7 institutions reported holding $27,810 of THEMES ETF TR (BULG) in SEC 13F filings for 2026-06-30. Largest institutional holders: Optiver Holding B.V. ($14,327), SIMPLEX TRADING, LLC ($13,483), CITADEL ADVISORS LLC ($0), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($0), TWO SIGMA SECURITIES, LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Optiver Holding B.V. | $14,327 | 442 | Trimmed |
| 2 | SIMPLEX TRADING, LLC | $13,483 | 416 | Added |
| 3 | CITADEL ADVISORS LLC | $0 | 0 | Exited |
| 4 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $0 | 0 | Exited |
| 5 | TWO SIGMA SECURITIES, LLC | $0 | 0 | Exited |
| 6 | XTX Topco Ltd | $0 | 0 | Exited |
| 7 | Belvedere Trading LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30