Roger Adsett - 10 Aug 2026 Form 4 Insider Report for INSMED Inc (INSM)

Reporting relationship: Chief Operating Officer
Issuer ticker: INSM
Reported as of: 10 Aug 2026
Net transaction value: -$31,964,810
SEC form: 4
Accepted by SEC: 12 Aug 2026, 17:04:30 UTC
Prior SEC filing: 15 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Roger Adsett, by Michael A. Smith as Attorney-in-fact

Key filing fact

Roger Adsett filed Form 4 for INSMED Inc (INSM) on 12 Aug 2026.

Key facts

This page summarizes Roger Adsett's Form 4 filing for INSMED Inc (INSM).
7 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 12 Aug 2026, 17:04.

Change

Previous filing in this sequence was filed on 15 Jun 2026.
Current net transaction value: -$31,964,810.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001685904 Primary reporting owner

Adsett Roger

Relationship: Chief Operating Officer
Address: 700 US HIGHWAY 202/206, BRIDGEWATER
Signature: /s/ Roger Adsett, by Michael A. Smith as Attorney-in-fact
Signature date: 12 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

INSM transaction

Common Stock

Options Exercise

Transaction value
Shares: +82,280
Change %: +83%
Price: $13.67^*
Shares after: 181,024
Date: 10 Aug 2026
Ownership: Direct
Footnotes: F1

INSM transaction

Common Stock

Options Exercise

Transaction value
Shares: +76,600
Change %: +42%
Price: $17.16^*
Shares after: 257,624
Date: 10 Aug 2026
Ownership: Direct

INSM transaction

Common Stock

Options Exercise

Transaction value
Shares: +80,970
Change %: +31%
Price: $30.46^*
Shares after: 338,594
Date: 10 Aug 2026
Ownership: Direct

INSM transaction

Common Stock

Sale

Transaction value: $31,964,810
Shares: -239,850
Change %: -71%
Price: $133.27
Shares after: 98,744
Date: 10 Aug 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

INSM transaction Derivative

Stock Option (right to buy)

Options Exercise

Transaction value
Shares: -82,280
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 10 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 82,280
Exercise price: $13.67
Footnotes: F3

INSM transaction Derivative

Stock Option (right to buy)

Options Exercise

Transaction value
Shares: -76,600
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 10 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 76,600
Exercise price: $17.16
Footnotes: F3

INSM transaction Derivative

Stock Option (right to buy)

Options Exercise

Transaction value
Shares: -80,970
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 10 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 80,970
Exercise price: $30.46
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Includes 141 shares acquired through the Company's 2018 Employee Stock Purchase Plan.

Footnote F2

This is the weighted average sales price representing 239,850 shares sold at prices ranging from $133.00 to $133.51 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.

Footnote F3

The options became exercisable based on the following vesting schedule: 25% vested on the first anniversary of the grant date and an additional 12.5% vested on each sixth month anniversary date thereafter through the fourth anniversary of the date of grant.