9 institutions reported holding $2.0M of THEMES ETF TR (ASMG) in SEC 13F filings for 2026-03-31. Largest institutional holders: CITADEL ADVISORS LLC ($1.5M), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($340,617), MORGAN STANLEY ($92,406), SIMPLEX TRADING, LLC ($54,619), GROUP ONE TRADING LLC ($5,864). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | CITADEL ADVISORS LLC | $1.5M | 46,880 | Added |
| 2 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $340,617 | 10,745 | Trimmed |
| 3 | MORGAN STANLEY | $92,406 | 2,915 | New |
| 4 | SIMPLEX TRADING, LLC | $54,619 | 1,723 | Trimmed |
| 5 | GROUP ONE TRADING LLC | $5,864 | 185 | New |
| 6 | SBI Securities Co., Ltd. | $285 | 9 | New |
| 7 | UBS Group AG | $95 | 3 | Trimmed |
| 8 | Belvedere Trading LLC | $0 | 0 | Exited |
| 9 | Optiver Holding B.V. | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31