INSMED Inc — Director's Dealing 2024

May 15, 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: INSMED Inc (INSM)
CIK: 0001104506
Period of Report: 2024-05-13

Reporting Person: Smith Michael Alexander (Chief Legal Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-05-13	Common Stock	A	13308	—	Acquired	99672	Direct
2024-05-14	Common Stock	S	5093	$25.40	Disposed	94579	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2024-05-13	Stock Option (right to buy)	$25.83	A	65230	Acquired	2034-05-13	Common Stock (65230)	Direct

Footnotes

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% percent 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 13, 2024 for no consideration.

F3: Shares sold to satisfy withholding tax obligations upon the vesting of RSUs and to cover related broker fees.

F4: This is the weighted average sales price representing 5,093 shares sold at prices ranging from $25.38 to $25.42 per share. The reporting person undertakes to provide to the SEC staff, the issuer, or a security holder of the issuer the number of shares sold at each price within the price range upon request.

F5: 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 through the fourth anniversary of the Initial Vesting Date.