3 institutions reported holding $9.0M of VANGUARD SCOTTSDALE FDS (VSTBX) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($5.4M), SIMPLEX TRADING, LLC ($3.5M), GROUP ONE TRADING LLC ($62,910). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $5.4M | 54,300 | Added |
| 2 | SIMPLEX TRADING, LLC | $3.5M | 51,900 | Added |
| 3 | GROUP ONE TRADING LLC | $62,910 | 900 | New |
来源：SEC 13F 申报文件 · 截至 2026-06-30