17 institutions reported holding $2.7M of THEMES ETF TR (TSLG) in SEC 13F filings for 2026-03-31. Largest institutional holders: HRT FINANCIAL LP ($1.4M), TWO SIGMA SECURITIES, LLC ($302,038), Blueprint Financial Advisors LLC ($203,320), Blueprint Investment Partners LLC ($203,320), Optiver Holding B.V. ($185,511). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | HRT FINANCIAL LP | $1.4M | 241,047 | New |
| 2 | TWO SIGMA SECURITIES, LLC | $302,038 | 50,508 | New |
| 3 | Blueprint Financial Advisors LLC | $203,320 | 34,000 | Added |
| 4 | Blueprint Investment Partners LLC | $203,320 | 34,000 | Added |
| 5 | Optiver Holding B.V. | $185,511 | 31,022 | Added |
| 6 | XTX Topco Ltd | $183,191 | 30,634 | New |
| 7 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $164,199 | 27,458 | Trimmed |
| 8 | Larson Financial Group LLC | $23,669 | 3,958 | New |
| 9 | SIMPLEX TRADING, LLC | $7,152 | 1,196 | Added |
| 10 | SBI Securities Co., Ltd. | $3,474 | 581 | Added |
| 11 | Tower Research Capital LLC (TRC) | $1,740 | 291 | Added |
| 12 | UBS Group AG | $0 | 0 | Exited |
| 13 | Benson Wealth Management INC | $0 | 0 | Exited |
| 14 | OLD MISSION CAPITAL LLC | $0 | 0 | Exited |
| 15 | Belvedere Trading LLC | $0 | 0 | Exited |
| 16 | CITADEL ADVISORS LLC | $0 | 0 | Exited |
| 17 | JANE STREET GROUP, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31