Simplex Trading
PROK icon

Simplex Trading’s ProKidney PROK Stock Holding History

Simplex Trading’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
Q1 		$11.1K Sell
6,200
-145,200
-96% -$308K ﹤0.01% 7268
2025
Q4 		$339K Sell
151,400
-26,600
-15% -$70K ﹤0.01% 3699
2025
Q3 		$430K Buy
+178,000
New +$474K ﹤0.01% 4014
2025
Q1 		– Sell
-700
Closed -$1K – 9413
2024
Q4 		$1K Buy
+700
New +$1.26K ﹤0.01% 8291
2024
Q3 		– Sell
-5,700
Closed -$14K – 9337
2024
Q2 		$14K Buy
+5,700
New +$15.3K ﹤0.01% 7205

Other funds holding PROK

SCM
Suvretta Capital Management New York $3.92B AUM 86.67% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
BL
Bleichroeder LP New York $579M AUM 94.36% 1-Year Est. Return
AGP
Artia Global Partners Miami, Florida $499M AUM 186.05% 1-Year Est. Return
HWAM
Hennion & Walsh Asset Management Parsippany, New Jersey $3.5B AUM 41.95% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Simplex Trading's PROK Position: Q1 2026 in Review

Simplex Trading reduced its ProKidney (PROK) stake by 92% in Q1 2026, selling an estimated $168K and leaving 6,741 shares worth $12.1K. The position accounts for ﹤0.01% of the portfolio, ranked #7184.

Simplex Trading first reported a position in PROK in Q3 2023 and has held it in 4 quarters since. The position peaked at $193K in Q4 2025. 71 funds tracked by Wall St. Rank hold PROK as of Q1 2026.

  • Simplex Trading held 6,741 shares of ProKidney worth $12.1K as of Q1 2026.
  • Simplex Trading sold 79,305 ProKidney shares in Q1 2026, an estimated $168K.
  • ProKidney made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #7184 holding.
  • Simplex Trading first reported a position in ProKidney in Q3 2023 and has held it in 4 quarters since.
  • Simplex Trading's ProKidney position peaked at $193K in Q4 2025.
  • 71 funds tracked by Wall St. Rank held ProKidney as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.