Jane Street’s Defiance Daily Target 2x Long MSTR ETF MSTX Stock Holding History

Jane Street’s Portfolio MSTX Stock Details MSTX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$1.22M	Buy	163,958 +151,996	+1,271%	+$3.82M	﹤0.01%	6121
2026 Q1	$234K	Buy	+11,962	New	+$359K	﹤0.01%	9787
2025 Q3	–	Sell	-675	Closed	-$213K	–	11997
2025 Q2	$272K	Sell	675 -29,919	-98%	-$10.6M	﹤0.01%	8027
2025 Q1	$7.89M	Buy	30,594 +34	+0.1%	+$12.9K	﹤0.01%	2289
2024 Q4	$10.8M	Buy	30,560 +24,270	+386%	+$17.2M	﹤0.01%	1818
2024 Q3	$1.82M	Buy	+6,290	New	+$1.35M	﹤0.01%	4670

Other funds holding MSTX

StoneX Group New York $2.48B AUM 33.54% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return

Optiver Holding Amsterdam, Netherlands $371B AUM 64.6% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

OMC

Old Mission Capital Chicago, Illinois $6.31B AUM 20.77% 1-Year Est. Return

Mariner Overland Park, Kansas $95.2B AUM 32.92% 1-Year Est. Return

Jump Financial Chicago, Illinois $12.4B AUM 62.79% 1-Year Est. Return

Group One Trading Chicago, Illinois $71.1B AUM 128.96% 1-Year Est. Return

HighTower Advisors Chicago, Illinois $104B AUM 28.3% 1-Year Est. Return

Jane Street's MSTX Position: Q2 2026 in Review

Jane Street increased its Defiance Daily Target 2x Long MSTR ETF (MSTX) stake by 1,271% in Q2 2026, buying an estimated $3.82M and bringing the position to 163,958 shares worth $1.22M. The position accounts for ﹤0.01% of the portfolio, ranked #6121.

Jane Street first reported a position in MSTX in Q3 2024 and has held it in 6 quarters since. The position peaked at $10.8M in Q4 2024. 22 funds tracked by Wall St. Rank hold MSTX as of Q2 2026.

Jane Street held 163,958 shares of Defiance Daily Target 2x Long MSTR ETF worth $1.22M as of Q2 2026.
Jane Street bought 151,996 Defiance Daily Target 2x Long MSTR ETF shares in Q2 2026, an estimated $3.82M.
Defiance Daily Target 2x Long MSTR ETF made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #6121 holding.
Jane Street first reported a position in Defiance Daily Target 2x Long MSTR ETF in Q3 2024 and has held it in 6 quarters since.
Jane Street's Defiance Daily Target 2x Long MSTR ETF position peaked at $10.8M in Q4 2024.
22 funds tracked by Wall St. Rank held Defiance Daily Target 2x Long MSTR ETF as of Q2 2026.

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