Prokidney's top three insider shareholders as of September 29, 2026 are Empresarial De Capitales S.A. De C.V. Control (TenPercentOwner, 73.84Mn shares), Empresarial De Capitales S.A. De C.V. Control (TenPercentOwner, 73.84Mn shares), Pablo G. Legorreta (Director, 22.62Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Empresarial De Capitales S.A. De C.V. Control | TenPercentOwner, Other | 147,685,446 | 0 | 147,685,446 | 81.1% | 30 Apr, 2026 |
| 2 | Pablo G. Legorreta | Director, TenPercentOwner | 0 | 22,617,909 | 22,617,909 | 12.4% | 05 Jun, 2025 |
| 3 | Aaron Cowen | TenPercentOwner | 0 | 10,330,850 | 10,330,850 | 5.7% | 04 Apr, 2023 |
| 4 | Brian Jg Pereira | Director | 81,928 | 675,234 | 757,162 | 0.4% | 06 Feb, 2025 |
| 5 | Todd C Girolamo | Chief Legal Officer | 491,569 | 0 | 491,569 | 0.3% | 15 Jun, 2026 |
| 6 | Darin J. Weber | Chief Regulatory Officer | 103,480 | 0 | 103,480 | 0.1% | 20 Sep, 2024 |
| 7 | Uma Sinha | Director | 30,000 | 0 | 30,000 | 0.0% | 13 Jul, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 18 Aug, 2026 | Brian Jg Pereira | Director | Disposed S | 229,338 | $1.37 | $314.47K | 445,897 | Indirect |
| 18 Aug, 2026 | Brian Jg Pereira | Director | Disposed S | 27,826 | $1.37 | $38.16K | 54,103 | Direct |
| 19 Aug, 2026 | Brian Jg Pereira | Director | Disposed S | 222,949 | $1.44 | $321.20K | 222,948 | Indirect |
| 19 Aug, 2026 | Brian Jg Pereira | Director | Disposed S | 27,051 | $1.44 | $38.97K | 27,052 | Direct |
| 20 Aug, 2026 | Brian Jg Pereira | Director | Disposed S | 222,948 | $1.42 | $316.56K | 0 | Indirect |
| 20 Aug, 2026 | Brian Jg Pereira | Director | Disposed S | 27,052 | $1.42 | $38.41K | 0 | Direct |
| 04 Aug, 2026 | Brian Jg Pereira | Director | Acquired C | 81,929 | $0.00 | $0 | 81,929 | Direct |
| 04 Aug, 2026 | Brian Jg Pereira | Director | Acquired C | 675,235 | $0.00 | $0 | 675,235 | Indirect |
| 04 Aug, 2026 | Brian Jg Pereira | Director | Disposed C | 81,929 | $0.00 | $0 | 0 | Direct |
| 04 Aug, 2026 | Brian Jg Pereira | Director | Disposed C | 81,929 | $0.00 | $0 | 0 | Direct |
| 04 Aug, 2026 | Brian Jg Pereira | Director | Disposed C | 675,235 | $0.00 | $0 | 0 | Indirect |
| 04 Aug, 2026 | Brian Jg Pereira | Director | Disposed C | 675,235 | $0.00 | $0 | 0 | Indirect |
| 01 Jul, 2026 | Kenneth Thomas Locke | Chief Technical Officer | Acquired A | 750,000 | $0.00 | $0 | 750,000 | Direct |
| 12 Jun, 2026 | Todd C Girolamo | Chief Legal Officer | Acquired C | 163,857 | $0.00 | $0 | 327,713 | Direct |
| 12 Jun, 2026 | Todd C Girolamo | Chief Legal Officer | Disposed C | 163,857 | $0.00 | $0 | 0 | Direct |
| 12 Jun, 2026 | Todd C Girolamo | Chief Legal Officer | Disposed C | 163,857 | $0.00 | $0 | 0 | Direct |
| 28 May, 2026 | Pablo G. Legorreta | Director, TenPercentOwner | Acquired A | 135,000 | $0.00 | $0 | 135,000 | Direct |
| 28 May, 2026 | Alan Lotvin | Director | Acquired A | 135,000 | $0.00 | $0 | 135,000 | Direct |
| 28 May, 2026 | Brian Jg Pereira | Director | Acquired A | 135,000 | $0.00 | $0 | 135,000 | Direct |
| 28 May, 2026 | William F Doyle | Director | Acquired A | 135,000 | $0.00 | $0 | 135,000 | Direct |