Who owns RBLU?
T-Rex 2X Long RBLX Daily Target ETF · T-REX
7 institutions reported holding RBLU, worth $1.6M, in Form 13F filings for June 30, 2026.
Top 7 institutional holders of RBLU
| Firm | Location | Value | Shares | Change |
|---|---|---|---|---|
| Optiver Holding B.V. | Amsterdam, Netherlands | $648K | 72,595 | +51,025 shares |
| Susquehanna International Group, LLP | Bala Cynwyd, PA | $476K | 53,395 | New position |
| Citadel Advisors LLC | Miami, FL | $451K | 50,551 | +39,016 shares |
| SBI Securities Co., Ltd. | Tokyo, Japan | $3K | 294 | +154 shares |
| Simplex Trading, LLC | Chicago, IL | $1K | 168 | +81 shares |
| Tower Research Capital LLC (TRC) | New York, NY | $312 | 35 | +6 shares |
| Citigroup Inc. | New York, NY | $18 | 2 | 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 RBLU?
7 institutional managers reported holding RBLU in Form 13F filings for June 30, 2026, worth $1.6M in total. The largest reported position was held by Optiver Holding B.V., at $648K.
Did institutions buy or sell RBLU last quarter?
Reported 13F value rose 300.1% from March 31, 2026, which includes price moves as well as buying and selling. 2 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 RBLU 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.