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

Optiver Holding’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	$395K	Buy	53,080 +32,030	+152%	+$805K	﹤0.01%	787
2026 Q1	$412K	Sell	21,050 -12,517	-37%	-$375K	﹤0.01%	681
2025 Q4	$1.29M	Buy	33,567 +32,087	+2,168%	+$3.48M	﹤0.01%	477
2025 Q3	$316K	Sell	1,480 -3,813	-72%	-$1.2M	﹤0.01%	566
2025 Q2	$2.14M	Sell	5,293 -3,206	-38%	-$1.14M	﹤0.01%	269
2025 Q1	$2.19M	Buy	8,499 +7,974	+1,519%	+$3.02M	﹤0.01%	254
2024 Q4	$185K	Buy	+525	New	+$372K	﹤0.01%	485

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

Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.89% 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

Optiver Holding's MSTX Position: Q2 2026 in Review

Optiver Holding increased its Defiance Daily Target 2x Long MSTR ETF (MSTX) stake by 152% in Q2 2026, buying an estimated $805K and bringing the position to 53,080 shares worth $395K. The position accounts for ﹤0.01% of the portfolio, ranked #787.

Optiver Holding first reported a position in MSTX in Q4 2024 and has held it in 7 quarters since. The position peaked at $2.19M in Q1 2025. 22 funds tracked by Wall St. Rank hold MSTX as of Q2 2026.

Optiver Holding held 53,080 shares of Defiance Daily Target 2x Long MSTR ETF worth $395K as of Q2 2026.
Optiver Holding bought 32,030 Defiance Daily Target 2x Long MSTR ETF shares in Q2 2026, an estimated $805K.
Defiance Daily Target 2x Long MSTR ETF made up ﹤0.01% of Optiver Holding's portfolio in Q2 2026, its #787 holding.
Optiver Holding first reported a position in Defiance Daily Target 2x Long MSTR ETF in Q4 2024 and has held it in 7 quarters since.
Optiver Holding's Defiance Daily Target 2x Long MSTR ETF position peaked at $2.19M in Q1 2025.
22 funds tracked by Wall St. Rank held Defiance Daily Target 2x Long MSTR ETF as of Q2 2026.

Based on Optiver Holding's 13F filing for Q2 2026, filed 12 Aug 2026.