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Brian Jg Pereira - DirectorOpen-market sale$314K- Brian Jg Pereira - DirectorOpen-market sale$38K
About PROKIDNEY CORP. (PROK)
PROKIDNEY CORP. is an SEC registrant, filing under CIK 0001850270, classified as biological products (no diagnostic substances). We track it alongside the rest of the Health Care sector.
PROK Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 6 | 757,164 | $1.07M |
| Other acquisition / disposition | 6 | 2,271,492 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
PROK insider transactions (Form 4)
4125 Form 4 filings on record, the earliest from Apr 14, 2025, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Brian Jg Pereira - Director | Open-market sale | Class A Common Stock | 229,338 | $1.37 footnote F1 | $314K | |
| Brian Jg Pereira - Director | Open-market sale | Class A Common Stock | 27,826 | $1.37 footnote F1 | $38K | |
| Brian Jg Pereira - Director | Open-market sale | Class A Common Stock | 222,949 | $1.44 footnote F2 | $321K | |
| Brian Jg Pereira - Director | Open-market sale | Class A Common Stock | 27,051 | $1.44 footnote F2 | $39K | |
| Brian Jg Pereira - Director | Open-market sale | Class A Common Stock | 222,948 | $1.42 footnote F3 | $317K | |
| Brian Jg Pereira - Director | Open-market sale | Class A Common Stock | 27,052 | $1.42 footnote F3 | $38K | |
| ||||||
| Brian Jg Pereira - Director | Other | Class A Common Stock | 81,929 | $0.00 | - | |
| Brian Jg Pereira - Director | Other | Class A Common Stock | 675,235 | $0.00 | - | |
| Brian Jg Pereira - Director | Other | Class B Common Stock | 81,929 | $0.00 | - | |
| Brian Jg Pereira - Director | Other | Common Units in ProKidney Holdings, LLC | 81,929 | $0.00 | - | |
| Brian Jg Pereira - Director | Other | Class B Common Stock | 675,235 | $0.00 | - | |
| Brian Jg Pereira - Director | Other | Common Units in ProKidney Holdings, LLC | 675,235 | $0.00 | - | |
| Kenneth Thomas Locke - Officer | Grant or award | Employee stock option (right to buy) | 750,000 | $0.00 | - | |
 Todd C. Girolamo - Officer | Other | Common Units in ProKidney Holdings, LLC | 163,857 | $0.00 | - | |
| Todd C. Girolamo - Officer | Other | Class A Common Stock | 163,857 | $0.00 | - | |
| Todd C. Girolamo - Officer | Other | Class B Common Stock | 163,857 | $0.00 | - | |
 Alan Lotvin | Grant or award | Director stock option (right to buy) | 135,000 footnote F1 | $0.00 | - | |
| ||||||
| Santos Jose Ignacio Jimenez | Grant or award | Director stock option (right to buy) | 135,000 footnote F1 | $0.00 | - | |
| ||||||
| Jennifer A. Fox | Grant or award | Director stock option (right to buy) | 135,000 footnote F1 | $0.00 | - | |
| ||||||
| William F. Doyle | Grant or award | Director stock option (right to buy) | 135,000 footnote F1 | $0.00 | - | |
| ||||||
| Uma Sinha | Grant or award | Director stock option (right to buy) | 135,000 footnote F1 | $0.00 | - | |
| ||||||
 Pablo G. Legorreta | Grant or award | Director stock option (right to buy) | 135,000 footnote F1 | $0.00 | - | |
| ||||||
| Brian Jg Pereira | Grant or award | Director stock option (right to buy) | 135,000 footnote F1 | $0.00 | - | |
| ||||||
| James Coulston - Officer | Grant or award | Employee stock option (right to buy) | 600,000 | $0.00 | - | |
| Darin J. Weber - Officer | Grant or award | Employee stock option (right to buy) | 400,000 | $0.00 | - | |
| Todd C. Girolamo - Officer | Grant or award | Employee stock option (right to buy) | 600,000 | $0.00 | - | |
| Bruce Culleton - Officer | Grant or award | Employee stock option (right to buy) | 3,000,000 | $0.00 | - | |
| Brian Jg Pereira | Open-market sale | Class A Common Stock | 27,595 | $2.72 footnote F1 | $75K | |
| Brian Jg Pereira | Open-market sale | Class A Common Stock | 447,803 | $2.37 footnote F2 | $1.06M | |
| Brian Jg Pereira | Open-market sale | Class A Common Stock | 54,333 | $2.37 footnote F2 | $129K | |
| Brian Jg Pereira | Open-market sale | Class A Common Stock | 227,431 | $2.72 footnote F1 | $619K | |
| ||||||
| Darin J. Weber - Officer | Open-market sale | Class A Common Stock | 103,480 | $3.02 | $313K | |
| Brian Jg Pereira | Grant or award | Director stock option (right to buy) | 125,862 | $0.00 | - | |
| William F. Doyle | Grant or award | Director stock option (right to buy) | 125,862 | $0.00 | - | |
| Control Empresarial de Capitales S.A. de C.V. | Open-market purchase | Class A Ordinary Shares (as defined in Exhibit 99.1 hereto) | 387,393 | $0.71 | $276K | |
| Control Empresarial de Capitales S.A. de C.V. | Open-market purchase | Class A Ordinary Shares (as defined in Exhibit 99.1 hereto) | 25,000 | $0.75 | $19K | |
| Control Empresarial de Capitales S.A. de C.V. | Open-market purchase | Class A Ordinary Shares (as defined in Exhibit 99.1 hereto) | 100,000 | $0.75 | $75K | |
| Control Empresarial de Capitales S.A. de C.V. | Open-market purchase | Class A Ordinary Shares (as defined in Exhibit 99.1 hereto) | 268,105 | $0.73 | $195K | |
| Control Empresarial de Capitales S.A. de C.V. | Open-market purchase | Class A Ordinary Shares (as defined in Exhibit 99.1 hereto) | 468,000 | $0.70 | $326K | |
| Control Empresarial de Capitales S.A. de C.V. | Open-market purchase | Class A Ordinary Shares (as defined in Exhibit 99.1 hereto) | 1,032,218 | $0.61 | $628K | |
| Control Empresarial de Capitales S.A. de C.V. | Open-market purchase | Class A Ordinary Shares (as defined in Exhibit 99.1 hereto) | 1,900 | $0.61 | $1K | |
Item 2.02, 9.01
Item 5.07
Item 2.02, 7.01, 8.01, 9.01
Item 2.02, 9.01
Recent PROK Form 144 notices of proposed sale
2An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Brian Pereira | Director | 81,929 | $114K | View on EDGAR | |
| Brian Pereira | Director | 675,235 | $945K |
PROK insider trading FAQ
What is the latest insider trade for PROK?
PROKIDNEY CORP. (PROK) had 2 insider filings in the last 90 days, with the most recent on 2026-08-20. The full record for PROK runs to 25 Form 4 filings, the earliest from 2025-04-14. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying PROK stock?
No insider purchases of PROK were filed in the last 90 days. 7 purchases are on record for this company.
How many insiders are selling PROK stock?
6 insider sales of PROK were filed in the last 90 days, totaling $1.07M.
Where can I see PROK SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects PROK Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Health Care companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Brian Jg Pereira view on EDGAR
- - Brian Jg Pereira view on EDGAR
- - Kenneth Thomas Locke view on EDGAR
- - Todd C. Girolamo view on EDGAR
- - Alan Lotvin view on EDGAR
- - Santos Jose Ignacio Jimenez view on EDGAR
- - Jennifer A. Fox view on EDGAR
- - William F. Doyle view on EDGAR
- - Uma Sinha view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Health Care
- Where PROK's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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