John D. Quisel - 10 Feb 2026 Form 4 Insider Report for Disc Medicine, Inc. (IRON)

Role: Chief Executive Officer, Director
Signature: By: /s/ Rahul Khara, as Attorney-in-Fact
Issuer symbol: IRON
Transactions as of: 10 Feb 2026
Net transactions value: $0
Form type: 4
Filing time: 11 Feb 2026, 19:12:49 UTC
Previous filing: 19 Dec 2025
Next filing: 17 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Quisel John D	Chief Executive Officer, Director	C/O DISC MEDICINE, INC., 321 ARSENAL STREET, SUITE 101, WATERTOWN	By: /s/ Rahul Khara, as Attorney-in-Fact	11 Feb 2026	0001586788

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	IRON	Common Stock	Award	$0	+55,200	+30%	$0.000000	239,328	10 Feb 2026	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	IRON	Stock Option (Right to Buy)	Award	$0	+82,800		$0.000000	82,800	10 Feb 2026	Common Stock	82,800	$74.75	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents restricted stock units ("RSUs"), each representing a contingent right to receive one share of the Issuer's Common Stock. The RSUs shall vest annually in four 25% installments commencing on February 15, 2027, subject to the Reporting Person's continued service on each such vesting date.
F2	The shares underlying this option vest in 48 equal monthly installments commencing on March 10, 2026, subject to the Reporting Person's continued service on each such vesting date.