INSM insider files notice to sell 239,850 shares

INSM has a notice indicating potential sales of common stock.

Accepted by SEC EDGAR 08/10/2026 - 05:42 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

INSM has a notice indicating potential sales of common stock. The filing lists 239,850 common shares in the section on securities to be sold, with trading referenced on NASDAQ and an indicated date of August 10, 2026. The form also reports prior sales over the past three months by Roger Adsett, including transactions involving 2,370 and 5,837 common shares on June 3, 2026 and May 13, 2026, respectively. Additional figures such as 31,963,198 and 218,381,503 are reported in connection with the common stock.

Key Figures

Common shares covered: 239,850 shares Reported figure: 31,963,198 Reported figure (capital structure): 218,381,503 +4 more

7 metrics

Common shares covered 239,850 shares Listed in securities information and securities-to-be-sold sections

Reported figure 31,963,198 Reported alongside common stock in securities information

Reported figure (capital structure) 218,381,503 Reported with common stock in securities information

Prior sale volume 1 2,370 shares Common stock transaction dated June 3, 2026

Prior sale value 1 242,374 Reported for June 3, 2026 common stock sale

Prior sale volume 2 5,837 shares Common stock transaction dated May 13, 2026

Prior sale value 2 678,128 Reported for May 13, 2026 common stock sale

Key Terms

Securities Information, Securities To Be Sold, Stock Plan Activity, Securities Sold During The Past 3 Months

4 terms

Securities Information financial

"144: Securities Information Common | Merrill Lynch 1800 K ST NW"

Securities To Be Sold financial

"144: Securities To Be Sold Common | 08/10/2026 | Stock Plan Activity"

Stock Plan Activity financial

"Common | 08/10/2026 | Stock Plan Activity | Issuer"

Securities Sold During The Past 3 Months financial

"144: Securities Sold During The Past 3 Months Roger Adsett"

FAQ

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

What volume of INSM common stock is covered by this Form 144 notice?

The notice covers 239,850 common shares of INSM. This figure appears in the securities information and securities-to-be-sold sections, indicating the size of the potential stock sale.

On which market is INSM common stock referenced for this potential sale?

The common stock in this notice is associated with NASDAQ. The securities information section explicitly lists NASDAQ as the exchange in connection with the common stock subject to the potential sale.

What prior INSM stock sales by Roger Adsett are disclosed?

The filing discloses that Roger Adsett had prior transactions involving 2,370 common shares on June 3, 2026 and 5,837 common shares on May 13, 2026 in the past three months.

What large figures related to INSM common stock are included in the notice?

The notice includes figures of 31,963,198 and 218,381,503 in the common stock section. These values are reported alongside the 239,850 shares and help contextualize the overall capital structure.

What is the indicated date for the potential INSM stock sale in this filing?

The potential sale is indicated for August 10, 2026. This date appears both in the securities information section and again in the securities-to-be-sold section tied to the common stock.

How is stock plan activity referenced in this INSM Form 144?

The securities-to-be-sold section describes the common stock as related to Stock Plan Activity. This label identifies the source or nature of the securities included in the potential sale notice.

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

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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 INCORPORATED
SEC File Number
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	239850	31963198	218381503	08/10/2026	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	08/10/2026	Stock Plan Activity	Issuer			239850	08/10/2026	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	06/03/2026	2370	242374
Roger Adsett 700 US Highway 202/206 Bridgwater NJ 08807	Common	05/13/2026	5837	678128

144: Remarks and Signature

Remarks
Date of Notice	08/10/2026
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)