A Chubb Ltd. unit and two pharmaceutical companies reached a confidential settlement to resolve allegations that the insurer improperly delayed and refused to cover product liability claims over a drug used to treat gout and kidney stones.

Certain issues involving a non-party have to be resolved before Rising Pharma Holdings Inc., Casper Pharma LLC, and Westchester Surplus Lines Insurance Co. can dismiss the case, according to a Monday letter to the US District Court for the District of Delaware.

The pharmaceutical companies sued Westchester in February 2025 in the Delaware Superior Court before the insurer removed the case to this …