ProKidney
PROK
71 hedge funds and large institutions have $78.1M invested in ProKidney in 2026 Q1 according to their latest regulatory filings, with 17 funds opening new positions, 19 increasing their positions, 22 reducing their positions, and 8 closing their positions.
113% more first-time investments, than exits
New positions opened: 17 | Existing positions closed: 8
13% more funds holding
Funds holding: 63 → 71 (+8)
0.42% more ownership
Funds ownership: 30.34% → 30.76% (+0.42%)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
14% less repeat investments, than reductions
Existing positions increased: 19 | Existing positions reduced: 22
18% less call options, than puts
Call options by funds: $74K | Put options by funds: $90K
19% less capital invested
Capital invested by funds: $96.2M → $78.1M (-$18.1M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
+$927K |
| 2 |
Marshall Wace
London,
United Kingdom
|
+$847K |
| 3 |
Renaissance Technologies
New York
|
+$753K |
| 4 |
Morgan Stanley
New York
|
+$295K |
| 5 |
ECM
ExodusPoint Capital Management
New York
|
+$266K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
-$789K |
| 2 |
Goldman Sachs
New York
|
-$550K |
| 3 |
Jane Street
New York
|
-$487K |
| 4 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$412K |
| 5 |
Squarepoint
New York
|
-$298K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
NMC
76
Nine Masts Capital
Central,
Hong Kong
| – | -$22.9K | -10,244 | Closed |
|
77
Wells Fargo
San Francisco,
California
| – | -$6.72K | -3,000 | Closed |
|
78
Royal Bank of Canada
Toronto,
Ontario, Canada
| – | -$1.88K | -887 | -82% |
|
|
GAMC
79
Garner Asset Management Corp
Plano,
Texas
| – | -$1.79K | -800 | Closed |
|
PROK Hedge Fund Activity: Q1 2026 in Review
71 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in ProKidney (PROK) for Q1 2026, worth a combined $78.1M — down 19% from $96.2M a quarter earlier.
Buyers outnumbered sellers: 17 funds opened new PROK positions and 8 closed out — a net gain of 9 holders — while 19 added to existing stakes and 22 trimmed.
The largest buyer was Millennium Management, adding an estimated $927K. The largest seller was Citadel Advisors, exiting entirely with an estimated $789K sold.
- 71 institutional investors held ProKidney (PROK) as of Q1 2026, up from 63 in Q4 2025.
- Funds reported $78.1M of ProKidney stock for Q1 2026, down 19% quarter-over-quarter.
- 17 funds opened new ProKidney positions in Q1 2026 and 8 closed out, a net change of +9 holders.
- The largest ProKidney buyer in Q1 2026 was Millennium Management, an estimated $927K added.
- The largest ProKidney seller in Q1 2026 was Citadel Advisors, an estimated $789K sold.
Based on aggregated 13F filings for Q1 2026.