Jane Street
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Jane Street’s ASP Isotopes ASPI Stock Holding History

Jane Street’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
2026
Q2 		$4.85M Buy
780,200
+614,000
+369% +$3.61M ﹤0.01% 3761
2026
Q1 		$735K Buy
166,200
+29,800
+22% +$176K ﹤0.01% 7168
2025
Q4 		$730K Sell
136,400
-228,000
-63% -$1.81M ﹤0.01% 6861
2025
Q3 		$3.51M Buy
364,400
+256,200
+237% +$2.36M ﹤0.01% 3970
2025
Q2 		$796K Buy
108,200
+37,600
+53% +$252K ﹤0.01% 6036
2025
Q1 		$331K Buy
70,600
+21,900
+45% +$109K ﹤0.01% 7631
2024
Q4 		$221K Buy
+48,700
New +$259K ﹤0.01% 8251

Other funds holding ASPI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
ECA
Encompass Capital Advisors New York $2.81B AUM 198.36% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
RIM
Rovida Investment Management Grand Cayman, Cayman Islands $1.47B AUM 142.45% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
ETC
Exchange Traded Concepts Oklahoma City, Oklahoma $21.9B AUM 68.6% 1-Year Est. Return
AIC
AWM Investment Company New York $1.15B AUM 201.65% 1-Year Est. Return

Jane Street's ASPI Position: Q2 2026 in Review

Jane Street reduced its ASP Isotopes (ASPI) stake by 97% in Q2 2026, selling an estimated $3.9M and leaving 21,094 shares worth $131K. The position accounts for ﹤0.01% of the portfolio, ranked #10446.

Jane Street first reported a position in ASPI in Q1 2024 and has held it in 8 quarters since. The position peaked at $11.7M in Q3 2025. 185 funds tracked by Wall St. Rank hold ASPI as of Q2 2026.

  • Jane Street held 21,094 shares of ASP Isotopes worth $131K as of Q2 2026.
  • Jane Street sold 663,385 ASP Isotopes shares in Q2 2026, an estimated $3.9M.
  • ASP Isotopes made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #10446 holding.
  • Jane Street first reported a position in ASP Isotopes in Q1 2024 and has held it in 8 quarters since.
  • Jane Street's ASP Isotopes position peaked at $11.7M in Q3 2025.
  • 185 funds tracked by Wall St. Rank held ASP Isotopes as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.