Who owns MST?
Defiance Leveraged Long + Income MSTR ETF · Defiance
6 institutions reported holding MST, worth $1.1M, in Form 13F filings for June 30, 2026.
Top 6 institutional holders of MST
| Firm | Location | Value | Shares | Change |
|---|---|---|---|---|
| Old Mission Capital LLC | Chicago, IL | $581K | 80,637 | New position |
| Susquehanna International Group, LLP | Bala Cynwyd, PA | $282K | 39,183 | New position |
| Jane Street Group, LLC | New York, NY | $233K | 32,315 | New position |
| Simplex Trading, LLC | Chicago, IL | $6K | 837 | −901 shares |
| Group One Trading LLC | Chicago, IL | $5K | 760 | +384 shares |
| Keating Financial Advisory Services, Inc. | Manhattan, KS | $1K | 194 | New position |
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 MST?
6 institutional managers reported holding MST in Form 13F filings for June 30, 2026, worth $1.1M in total. The largest reported position was held by Old Mission Capital LLC, at $581K.
Did institutions buy or sell MST last quarter?
Reported 13F value rose 2450.7% from March 31, 2026, which includes price moves as well as buying and selling. 4 firms reported a new position and 0 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 MST 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.