On April 10, 2025, Allmerica Financial Alliance Insurance Company, a member of The Hanover Insurance Group, filed a rule guide update for its Hanover Collector Car Program in Wisconsin. Marketed as “Hanover Collector Car, powered by Hagerty,” the program introduces new rating and underwriting factors tied to mileage, storage, vehicle attributes, and driving records.

Notable changes include a Book Transfer Rate Stabilization factor to ease transitions from other insurers, rate capping at renewal to manage disruption, and expanded endorsement options like “Motorsports Advantage,” “Cherished Salvage,” and “Vehicle Under Construction.” The program also assigns risk symbols by make and body type and includes adjustments based on youthful operators, unverifiable records, and undisclosed drivers.

This filing aligns with Hanover’s strategy to grow its presence in the specialty auto segment through its Hagerty partnership.