9 institutions reported holding $3.2M of THEMES ETF TR (IREG) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($1.4M), CITADEL ADVISORS LLC ($515,480), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($436,580), JANE STREET GROUP, LLC ($291,930), Vontobel Holding Ltd. ($197,250). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $1.4M | 66,900 | New |
| 2 | CITADEL ADVISORS LLC | $515,480 | 39,200 | Added |
| 3 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $436,580 | 33,200 | New |
| 4 | JANE STREET GROUP, LLC | $291,930 | 22,200 | New |
| 5 | Vontobel Holding Ltd. | $197,250 | 15,000 | New |
| 6 | SIMPLEX TRADING, LLC | $183,497 | 12,500 | Added |
| 7 | GROUP ONE TRADING LLC | $140,307 | 12,000 | Added |
| 8 | SBI Securities Co., Ltd. | $17,476 | 1,329 | New |
| 9 | Optiver Holding B.V. | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30