American Home Assurance Company and seven other affiliates of American International Group have filed for a 4.7% overall rate increase for Commercial Fire and Allied Lines business in Massachusetts.

The filing, submitted on February 24, 2026, proposes adopting ISO’s updated prospective loss cost revisions, with an effective date of July 1, 2026, for both new and renewal policies. The change is expected to impact 19 policyholders and increase total written premium by approximately $72,211.

The prior rate revision for the program was a 1.7% decrease that took effect on May 1, 2025. The filing notes that the updated loss cost multipliers do not apply to Glatfelter programs.