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 Q3	$227K	Buy	22,300 +4,200	+23%	+$38.9K	﹤0.01%	9803
2026 Q2	$279K	Buy	+18,100	New	+$291K	﹤0.01%	9373

Other funds holding SPAX

StoneX Group New York $2.75B AUM 24.13% 1-Year Est. Return

Jump Financial Chicago, Illinois $13.9B AUM 45.06% 1-Year Est. Return

SBI Securities Tokyo, Japan $4.38B AUM 56.37% 1-Year Est. Return

IMC Chicago Chicago, Illinois $483B AUM 41.26% 1-Year Est. Return

UBS Group Zurich, Switzerland $765B AUM 28.39% 1-Year Est. Return

Jane Street's SPAX Position: Q3 2026 in Review

Jane Street increased its T-REX 2X Long SPCX Daily Target ETF (SPAX) stake by 539% in Q3 2026, buying an estimated $549K and bringing the position to 70,317 shares worth $717K. The position accounts for ﹤0.01% of the portfolio, ranked #7193.

Jane Street first reported a position in SPAX in Q2 2026 and has held it in 2 quarters since. 6 funds tracked by Wall St. Rank hold SPAX as of Q3 2026.

Jane Street held 70,317 shares of T-REX 2X Long SPCX Daily Target ETF worth $717K as of Q3 2026.
Jane Street bought 59,309 T-REX 2X Long SPCX Daily Target ETF shares in Q3 2026, an estimated $549K.
T-REX 2X Long SPCX Daily Target ETF made up ﹤0.01% of Jane Street's portfolio in Q3 2026, its #7193 holding.
Jane Street first reported a position in T-REX 2X Long SPCX Daily Target ETF in Q2 2026 and has held it in 2 quarters since.
6 funds tracked by Wall St. Rank held T-REX 2X Long SPCX Daily Target ETF as of Q3 2026.

Based on Jane Street's 13F filing for Q3 2026, filed 12 Nov 2026.