Jim Simons
PROK icon

Jim Simons’s ProKidney PROK Stock Holding History

Jim Simons’s Portfolio PROK Stock Details PROK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$2.24M Sell
1,099,400
-151,394
-12% -$277K ﹤0.01% 1898
2026
Q1 		$2.24M Buy
1,250,794
+355,089
+40% +$753K ﹤0.01% 1839
2025
Q4 		$2.01M Buy
895,705
+763,705
+579% +$2.01M ﹤0.01% 1866
2025
Q3 		$319K Sell
132,000
-279,645
-68% -$744K ﹤0.01% 2974
2025
Q2 		$244K Buy
411,645
+253,145
+160% +$197K ﹤0.01% 3109
2025
Q1 		$139K Buy
158,500
+53,300
+51% +$74K ﹤0.01% 3142
2024
Q4 		$178K Buy
105,200
+59,000
+128% +$106K ﹤0.01% 3195
2024
Q3 		$88.7K Buy
+46,200
New +$105K ﹤0.01% 3275
2024
Q2 		– Sell
-95,171
Closed -$156K – 3872
2024
Q1 		$156K Sell
95,171
-24,829
-21% -$36.5K ﹤0.01% 3283
2023
Q4 		$214K Buy
+120,000
New +$257K ﹤0.01% 3113

Other funds holding PROK

Suvretta Capital Management
Suvretta Capital Management New York $5.47B AUM 131.34% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Bleichroeder LP
Bleichroeder LP New York $559M AUM 83.7% 1-Year Est. Return
Hennion & Walsh Asset Management
Hennion & Walsh Asset Management Parsippany, New Jersey $3.42B AUM 25.82% 1-Year Est. Return
Artia Global Partners
Artia Global Partners Miami, Florida $542M AUM 206.64% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Jim Simons's PROK Position: Q2 2026 in Review

Jim Simons reduced its ProKidney (PROK) stake by 12% in Q2 2026, selling an estimated $277K and leaving 1,099,400 shares worth $2.24M. The position accounts for ﹤0.01% of the portfolio, ranked #1898.

Jim Simons first reported a position in PROK in Q4 2023 and has held it in 10 quarters since. 71 funds tracked by Wall St. Rank hold PROK as of Q2 2026.

  • Jim Simons held 1,099,400 shares of ProKidney worth $2.24M as of Q2 2026.
  • Jim Simons sold 151,394 ProKidney shares in Q2 2026, an estimated $277K.
  • ProKidney made up ﹤0.01% of Jim Simons's portfolio in Q2 2026, its #1898 holding.
  • Jim Simons first reported a position in ProKidney in Q4 2023 and has held it in 10 quarters since.
  • 71 funds tracked by Wall St. Rank held ProKidney as of Q2 2026.

Based on Renaissance Technologies's 13F filing for Q2 2026, filed 13 Aug 2026.