Who owns MSTZ?
T-Rex 2X Inverse MSTR Daily Target ETF · T-REX
16 institutions reported holding MSTZ, worth $11.0M, in Form 13F filings for June 30, 2026.
Top 10 institutional holders of MSTZ
| Firm | Location | Value | Shares | Change |
|---|---|---|---|---|
| HRT Financial LP | New York, NY | $3.0M | 190,006 | New position |
| StoneX Group Inc. | New York, NY | $1.8M | 169,824 | +111,633 shares |
| Susquehanna International Group, LLP | Bala Cynwyd, PA | $1.2M | 78,755 | −58,331 shares |
| Jane Street Group, LLC | New York, NY | $1.2M | 76,335 | +56,802 shares |
| IMC-Chicago, LLC | Chicago, IL | $890K | 57,317 | +31,691 shares |
| Group One Trading LLC | Chicago, IL | $814K | 52,426 | New position |
| XTX Topco Ltd | London, United Kingdom | $555K | 35,715 | −81,604 shares |
| Two Sigma Securities, LLC | New York, NY | $538K | 34,637 | −7,882 shares |
| Optiver Holding B.V. | Amsterdam, Netherlands | $401K | 25,819 | +9,063 shares |
| GTS Securities LLC | New York, NY | $176K | 11,349 | −20,988 shares |
From SEC Form 13F, for managers with $100M+ in US securities. Change compares June 30, 2026 with March 31, 2026. “New position” means no holding in the prior filing we have.
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Frequently asked questions
Who owns MSTZ?
16 institutional managers reported holding MSTZ in Form 13F filings for June 30, 2026, worth $11.0M in total. The largest reported position was held by HRT Financial LP, at $3.0M.
Did institutions buy or sell MSTZ last quarter?
Reported 13F value rose 42.9% from March 31, 2026, which includes price moves as well as buying and selling. 6 firms reported a new position and 6 sold all of theirs.
What is a Form 13F?
A quarterly report filed with the SEC by institutional investment managers with $100 million or more in qualifying US securities. It lists their long positions at quarter end. It doesn't cover retail investors, cash, short positions, or managers under the threshold, so it shows part of a fund's ownership, not all of it.
How often is MSTZ ownership data updated?
13F filings are due 45 days after each quarter ends. The next set is due around mid-November. Positions can be up to about four and a half months old by the time a new set arrives.