X0206 3 2021-07-29 0 0001739410 Rallybio Corp RLYB 0001247851 HUNT RONALD C/O RALLYBIO CORPORATION 234 CHURCH STREET, SUITE 1020 NEW HAVEN CT 06510 1 0 0 0 Common Stock 1993911 I New Leaf Ventures III, L.P. Option (Right to Buy) 13.00 2031-07-28 Common Stock 13440 D Shares are directly held by New Leaf Ventures III, L.P. ("NLV-III"). New Leaf Venture Associates III, L.P. ("NLVA-III LP") is the general partner of NLV-III and New Leaf Venture Management III, L.L.C. ("NLVM-III LLC) is the general partner of NLVA-III LP. The Reporting Person is a managing director of NLVM-III LLC and may be deemed to have shared voting, investment and dispositive power with respect to the shares held by NLV-III. The Reporting Person disclaims beneficial ownership of the shares held by NLV-III, except to the extent of his pecuniary interest therein, if any. The option vests as to the underlying shares of Common Stock on the earlier of July 28, 2022 and the date of the first annual meeting of stockholders of the Issuer following the closing of its initial public offering. Exhibit List: Exhibit 24 - Power of Attorney By: /s/ Michael Greco, Attorney-in-Fact 2021-07-29