Top 10 US Workers Compensation Insurers

$3.5B in WC premiums across diversified commercial lines. GUARD Insurance specializes in small-to-midsize business WC with a technology-forward underwriting platform. Berkshire's financial strength allows it to write guaranteed cost programs at competitive rates.

Berkshire Hathaway (GUARD Insurance)

$3.2B in WC premiums from its Boston headquarters. National accounts and guaranteed cost programs for Fortune 1000 clients are core strengths. Liberty Mutual's risk management consultants embed with large clients to reduce incident frequency before claims occur.

Liberty Mutual

$2.8B in WC premiums with a focus on large account risk management. Zurich's risk engineering team conducts on-site workplace safety assessments. Loss-sensitive structures (large deductible, retro programs) serve multinational corporations managing self-insured retentions.

Zurich North America

$2.5B in WC premiums from Columbus, OH-based mutual. Strong in agricultural workers comp for farm and agribusiness operations — a niche few national carriers serve effectively. SMB-focused appetite includes contractors, retail, and light manufacturing.

Nationwide

$700M in WC premiums. NASDAQ-listed (EIG) pure-play WC specialist focused exclusively on small businesses. Serves 100,000+ small employers in low-to-medium hazard industries. Proprietary AI-powered underwriting enables fast quotes and accurate small-account pricing.

Employers Holdings

$1.5B in WC premiums. San Diego-based Western US regional specialist offering dividend plans that return premiums to employers with favorable loss experience. ICW's SafetyFirst program provides safety training resources to policyholders at no additional cost.

ICW Group

$2B in WC premiums with a specialty and SMB focus. Taken private by the Karfunkel family in 2018 for $2.7B after reporting issues impacted its stock. Strong in WC for staffing, healthcare workers, and retail. International platform spans 8 countries.

AmTrust Financial

$1.8B in WC premiums from Chicago. Specializes in risk management services for mid-market and large accounts with complex WC exposures. CNA's managed care network reduces medical costs per claim through preferred provider agreements with hospital systems nationwide.

CNA Financial

$1.5B in WC premiums. Hartford, CT-based insurer offers spectrum coverage from SMB to national accounts. The Hartford's HealthConnect program integrates occupational health with workers comp claims management, accelerating return-to-work outcomes for injured employees.

Hartford Financial

$3.5B in WC premiums across diversified commercial lines. GUARD Insurance specializes in small-to-midsize business WC with a technology-forward underwriting platform. Berkshire's financial strength allows it to write guaranteed cost programs at competitive rates.

Berkshire Hathaway (GUARD Insurance)

$3.2B in WC premiums from its Boston headquarters. National accounts and guaranteed cost programs for Fortune 1000 clients are core strengths. Liberty Mutual's risk management consultants embed with large clients to reduce incident frequency before claims occur.

Liberty Mutual

$2.8B in WC premiums with a focus on large account risk management. Zurich's risk engineering team conducts on-site workplace safety assessments. Loss-sensitive structures (large deductible, retro programs) serve multinational corporations managing self-insured retentions.

Zurich North America

$2.5B in WC premiums from Columbus, OH-based mutual. Strong in agricultural workers comp for farm and agribusiness operations — a niche few national carriers serve effectively. SMB-focused appetite includes contractors, retail, and light manufacturing.

Nationwide

$700M in WC premiums. NASDAQ-listed (EIG) pure-play WC specialist focused exclusively on small businesses. Serves 100,000+ small employers in low-to-medium hazard industries. Proprietary AI-powered underwriting enables fast quotes and accurate small-account pricing.

Employers Holdings

$1.5B in WC premiums. San Diego-based Western US regional specialist offering dividend plans that return premiums to employers with favorable loss experience. ICW's SafetyFirst program provides safety training resources to policyholders at no additional cost.

ICW Group

$2B in WC premiums with a specialty and SMB focus. Taken private by the Karfunkel family in 2018 for $2.7B after reporting issues impacted its stock. Strong in WC for staffing, healthcare workers, and retail. International platform spans 8 countries.

AmTrust Financial

$1.8B in WC premiums from Chicago. Specializes in risk management services for mid-market and large accounts with complex WC exposures. CNA's managed care network reduces medical costs per claim through preferred provider agreements with hospital systems nationwide.

CNA Financial

$1.5B in WC premiums. Hartford, CT-based insurer offers spectrum coverage from SMB to national accounts. The Hartford's HealthConnect program integrates occupational health with workers comp claims management, accelerating return-to-work outcomes for injured employees.

Hartford Financial