X0206 3 2021-07-29 0 0001739410 Rallybio Corp RLYB 0001664281 PARMAR KUSH C/O RALLYBIO CORPORATION 234 CHURCH STREET, SUITE 1020 NEW HAVEN CT 06510 1 0 1 0 Common Stock 790714 I See Footnote Common Stock 2784626 I See Footnote Option (Right to Buy) 13.00 2031-07-28 Common Stock 13440 D Shares of common stock are held directly by 5AM Opportunities I, L.P. ("Opportunities I, L.P."). 5AM Opportunities I (GP), LLC ("Opportunities I (GP)") is the general partner of Opportunities I, L.P. Dr. Parmar is a managing member of Opportunities I (GP), and may be deemed to share voting and dispositive power over the shares held by Opportunities I, L.P. Dr. Parmar disclaims beneficial ownership of the shares held by Opportunities I, L.P. except to the extent of his pecuniary interest therein. Shares of common stock are held directly by 5AM Ventures V, L.P. ("Ventures V"). 5AM Partners V, LLC ("Partners V") is the sole general partner of Ventures V. Dr. Parmar is a managing member of Partners V and may be deemed to share voting and investment power over the shares held by Ventures V. Dr. Parmar disclaims beneficial ownership of the shares held by Ventures V except to the extent of his pecuniary interest therein. 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 /s/ Michael Greco, Attorney-in-Fact 2021-07-29