Insmed (NASDAQ: INSM) insider plans 2,059-share sale in Form 144

Rhea-AI Filing Summary

Insmed Inc. insider Roger Adsett filed a notice of proposed sale of 2,059 shares of common stock, with an aggregate market value of 358,616, to be sold on or about 01/08/2026 through Merrill Lynch on the NASDAQ. These shares were acquired on 01/06/2026 via stock plan activity from the issuer. Over the past three months, Adsett has sold 802 common shares for gross proceeds of 140,406 on 01/07/2026 and 1,429 common shares for gross proceeds of 247,688 on 01/06/2026. Shares of the issuer outstanding are reported as 213,273,469.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Merrill Lynch 1800 K ST NW Suite 800 Washington DC 20006	2059	358616	213273469	01/08/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	01/06/2026	Stock Plan Activity	Issuer			2059	01/06/2026	n/a

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Roger Adsett 700 US Highway 202/206 Bridgewater NJ 08807	Common	01/07/2026	802	140406
Roger Adsett 700 US Highway 202/206 Bridgewater NJ 08807	Common	01/06/2026	1429	247688

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Insmed (INSM) disclose in this Form 144 filing?

The filing shows that Roger Adsett intends to sell 2,059 shares of Insmed common stock, with an aggregate market value of 358,616, through Merrill Lynch on the NASDAQ around 01/08/2026.

Who is selling Insmed (INSM) shares and in what amount?

Roger Adsett is the selling security holder, planning to sell 2,059 common shares of Insmed, as disclosed in the Form 144 notice.

How were the Insmed (INSM) shares to be sold acquired?

The 2,059 Insmed common shares to be sold were acquired on 01/06/2026 via stock plan activity from the issuer, with payment also dated 01/06/2026.

What prior Insmed (INSM) share sales has Roger Adsett reported?

During the past three months, Roger Adsett sold 802 common shares on 01/07/2026 for gross proceeds of 140,406 and 1,429 common shares on 01/06/2026 for gross proceeds of 247,688.

What is the reported number of Insmed (INSM) shares outstanding?

The Form 144 disclosure lists 213,273,469 common shares of Insmed as outstanding.

Which broker and exchange are involved in this Insmed (INSM) Form 144 sale?

The planned sale of 2,059 Insmed common shares is through Merrill Lynch, with the shares to be sold on the NASDAQ exchange.