OneBeacon Collaterally Estopped from Arbitrating Claims, Reinsurers Assert

BOSTON - National Casualty Insurance Co. and Employers Insurance Company of Wausau have asked a Massachusetts federal judge to rule that certain OneBeacon Insurance Group companies are collaterally estopped from arbitrating the same reinsurance claims that were at issue in a previous arbitration.

In a complaint filed in the U.S. District Court for the District of Massachusetts, National Casualty and Wausau also seek a declaration that OneBeacon’s alleged coercion of an umpire nominee to withdraw constitutes one of its “two strikes” pursuant to the parties’ consolidation agreement.

Between 1966 and 1986, certain insurers within the OneBeacon Insurance Group had …