Arch Insurance Company has filed updates to its Businessowners (BOP) program in Arizona, including five new proprietary endorsements and revised rating rules. Changes include a crisis management extension, multicover options, and specialized endorsements for real estate owners. Rule modifications address private fire protection discounts and blanket green upgrade coverage. The filing, submitted July 23, 2025, involves no rate impact and applies to a program with less than $90K in written premium nationwide. ISO remains the foundation for forms and rates.