Bruce Culleton - 01 Mar 2026 Form 4 Insider Report for PROKIDNEY CORP. (PROK)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: PROK
Reported as of: 01 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 03 Mar 2026, 07:57:59 UTC
Prior SEC filing: 04 Mar 2025
Source filing: View source filing
Reporting owner signature: /s/ James Coulston, attorney in fact

Key filing fact

Bruce Culleton filed Form 4 for PROKIDNEY CORP. (PROK) on 03 Mar 2026.

Key facts

This page summarizes Bruce Culleton's Form 4 filing for PROKIDNEY CORP. (PROK).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 03 Mar 2026, 07:57.

Change

Previous filing in this sequence was filed on 04 Mar 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001983742 Primary reporting owner

Culleton Bruce

Relationship: Chief Executive Officer, Director
Address: C/O PROKIDNEY CORP, 2000 FRONTIS PLAZA BLVD, SUITE 250, WINSTON SALEM
Signature: /s/ James Coulston, attorney in fact
Signature date: 03 Mar 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

PROK transaction Derivative

Employee stock option (right to buy)

Award

Transaction value: $0
Shares: +3,000,000
Change %
Price: $0.000000
Shares after: 3,000,000
Date: 01 Mar 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 3,000,000
Exercise price: $2.24
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

The option vests in substantially equal monthly installments over the four year period beginning on March 1, 2026.

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