2 institutions reported holding $6.7M of ARCH CAP GROUP LTD (ARH-PC) in SEC 13F filings for 2026-06-30. Largest institutional holders: SIMPLEX TRADING, LLC ($4.0M), IMC-Chicago, LLC ($2.6M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $4.0M | 41,400 | Added |
| 2 | IMC-Chicago, LLC | $2.6M | 27,300 | Added |
Source: SEC Form 13F filings · as of 2026-06-30