3 institutions reported holding $7.3M of VANGUARD SCOTTSDALE FDS (VSBIX) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($4.1M), SIMPLEX TRADING, LLC ($3.2M), GROUP ONE TRADING LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $4.1M | 49,900 | Added |
| 2 | SIMPLEX TRADING, LLC | $3.2M | 49,300 | Added |
| 3 | GROUP ONE TRADING LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31