Mercury General is a personal lines property and casualty insurer focused on auto and homeowners insurance for individual consumers. Personal auto accounts for roughly 60% of direct premiums written, followed by homeowners at roughly 27%, with commercial auto and other lines making up the rest. The company is heavily concentrated in California, which represents about 82% of direct premiums written, making Mercury General the eighth-largest personal auto insurer in that state. Mercury General sells almost entirely through a network of roughly 8,500 independent agents, who account for about 88% of premiums. Mercury General pays above-market commissions to attract and retain agents, who can shop multiple carriers on behalf of customers. Mercury General makes money two ways: underwriting profit and investment income. Underwriting profit is driven by loss ratios in auto and homeowners, rate adequacy, and expense management. California requires prior regulatory approval for rate changes, which can cause pricing to lag rising costs. Investment income comes from a large fixed-income portfolio and has been growing as maturing bonds are reinvested at higher rates. Catastrophe exposure — particularly California wildfires — is a key earnings risk given the company's geographic concentration. Mercury General manages this through a large reinsurance program, which for the year ending June 2026 covers up to $2.14B above a $200M per-occurrence retention, and through subrogation rights to pursue cost recovery from third parties responsible for causing fires.