Bruce Culleton - 02 Nov 2026 Form 4 Insider Report for PROKIDNEY CORP. (PROK)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: PROK
Reported as of: 02 Nov 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 03 Nov 2026, 18:52:08 UTC
Prior SEC filing: 03 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Todd Girolamo, attorney in fact

Filing notes and source

Key filing fact

Bruce Culleton filed Form 4 for PROKIDNEY CORP. (PROK) on 03 Nov 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 Nov 2026, 18:52.

Change

Previous filing in this sequence was filed on 03 Mar 2026.
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/ Todd Girolamo, attorney in fact
Signature date: 03 Nov 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
Shares: +500,000
Change %
Price: $0.000000^*
Shares after: 500,000
Date: 02 Nov 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 500,000
Exercise price: $1.69
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

This performance-based stock option was granted on December 3, 2023. On November 2, 2026, the Company's board of directors certified achievement of the performance goal at 100%. In addition to the achievement of the performance goal, the options are subject to time vesting requirements under which 25% vested on November 2, 2026 and the remaining 75% vests in equal installments of 125,000 shares on each of February 15, 2027, May 15, 2027 and August 15, 2027.