9 institutions reported holding $943,050 of INVESTMENT MANAGERS SER TR I (TARK) in SEC 13F filings for 2026-03-31. Largest institutional holders: Optiver Holding B.V. ($841,972), SIMPLEX TRADING, LLC ($101,078), Sloy Dahl & Holst, LLC ($0), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($0), CITADEL ADVISORS LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Optiver Holding B.V. | $841,972 | 23,890 | Added |
| 2 | SIMPLEX TRADING, LLC | $101,078 | 2,868 | New |
| 3 | Sloy Dahl & Holst, LLC | $0 | 0 | Exited |
| 4 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $0 | 0 | Exited |
| 5 | CITADEL ADVISORS LLC | $0 | 0 | Exited |
| 6 | GTS SECURITIES LLC | $0 | 0 | Exited |
| 7 | JANE STREET GROUP, LLC | $0 | 0 | Exited |
| 8 | Belvedere Trading LLC | $0 | 0 | Exited |
| 9 | Client First Investment Management LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31