John D. Quisel - 19 Dec 2025 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
19 Dec 2025
Transactions value $
$12,423
Form type
4
Filing time
19 Dec 2025, 18:16:36 UTC
Previous filing
15 Dec 2025
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 19 Dec 2025 0001586788

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction IRON Common Stock Options Exercise $12.4K +12.3K +7.16% $1.01 184K 19 Dec 2025 Direct

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) Options Exercise $0 -12.3K -6.2% $0.00 186K 19 Dec 2025 Common Stock 12.3K $1.01 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The shares underlying this option are fully vested and exercisable as of the date hereof.