Equibles

PROK

Prokidney Corp.

Company with tickers: PROK

CIK
1850270
CUSIP
74291D104
Shares Outstanding
205,199,713
13F Activity (30d)
67 filings 67 filers
Holders: 70
Total Value: $76,480,504
Total Shares: 42,726,560

Institutional Ownership Trend

4 quarters

Holder Concentration

Across 70 13F filers · Δ vs Dec 31, 2025
Top Holder
28.9%
Jun 2025 → Mar 2026 · range 28.9% – 88.0%
−0.4 pts
Top 5
64.1%
Jun 2025 → Mar 2026 · range 63.6% – 100.0%
+0.5 pts
Top 10
79.6%
Jun 2025 → Mar 2026 · range 79.4% – 100.0%
+0.2 pts
HHI
1,412
Jun 2025 → Mar 2026 · range 1,412 – 7,879
Broadly held −14

Quarterly Activity

vs Dec 31, 2025
New
17
Increased
19
Decreased
22
Sold Out
8
Unchanged
12
Holder count: +9
Institutional value: -19.1%
Shares held: +1.3%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega MILLENNIUM MANAGEMENT LLC +437,041 2,271,577
Large MARSHALL WACE, LLP +399,259 1,011,744
Large RENAISSANCE TECHNOLOGIES LLC +355,089 1,250,794
Mega MORGAN STANLEY +138,966 8,955,967
Large ExodusPoint Capital Management, LP +125,500 254,353

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega CITADEL ADVISORS LLC −412,597 22,300
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP −322,892 204,488
Mega GOLDMAN SACHS GROUP INC −259,259 421,902
Mega JANE STREET GROUP, LLC −232,864 313,285
Large Squarepoint Ops LLC −140,314 211,107

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 1,146,937 $2,053,017
Mega VANGUARD FIDUCIARY TRUST CO 538,371 $963,684
Large HRT FINANCIAL LP 118,981 $212,975
Mid Voleon Capital Management LP 102,698 $183,829
Mid Brevan Howard Capital Management LP 64,153 $114,833

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 1,648,229 $3,692,032
Mid Lighthouse Investment Partners, LLC 48,060 $107,654
Mid GROUP ONE TRADING LLC 28,021 $62,767
Large Cetera Investment Advisers 12,288 $27,525
Large TWO SIGMA ADVISERS, LP 10,900 $24,416
Filter: New 17 Increased 19 Reduced 22 Sold out 8 Unchanged 12
Showing 72 of 72
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mid SUVRETTA CAPITAL MANAGEMENT, LLC $22,090,866 28.88% 12,341,266
Mega MORGAN STANLEY $16,031,178 20.96% 8,955,967
Mega MILLENNIUM MANAGEMENT LLC $4,066,122 5.32% 2,271,577
Small Bleichroeder LP $3,580,000 4.68% 2,000,000
Small Artia Global Partners LP $3,234,420 4.23% 1,806,939
Mid Hennion & Walsh Asset Management, Inc. $2,884,930 3.77% 1,611,693
Mega BlackRock, Inc. $2,482,935 3.25% 1,387,116
Large RENAISSANCE TECHNOLOGIES LLC $2,238,921 2.93% 1,250,794
Mega GEODE CAPITAL MANAGEMENT, LLC $2,202,431 2.88% 1,230,409
Mega VANGUARD CAPITAL MANAGEMENT LLC $2,053,017 2.68% 1,146,937
Large MARSHALL WACE, LLP $1,811,021 2.37% 1,011,744
Mega BANK OF AMERICA CORP /DE/ Bank $1,348,607 1.76% 753,412
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $1,123,710 1.47% 627,771
Mega STATE STREET CORP $996,752 1.30% 556,845
Mega VANGUARD FIDUCIARY TRUST CO Bank $963,684 1.26% 538,371
Large Woodline Partners LP $895,000 1.17% 500,000
Small MYDA Advisors LLC $767,507 1.00% 428,775
Mega GOLDMAN SACHS GROUP INC $755,204 0.99% 421,902
Mega TWO SIGMA INVESTMENTS, LP $620,023 0.81% 346,382
Mega UBS Group AG $598,836 0.78% 334,546
Mega Amundi $522,157 0.68% 291,708
Mega JANE STREET GROUP, LLC $473,069 0.62% 264,285
Large ExodusPoint Capital Management, LP $455,291 0.60% 254,353
Mega NORTHERN TRUST CORP Bank $432,428 0.57% 241,580
Large Squarepoint Ops LLC $377,881 0.49% 211,107
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $366,033 0.48% 204,488
Mid GSA CAPITAL PARTNERS LLP $363,774 0.48% 203,226
Mega BARCLAYS PLC $261,847 0.34% 146,284
Small Virtus Investment Advisers, LLC $220,864 0.29% 123,388
Large HRT FINANCIAL LP $212,975 0.28% 118,981
Mid Voleon Capital Management LP $183,829 0.24% 102,698
Mid Susquehanna Portfolio Strategies, LLC $174,306 0.23% 97,378
Small EntryPoint Capital, LLC $148,322 0.19% 82,862
Large OMERS ADMINISTRATION Corp $121,541 0.16% 67,900
Large Point72 Asset Management, L.P. $117,384 0.15% 65,578
Mid Brevan Howard Capital Management LP $114,833 0.15% 64,153
Large Hudson Bay Capital Management LP $111,130 0.15% 62,084
Large Jain Global LLC $91,835 0.12% 51,305
Mega CITIGROUP INC $88,397 0.12% 49,384
Small Diametric Capital, LP $85,610 0.11% 47,827
Small Catalyst Funds Management Pty Ltd $85,562 0.11% 47,800
Large Jefferies Financial Group Inc. $83,052 0.11% 46,398
Mega JANE STREET GROUP, LLC $65,156 0.09% 36,400
Mega Vanguard Global Advisers, LLC $60,992 0.08% 34,074
Large Schonfeld Strategic Advisors LLC $58,792 0.08% 32,845
Micro Virtus Family Office LLC Family Office $49,225 0.06% 27,500
Mega CITADEL ADVISORS LLC $39,917 0.05% 22,300
Mid Tower Research Capital LLC (TRC) $36,585 0.05% 20,439
Mid Jump Financial, LLC $33,186 0.04% 18,540
Mid LETKO, BROSSEAU & ASSOCIATES INC $28,461 0.04% 15,900
Mid SummitTX Capital, L.P. $26,134 0.03% 14,600
Small R Squared Ltd $24,515 0.03% 13,696
Micro CTC Alternative Strategies, Ltd. $24,080 0.03% 13,453
Mid Callan Family Office, LLC Family Office $23,975 0.03% 13,394
Mega JANE STREET GROUP, LLC $22,554 0.03% 12,600
Large LMR Partners LLP $22,346 0.03% 12,484
Mid PRELUDE CAPITAL MANAGEMENT, LLC $21,671 0.03% 12,107
Mega VICTORY CAPITAL MANAGEMENT INC $21,172 0.03% 11,828
Mega Bank of New York Mellon Corp Bank $20,032 0.03% 11,192
Small Caitong International Asset Management Co., Ltd $19,675 0.03% 10,992
Mega FMR LLC $18,354 0.02% 10,254
Mid SIMPLEX TRADING, LLC $12,066 0.02% 6,741
Mega BNP PARIBAS ARBITRAGE, SA $7,376 0.01% 4,121
Small FNY Investment Advisers, LLC $1,790 0.00% 1,000
Large OSAIC HOLDINGS, INC. $1,700 0.00% 950
Mega JPMORGAN CHASE & CO $1,353 0.00% 756
Large CWM, LLC $814 0.00% 455
Mid SBI Securities Co., Ltd. Broker-Dealer $537 0.00% 300
Mega ROYAL BANK OF CANADA Bank $340 0.00% 190
Large JONES FINANCIAL COMPANIES LLLP $179 0.00% 100
Mid SIGNATUREFD, LLC $134 0.00% 75
Mid Arax Advisory Partners $109 0.00% 61

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