15 institutions reported holding $3.8M of THEMES ETF TR (ADBG) in SEC 13F filings for 2026-03-31. Largest institutional holders: Virtu Financial LLC ($1.5M), Optiver Holding B.V. ($574,998), JANE STREET GROUP, LLC ($429,583), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($426,370), GTS SECURITIES LLC ($305,694). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Virtu Financial LLC | $1.5M | 322,561 | New |
| 2 | Optiver Holding B.V. | $574,998 | 125,272 | Added |
| 3 | JANE STREET GROUP, LLC | $429,583 | 93,591 | Added |
| 4 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $426,370 | 92,891 | Trimmed |
| 5 | GTS SECURITIES LLC | $305,694 | 66,600 | New |
| 6 | DRW Securities, LLC | $209,487 | 45,640 | New |
| 7 | Garden State Investment Advisory Services LLC | $112,707 | 24,555 | New |
| 8 | CITADEL ADVISORS LLC | $106,488 | 23,200 | Trimmed |
| 9 | HRT FINANCIAL LP | $98,000 | 21,421 | New |
| 10 | GROUP ONE TRADING LLC | $63,218 | 13,773 | Added |
| 11 | TOTH FINANCIAL ADVISORY CORP | $13,197 | 2,875 | New |
| 12 | Caitlin John, LLC | $1,607 | 350 | New |
| 13 | SIMPLEX TRADING, LLC | $541 | 118 | Trimmed |
| 14 | UBS Group AG | $0 | 0 | Exited |
| 15 | Belvedere Trading LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31