AI DMI LLC - 22 Oct 2025 Form 4 Insider Report for Disc Medicine, Inc. (IRON)

Role: 10%+ Owner
Signature: /s/ Alejandro Moreno for AI DMI LLC
Issuer symbol: IRON
Transactions as of: 22 Oct 2025
Net transactions value: -$59,873,462
Form type: 4
Filing time: 24 Oct 2025, 16:01:03 UTC
Previous filing: 20 Jun 2024
SEC: View on sec.gov

Reporting Owners (4)

Name	Relationship	Address	Signature	Signature date	CIK
AI DMI LLC	10%+ Owner	C/O ACCESS INDUSTRIES, INC., 40 WEST 57TH STREET, 28TH FLOOR, NEW YORK	/s/ Alejandro Moreno for AI DMI LLC	24 Oct 2025	0001890993
Access Industries Holdings LLC	10%+ Owner	C/O ACCESS INDUSTRIES, INC., 40 WEST 57TH STREET, 28TH FLOOR, NEW YORK	/s/ Alejandro Moreno for Access Industries Holdings LLC	24 Oct 2025	0001391297
ACCESS INDUSTRIES MANAGEMENT, LLC	10%+ Owner	C/O ACCESS INDUSTRIES, INC., 40 WEST 57TH STREET, 28TH FLOOR, NEW YORK	/s/ Alejandro Moreno for Access Industries Management, LLC	24 Oct 2025	0001508226
Blavatnik Len	10%+ Owner	C/O ACCESS INDUSTRIES, INC., 40 WEST 57TH STREET, 28TH FLOOR, NEW YORK	/s/ Alejandro Moreno as Attorney-in-Fact for Mr. Blavatnik	24 Oct 2025	0001326628

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	IRON	Common Stock	Sale	$59,873,462	-744,047	-21%	$80.47	2,814,379	22 Oct 2025	Direct	F1, F2

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

AI DMI LLC is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id	Content
F1	On October 22, 2025, AI DMI LLC ("AI DMI") sold 744,047 shares of common stock of Disc Medicine, Inc., par value $0.0001 per share, pursuant to an underwritten secondary offering.
F2	The securities reported are held directly by AI DMI and may be deemed to be beneficially owned by Access Industries Holdings LLC ("AIH"), Access Industries Management, LLC ("AIM") and Len Blavatnik because Len Blavatnik controls AIM and holds a majority of the outstanding voting interests in AIH, AIM controls AIH, and AIH indirectly controls all of the outstanding voting interests in AI DMI LLC. Each of the reporting persons (other than AI DMI) disclaims beneficial ownership of these securities, except to the extent of its or his pecuniary interest therein, and this form shall not be construed as an admission that any such reporting person is the beneficial owner of any of the securities reported on this form.

Content

On October 22, 2025, AI DMI LLC ("AI DMI") sold 744,047 shares of common stock of Disc Medicine, Inc., par value $0.0001 per share, pursuant to an underwritten secondary offering.

The securities reported are held directly by AI DMI and may be deemed to be beneficially owned by Access Industries Holdings LLC ("AIH"), Access Industries Management, LLC ("AIM") and Len Blavatnik because Len Blavatnik controls AIM and holds a majority of the outstanding voting interests in AIH, AIM controls AIH, and AIH indirectly controls all of the outstanding voting interests in AI DMI LLC. Each of the reporting persons (other than AI DMI) disclaims beneficial ownership of these securities, except to the extent of its or his pecuniary interest therein, and this form shall not be construed as an admission that any such reporting person is the beneficial owner of any of the securities reported on this form.