James River Group Holdings, Inc.
A specialty property and casualty insurer that covers the risks standard insurance companies refuse to touch — unusual contractor exposures, hard-to-classify small-business liability, and other excess-and-surplus lines. Founded in 2002, its main arm, James River Insurance Company, began writing business in 2003. The group takes its name from Virginia's James River, site of the first permanent English settlement in the Americas.
Estimated from filings — the split-adjusted price range over the quarters each manager built the position. A range, not a fill price; 13F reports a quarter-end snapshot, not a trade date.