Sara Bonstein - 02 Jan 2026 Form 4 Insider Report for INSMED Inc (INSM)

Role
Chief Financial Officer
Signature
/s/ Sara Bonstein, by Michael A. Smith as Attorney-in-fact
Issuer symbol
INSM
Transactions as of
02 Jan 2026
Net transactions value
$0
Form type
4
Filing time
06 Jan 2026, 16:08:43 UTC
Previous filing
07 Oct 2025
Next filing
08 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Bonstein Sara Chief Financial Officer 700 US HIGHWAY 202/206, BRIDGEWATER /s/ Sara Bonstein, by Michael A. Smith as Attorney-in-fact 06 Jan 2026 0001604019

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction INSM Common Stock Award +5,998 +8.2% 79,503 02 Jan 2026 Direct F1, F2
transaction INSM Common Stock Award +5,645 +7.1% 85,148 02 Jan 2026 Direct F2, F3

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 +31,280 $0.000000 31,280 02 Jan 2026 Common Stock 31,280 $177.12 Direct F4
* 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 January 2, 2026 for no consideration.
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.
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.

Remarks:

Exhibit List - Exhibit 24 - Power of Attorney