PROK · Insider Trading
ProKidney Corp. Class A Ordinary Shares
Every open-market purchase and sale reported by PROK officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-20 | Brian JG Pereira | Director | Sell | −757,164 | −$1.07M |
| 2026-08-06 | Brian JG Pereira | Director | C | +757,164 | — |
| 2026-08-06 | Brian JG Pereira | Director | C | +757,164 | — |
| 2026-07-06 | Kenneth Thomas Locke | Chief Technical Officer | A | +750,000 deriv. | — |
| 2026-06-15 | Todd C Girolamo | Chief Legal Officer | C | +163,857 | — |
| 2026-05-29 | Brian JG Pereira | Director | A | +135,000 deriv. | — |
| 2026-05-29 | William F Doyle | Director | A | +135,000 deriv. | — |
| 2026-05-29 | Pablo G. Legorreta | Director | A | +135,000 deriv. | — |
| 2026-05-29 | Alan Lotvin | Director | A | +135,000 deriv. | — |
| 2026-05-29 | Santos Jose Ignacio Jimenez | Director | A | +135,000 deriv. | — |
| 2026-05-29 | Uma Sinha | Director | A | +135,000 deriv. | — |
| 2026-05-29 | Jennifer A. Fox | Director | A | +135,000 deriv. | — |
| 2026-03-03 | Darin J. Weber | Chief Regulatory Officer | A | +400,000 deriv. | — |
| 2026-03-03 | Bruce Culleton | Chief Executive Officer | A | +3,000,000 deriv. | — |
| 2026-03-03 | Todd C Girolamo | Chief Legal Officer | A | +600,000 deriv. | — |
| 2026-03-03 | James Coulston | Chief Financial Officer | A | +600,000 deriv. | — |
| 2025-11-14 | Brian JG Pereira | Director | Sell | −757,162 | −$1.88M |
| 2025-07-09 | Darin J. Weber | Chief Regulatory Officer | Sell | −103,480 | −$312.51K |
| 2025-06-05 | Tolerantia, LLC | 10%+ Owner | MIXED | — | — |
| 2025-06-02 | Brian JG Pereira | Director | A | +125,862 deriv. | — |
| 2025-06-02 | William F Doyle | Director | A | +125,862 deriv. | — |
| 2025-06-02 | Uma Sinha | Director | A | +125,862 deriv. | — |
| 2025-06-02 | Santos Jose Ignacio Jimenez | Director | A | +125,862 deriv. | — |
| 2025-06-02 | Alan Lotvin | Director | A | +125,862 deriv. | — |
| 2025-06-02 | Pablo G. Legorreta | Director | A | +125,862 deriv. | — |
| 2025-06-02 | Jennifer A. Fox | Director | A | +125,862 deriv. | — |
| 2025-04-24 | Control Empresarial de Capitales S.A. de C.V. | 10%+ Owner | Buy | +387,393 | +$276.37K |
| 2025-04-21 | Control Empresarial de Capitales S.A. de C.V. | 10%+ Owner | Buy | +25,000 | +$18.69K |
| 2025-04-18 | Control Empresarial de Capitales S.A. de C.V. | 10%+ Owner | Buy | +100,000 | +$74.82K |
| 2025-04-16 | Control Empresarial de Capitales S.A. de C.V. | 10%+ Owner | Buy | +736,105 | +$520.60K |
| 2025-04-14 | Control Empresarial de Capitales S.A. de C.V. | 10%+ Owner | Buy | +1,034,118 | +$628.85K |
| 2025-03-04 | Bruce Culleton | Chief Executive Officer | A | +1,796,000 deriv. | — |
| 2025-03-04 | James Coulston | Chief Financial Officer | A | +650,000 deriv. | — |
| 2025-03-04 | Darin J. Weber | Chief Regulatory Officer | A | +450,000 deriv. | — |
| 2025-03-04 | Todd C Girolamo | Chief Legal Officer | A | +650,000 deriv. | — |
| 2025-02-06 | Brian JG Pereira | Director | C | +757,162 | — |
| 2025-02-06 | Pablo G. Legorreta | Director | MIXED | — | — |
| 2024-09-20 | Darin J. Weber | Chief Regulatory Officer | Sell | −16,412 | −$41.03K |
| 2024-09-16 | Bruce Culleton | Chief Executive Officer | A | +500,000 deriv. | — |
| 2024-09-04 | Jennifer A. Fox | Director | A | +9,535 deriv. | — |
| 2024-08-02 | Todd C Girolamo | Chief Legal Officer | C | +81,928 | — |
| 2024-07-29 | Darin J. Weber | Chief Regulatory Officer | Sell | −826 | −$2.06K |
| 2024-06-25 | Control Empresarial de Capitales S.A. de C.V. | 10%+ Owner | Buy | +8,264,462 | +$20.00M |
| 2024-06-20 | Darin J. Weber | Chief Regulatory Officer | Sell | −17,238 | −$48.62K |
| 2024-06-14 | Tolerantia, LLC | 10%+ Owner | Buy | +45,235,818 | +$109.47M |
| 2024-06-03 | Jennifer A. Fox | Director | A | +62,558 deriv. | — |
| 2024-06-03 | Uma Sinha | Director | A | +62,558 deriv. | — |
| 2024-06-03 | Brian JG Pereira | Director | A | +62,558 deriv. | — |
| 2024-06-03 | Santos Jose Ignacio Jimenez | Director | A | +62,558 deriv. | — |
| 2024-06-03 | William F Doyle | Director | A | +62,558 deriv. | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Control Empresarial de Capitales S.A. de C.V. | 10%+ Owner | 73,842,723 | $102.27M |
| Pablo G. Legorreta | Director | 22,617,909 | $31.33M |
| Tolerantia, LLC | 10%+ Owner | 22,617,909 | $31.33M |
| Todd C Girolamo | Chief Legal Officer | 327,713 | $453.88K |
| Brian JG Pereira | Director | 27,052 | $37.47K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the PROK quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.