8 institutions reported holding $24.2M of ISHARES TR (INDF1) in SEC 13F filings for 2026-03-31. Largest institutional holders: Optiver Holding B.V. ($17.6M), SIMPLEX TRADING, LLC ($4.4M), IMC-Chicago, LLC ($815,524), GROUP ONE TRADING LLC ($710,263), Burns Matteson Capital Management, LLC ($681,400). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Optiver Holding B.V. | $17.6M | 386,000 | Added |
| 2 | SIMPLEX TRADING, LLC | $4.4M | 100,700 | Trimmed |
| 3 | IMC-Chicago, LLC | $815,524 | 17,900 | Added |
| 4 | GROUP ONE TRADING LLC | $710,263 | 16,700 | Added |
| 5 | Burns Matteson Capital Management, LLC | $681,400 | 10,000 | New |
| 6 | Phillip James Consulting Co. | $8,000 | 233 | New |
| 7 | Hurley Capital, LLC | $5,020 | 22 | New |
| 8 | SUMMIT SECURITIES GROUP LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31