X0206 3 2022-12-29 0 0001816736 Disc Medicine, Inc. IRON 0001591747 Bitterman Kevin C/O DISC MEDICINE, INC. 321 ARSENAL STREET, SUITE 101 WATERTOWN MA 02472 1 0 0 0 Common Stock 1173482 I See footnote 955,156 shares held by Atlas Venture Opportunity I, LP ("Opportunity I") and 218,326 shares held by Atlas Venture Opportunity II, LP ("Opportunity II"). The general partner of Opportunity I is Atlas Venture Associates Opportunity I, LP ("Associates I"). Atlas Venture Associates Opportunity I, LLC ("Associates I LLC") is the general partner of Associates I. The reporting person is a member of Associates I LLC and disclaims beneficial ownership of such securities held by Opportunity I, except to the extent of his pecuniary interest therein, if any. The general partner of Opportunity II is Atlas Venture Associates Opportunity II, LP ("Associates II"). Atlas Venture Associates Opportunity II, LLC ("Associates II LLC") is the general partner of Associates II. The reporting person is a member of Associates II LLC and disclaims beneficial ownership of such securities held by Opportunity II, except to the extent of his pecuniary interest therein, if any. Exhibit 24 - Power of Attorney /s/ Ommer Chohan, attorney-in-fact 2023-01-03