5 institutions reported holding $666,611 of INVESTMENT MANAGERS SER TR I (USAX) in SEC 13F filings for 2026-06-30. Largest institutional holders: CITADEL ADVISORS LLC ($241,750), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($218,059), Optiver Holding B.V. ($180,055), SIMPLEX TRADING, LLC ($26,747), Tower Research Capital LLC (TRC) ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | CITADEL ADVISORS LLC | $241,750 | 12,500 | Added |
| 2 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $218,059 | 11,275 | New |
| 3 | Optiver Holding B.V. | $180,055 | 9,310 | Trimmed |
| 4 | SIMPLEX TRADING, LLC | $26,747 | 1,383 | Added |
| 5 | Tower Research Capital LLC (TRC) | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30