Form 4 for INSM INSMED Inc

Accepted 2026-01-06 00:00:00 ET · period of report 2026-01-02 · accession 0001604019-26-000002 · 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
DM	2026-01-06	2026-01-02	INSM	Bonstein Sara	CFO	A - Grant	—	+11.6K	79.5K	+17%	—
D	2026-01-06	2026-01-02	INSM	Bonstein Sara	CFO	A - Grant	$0.00	+31.3K	31.3K	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	5,645	—	85,148	D	—	—	(F3) Represents 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 in full on February 1, 2029. (F2) Each RSU was granted on January 2, 2026 for no consideration.
2	Common	Common Stock	2026-01-02	A	A	5,998	—	79,503	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.
3	Derivative	Stock Option (right to buy)	2026-01-02	A	A	31,280	$0.00	31,280	D	$177.12 · — to 2036-01-02	31,280 Common Stock	(F4) 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.