8 institutions reported holding $9.0M of ISHARES TR (STLVZZZ) in SEC 13F filings for 2026-03-31. Largest institutional holders: SIMPLEX TRADING, LLC ($8.0M), IMC-Chicago, LLC ($342,244), GROUP ONE TRADING LLC ($330,002), Hoxton Planning & Management, LLC ($219,415), Legacy Private Trust Co. ($50,882). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $8.0M | 84,700 | Added |
| 2 | IMC-Chicago, LLC | $342,244 | 3,400 | New |
| 3 | GROUP ONE TRADING LLC | $330,002 | 8,000 | Added |
| 4 | Hoxton Planning & Management, LLC | $219,415 | 6,893 | New |
| 5 | Legacy Private Trust Co. | $50,882 | 2,219 | New |
| 6 | Hurley Capital, LLC | $30,001 | 1,290 | New |
| 7 | CURIO WEALTH, LLC | $244 | 5 | New |
| 8 | ES4, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31