INSMED Inc (NASDAQ: INSM) CLO sells 1,806 shares under 10b5-1 plan

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

INSMED Inc Chief Legal Officer Michael Alexander Smith sold 1,806 shares of Common Stock in an open-market transaction. The shares were sold at a price of $95.82 per share. After this sale, he directly holds 37,648 shares of INSMED Inc Common Stock.

The transaction was executed under a pre-arranged Rule 10b5-1 trading plan adopted on November 7, 2025, which means the timing and amount were set in advance rather than decided at the moment of sale.

Insider Trade Summary 10b5-1

Net Seller: 1,806 shares ($173,051)

Net Sell 1 txn

Insider Smith Michael Alexander

Role Chief Legal Officer

Sold 1,806 shs ($173K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,806	$95.82	$173K

Holdings After Transaction: Common Stock — 37,648 shares (Direct, null)

Footnotes (1)

[object Object]

Key Figures

Shares sold: 1,806 shares Sale price per share: $95.82 per share Shares owned after sale: 37,648 shares +1 more

4 metrics

Shares sold 1,806 shares Open-market sale of Common Stock

Sale price per share $95.82 per share Price for the 1,806-share sale

Shares owned after sale 37,648 shares Direct holdings following transaction

Net shares sold 1,806 shares Net selling activity in this Form 4

Key Terms

Rule 10b5-1, open-market sale, Common Stock, Form 4

4 terms

Rule 10b5-1 regulatory

"in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

""security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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

Add on Google

Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/24/2026 - 04:12 PM Accepted by SEC EDGAR 06/24/2026 - 04:11 PM

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^*

Smith Michael Alexander

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/22/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/22/2026		S⁽¹⁾		1,806	D	$95.82	37,648	D

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. This transaction was effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on November 7, 2025, in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended.

Remarks:

	/s/ Michael A. Smith	06/24/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did INSM (INSMED Inc) disclose in this Form 4?

INSMED Inc disclosed that Chief Legal Officer Michael Alexander Smith completed an open-market sale of 1,806 shares of Common Stock at $95.82 per share. Following this transaction, he directly holds 37,648 shares of the company’s Common Stock.

Who is the insider involved in the latest INSM Form 4 filing and what is his role?

The insider is Michael Alexander Smith, who serves as Chief Legal Officer at INSMED Inc. He reported an open-market sale of 1,806 shares of Common Stock and now directly owns 37,648 shares after the reported transaction.

How many INSM shares did the Chief Legal Officer sell and at what price?

The Chief Legal Officer sold 1,806 shares of INSMED Inc Common Stock at a price of $95.82 per share. This was an open-market sale, as indicated by the transaction code and description in the Form 4 filing.

How many INSM shares does the insider own after this reported sale?

After the reported sale, the insider directly holds 37,648 shares of INSMED Inc Common Stock. This figure reflects his direct ownership position immediately following the open-market sale of 1,806 shares disclosed in the Form 4.

Was the INSM insider sale executed under a Rule 10b5-1 trading plan?

Yes. The filing states the transaction was effected under a Rule 10b5-1 trading plan adopted on November 7, 2025. Such plans pre-schedule trades, meaning timing and share amounts are set in advance under predetermined instructions.

What does the transaction code in the INSM Form 4 indicate about this trade?

The Form 4 shows transaction code "S," described as a sale in an open market or private transaction. Combined with the provided description, it confirms this was an open-market sale of 1,806 INSMED Inc Common Stock shares at $95.82 per share.