Jane Street
SPAX

Jane Street’s T-REX 2X Long SPCX Daily Target ETF SPAX Stock Holding History

Jane Street’s Portfolio SPAX Stock Details SPAX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$298K Buy
+19,300
New +$310K ﹤0.01% 9231

Other funds holding SPAX

JF
Jump Financial Chicago, Illinois $12.4B AUM 62.79% 1-Year Est. Return
Optiver Holding
Optiver Holding Amsterdam, Netherlands $371B AUM 64.6% 1-Year Est. Return
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $1.28T AUM 58.89% 1-Year Est. Return
SS
SBI Securities Tokyo, Japan $4.4B AUM 74.26% 1-Year Est. Return
SRL
Scientech Research LLC Jersey City, New Jersey $123M AUM 198.31% 1-Year Est. Return
HF
HRT Financial New York $54.8B AUM 81.03% 1-Year Est. Return
Simplex Trading
Simplex Trading Chicago, Illinois $171B AUM 85% 1-Year Est. Return
NS
NBC Securities Birmingham, Alabama $1.48B AUM 31.07% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Jane Street's SPAX Position: Q2 2026 in Review

Jane Street opened a new position in T-REX 2X Long SPCX Daily Target ETF (SPAX) in Q2 2026: 11,008 shares worth $170K. The stake represents ﹤0.01% of the portfolio and ranks #10252 among its holdings.

10 funds tracked by Wall St. Rank hold SPAX as of Q2 2026.

  • Jane Street held 11,008 shares of T-REX 2X Long SPCX Daily Target ETF worth $170K as of Q2 2026.
  • T-REX 2X Long SPCX Daily Target ETF was a new Jane Street position in Q2 2026.
  • T-REX 2X Long SPCX Daily Target ETF made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #10252 holding.
  • 10 funds tracked by Wall St. Rank held T-REX 2X Long SPCX Daily Target ETF as of Q2 2026.

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