Optiver Holding’s Tradr 2X Long IREN Daily ETF IREX Stock Holding History

Optiver Holding’s Portfolio IREX Stock Details IREX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-6,419	Closed	-$195K	–	2848
2025 Q4	$195K	Buy	+6,419	New	+$403K	﹤0.01%	720

Other funds holding IREX

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

SRL

Scientech Research LLC Jersey City, New Jersey $120M AUM 73.62% 1-Year Est. Return

Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return

Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Belvedere Trading Chicago, Illinois $87.6B AUM 131.08% 1-Year Est. Return

TRCT

Tower Research Capital (TRC) New York $3.85B AUM 32.11% 1-Year Est. Return

Optiver Holding's IREX Position: Q1 2026 in Review

Optiver Holding sold out of Tradr 2X Long IREN Daily ETF (IREX) in Q1 2026, closing a stake of 6,419 shares — an estimated $195K sold.

Optiver Holding first reported a position in IREX in Q4 2025 and held it in 1 quarter. The position peaked at $195K in Q4 2025. 7 funds tracked by Wall St. Rank hold IREX as of Q1 2026.

Optiver Holding reported no remaining Tradr 2X Long IREN Daily ETF position as of Q1 2026 after selling out during the quarter.
Optiver Holding sold 6,419 Tradr 2X Long IREN Daily ETF shares in Q1 2026, an estimated $195K.
Optiver Holding first reported a position in Tradr 2X Long IREN Daily ETF in Q4 2025 and held it in 1 quarter.
Optiver Holding's Tradr 2X Long IREN Daily ETF position peaked at $195K in Q4 2025.
7 funds tracked by Wall St. Rank held Tradr 2X Long IREN Daily ETF as of Q1 2026.

Based on Optiver Holding's 13F filing for Q1 2026, filed 15 May 2026.