Company: PRME
Filing Date: 2025-07-14
Form Type: DEF 14A
Source: 0001193125-25-158716
Chunk: 25

Company: Prime Medicine, Inc.
Filing Date: 2025-07-14
Form: DEF 14A
Chunk 25
---
1, and (c) 3,200,000 shares of common stock held by GV 2023, L.P., or GV 2023.                                                             |

The general partner of the GV 2019, L.P. (the “2019 Partnership”) is GV 2019 GP, L.P. (“2019 GP”). The general partner of 2019 GP is GV 2019 GP, L.L.C. (“2019 LLC”). The sole member of 2019 LLC is Alphabet Holdings LLC (“Alphabet Holdings”). The sole member of Alphabet Holdings is XXVI Holdings Inc. (“XXVI”). The controlling stockholder of XXVI is Alphabet Inc. (Alphabet Inc., together with 2019 GP, 2019 LLC, Alphabet Holdings, and XXVI may be collectively referred to as the “2019 Partnership Affiliates”). Each of the 2019 Partnership Affiliates may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3of the Exchange Act) the securities directly beneficially owned by the 2019 Partnership. The general partner of the GV 2021, L.P. (the “2021 Partnership”) is GV 2021 GP, L.P. (“2021 GP”). The general partner of 2021 GP is GV 2021 GP, L.L.C. (“2021 LLC”). The sole member of 2021 LLC is Alphabet 17

Holdings. The sole member of Alphabet Holdings is XXVI. The controlling stockholder of XXVI is Alphabet Inc. (Alphabet Inc., together with 2021 GP, 2021 LLC, Alphabet Holdings, and XXVI may be referred to as the “2021 Partnership Affiliates”). Each of the 2021 Partnership Affiliates may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3of the Exchange Act) the securities directly beneficially owned by the 2021 Partnership. The general partner of the GV 2023, L.P. (the “2023 Partnership”) is GV 2023 GP, L.P. (“2023 GP”). The general partner of 2023 GP is GV 2023 GP, L.L.C. (“2023 LLC”). The sole member of 2023 LLC is Alphabet Holdings. The sole member of Alphabet Holdings is XXVI. The controlling stockholder of XXVI is Alphabet Inc. (Alphabet Inc., together with 2023 GP, 202