Jim Simons
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Jim Simons’s ASP Isotopes ASPI Stock Holding History

Jim Simons’s Portfolio ASPI Stock Details ASPI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-201,200
Closed -$1.94M – 3222
2025
Q3 		$1.94M Buy
+201,200
New +$1.86M ﹤0.01% 2099
2024
Q3 		– Sell
-171,800
Closed -$526K – 3518
2024
Q2 		$526K Buy
171,800
+9,200
+6% +$35.5K ﹤0.01% 2670
2024
Q1 		$672K Buy
162,600
+87,832
+117% +$271K ﹤0.01% 2728
2023
Q4 		$134K Sell
74,768
-26,111
-26% -$38.1K ﹤0.01% 3235
2023
Q3 		$96K Sell
100,879
-378,121
-79% -$390K ﹤0.01% 3256
2023
Q2 		$272K Buy
+479,000
New +$260K ﹤0.01% 3167

Other funds holding ASPI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
RIM
Rovida Investment Management Grand Cayman, Cayman Islands $1.47B AUM 142.45% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
AIC
AWM Investment Company New York $903M AUM 163.47% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

Jim Simons's ASPI Position: Q4 2025 in Review

Jim Simons sold out of ASP Isotopes (ASPI) in Q4 2025, closing a stake of 201,200 shares — an estimated $1.94M sold.

Jim Simons first reported a position in ASPI in Q2 2023 and held it in 6 quarters. The position peaked at $1.94M in Q3 2025. 173 funds tracked by Wall St. Rank hold ASPI as of Q4 2025.

  • Jim Simons reported no remaining ASP Isotopes position as of Q4 2025 after selling out during the quarter.
  • Jim Simons sold 201,200 ASP Isotopes shares in Q4 2025, an estimated $1.94M.
  • Jim Simons first reported a position in ASP Isotopes in Q2 2023 and held it in 6 quarters.
  • Jim Simons's ASP Isotopes position peaked at $1.94M in Q3 2025.
  • 173 funds tracked by Wall St. Rank held ASP Isotopes as of Q4 2025.

Based on Renaissance Technologies's 13F filing for Q4 2025, filed 12 Feb 2026.