Director Stock Option Grant for Uma Sinha at PROKIDNEY CORP.

Uma Sinha, a director at PROKIDNEY CORP., was granted 135,000 stock options on May 28, 2026. These options, exercisable at $1.81 per share, are for the company's Class A Common Stock and will vest in full on the earlier of the one-year anniversary of the grant date or the company's next annual general shareholder meeting. The options were granted under the company's non-employee director compensation policy. Following the transaction, Sinha holds 135,000 shares. The filing was signed by Todd Girolamo, attorney in fact, on May 29, 2026.