PROK · Prokidney Corp. · Holdings
Substantial doubt about the company's ability to continue as a going concern.
“Based on our current operating plan, we do not believe our existing cash and cash equivalents and marketable securities as of June 30, 2026, will be sufficient to fund our obligations for the 12 months following the issuance of the unaudited condensed consolidated financial statements included in this Quarterly Report on Form 10-Q on August 10, 2026. Accordingly, substantial doubt exists about our ability to continue as a going concern within one year after the date the unaudited condensed consolidated financial statements included elsewhere in this Quarterly Report on Form 10-Q are issued.”View the 10-Q filed Aug 10, 2026
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 71 13F filersWho Holds PROK
Last 6 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 70 filers, like-for-like change +12.0%; actively managed books -7.2%; index-like books +48.0%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 53.3% | 31 | +0.8% |
| Adviser | 4.0% | 2 | +17.2% |
| Bank | 6.8% | 10 | +55.5% |
| Insurer | 0.0% | 1 | new |
| Non-US | 0.2% | 4 | +2527.9% |
| Holding company | 32.8% | 6 | +40.8% |
| Exempt adviser | 0.0% | 0 | -100.0% |
| Benefit plan | 0.0% | 0 | -100.0% |
| Broker-dealer | 0.0% | 0 | — |
| Unknown | 2.9% | 16 | -2.0% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 45.8% | 15 | +48.0% |
| Systematic-like | 3.6% | 6 | -52.6% |
| Concentrated | 8.0% | 5 | 0.0% |
| Diversified active | 42.6% | 44 | -0.5% |
| Not measured | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 53.9% | 36 | +42.0% |
| Medium turnover | 35.9% | 17 | +3.4% |
| High turnover | 5.2% | 11 | -59.9% |
| Unknown | 5.0% | 6 | +37.7% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 5.9% | 10 | +12.1% |
| Medium horizon | 18.0% | 13 | +112.9% |
| Long horizon | 49.6% | 44 | +9.9% |
| Unknown | 26.5% | 3 | -13.1% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 10.1% | 11 | +5.9% |
| $1B to $10B | 31.6% | 13 | +3.4% |
| $10B to $100B | 2.8% | 10 | -48.7% |
| $100B or more | 55.4% | 36 | +26.9% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 0.1% | 7 | +31.5% |
| Pooled investment vehicles | 38.1% | 11 | -9.5% |
| Registered funds and BDCs | 10.7% | 6 | +63.2% |
| Insurance companies | 0.0% | 1 | new |
| Governments and sovereign funds | 0.1% | 1 | new |
| Other investment advisers | 0.0% | 0 | — |
| Diversified | 4.3% | 5 | +2.2% |
| Unknown | 46.7% | 39 | +28.3% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 42.1% | 10 | -13.0% |
| Private equity funds | 0.0% | 1 | -99.4% |
| Other private funds | 0.4% | 6 | +329.7% |
| Mixed private funds | 0.1% | 1 | +98.9% |
| Private funds, type not stated | 0.1% | 1 | +199.8% |
| No private funds | 10.7% | 11 | +61.3% |
| Real estate funds | 0.0% | 1 | +201.6% |
| Unknown | 46.7% | 39 | +36.8% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 96.9% | 57 | +14.5% |
| Outside the US | 3.1% | 13 | -33.5% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 1 holder with no observed 2026-06-30 13F.
Conviction and Crowding
70 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 96.1% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shareholder Targets
13F filers that own its peers but not PROK, quarter ended Jun 30, 2026Found through its holder-overlap peers: EYPT, NVDA, GOOGL. 6,654 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | NORGES BANK Non-US, Index-like | $120,567,258,703 2 held | NVDA, GOOGL |
| 2 | Capital Research Global Investors Adviser, Diversified active | $79,921,411,825 2 held | NVDA, GOOGL |
| 3 | Capital World Investors Adviser, Diversified active | $66,206,773,251 2 held | GOOGL, NVDA |
| 4 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser, Index-like | $65,111,478,248 3 held | NVDA, GOOGL, EYPT |
| 5 | WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active | $46,408,517,425 3 held | NVDA, GOOGL, EYPT |
| 6 | Capital International Investors Adviser, Diversified active | $42,743,900,170 2 held | GOOGL, NVDA |
| 7 | Berkshire Hathaway Inc Insurer, Concentrated | $37,764,088,381 1 held | GOOGL |
| 8 | FRANKLIN RESOURCES INC Adviser, Diversified active | $34,438,123,591 3 held | NVDA, GOOGL, EYPT |
| 9 | AMERIPRISE FINANCIAL INC Adviser, Diversified active | $33,823,450,985 3 held | NVDA, GOOGL, EYPT |
| 10 | Fisher Asset Management, LLC Adviser, Diversified active | $33,084,977,776 2 held | NVDA, GOOGL |
Fund Ownership of PROK by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 2.02% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 0.53% | 1,595,693 |
| Index ETFs | 1.49% | 4,516,446 |
| Active ETFs | 0.00% | 1,799 |
| Active funds | 1.30% | 3,920,288 |
| Unclassified | 0.00% | 0 |
| All registered funds | 3.32% | 10,034,226 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mid SUVRETTA CAPITAL MANAGEMENT, LLC Registered adviser | $25,176,182 | 25.92% | 12,341,266 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $20,102,519 | 20.70% | 9,854,178 | Shares | 2026-08-13 | |
| Mega BlackRock, Inc. Holding company | $10,602,341 | 10.91% | 5,197,227 | Shares | 2026-08-07 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $4,875,899 | 5.02% | 2,390,147 | Shares | 2026-08-12 | |
| Small Bleichroeder LP Registered adviser | $4,080,000 | 4.20% | 2,000,000 | Shares | 2026-08-13 | |
| Small Artia Global Partners LP Registered adviser | $3,686,155 | 3.79% | 1,806,939 | Shares | 2026-08-14 | |
| Mid Hennion & Walsh Asset Management, Inc. Adviser | $2,998,877 | 3.09% | 1,806,553 | Shares | 2026-10-13 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $2,397,524 | 2.47% | 1,175,257 | Shares | 2026-08-13 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $2,242,776 | 2.31% | 1,099,400 | Shares | 2026-08-13 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $2,151,598 | 2.22% | 1,054,705 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP Bank | $2,133,727 | 2.20% | 1,045,945 | Shares | 2026-09-22 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $1,594,727 | 1.64% | 781,729 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $1,369,751 | 1.41% | 671,447 | Shares | 2026-08-13 | |
| Mega NORTHERN TRUST CORP Bank | $1,356,246 | 1.40% | 664,827 | Shares | 2026-08-13 | |
| Small MYDA Advisors LLC Registered adviser | $1,307,181 | 1.35% | 640,775 | Shares | 2026-08-13 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $1,289,583 | 1.33% | 632,149 | Shares | 2026-08-13 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $1,112,121 | 1.14% | 545,158 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $1,054,847 | 1.09% | 517,082 | Shares | 2026-08-13 | |
| Mid Voleon Capital Management LP Registered adviser | $965,546 | 0.99% | 473,307 | Shares | 2026-08-14 | |
| Mega Amundi Holding company | $620,468 | 0.64% | 304,151 | Shares | 2026-08-11 | |
| Mid GSA CAPITAL PARTNERS LLP Registered adviser | $615,308 | 0.63% | 301,622 | Shares | 2026-08-06 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $557,448 | 0.57% | 273,259 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $515,928 | 0.53% | 252,906 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $414,131 | 0.43% | 203,006 | Shares | 2026-08-14 | |
| Small Virtus Investment Advisers, LLC Registered adviser | $407,000 | 0.42% | 199,510 | Shares | 2026-08-11 | |
| Mega Bank of New York Mellon Corp Bank | $360,379 | 0.37% | 176,657 | Shares | 2026-08-06 | |
| Large Squarepoint Ops LLC Registered adviser | $227,996 | 0.23% | 111,763 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $206,980 | 0.21% | 101,461 | Shares | 2026-08-11 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $199,716 | 0.21% | 97,900 | Call | 2026-09-02 | |
| Mid Susquehanna Portfolio Strategies, LLC | $198,651 | 0.20% | 97,378 | Shares | 2026-08-14 | |
| Mega FMR LLC Holding company | $171,780 | 0.18% | 84,206 | Shares | 2026-08-13 | |
| Mega DEUTSCHE BANK AG\ Non-US | $153,760 | 0.16% | 75,373 | Shares | 2026-08-07 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $137,214 | 0.14% | 67,262 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $127,500 | 0.13% | 62,500 | Call | 2026-08-14 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $126,559 | 0.13% | 62,039 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $122,808 | 0.13% | 60,200 | Call | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $110,366 | 0.11% | 54,101 | Shares | 2026-08-12 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND | $93,024 | 0.10% | 45,600 | Shares | 2026-07-29 | |
| Mega Invesco Ltd. Adviser | $83,064 | 0.09% | 40,719 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $81,478 | 0.08% | 39,941 | Shares | 2026-08-14 | |
| Small AXQ CAPITAL, LP Registered adviser | $76,357 | 0.08% | 37,430 | Shares | 2026-08-06 | |
| Mega JANE STREET GROUP, LLC | $74,256 | 0.08% | 36,400 | Put | 2026-08-14 | |
| Mega CITIGROUP INC Bank | $72,186 | 0.07% | 35,386 | Shares | 2026-08-03 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $71,077 | 0.07% | 34,842 | Shares | 2026-08-14 | |
| Mega Vanguard Global Advisers, LLC Registered adviser | $69,510 | 0.07% | 34,074 | Shares | 2026-08-13 | |
| Small Abel Hall, LLC | $65,980 | 0.07% | 39,747 | Shares | 2026-10-19 | |
| Mega JPMORGAN CHASE & CO Bank | $65,534 | 0.07% | 32,125 | Shares | 2026-08-12 | |
| Mega CANADA PENSION PLAN INVESTMENT BOARD Non-US | $57,528 | 0.06% | 28,200 | Shares | 2026-08-14 | |
| Small Virtus Family Office LLC Registered adviser | $56,100 | 0.06% | 27,500 | Shares | 2026-08-04 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $54,590 | 0.06% | 26,760 | Shares | 2026-08-14 | |
| Large Police & Firemen's Retirement System of New Jersey | $51,632 | 0.05% | 25,310 | Shares | 2026-07-23 | |
| Mid Aaron Wealth Advisors LLC Registered adviser | $49,247 | 0.05% | 29,667 | Shares | 2026-10-13 | |
| Small R Squared Ltd | $36,356 | 0.04% | 17,822 | Shares | 2026-08-05 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $35,904 | 0.04% | 17,600 | Put | 2026-09-02 | |
| Large INTECH INVESTMENT MANAGEMENT LLC Registered adviser | $34,561 | 0.04% | 16,942 | Shares | 2026-08-10 | |
| Mega BARCLAYS PLC Bank | $32,886 | 0.03% | 16,121 | Shares | 2026-08-14 | |
| Mid LETKO, BROSSEAU & ASSOCIATES INC Registered adviser | $32,436 | 0.03% | 15,900 | Shares | 2026-08-13 | |
| Mid Callan Family Office, LLC Registered adviser | $27,323 | 0.03% | 13,394 | Shares | 2026-08-11 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $25,094 | 0.03% | 12,301 | Shares | 2026-08-13 | |
| Large PRUDENTIAL FINANCIAL INC Insurer | $22,195 | 0.02% | 10,880 | Shares | 2026-08-12 | |
| Large EP Wealth Advisors, LLC Registered adviser | $20,400 | 0.02% | 10,000 | Shares | 2026-08-12 | |
| Mega Legal & General Group Plc | $15,116 | 0.02% | 7,410 | Shares | 2026-08-14 | |
| Mid Ameritas Investment Partners, Inc. Registered adviser | $14,008 | 0.01% | 6,867 | Shares | 2026-08-13 | |
| Mega Russell Investments Group, Ltd. | $12,342 | 0.01% | 6,050 | Shares | 2026-08-06 | |
| Mid Tower Research Capital LLC (TRC) | $9,836 | 0.01% | 4,822 | Shares | 2026-08-11 | |
| Mid Sterling Capital Management LLC Registered adviser | $5,834 | 0.01% | 3,515 | Shares | 2026-10-22 | |
| Mid IFP Advisors, Inc Registered adviser | $5,049 | 0.01% | 3,042 | Shares | 2026-10-16 | |
| Mega ROYAL BANK OF CANADA Bank | $5,010 | 0.01% | 2,456 | Shares | 2026-08-14 | |
| Large Farther Finance Advisors, LLC Registered adviser | $3,250 | 0.00% | 1,958 | Shares | 2026-10-08 | |
| Large OSAIC HOLDINGS, INC. Holding company | $1,938 | 0.00% | 950 | Shares | 2026-08-14 | |
| Small Basecamp Wealth Advisors LLC Registered adviser | $1,195 | 0.00% | 586 | Shares | 2026-08-14 | |
| Mid GAMMA Investing LLC Registered adviser | $806 | 0.00% | 486 | Shares | 2026-10-08 | |
| Mid SBI Securities Co., Ltd. Non-US | $516 | 0.00% | 311 | Shares | 2026-10-22 | |
| Small Caitong International Asset Management Co., Ltd | $456 | 0.00% | 224 | Shares | 2026-08-05 | |
| Large Arax Advisory Partners Registered adviser | $375 | 0.00% | 184 | Shares | 2026-08-10 | |
| Mega JONES FINANCIAL COMPANIES LLLP | $204 | 0.00% | 100 | Shares | 2026-08-14 | |
| Mid SIGNATUREFD, LLC Registered adviser | $124 | 0.00% | 75 | Shares | 2026-10-23 | |
| Small Essential Partners LLC Registered adviser | $39 | 0.00% | 24 | Shares | 2026-10-14 | |
| Mid Root Financial Partners, LLC Registered adviser | $28 | 0.00% | 17 | Shares | 2026-10-21 | |
| Small FNY Investment Advisers, LLC | $1 | 0.00% | 1,000 | Shares | 2026-10-16 |