X0206 3 2022-07-11 0 0001850270 PROKIDNEY CORP. PROK 0001851024 SC Master Holdings, LLC 506 SANTA CRUZ AVENUE, SUITE 300 MENLO PARK CA 94025 0 0 1 0 0001938696 SC PIPE Holdings LLC 506 SANTA CRUZ AVENUE, SUITE 300 MENLO PARK CA 94025 0 0 1 0 Class A ordinary shares 13273000 D Represents (i) 9,500,000 Class A ordinary shares held of record by SC PIPE Holdings LLC ("SC PIPE Holdings") and (ii) 3,773,000 Class A ordinary shares held of record by SC Master Holdings, LLC ("SC Master Holdings"). SC Master Holdings is the sole member of SC PIPE Holdings. SC Master Holdings may be deemed to beneficially own shares held by SC PIPE Holdings by virtue of its direct interest in SC PIPE Holdings or its control over SC PIPE Holdings, as the case may be. The inclusion of the securities in this report shall not be deemed an admission by the reporting person of beneficial ownership of all of the reported securities for purposes of Section 16 of the Securities Exchange Act of 1934 or for any other purpose or that any of the transactions reported herein are subject to Section 16. SC MASTER HOLDINGS, LLC and SC PIPE HOLDINGS LLC, By: /s/ James Ryans, as Authorized Signatory 2022-07-20