Grinnell Mutual Reinsurance Company
Carrier website links, underwriting access points, mapped product lines, and appetite notes in one place.
This appetite summary is only a guide. Confirm eligibility, submission requirements, restrictions, and binding authority directly with the carrier or underwriter before relying on it.
Carrier appetite summary
Overall - Regional property-casualty mutual and reinsurer focused on small to mid-sized Main Street, farm, and community business in its traditional Midwest footprint. Appetite and detailed rules are maintained in state-specific online agent manuals; agents are directed to those manuals for binding authority, eligibility, and class-by-class rules.([dev.wcm.grinnellmutual.com](https://dev.wcm.grinnellmutual.com/underwriting/agent-manuals/in-manual-page?utm_source=openai)) Geography - Operates primarily through affiliated local mutuals and independent agents in Midwestern and selected surrounding states; eligibility, forms, and rates vary by state and are controlled via the state agent manuals.([dev.wcm.grinnellmutual.com](https://dev.wcm.grinnellmutual.com/underwriting/agent-manuals/in-manual-page?utm_source=openai)) Workers Compensation - Offered as part of business insurance portfolio; targeted to small and mid-sized employers with standard industrial exposures. Not designed for high-hazard or heavy industrial risks.([grinnellmutual.com](https://www.grinnellmutual.com/insurance/business?utm_source=openai)) - Underwriting emphasizes employee safety programs and loss-control engagement; accounts with poor loss history or inadequate safety are typically referred for underwriter review via the manuals. - Standalone workers compensation for very small or unusual risks may be limited or unavailable; many placements rely on alignment with broader commercial package/auto relationships and state WC markets. Commercial Property (including BOP/package) - Targets local Main Street businesses, light mercantile, service, and low-to-moderate hazard habitational and commercial property accounts. Higher-hazard manufacturing, frame habitational with poor protection, and risks with significant CAT or shock-loss potential are generally restricted or require referral, as directed in the manuals.([grinnellmutual.com](https://www.grinnellmutual.com/insurance/business?utm_source=openai)) - Property limits and Total Insured Values (TIV) above normal agency binding authority are subject to prior company approval and often loss-control inspection; larger single-location TIVs are flagged for Grinnell review and potential facultative reinsurance.([amutualinsurance.com](https://amutualinsurance.com/wp-content/uploads/2024/10/Guidelines-Updated-01-01-2025-Final.pdf?utm_source=openai)) - Agents must follow binding authority thresholds in the manuals; risks above stated limits, with unusual protection/occupancy, or with significant prior losses require submission to underwriting before binding. Commercial Umbrella - Available to insureds that carry all underlying required commercial liability policies with Grinnell Mutual; standalone umbrellas over external primary carriers are generally not targeted.([grinnellmutual.com](https://www.grinnellmutual.com/insurance/business/coverage?utm_source=openai)) - Underlying policies must meet minimum limit requirements (per state manuals) and be in good standing with acceptable loss experience; higher-limit umbrellas and special hazards (e.g., large fleets, higher-hazard contracting, or premises with significant public exposure) require individual underwriter review. Home (Homeowners / Home-Guard program) - Focus on owner-occupied dwellings in good condition with standard personal-lines exposures written via local mutual partners and agents. - Home-Guard guidelines impose additional underwriting restrictions on new business for certain forms and tiers; risks with prior loss issues, non-owner occupancy, or adverse conditions may be restricted or declined.([heartlandmutualins.net](https://heartlandmutualins.net/news-events/?utm_source=openai)) - Larger or higher-value dwellings, or those with unusual construction, protection or loss history, may require company review and are sometimes handled with special endorsements or ACV limitations per the manuals. Other Notable Lines - Business coverages also include commercial auto, cyber, EPLI, and bonds; eligibility and preferred classes are governed by line-specific sections of the commercial manuals.([grinnellmutual.com](https://www.grinnellmutual.com/insurance/business/coverage?utm_source=openai)) - Personal auto, including multi-line discounts with home or farm, is available in many territories; risk acceptability and tiering are driven by insurance score, prior limits, lapse history, and driving record per separate agent manuals and quick reference guides.([dev.wcm.grinnellmutual.com](https://dev.wcm.grinnellmutual.com/globalassets/marketing-materials/agent-training/6714-pa-mv-personal-auto-program-quick-reference-guide.pdf?utm_source=openai)) - Special or non-standard risks outside direct-line appetite may be placed through Grinnell Specialty Agency, which works on a brokerage basis for Grinnell-appointed agents. Agents are instructed to contact their assigned specialty broker or the specialty desk email/phone for placement.([dev.wcm.grinnellmutual.com](https://dev.wcm.grinnellmutual.com/microsite/grinnell-specialty-agency/?utm_source=openai)) Preferred Business (operational signals) - Small to mid-sized community businesses with stable operations, favorable loss experience, and good maintenance. - Owner-occupied homes and personal lines accounts that can be written on a package/multi-line basis (home, farm, personal auto) with the mutual and Grinnell. - Commercial accounts where core coverages (property, GL, auto, WC) are consolidated with Grinnell, enabling umbrella attachment and loss-control engagement. Restricted / Declined Business (operational signals) - Large single-location commercial property with very high TIV beyond normal binding authority; requires referral and potentially facultative support. - Higher-hazard occupancies (e.g., heavy manufacturing, frame habitational with poor protection, significant CAT-exposed property) unless specifically approved in manuals or via underwriter. - Personal and commercial risks that fail manual-based risk acceptability criteria (e.g., severe loss frequency/severity, material underwriting red flags, or ineligible vehicle/dwelling types), which must not be bound without underwriter approval. Submission & Producer Notes - Agents are directed to use the online agent manuals by state and line of business as the controlling source for binding authority, risk acceptability, and class guidelines; any risk outside stated rules must be submitted for underwriter review before binding.([dev.wcm.grinnellmutual.com](https://dev.wcm.grinnellmutual.com/underwriting/agent-manuals/in-manual-page?utm_source=openai)) - For special and surplus-type risks, producers are instructed to work through Grinnell Specialty Agency and confirm the appropriate specialty broker; submissions generally go through the specialty email/phone contacts provided.([dev.wcm.grinnellmutual.com](https://dev.wcm.grinnellmutual.com/microsite/grinnell-specialty-agency/?utm_source=openai)) - Earthquake and other catastrophe-cover add-ons may be subject to moratoriums or additional underwriting restrictions by territory; local mutuals and agents are advised to monitor Grinnell bulletins and guidelines updates for changes.([heartlandmutualins.net](https://heartlandmutualins.net/news-events/?utm_source=openai)) Note: Grinnell’s detailed, class- and state-specific underwriting rules are contained in password-protected agent manuals and bulletins; the operational summary above reflects the high-level appetite and process currently visible from public and partner-facing materials. Always confirm final eligibility, limits, and moratoriums in the applicable state manual and current underwriting bulletins before binding.