5 institutions reported holding $248,740 of INVESTMENT MANAGERS SER TR I (OPEX) in SEC 13F filings for 2026-06-30. Largest institutional holders: SUSQUEHANNA INTERNATIONAL GROUP, LLP ($224,179), GROUP ONE TRADING LLC ($19,437), SIMPLEX TRADING, LLC ($5,124), CITADEL ADVISORS LLC ($0), UBS Group AG ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $224,179 | 12,687 | New |
| 2 | GROUP ONE TRADING LLC | $19,437 | 1,100 | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $5,124 | 290 | New |
| 4 | CITADEL ADVISORS LLC | $0 | 0 | Exited |
| 5 | UBS Group AG | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30