Citadel Advisors’s T-Rex 2X Inverse MSTR Daily Target ETF MSTZ Stock Holding History

Citadel Advisors’s Portfolio MSTZ Stock Details MSTZ Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-13,364	Closed	-$179K	–	14541
2025 Q4	$229K	Sell	13,364 -285,372	-96%	-$2.9M	﹤0.01%	10737
2025 Q3	$1.57M	Buy	298,736 +111,214	+59%	+$499K	﹤0.01%	6568
2025 Q2	$784K	Sell	187,522 -124,972	-40%	-$784K	﹤0.01%	7610
2025 Q1	$4.38M	Buy	+312,494	New	+$5.48M	﹤0.01%	4098

Other funds holding MSTZ

HRT Financial New York $54.8B AUM 81.03% 1-Year Est. Return

StoneX Group New York $2.75B AUM 24.25% 1-Year Est. Return

Susquehanna International Group Bala Cynwyd, Pennsylvania $1.28T AUM 58.89% 1-Year Est. Return

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

IMC Chicago Chicago, Illinois $483B AUM 41.26% 1-Year Est. Return

Group One Trading Chicago, Illinois $71.1B AUM 128.96% 1-Year Est. Return

XTX Topco George Town, Cayman Islands $7.72B AUM 32.88% 1-Year Est. Return

Two Sigma Securities New York $1.16B AUM 36.23% 1-Year Est. Return

Optiver Holding Amsterdam, Netherlands $371B AUM 64.6% 1-Year Est. Return

GTS Securities Miami, Florida $4.75B AUM 41.97% 1-Year Est. Return

Citadel Advisors's MSTZ Position: Q1 2026 in Review

Citadel Advisors sold out of T-Rex 2X Inverse MSTR Daily Target ETF (MSTZ) in Q1 2026, closing a stake of 13,364 shares — an estimated $179K sold.

Citadel Advisors first reported a position in MSTZ in Q1 2025 and held it in 4 quarters. The position peaked at $4.38M in Q1 2025. 16 funds tracked by Wall St. Rank hold MSTZ as of Q1 2026.

Citadel Advisors reported no remaining T-Rex 2X Inverse MSTR Daily Target ETF position as of Q1 2026 after selling out during the quarter.
Citadel Advisors sold 13,364 T-Rex 2X Inverse MSTR Daily Target ETF shares in Q1 2026, an estimated $179K.
Citadel Advisors first reported a position in T-Rex 2X Inverse MSTR Daily Target ETF in Q1 2025 and held it in 4 quarters.
Citadel Advisors's T-Rex 2X Inverse MSTR Daily Target ETF position peaked at $4.38M in Q1 2025.
16 funds tracked by Wall St. Rank held T-Rex 2X Inverse MSTR Daily Target ETF as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.