PROK
ProKidney Corp.
NASDAQ: PROK · HEALTHCARE · BIOTECHNOLOGY
$1.52
+0.33% today
Updated 2026-10-28
Market cap
$562.85M
P/E ratio
—
P/S ratio
688.08x
EPS (TTM)
$-0.55
Dividend yield
—
52W range
$1 – $3
Volume
1.4M
ProKidney Corp. (PROK) Insider transactions
Net insider activity
Net selling (25,727,361 shares)
Buy transactions
60
Sell transactions
40
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-08-20 | PEREIRA, BRIAN JG | Director | Sale | 222,948 | $1.42 | $316563.87 |
| 2026-08-20 | PEREIRA, BRIAN JG | Director | Sale | 27,052 | $1.42 | $38411.13 |
| 2026-08-19 | PEREIRA, BRIAN JG | Director | Sale | 222,949 | $1.44 | $321202.62 |
| 2026-08-19 | PEREIRA, BRIAN JG | Director | Sale | 27,051 | $1.44 | $38972.38 |
| 2026-08-18 | PEREIRA, BRIAN JG | Director | Sale | 229,338 | $1.37 | $314468.27 |
| 2026-08-18 | PEREIRA, BRIAN JG | Director | Sale | 27,826 | $1.37 | $38155.01 |
| 2026-08-04 | PEREIRA, BRIAN JG | Director | Sale | 675,235 | — | — |
| 2026-08-04 | PEREIRA, BRIAN JG | Director | Sale | 81,929 | — | — |
| 2026-08-04 | PEREIRA, BRIAN JG | Director | Sale | 675,235 | — | — |
| 2026-08-04 | PEREIRA, BRIAN JG | Director | Sale | 81,929 | — | — |
| 2026-08-04 | PEREIRA, BRIAN JG | Director | Buy | 675,235 | — | — |
| 2026-08-04 | PEREIRA, BRIAN JG | Director | Buy | 81,929 | — | — |
| 2026-07-01 | LOCKE, KENNETH THOMAS | Chief Technical Officer | Buy | 750,000 | — | — |
| 2026-06-12 | GIROLAMO, TODD C | Chief Legal Officer | Sale | 163,857 | — | — |
| 2026-06-12 | GIROLAMO, TODD C | Chief Legal Officer | Sale | 163,857 | — | — |
| 2026-06-12 | GIROLAMO, TODD C | Chief Legal Officer | Buy | 163,857 | — | — |
| 2026-05-28 | SINHA, UMA | Director | Buy | 135,000 | — | — |
| 2026-05-28 | PEREIRA, BRIAN JG | Director | Buy | 135,000 | — | — |
| 2026-05-28 | LOTVIN, ALAN | Director | Buy | 135,000 | — | — |
| 2026-05-28 | LEGORRETA, PABLO G. | Director, 10% Owner | Buy | 135,000 | — | — |
| 2026-05-28 | JIMENEZ, SANTOS JOSE IGNACIO | Director | Buy | 135,000 | — | — |
| 2026-05-28 | FOX, JENNIFER A. | Director | Buy | 135,000 | — | — |
| 2026-05-28 | DOYLE, WILLIAM F | Director | Buy | 135,000 | — | — |
| 2026-04-28 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Sale | 63,118,645 | — | — |
| 2026-04-28 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Sale | 63,118,645 | — | — |
| 2026-04-28 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 63,118,645 | — | — |
| 2026-03-01 | WEBER, DARIN J. | Chief Regulatory Officer | Buy | 400,000 | — | — |
| 2026-03-01 | GIROLAMO, TODD C | Chief Legal Officer | Buy | 600,000 | — | — |
| 2026-03-01 | CULLETON, BRUCE | Director, Chief Executive Officer | Buy | 3,000,000 | — | — |
| 2026-03-01 | COULSTON, JAMES | Chief Financial Officer | Buy | 600,000 | — | — |
| 2025-11-13 | PEREIRA, BRIAN JG | Director | Sale | 447,803 | $2.37 | $1.06M |
| 2025-11-13 | PEREIRA, BRIAN JG | Director | Sale | 54,333 | $2.37 | $128769.21 |
| 2025-11-12 | PEREIRA, BRIAN JG | Director | Sale | 227,431 | $2.72 | $619362.84 |
| 2025-11-12 | PEREIRA, BRIAN JG | Director | Sale | 27,595 | $2.72 | $75152.22 |
| 2025-07-08 | WEBER, DARIN J. | Chief Regulatory Officer | Sale | 103,480 | $3.02 | $312509.60 |
| 2025-06-03 | LEGORRETA, PABLO G. | Director, 10% Owner | Sale | 3,823,996 | — | — |
| 2025-06-03 | LEGORRETA, PABLO G. | Director, 10% Owner | Sale | 3,823,996 | — | — |
| 2025-06-03 | LEGORRETA, PABLO G. | Director, 10% Owner | Buy | 3,823,996 | — | — |
| 2025-05-29 | SINHA, UMA | Director | Buy | 125,862 | — | — |
| 2025-05-29 | PEREIRA, BRIAN JG | Director | Buy | 125,862 | — | — |
| 2025-05-29 | LOTVIN, ALAN | Director | Buy | 125,862 | — | — |
| 2025-05-29 | LEGORRETA, PABLO G. | Director, 10% Owner | Buy | 125,862 | — | — |
| 2025-05-29 | JIMENEZ, SANTOS JOSE IGNACIO | Director | Buy | 125,862 | — | — |
| 2025-05-29 | FOX, JENNIFER A. | Director | Buy | 125,862 | — | — |
| 2025-05-29 | DOYLE, WILLIAM F | Director | Buy | 125,862 | — | — |
| 2025-04-22 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 387,393 | $0.71 | $276366.17 |
| 2025-04-17 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 25,000 | $0.75 | $18690.00 |
| 2025-04-16 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 100,000 | $0.75 | $74820.00 |
| 2025-04-15 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 468,000 | $0.70 | $326008.80 |
| 2025-04-14 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 268,105 | $0.73 | $194590.61 |
| 2025-04-11 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 1,900 | $0.61 | $1155.39 |
| 2025-04-10 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 1,032,218 | $0.61 | $627691.77 |
| 2025-03-01 | WEBER, DARIN J. | Chief Regulatory Officer | Buy | 450,000 | — | — |
| 2025-03-01 | GIROLAMO, TODD C | Chief Legal Officer | Buy | 650,000 | — | — |
| 2025-03-01 | CULLETON, BRUCE | Director, Chief Executive Officer | Buy | 1,796,000 | — | — |
| 2025-03-01 | COULSTON, JAMES | Chief Financial Officer | Buy | 650,000 | — | — |
| 2025-02-04 | PEREIRA, BRIAN JG | Director | Sale | 675,234 | — | — |
| 2025-02-04 | PEREIRA, BRIAN JG | Director | Sale | 81,928 | — | — |
| 2025-02-04 | PEREIRA, BRIAN JG | Director | Sale | 675,234 | — | — |
| 2025-02-04 | PEREIRA, BRIAN JG | Director | Sale | 81,928 | — | — |
| 2025-02-04 | PEREIRA, BRIAN JG | Director | Buy | 675,234 | — | — |
| 2025-02-04 | PEREIRA, BRIAN JG | Director | Buy | 81,928 | — | — |
| 2025-02-04 | LEGORRETA, PABLO G. | Director, 10% Owner | Sale | 532,535 | — | — |
| 2025-02-04 | LEGORRETA, PABLO G. | Director, 10% Owner | Sale | 532,535 | — | — |
| 2025-02-04 | LEGORRETA, PABLO G. | Director, 10% Owner | Sale | 532,535 | — | — |
| 2024-09-19 | WEBER, DARIN J. | Chief Regulatory Officer | Sale | 16,412 | $2.50 | $41030.00 |
| 2024-09-13 | CULLETON, BRUCE | Director, Chief Executive Officer | Buy | 500,000 | — | — |
| 2024-09-03 | FOX, JENNIFER A. | Director | Buy | 9,535 | — | — |
| 2024-07-31 | GIROLAMO, TODD C | Chief Legal Officer | Sale | 81,928 | — | — |
| 2024-07-31 | GIROLAMO, TODD C | Chief Legal Officer | Sale | 81,928 | — | — |
| 2024-07-31 | GIROLAMO, TODD C | Chief Legal Officer | Buy | 81,928 | — | — |
| 2024-07-26 | WEBER, DARIN J. | Chief Regulatory Officer | Sale | 826 | $2.50 | $2065.00 |
| 2024-06-18 | WEBER, DARIN J. | Chief Regulatory Officer | Sale | 17,238 | $2.82 | $48616.33 |
| 2024-06-13 | LEGORRETA, PABLO G. | Director, 10% Owner | Buy | 22,617,909 | $2.42 | $54.74M |
| 2024-06-11 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 8,264,462 | $2.42 | $20.00M |
| 2024-05-30 | SINHA, UMA | Director | Buy | 62,558 | — | — |
| 2024-05-30 | PEREIRA, BRIAN JG | Director | Buy | 62,558 | — | — |
| 2024-05-30 | LOTVIN, ALAN | Director | Buy | 62,558 | — | — |
| 2024-05-30 | LEGORRETA, PABLO G. | Director | Buy | 62,558 | — | — |
| 2024-05-30 | JIMENEZ, SANTOS JOSE IGNACIO | Director | Buy | 62,558 | — | — |
| 2024-05-30 | FOX, JENNIFER A. | Director | Buy | 62,558 | — | — |
| 2024-05-30 | DOYLE, WILLIAM F | Director | Buy | 62,558 | — | — |
| 2024-05-20 | WEBER, DARIN J. | Chief Regulatory Officer | Sale | 17,238 | $4.08 | $70386.20 |
| 2024-04-22 | WEBER, DARIN J. | SVP of Regulatory Development | Sale | 16,438 | $2.51 | $41315.27 |
| 2024-04-18 | WEBER, DARIN J. | SVP of Regulatory Development | Sale | 800 | $2.54 | $2028.00 |
| 2024-04-16 | WEBER, DARIN J. | SVP of Regulatory Development | Sale | 17,238 | $2.50 | $43095.00 |
| 2024-04-12 | WEBER, DARIN J. | SVP of Regulatory Development | Sale | 84,103 | $1.73 | $145498.19 |
| 2024-04-01 | WEBER, DARIN J. | SVP of Regulatory Development | Sale | 300 | $1.69 | $507.00 |
| 2024-04-01 | ERNST, ULRICH PETER ALFRED | EVP, Technical Operations | Buy | 335,000 | — | — |
| 2024-03-25 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 30,000 | $1.43 | $42954.00 |
| 2024-03-22 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 14,000 | $1.40 | $19586.00 |
| 2024-03-20 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 33,000 | $1.40 | $46110.90 |
| 2024-03-14 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 50,000 | $1.36 | $67925.00 |
| 2024-03-13 | CONTROL, EMPRESARIAL DE CAPITALES S.A. DE C.V. | 10% Owner, Add'l Rep. Persons-see Ex.99-1 | Buy | 50,000 | $1.50 | $75090.00 |
| 2024-03-01 | WEBER, DARIN J. | SVP of Regulatory Development | Buy | 225,000 | — | — |
| 2024-03-01 | WEBER, DARIN J. | SVP of Regulatory Development | Buy | 117,264 | — | — |
| 2024-03-01 | GIROLAMO, TODD C | Chief Legal Officer | Buy | 300,000 | — | — |
| 2024-03-01 | GIROLAMO, TODD C | Chief Legal Officer | Buy | 234,742 | — | — |
| 2024-03-01 | COULSTON, JAMES | Chief Financial Officer | Buy | 275,000 | — | — |
| 2024-02-05 | WEBER, DARIN J. | SVP of Regulatory Development | Sale | 137,073 | — | — |
Frequently asked questions
Are PROK insiders buying or selling?
Over the transactions on record, PROK insiders have been net buyers, with about $3.66M in stock sold across 40 sales, against 14 open-market purchases.
Does insider selling at PROK mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which PROK insiders are selling the most?
Recent selling is concentrated in a few names. PEREIRA, BRIAN JG accounts for the largest share on record, with about $2.95M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.