5 institutions reported holding $111.7M of VANGUARD WORLD FD (VUIAX) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($93.8M), SIMPLEX TRADING, LLC ($16.6M), GROUP ONE TRADING LLC ($1.1M), FIRST MERCHANTS CORP ($265,123), HRT FINANCIAL LP ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $93.8M | 768,700 | Added |
| 2 | SIMPLEX TRADING, LLC | $16.6M | 132,700 | Added |
| 3 | GROUP ONE TRADING LLC | $1.1M | 8,800 | Added |
| 4 | FIRST MERCHANTS CORP | $265,123 | 2,697 | Trimmed |
| 5 | HRT FINANCIAL LP | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30