Liberty Mutual Workers' Compensation Insurance

Liberty Mutual was founded in 1912 in Boston, Massachusetts, and operates as a mutual insurance company, meaning it is owned by its policyholders rather than shareholders. It has grown into one of the largest property-casualty insurers globally, with personal and commercial lines operations spanning the U.S. and international markets. On September 10, 2025, AM Best affirmed a Financial Strength Rating of A (Excellent) and a Long-Term Issuer Credit Rating of a (Excellent) for Liberty Mutual Insurance Company, with a stable outlook, citing the company's balance-sheet strength and business profile as a top-ten U.S. property-casualty insurer.

Liberty Mutual writes workers' compensation across a wide range of account sizes, from small commercial employers to large national and multinational programs, and it maintains dedicated risk-control and claims resources as part of its commercial offering, including safety consulting aimed at reducing workplace injuries and managing claims once they occur. Its scale as a global insurer supports appetite for complex or multi-state risks that smaller, regional carriers may not pursue.

Liberty Mutual distributes its commercial workers' compensation program primarily through independent agents and brokers rather than selling directly to businesses. A business can access Liberty Mutual's program alongside other carrier options through a licensed agency, which can help determine whether a large, globally diversified insurer or a smaller specialist carrier is the better fit for a given account. Liberty Mutual's size and mutual ownership structure are sometimes cited by policyholders as reasons they value its long-term financial stability and claims-paying capacity across economic cycles and market conditions.