[Form 4] Insmed, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Insmed, Inc. (INSM) Form 4 shows Director Melvin Sharoky reported a sale of 10,000 shares of Insmed common stock on 08/20/2025 at a reported price of $129.50 per share. After the sale, the reporting person beneficially owns 274,516 shares, held directly and indirectly through various entities and UTMA custodial accounts.

The filing lists multiple indirect holdings: 100 shares held for Owen F. Paley UTMA/FL, 900 by Baby Gator LLC, 10,000 by Padonia, LLC, and additional amounts held for family members and custodial accounts. The report was signed by Melvin Sharoky via attorney-in-fact on 08/21/2025.

Positive

• Director retains a sizable stake with 274,516 shares beneficially owned following the transaction
• Clear disclosure of indirect holdings through LLCs and UTMA custodial accounts improves transparency

Negative

• Insider disposed of 10,000 shares on 08/20/2025 at $129.50 per share, reducing direct holdings

Insights

Financial Analyst

TL;DR: Director sold a modest stake; remaining ownership still sizeable at 274,516 shares.

The Form 4 documents a single open-market sale of 10,000 shares at $129.50 on 08/20/2025. The transaction reduced the reporting person's direct holdings but leaves a substantial combined position of 274,516 shares, including direct and multiple indirect custodial and entity holdings. This appears to be a routine insider sale rather than an equity grant or derivative exercise, with no additional securities or derivative transactions disclosed.

Corporate Governance Expert

TL;DR: Disclosure is standard and complete for Section 16 reporting; multiple indirect holdings are clearly identified.

The filing complies with Section 16 disclosure by identifying the reporting person as a Director and listing the sale, the price, and post-transaction beneficial ownership. Indirect ownership through LLCs and UTMA custodial accounts is explicitly explained, which aids transparency for investors assessing insider holdings and potential conflicts of interest. No amendments or derivative positions were reported.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

SHAROKY MELVIN MD

(Last) (First) (Middle)

700 US HIGHWAY 202/206

(Street)

BRIDGEWATER NJ 08807

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
INSMED Inc [ INSM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
08/20/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/20/2025		S		10,000	D	$129.5	274,516	D
Common Stock								100	I	By Melvin Sharoky C/F Owen F. Paley UTMA/FL(1)
Common Stock								900	I	By Baby Gator LLC(2)
Common Stock								10,000	I	By Padonia, LLC(3)
Common Stock								6,847	I	By spouse
Common Stock								5,180	I	By Melvin Sharoky C/F Nolan M. Wink UTMA/FL(4)
Common Stock								100	I	By Melvin Sharoky C/F Wren J. Sharoky UTMA/FL(5)
Common Stock								3,481	I	By Melvin Sharoky C/F Tulia L. Sharoky UTMA/FL(6)
Common Stock								576	I	By Melvin Sharoky C/F Adler J. Wink UTMA/FL(7)
Common Stock								100	I	By Melvin Sharoky C/F Leo J. Sharoky UTMA/FL(8)
Common Stock								4,764	I	By Melvin Sharoky C/F Sophie C. Wink UTMA/FL(9)
Common Stock								100	I	By Melvin Sharoky C/F Violet A. Paley UTMA/FL(10)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The Reporting Person is the custodian of Melvin Sharoky C/F Owen F. Paley UTMA/FL.

2. The Reporting Person is a managing member of Baby Gator LLC.

3. The Reporting Person is the managing member of Padonia, LLC.

4. The Reporting Person is the custodian of Melvin Sharoky C/F Nolan M. Wink UTMA/FL.

5. The Reporting Person is the custodian of Melvin Sharoky C/F Wren J. Sharoky UTMA/FL.

6. The Reporting Person is the custodian of Melvin Sharoky C/F Tulia L. Sharoky UTMA/FL.

7. The Reporting Person is the custodian of Melvin Sharoky C/F Adler J. Wink UTMA/FL.

8. The Reporting Person is the custodian of Melvin Sharoky C/F Leo J. Sharoky UTMA/FL.

9. The Reporting Person is the custodian of Melvin Sharoky C/F Sophie C. Wink UTMA/FL.

10. The Reporting Person is the custodian of Melvin Sharoky C/F Violet A. Paley UTMA/FL.

Remarks:

	/s/ Melvin Sharoky, M.D, by Michael A. Smith as Attorney-in-fact	08/21/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What transaction did Melvin Sharoky report on Form 4 for INSM?

The Form 4 reports a sale of 10,000 shares of Insmed common stock on 08/20/2025 at a price of $129.50 per share.

How many Insmed (INSM) shares does the reporting person own after the sale?

After the reported transaction, the reporting person beneficially owns 274,516 shares in total (direct and indirect).

Were any derivative securities reported on this Form 4 for INSM?

No derivative securities (options, warrants, convertible securities) were reported in Table II of this Form 4.

What indirect holdings does the Form 4 disclose for Melvin Sharoky?

The filing discloses indirect holdings via Baby Gator LLC (900 shares), Padonia, LLC (10,000 shares), and multiple UTMA custodial accounts for family members with specified share amounts.

When was the Form 4 signed and filed?

The Form 4 was signed by Melvin Sharoky via attorney-in-fact on 08/21/2025 and reports the transaction dated 08/20/2025.