[144] Insmed, Inc. SEC Filing

Rhea-AI Filing Summary

Form 144 Notice of Proposed Sale filed by Sara Bonstein of Insmed indicates planned sale of 57,765 shares of common stock with an aggregate market value of $5,877,434 through Merrill Lynch. The sale is scheduled for June 23, 2025, on NASDAQ.

The shares were acquired through multiple stock plan activities between May 2024 and June 2025, with the largest acquisition being 47,889 shares on June 23, 2025. The filing reveals significant recent selling activity by Bonstein in the past 3 months:

• June 10, 2025: 57,766 shares sold for $5,146,210
• May 13-14, 2025: Combined 10,504 shares sold for $708,680
• June 3, 2025: 1,579 shares sold for $112,898

Total shares outstanding: 182,138,923. This planned sale represents approximately 0.03% of total shares outstanding.

Positive

• None.

Negative

• CFO Sara Bonstein sold a total of 69,849 shares in multiple transactions over the past 3 months, with recent gross proceeds of $5.97 million, indicating significant insider selling activity

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	57765	5877434.00	182138923	06/23/2025	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	06/23/2025	Stock plan activity	Issuer			47889	06/23/2025	n/a
Common	05/11/2024	Stock plan activity	Issuer			6102	05/11/2024	n/a
Common	06/01/2025	Stock plan activity	Issuer			492	06/01/2025	n/a
Common	05/12/2025	Stock plan activity	Issuer			458	05/12/2025	n/a
Common	05/11/2025	Stock plan activity	Issuer			2824	05/11/2025	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
Sara Bonstein 700 US HIGHWAY 202/206 BRIDGEWATER NJ 08807	Common	05/13/2025	8870	601474.00
Sara Bonstein 700 US HIGHWAY 202/206 BRIDGEWATER NJ 08807	Common	05/14/2025	1634	107206.00
Sara Bonstein 700 US HIGHWAY 202/206 BRIDGEWATER NJ 08807	Common	06/03/2025	1579	112898.00
Sara Bonstein 700 US HIGHWAY 202/206 BRIDGEWATER NJ 08807	Common	06/10/2025	57766	5146210.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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)