PROK's three largest insider shareholders as of May 30, 2026 are Empresarial De Capitales S.A. De C.V. Control (TenPercentOwner, 73.84Mn shares), Pablo G. Legorreta (Director, 22.62Mn shares), Aaron Cowen (TenPercentOwner, 6.28Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Empresarial De Capitales S.A. De C.V. Control | - | 73,842,723 | 0 | 24 Apr, 2025 |
| Brian Jg Pereira | - | 81,928 | 675,234 | 06 Feb, 2025 |
| Pablo G. Legorreta | - | 0 | 22,617,909 | 05 Jun, 2025 |
| Uma Sinha | - | 30,000 | 0 | 13 Jul, 2022 |
| Aaron Cowen | - | 0 | 6,280,175 | 08 Sep, 2022 |
| Todd C Girolamo | Chief Legal Officer | 163,856 | 0 | 02 Aug, 2024 |
| Darin J. Weber | Chief Regulatory Officer | 103,480 | 0 | 20 Sep, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 01 Mar, 2026 | Darin J. Weber | Employee stock option (right to buy) | A | 400,000 | $0.00 | 400,000 | D | A |
| 01 Mar, 2026 | Darin J. Weber | Employee stock option (right to buy) | A | 400,000 | $0.00 | 400,000 | D | A |
| 01 Mar, 2026 | Bruce Culleton | Employee stock option (right to buy) | A | 3,000,000 | $0.00 | 3,000,000 | D | A |
| 01 Mar, 2026 | James Coulston | Employee stock option (right to buy) | A | 600,000 | $0.00 | 600,000 | D | A |
| 01 Mar, 2026 | Todd C Girolamo | Employee stock option (right to buy) | A | 600,000 | $0.00 | 600,000 | D | A |
| 12 Nov, 2025 | Brian Jg Pereira | Class A Common Stock | D | 227,431 | $2.72 | 447,803 | I | S |
| 12 Nov, 2025 | Brian Jg Pereira | Class A Common Stock | D | 227,431 | $2.72 | 447,803 | I | S |
| 12 Nov, 2025 | Brian Jg Pereira | Class A Common Stock | D | 27,595 | $2.72 | 54,333 | I | S |
| 12 Nov, 2025 | Brian Jg Pereira | Class A Common Stock | D | 27,595 | $2.72 | 54,333 | I | S |
| 13 Nov, 2025 | Brian Jg Pereira | Class A Common Stock | D | 447,803 | $2.37 | 0 | I | S |
| 13 Nov, 2025 | Brian Jg Pereira | Class A Common Stock | D | 447,803 | $2.37 | 0 | I | S |
| 13 Nov, 2025 | Brian Jg Pereira | Class A Common Stock | D | 54,333 | $2.37 | 0 | I | S |
| 13 Nov, 2025 | Brian Jg Pereira | Class A Common Stock | D | 54,333 | $2.37 | 0 | I | S |
| 08 Jul, 2025 | Darin J. Weber | Class A Common Stock | D | 103,480 | $3.02 | 0 | D | S |
| 08 Jul, 2025 | Darin J. Weber | Class A Common Stock | D | 103,480 | $3.02 | 0 | D | S |
| 03 Jun, 2025 | Pablo G. Legorreta | Class A Ordinary Shares | A | 3,823,996 | $0.00 | 26,441,905 | I | C |
| 03 Jun, 2025 | Pablo G. Legorreta | Class A Ordinary Shares | D | 3,823,996 | $0.00 | 22,617,909 | I | J |
| 03 Jun, 2025 | Pablo G. Legorreta | Class B Ordinary Shares | D | 3,823,996 | $0.00 | 84,283,430 | I | C |
| 03 Jun, 2025 | Pablo G. Legorreta | Common Units in ProKidney LP | D | 3,823,996 | $0.00 | 84,283,430 | I | C |
| 29 May, 2025 | Uma Sinha | Director stock option (right to buy) | A | 125,862 | $0.00 | 125,862 | D | A |