INSM Form 144: Insider sale of 88,060 shares

INSM files a Form 144 reporting a proposed sale of common stock.

Rhea-AI Filing Summary

INSM files a Form 144 reporting a proposed sale of common stock. The filing lists a reported sale of 88,060 shares by Roger Adsett on 04/01/2026. The notice also records a Stock Plan Activity entry dated 05/11/2026 under issuer treatment.

Key Figures

Form type: Form 144 Shares reported sold: 88,060 shares Stock plan activity date: 05/11/2026 +1 more

4 metrics

Form type Form 144 notice of proposed sale of securities

Shares reported sold 88,060 shares Sale reported by Roger Adsett on 04/01/2026

Stock plan activity date 05/11/2026 Stock Plan Activity listed as Issuer

Exchange NASDAQ Securities market listed on filing header

Key Terms

Form 144, Stock Plan Activity, Issuer

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Stock Plan Activity financial

"Common | 05/11/2026 | Stock Plan Activity"

Issuer regulatory

"Stock Plan Activity | Issuer"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the INSM Form 144 report show?

It reports a proposed sale of common stock by an insider. The filing shows 88,060 shares sold by Roger Adsett on 04/01/2026, and a Stock Plan Activity entry dated 05/11/2026 listed as Issuer treatment.

Who is the selling party named in the INSM Form 144?

The filing names Roger Adsett as the person associated with the sale. The address listed is 700 US Highway 202/206, Bridgwater, NJ 08807, tied to the 04/01/2026 sale of shares.

When were the reported transactions dated in the filing?

The reported sale date is 04/01/2026 for 88,060 shares. A separate stock-plan activity record is dated 05/11/2026 and is characterized as Issuer stock-plan activity.

Does the Form 144 indicate how the shares will be sold?

The excerpt lists the proposed sale but does not specify distribution methods. The filing shows stock-plan activity and the insider sale; exact sale mechanics are not detailed in the provided text.

AI-generated analysis. How Rhea-AI works. Not financial advice.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 05/13/2026 - 05:24 PM EDT Learn about SEC filing dates

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	0001685904
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	INSMED INC
SEC File Number	000-30739
Address of Issuer	700 US Highway 202/206 Bridgewater NEW JERSEY 08807
Phone	9089779900
Name of Person for Whose Account the Securities are To Be Sold	Roger Adsett
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	Officer

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	5837	678142	216752451	05/13/2026	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	05/11/2026	Stock Plan Activity	Issuer			5837	05/11/2026	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 Bridgwater NJ 08807	Common	04/01/2026	88060	14497473

144: Remarks and Signature

Remarks
Date of Notice	05/13/2026
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	Roger Adsett
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)