Roger Adsett - 01 Apr 2026 Form 4 Insider Report for INSMED Inc (INSM)

Reporting relationship: Chief Operating Officer
Issuer ticker: INSM
Reported as of: 01 Apr 2026
Net transaction value: -$14,497,651
SEC form: 4
Accepted by SEC: 03 Apr 2026, 16:07:37 UTC
Prior SEC filing: 04 Feb 2026
Next SEC filing: 15 May 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 03 Apr 2026.

Key facts

This page summarizes Roger Adsett's Form 4 filing for INSMED Inc (INSM).
5 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 03 Apr 2026, 16:07.

Change

Previous filing in this sequence was filed on 04 Feb 2026.
Current net transaction value: -$14,497,651.

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: 03 Apr 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: +88,060
Change %: +82%
Price: $14.56^*
Shares after: 194,870
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F1

INSM transaction

Common Stock

Sale

Transaction value: $1,095,754
Shares: -6,715
Change %: -3.4%
Price: $163.18
Shares after: 188,155
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F1, F2

INSM transaction

Common Stock

Sale

Transaction value: $3,118,254
Shares: -19,001
Change %: -10%
Price: $164.11
Shares after: 169,154
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F1, F3

INSM transaction

Common Stock

Sale

Transaction value: $10,283,643
Shares: -62,344
Change %: -37%
Price: $164.95
Shares after: 106,810
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F1, F4

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: -88,060
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 01 Apr 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 88,060
Exercise price: $14.56
Footnotes: F1, F5

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

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 5 footnotes

Footnote F1

This transaction was effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on December 3, 2025, in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended.

Footnote F2

This is the weighted average sales price representing 6,715 shares sold at prices ranging from $162.52 to $163.51 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

This is the weighted average sales price representing 19,001 shares sold at prices ranging from $163.52 to $164.51 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 F4

This is the weighted average sales price representing 62,344 shares sold at prices ranging from $164.52 to $165.45 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 F5

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.