Insmed (NASDAQ: INSM) director receives 3,305 RSUs equity award

Rhea-AI Filing Summary

Desjardins Clarissa reported acquisition or exercise transactions in this Form 4 filing.

INSMED Inc director Clarissa Desjardins reported a new equity award and updated holdings. She received a grant of 3,305 Restricted Stock Units (RSUs) of Common Stock on May 13, 2026 for no cash consideration. After this grant, she holds 70,312 shares of Common Stock directly and 3,025 shares indirectly through her spouse.

The RSUs represent a contingent right to receive one share of Common Stock each and vest in full on the first anniversary of the grant date. Vesting requires that she remain on the Board through the earlier of that anniversary or the company’s annual shareholder meeting in that year and attend at least 75% of Board meetings during the vesting period.

Insider Trade Summary

Net Buyer: 3,305 shares

Net Buy 2 txns

Insider Desjardins Clarissa

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	3,305	$0.00	$0.00
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 70,312 shares (Direct); Common Stock — 3,025 shares (Indirect, By spouse)

Footnotes (2)

1. F1. Represents Restricted Stock Units (RSUs), each representing a contingent right to receive one share of Common Stock. The RSUs vest in full on the first anniversary of the grant date (the Vesting Date), provided that the director (a) remains a member of the Board of Directors of the issuer until the earlier of (i) such Vesting Date and (ii) the Company's Annual Shareholder Meeting in the year of such Vesting Date, and (b) attends at least 75% of the meetings of the Board of Directors which take place between the grant date and the first anniversary of the grant date.
2. F2. Each RSU was granted on May 13, 2026, for no consideration.

Key Figures

RSUs granted: 3,305 RSUs Grant price: $0.0000 per share Direct holdings after grant: 70,312 shares +3 more

6 metrics

RSUs granted 3,305 RSUs Grant of Restricted Stock Units on May 13, 2026

Grant price $0.0000 per share RSUs granted for no consideration

Direct holdings after grant 70,312 shares Common Stock directly owned following RSU award

Indirect holdings after grant 3,025 shares Common Stock held indirectly by spouse

Vesting period 1 year RSUs vest on first anniversary of May 13, 2026 grant

Board meeting attendance requirement 75% Minimum Board meeting attendance between grant and vesting

Key Terms

Restricted Stock Units (RSUs), contingent right, Vesting Date, Annual Shareholder Meeting, +1 more

5 terms

Restricted Stock Units (RSUs) financial

"Represents Restricted Stock Units (RSUs), each representing a contingent right to receive one share of Common Stock."

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

contingent right financial

"each representing a contingent right to receive one share of Common Stock."

Vesting Date financial

"The RSUs vest in full on the first anniversary of the grant date (the Vesting Date)"

Annual Shareholder Meeting financial

"until the earlier of (i) such Vesting Date and (ii) the Company's Annual Shareholder Meeting in the year of such Vesting Date"

A yearly gathering where a company’s owners (shareholders) and its leaders meet to review performance, approve key decisions like electing directors, and vote on issues such as executive pay or major policy changes. Think of it as an annual town hall for people who own part of the business: investors use it to ask questions, influence direction through votes, and gauge management’s plans and transparency, all of which can affect the stock’s outlook.

indirect ownership financial

"total_shares_following_transaction: 3025.0000, direct_or_indirect: I, nature_of_ownership: By spouse"

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

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 05/15/2026 - 04:07 PM Learn about SEC filing dates

FAQ

What insider transaction did INSM director Clarissa Desjardins report on this Form 4 for INSM?

Clarissa Desjardins reported receiving 3,305 Restricted Stock Units (RSUs) of INSMED Inc Common Stock. The RSUs were granted as director compensation, with no cash paid, and add to her existing direct and indirect share ownership positions in the company.

How many INSM shares does Clarissa Desjardins hold after this Form 4 transaction for INSM?

After the reported grant, Clarissa Desjardins holds 70,312 shares of INSMED Inc Common Stock directly. She also has indirect ownership of 3,025 additional shares through her spouse, reflecting both her personal and family-related equity exposure to the company.

What are the vesting conditions for the 3,305 RSUs granted to INSM director Clarissa Desjardins?

The 3,305 RSUs vest in full on the first anniversary of the May 13, 2026 grant date. Vesting requires that she remains a Board member through that date or the annual shareholder meeting and attends at least 75% of Board meetings during the vesting period.

Did Clarissa Desjardins pay cash for the 3,305 INSM RSUs reported on this Form 4?

No, Clarissa Desjardins did not pay cash for the award. The filing states that each Restricted Stock Unit was granted on May 13, 2026 for no consideration, indicating a compensation-related equity grant rather than an open-market share purchase.

Are the 3,305 INSMED RSUs immediately settled in shares for Clarissa Desjardins?

The 3,305 RSUs are not immediately settled in shares. Each unit represents a contingent right to receive one share of Common Stock and will only convert to shares if the specified vesting conditions related to service and Board meeting attendance are met.

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Desjardins Clarissa

(Last) (First) (Middle)

700 US HIGHWAY 202/206

(Street)

BRIDGEWATER NEW JERSEY 08807

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026

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

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

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

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	05/13/2026		A		3,305(1)	A	(2)	70,312	D
Common Stock								3,025	I	By spouse

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. Represents Restricted Stock Units (RSUs), each representing a contingent right to receive one share of Common Stock. The RSUs vest in full on the first anniversary of the grant date (the Vesting Date), provided that the director (a) remains a member of the Board of Directors of the issuer until the earlier of (i) such Vesting Date and (ii) the Company's Annual Shareholder Meeting in the year of such Vesting Date, and (b) attends at least 75% of the meetings of the Board of Directors which take place between the grant date and the first anniversary of the grant date.

2. Each RSU was granted on May 13, 2026, for no consideration.

Remarks:

Exhibit List - Exhibit 24 - Power of Attorney

	/s/ Clarissa Desjardins, Ph.D., by Michael A. Smith as Attorney-in-fact	05/15/2026
	** 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.
* Form 4: SEC 1474 (03-26)