuant to the Company's Amended and Restated 2019 Incentive Plan, as amended. The RSUs vest as follows: 25% on the first day of the first month following the first anniversary of the date of grant (the Initial Vesting Date) and 25% on each anniversary of the Initial Vesting Date until fully vested.
F2	Each RSU was granted on May 15, 2025 for no consideration.
F3	These stock options were granted under the Company's Amended and Restated 2019 Incentive Plan, as amended. The options become exercisable based on the following vesting schedule: 25% vest on the Initial Vesting Date and an additional 12.5% vest every six months thereafter until fully vested.