HAMILTON, Bermuda–(BUSINESS WIRE)–Mereo Insurance Limited (“Mereo”) today announced a renewal rights transaction with Everen Specialty Ltd. (“ESL”), a member of the Everen Group, for ESL’s Excess Casualty Energy portfolio. Under the transaction, Mereo will become the insurance carrier on a go-forward basis for both new and renewed business effective June 1, 2026. ESL’s underwriting team and underwriting systems supporting the Excess Casualty Energy portfolio will also transition to Mereo, led