6 institutions reported holding $1.7M of THEMES ETF TR (NETG) in SEC 13F filings for 2026-06-30. Largest institutional holders: Optiver Holding B.V. ($611,663), Virtu Financial LLC ($540,000), CITADEL ADVISORS LLC ($358,103), OLD MISSION CAPITAL LLC ($164,158), SIMPLEX TRADING, LLC ($4,078). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Optiver Holding B.V. | $611,663 | 45,443 | Added |
| 2 | Virtu Financial LLC | $540,000 | 40,145 | Trimmed |
| 3 | CITADEL ADVISORS LLC | $358,103 | 26,605 | New |
| 4 | OLD MISSION CAPITAL LLC | $164,158 | 12,196 | New |
| 5 | SIMPLEX TRADING, LLC | $4,078 | 303 | New |
| 6 | UBS Group AG | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30