Fourth Circuit Enforces Broad “Related” Claim Provision in Dispute Between Insurers

Short summary

The Fourth Circuit held that two separate lawsuits against a lab testing company constituted a single related claim under insurance policy, shifting full coverage responsibility to the earlier insurer. The ruling turned on policy language requiring only logical or causal connection by any common fact. This demonstrates how expansively written related-claims provisions can dramatically shift risk allocation between insurers and policy periods.

• •Fourth Circuit reversed district court, holding two separate lawsuits constitute one related claim
• •Ruling shifts coverage obligation from Navigators back to Columbia based on shared factual connection
• •Shows how broad policy language on related claims can materially affect insurer risk allocation

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