Optiver Holding
IONZ icon

Optiver Holding’s Defiance Daily Target 2x Short IONQ ETF IONZ Stock Holding History

Optiver Holding’s Portfolio IONZ Stock Details IONZ Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$1.13M Buy
44,108
+43,240
+4,982% +$2.93M ﹤0.01% 633
2026
Q1 		$216K Sell
868
-1,256
-59% -$273K ﹤0.01% 787
2025
Q4 		$482K Sell
2,124
-112
-5% -$26.1K ﹤0.01% 585
2025
Q3 		$687K Buy
+2,236
New +$1.79M ﹤0.01% 495

Other funds holding IONZ

StoneX Group
StoneX Group New York $2.48B AUM 33.54% 1-Year Est. Return
Jump Financial
Jump Financial Chicago, Illinois $12.4B AUM 62.79% 1-Year Est. Return
Flow Traders U.S.
Flow Traders U.S. New York $2.43B AUM 44.44% 1-Year Est. Return
IMC Chicago
IMC Chicago Chicago, Illinois $419B AUM 72.04% 1-Year Est. Return
HRT Financial
HRT Financial New York $54.8B AUM 81.03% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return
Jane Street
Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return
GTS Securities
GTS Securities Miami, Florida $4.75B AUM 41.97% 1-Year Est. Return
Two Sigma Securities
Two Sigma Securities New York $1.16B AUM 36.23% 1-Year Est. Return
SRL
Scientech Research LLC Jersey City, New Jersey $123M AUM 198.31% 1-Year Est. Return

Optiver Holding's IONZ Position: Q2 2026 in Review

Optiver Holding increased its Defiance Daily Target 2x Short IONQ ETF (IONZ) stake by 4,982% in Q2 2026, buying an estimated $2.93M and bringing the position to 44,108 shares worth $1.13M. The position accounts for ﹤0.01% of the portfolio, ranked #633.

Optiver Holding first reported a position in IONZ in Q3 2025 and has held it in 4 quarters since. 18 funds tracked by Wall St. Rank hold IONZ as of Q2 2026.

  • Optiver Holding held 44,108 shares of Defiance Daily Target 2x Short IONQ ETF worth $1.13M as of Q2 2026.
  • Optiver Holding bought 43,240 Defiance Daily Target 2x Short IONQ ETF shares in Q2 2026, an estimated $2.93M.
  • Defiance Daily Target 2x Short IONQ ETF made up ﹤0.01% of Optiver Holding's portfolio in Q2 2026, its #633 holding.
  • Optiver Holding first reported a position in Defiance Daily Target 2x Short IONQ ETF in Q3 2025 and has held it in 4 quarters since.
  • 18 funds tracked by Wall St. Rank held Defiance Daily Target 2x Short IONQ ETF as of Q2 2026.

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