Disc Medicine (IRON) COO sells shares in tax-related transaction

Rhea-AI Filing Summary

Disc Medicine, Inc. Chief Operating Officer Yu Jonathan Yen-Wen reported an open-market sale of 3,231 shares of common stock at $62.86 per share. After the transaction, he directly owns 54,324 shares. According to the footnote, the sale was solely to cover tax withholding on vesting restricted stock units and was not a discretionary trade.

Insider Trade Summary

Net Seller: 3,231 shares ($203,101)

Net Sell 1 txn

Insider Yu Jonathan Yen-Wen

Role Chief Operating Officer

Sold 3,231 shs ($203K)

Type	Security	Shares	Price	Value
Sale	Common Stock	3,231	$62.86	$203K

Holdings After Transaction: Common Stock — 54,324 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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^*

Yu Jonathan Yen-Wen

(Last) (First) (Middle)

C/O DISC MEDICINE, INC.

321 ARSENAL STREET, SUITE 101

(Street)

WATERTOWN MA 02472

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Disc Medicine, Inc. [ IRON ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
02/17/2026

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	02/17/2026		S(1)		3,231	D	$62.86	54,324	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This transaction represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of certain restricted stock units previously reported in Table I. This sale is a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person.

	By: /s/ Rahul Khara, as Attorney-in-Fact	02/17/2026
	** 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.

FAQ

What did Disc Medicine (IRON) COO report in this Form 4 filing?

Disc Medicine Chief Operating Officer Yu Jonathan Yen-Wen reported selling 3,231 shares of common stock at $62.86 per share. The filing states this was done to cover tax withholding from vesting restricted stock units, rather than as a discretionary stock sale.

How many Disc Medicine (IRON) shares does the COO hold after the sale?

After the reported transaction, the COO directly holds 54,324 shares of Disc Medicine common stock. This figure reflects his ownership following the 3,231-share sale executed at $62.86 per share to satisfy tax withholding obligations.

Was the Disc Medicine (IRON) COO’s share sale a discretionary trade?

No, the filing explains the sale was a “sell to cover” transaction. Shares were sold to satisfy tax withholding obligations tied to vesting restricted stock units, and the document notes it does not represent a discretionary transaction by the reporting person.

What price was received for the Disc Medicine (IRON) shares sold?

The reported transaction shows the COO sold 3,231 shares of Disc Medicine common stock at a price of $62.86 per share. This price applies to the entire block of shares sold to cover tax withholding on vesting restricted stock units.

What is the transaction code used in the Disc Medicine (IRON) Form 4?

The Form 4 uses transaction code “S”, indicating a sale of common stock in an open-market or private transaction. A footnote clarifies that, despite the sale code, the purpose was tax withholding for vesting restricted stock units, not a discretionary stock sale.