4 institutions reported holding $6.4M of VANGUARD ADMIRAL FDS INC (VUSXX) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($5.0M), SIMPLEX TRADING, LLC ($1.3M), Grey Fox Wealth Advisors, LLC ($32,905), HCR Wealth Advisors ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $5.0M | 12,300 | Trimmed |
| 2 | SIMPLEX TRADING, LLC | $1.3M | 4,000 | Trimmed |
| 3 | Grey Fox Wealth Advisors, LLC | $32,905 | 32,905 | Added |
| 4 | HCR Wealth Advisors | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31