Jane Street
IONZ

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

Jane Street’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 		$210K Buy
+81,803
New +$554K ﹤0.01% 10031
2026
Q1 		– Sell
-16,794
Closed -$381K – 13505
2025
Q4 		$381K Sell
16,794
-109,256
-87% -$2.55M ﹤0.01% 8305
2025
Q3 		$3.87M Buy
+126,050
New +$10.1M ﹤0.01% 3806

Other funds holding IONZ

SG
StoneX Group New York $2.48B AUM 33.54% 1-Year Est. Return
JF
Jump Financial Chicago, Illinois $12.4B AUM 62.79% 1-Year Est. Return
Optiver Holding
Optiver Holding Amsterdam, Netherlands $371B AUM 64.6% 1-Year Est. Return
FTUS
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
HF
HRT Financial New York $54.8B AUM 81.03% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.91% 1-Year Est. Return
GS
GTS Securities Miami, Florida $4.75B AUM 41.97% 1-Year Est. Return
TSS
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

Jane Street's IONZ Position: Q2 2026 in Review

Jane Street opened a new position in Defiance Daily Target 2x Short IONQ ETF (IONZ) in Q2 2026: 81,803 shares worth $210K. The stake represents ﹤0.01% of the portfolio and ranks #10031 among its holdings. This is a return to the name: Jane Street previously reported a position in IONZ as recently as Q4 2025.

Jane Street first reported a position in IONZ in Q3 2025 and has held it in 3 quarters since. The position peaked at $3.87M in Q3 2025. 18 funds tracked by Wall St. Rank hold IONZ as of Q2 2026.

  • Jane Street held 81,803 shares of Defiance Daily Target 2x Short IONQ ETF worth $210K as of Q2 2026.
  • Defiance Daily Target 2x Short IONQ ETF was a new Jane Street position in Q2 2026.
  • Defiance Daily Target 2x Short IONQ ETF made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #10031 holding.
  • Jane Street first reported a position in Defiance Daily Target 2x Short IONQ ETF in Q3 2025 and has held it in 3 quarters since.
  • Jane Street's Defiance Daily Target 2x Short IONQ ETF position peaked at $3.87M in Q3 2025.
  • 18 funds tracked by Wall St. Rank held Defiance Daily Target 2x Short IONQ ETF as of Q2 2026.

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