Lyndon Southern introduced updates to its commercial umbrella and excess liability program in Nevada, combining a new mining-related exclusion with a 20% rate increase.

The filing, submitted April 26, 2026, adds a Mining Limitation Endorsement that removes coverage for a range of mining-related risks. This includes damage to underground resources, land movement tied to mining activity, and costs tied to restoration or reclamation. The endorsement also expands pollution-related exclusions and applies only to policies with mining classifications.

Alongside the form change, the insurer is increasing rates by 20%, impacting 104 policyholders and about $112,752 in written premium. The change reflects higher loss severity, with more claims reaching excess layers, signaling that existing pricing no longer aligns with the underlying risk.

The update also revises increase limit factors across the program to better reflect loss trends in higher layers, where experience has diverged from primary coverage. The company notes that these factors had remained unchanged for several years.