Arch Capital and Kelso-backed Premia, a reinsurance group, agreed to acquire Navigators, which is holding or owning securities of companies other than banks, from The Hartford Financial Services Group, a property and casualty company in the United States. The transaction is subject to typical regulatory approvals. Financial terms were not disclosed. “We are delighted that we have developed a positive solution with The Hartford for ASCO, and we look forward to welcoming ASCO and its staff into the Premia family,” Bill O’Farrell, Premia Chief Executive Officer.