5 institutions reported holding $69.0M of VANGUARD WORLD FD (VUIAX) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($56.8M), SIMPLEX TRADING, LLC ($11.3M), HRT FINANCIAL LP ($558,000), FIRST MERCHANTS CORP ($294,376), GROUP ONE TRADING LLC ($19,814). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $56.8M | 103,300 | Added |
| 2 | SIMPLEX TRADING, LLC | $11.3M | 20,600 | Trimmed |
| 3 | HRT FINANCIAL LP | $558,000 | 800 | Trimmed |
| 4 | FIRST MERCHANTS CORP | $294,376 | 2,961 | Trimmed |
| 5 | GROUP ONE TRADING LLC | $19,814 | 100 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31