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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1104506	Insmed Inc	INSM	Pharmaceutical Preparations (2834)	541972729

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1402051	William Lewis	700 Us Highway 202/206 Bridgewater NJ 08807	Chair And Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2025-04-15	6,830	$10.85	240,754	No	4	M	Indirect	By the Katie Procter Dynasty Trust
Common Stock	Disposition	2025-04-15	3,334	$69.62	237,420	No	4	S	Indirect	By the Katie Procter Dynasty Trust
Common Stock	Disposition	2025-04-15	2,896	$70.54	234,524	No	4	S	Indirect	By the Katie Procter Dynasty Trust
Common Stock	Disposition	2025-04-15	600	$71.30	233,924	No	4	S	Indirect	By the Katie Procter Dynasty Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Indirect	By the Katie Procter Dynasty Trust
No	4	S	Indirect	By the Katie Procter Dynasty Trust
No	4	S	Indirect	By the Katie Procter Dynasty Trust
No	4	S	Indirect	By the Katie Procter Dynasty Trust

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (right to buy)	Disposition	2025-04-15	6,830	$0.00	6,830	$10.85

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
177,650		2026-05-19	No	4	M	Indirect

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	334,186	Direct
Common Stock	50,500	Indirect	By the William Lewis Family Legacy Trust

Footnotes

This transaction was effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended.
This is the weighted average sales price representing 3,334 shares sold at prices ranging from $69.06 to $69.92 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.
This is the weighted average sales price representing 2,896 shares sold at prices ranging from $70.12 to $71.09 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.
This is the weighted average sales price representing 600 shares sold at prices ranging from $71.17 to $71.52 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.
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. All options are currently exercisable.