Jane Street
BTCZ

Jane Street’s T-Rex 2X Inverse Bitcoin Daily Target ETF BTCZ Stock Holding History

Jane Street’s Portfolio BTCZ Stock Details BTCZ Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$1.28M Buy
234,343
+196,408
+518% +$983K ﹤0.01% 5967
2025
Q4 		$160K Buy
+37,935
New +$135K ﹤0.01% 9887
2025
Q1 		– Sell
-56,419
Closed -$335K – 10926
2024
Q4 		$335K Buy
56,419
+44,815
+386% +$438K ﹤0.01% 7558
2024
Q3 		$190K Buy
+11,604
New +$227K ﹤0.01% 8678

Other funds holding BTCZ

HF
HRT Financial New York $40.1B AUM 58.22% 1-Year Est. Return
TSS
Two Sigma Securities New York $861M AUM 21.33% 1-Year Est. Return
Group One Trading
Group One Trading Chicago, Illinois $52.2B AUM 104.56% 1-Year Est. Return
FTUS
Flow Traders U.S. New York $3.16B AUM 19.52% 1-Year Est. Return
SRL
Scientech Research LLC Jersey City, New Jersey $120M AUM 73.62% 1-Year Est. Return
Simplex Trading
Simplex Trading Chicago, Illinois $149B AUM 62.07% 1-Year Est. Return

Jane Street's BTCZ Position: Q1 2026 in Review

Jane Street increased its T-Rex 2X Inverse Bitcoin Daily Target ETF (BTCZ) stake by 518% in Q1 2026, buying an estimated $983K and bringing the position to 234,343 shares worth $1.28M. The position accounts for ﹤0.01% of the portfolio, ranked #5967.

Jane Street first reported a position in BTCZ in Q3 2024 and has held it in 4 quarters since. 7 funds tracked by Wall St. Rank hold BTCZ as of Q1 2026.

  • Jane Street held 234,343 shares of T-Rex 2X Inverse Bitcoin Daily Target ETF worth $1.28M as of Q1 2026.
  • Jane Street bought 196,408 T-Rex 2X Inverse Bitcoin Daily Target ETF shares in Q1 2026, an estimated $983K.
  • T-Rex 2X Inverse Bitcoin Daily Target ETF made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #5967 holding.
  • Jane Street first reported a position in T-Rex 2X Inverse Bitcoin Daily Target ETF in Q3 2024 and has held it in 4 quarters since.
  • 7 funds tracked by Wall St. Rank held T-Rex 2X Inverse Bitcoin Daily Target ETF as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.