11 institutions reported holding $1.4M of THEMES ETF TR (ONDG) in SEC 13F filings for 2026-06-30. Largest institutional holders: StoneX Group Inc. ($426,068), CITADEL ADVISORS LLC ($389,610), JANE STREET GROUP, LLC ($319,513), IMC-Chicago, LLC ($150,233), Belvedere Trading LLC ($49,817). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | StoneX Group Inc. | $426,068 | 66,783 | Added |
| 2 | CITADEL ADVISORS LLC | $389,610 | 117,000 | New |
| 3 | JANE STREET GROUP, LLC | $319,513 | 95,950 | Added |
| 4 | IMC-Chicago, LLC | $150,233 | 45,115 | Added |
| 5 | Belvedere Trading LLC | $49,817 | 14,960 | New |
| 6 | GTS SECURITIES LLC | $33,327 | 10,008 | New |
| 7 | SBI Securities Co., Ltd. | $10,486 | 3,149 | New |
| 8 | SIMPLEX TRADING, LLC | $4,282 | 1,286 | New |
| 9 | Optiver Holding B.V. | $3,686 | 1,107 | Trimmed |
| 10 | GROUP ONE TRADING LLC | $666 | 200 | New |
| 11 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30