David R. Brennan - 15 May 2025 Form 4 Insider Report for INSMED Inc (INSM)

Role: Director
Signature: /s/ David. R. Brennan, by Michael A. Smith as Attorney-in-fact
Issuer symbol: INSM
Transactions as of: 15 May 2025
Transactions value $: $0
Form type: 4
Date filed: 19 May 2025, 16:57
Previous filing: 15 May 2024
Next filing: 10 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Brennan David R	Director	700 US HIGHWAY 202/206, BRIDGEWATER	/s/ David. R. Brennan, by Michael A. Smith as Attorney-in-fact	2025-05-19	0001609305

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	INSM	Common Stock	Award		+5.06K	+4.15%		127K	15 May 2025	Direct	F1, F2

* 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. The RSUs have a one year cliff vesting period, provided that the director (a) remains a member of the Board of Directors of the issuer on such vesting date, and (b) attends at least 75% of the meetings of the Board of Directors which take place between the grant date and the first anniversary of the grant date.
F2	Each RSU was granted on May 15, 2025 for no consideration.

Content

Represents Restricted Stock Units (RSUs), each representing a contingent right to receive one share of Common Stock. The RSUs have a one year cliff vesting period, provided that the director (a) remains a member of the Board of Directors of the issuer on such vesting date, and (b) attends at least 75% of the meetings of the Board of Directors which take place between the grant date and the first anniversary of the grant date.

Each RSU was granted on May 15, 2025 for no consideration.