Who owns MARS?
Roundhill Space & Technology ETF · Roundhill
18 institutions reported holding MARS, worth $18.1M, in Form 13F filings for June 30, 2026.
Top 10 institutional holders of MARS
| Firm | Location | Value | Shares | Change |
|---|---|---|---|---|
| Susquehanna International Group, LLP | Bala Cynwyd, PA | $7.9M | 245,624 | New position |
| Old Mission Capital LLC | Chicago, IL | $3.7M | 113,376 | New position |
| Jane Street Group, LLC | New York, NY | $3.1M | 96,422 | +61,276 shares |
| Citadel Advisors LLC | Miami, FL | $825K | 25,549 | New position |
| Cambridge Investment Research Advisors, Inc. | Fairfield, IA | $794K | 24,560 | New position |
| MGO One Seven LLC | Beachwood, OH | $740K | 22,912 | New position |
| Prelude Capital Management, LLC | New York, NY | $323K | 10,000 | New position |
| Simplex Trading, LLC | Chicago, IL | $276K | 8,538 | New position |
| UBS Group AG | Zurich, Switzerland | $274K | 8,486 | +6,835 shares |
| Group One Trading LLC | Chicago, IL | $97K | 3,010 | 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 MARS?
18 institutional managers reported holding MARS in Form 13F filings for June 30, 2026, worth $18.1M in total. The largest reported position was held by Susquehanna International Group, LLP, at $7.9M.
Did institutions buy or sell MARS last quarter?
Reported 13F value rose 443.9% from March 31, 2026, which includes price moves as well as buying and selling. 16 firms reported a new position and 2 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 MARS 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.