Form 4 for INSM INSMED Inc

Accepted 2026-01-06 00:00:00 ET · period of report 2026-01-02 · accession 0001870278-26-000002 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
D	2026-01-06	2026-01-02	INSM	Smith Michael Alexander	CLO	A - Grant	—	+5,293	60.2K	+10%	—
D	2026-01-06	2026-01-02	INSM	Smith Michael Alexander	CLO	A - Grant	$0.00	+27.6K	27.6K	New	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-01-02	A	A	5,293	—	60,195	D	—	—	(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 January 2, 2026 for no consideration.
2	Derivative	Stock Option (right to buy)	2026-01-02	A	A	27,600	$0.00	27,600	D	$177.12 · — to 2036-01-02	27,600 Common Stock	(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.