Kevin Bitterman - 11 Jun 2025 Form 4 Insider Report for Disc Medicine, Inc. (IRON)

Role: Director
Signature: /s/ Ommer Chohan, Attorney-in-Fact
Issuer symbol: IRON
Transactions as of: 11 Jun 2025
Net transactions value: $0
Form type: 4
Filing time: 13 Jun 2025, 17:14:57 UTC
Previous filing: 20 Jun 2024
Next filing: 22 Jul 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Bitterman Kevin	Director	C/O DISC MEDICINE, INC., 321 ARSENAL STREET, SUITE 101, WATERTOWN	/s/ Ommer Chohan, Attorney-in-Fact	13 Jun 2025	0001591747

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	+10,000		$0.000000	10,000	11 Jun 2025	Common Stock	10,000	$50.86	Direct	F1, F2

* 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 vest upon the first to occur of (i) the date of the Company's 2026 annual meeting of its stockholders, or (ii) the one-year anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date.
F2	This option was granted to the Reporting Person, a director of the Issuer. The proceeds of any sale of shares of common stock issued to the Reporting Person upon exercise of this option will be transferred to Atlas Venture Life Science Advisors, LLC and as such, the Reporting Person disclaims ownership of such securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, except to the extent of his pecuniary interest therein, if any.

Content

The shares underlying this option vest upon the first to occur of (i) the date of the Company's 2026 annual meeting of its stockholders, or (ii) the one-year anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date.

This option was granted to the Reporting Person, a director of the Issuer. The proceeds of any sale of shares of common stock issued to the Reporting Person upon exercise of this option will be transferred to Atlas Venture Life Science Advisors, LLC and as such, the Reporting Person disclaims ownership of such securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, except to the extent of his pecuniary interest therein, if any.