2 institutions reported holding $2.9M of ARCH CAP GROUP LTD (ARH-PC) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($1.8M), SIMPLEX TRADING, LLC ($1.2M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $1.8M | 18,500 | Trimmed |
| 2 | SIMPLEX TRADING, LLC | $1.2M | 12,200 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31