Prokidney PROK Insider Ownership

Updated Oct 10, 2026

In the last 12 months, insiders at Prokidney made open-market sales of $2.95 million (1.51Mn shares) and bought no shares on the open market.

• Brian Jg Pereira (Director) led open-market sales of Prokidney stock over the past 12 months with $2.95 million (1.51Mn shares), most recently on August 20, 2026.
• Beyond open-market trades, insiders at Prokidney acquired 64.04Mn shares through option exercises and conversions in the last 12 months.
• Per Business Quant, PROK insiders together hold 185.25Mn shares based on their latest Form 4 filings, down 0.45% from 186.09Mn shares at the end of Q2 2026.
• Indirect holdings, through trusts, partnerships, family members and other entities, make up 57.71% (106.9Mn shares) of Prokidney's insider total, with the other 42.29% (78.35Mn shares) held directly.
• Business Quant counts 8 insiders with holdings in Prokidney stock, among the officers, directors and 10% owners who have filed a Form 4 in the past two years.
• PROK's three largest insider shareholders, per their latest Form 4 filings, are Pablo G. Legorreta (Director and 10% owner, 106.9Mn shares), Control Empresarial de Capitales S.A. de C.V. (10% owner, 73.84Mn shares) and William F. Doyle (Director, 1.51Mn shares).
• Of the shares held by PROK insiders, 57.71% belong to Pablo G. Legorreta.
• Institutions held 23.34% of Prokidney's outstanding shares in their Q2 2026 13F filings.
• A total of 17 Form 4 filings with transactions in Prokidney stock were made over the past 12 months, by 13 insiders.
• These insider figures for Prokidney are based on Form 4 filings through August 20, 2026.