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Employers Holdings Inc is a provider of workers' compensation insurance and services focused on small and mid-sized businesses engaged in low-to-medium hazard industries. Its customers are employers, and the insurance premiums that those employers pay to account for company revenue. Substantially all of the remaining revenue is generated through investments. The company operates exclusively in the United States, and it generates more than half of its business in California. By industry, the company has exposure to restaurants, which account for roughly a fourth of the total premiums the company earns. It operates as a single reportable segment, Insurance Operations through its wholly owned subsidiaries.

Berkshire Hathaway is a holding company with a wide array of subsidiaries engaged in diverse activities. The firm's core business segment is insurance, run primarily through Geico, Berkshire Hathaway Reinsurance Group, and Berkshire Hathaway Primary Group. Berkshire has used the excess cash thrown off from its operations to acquire Burlington Northern Santa Fe (railroad), Berkshire Hathaway Energy (utilities and energy distributors), and the companies that make up its manufacturing, service, and retailing operations (which include Precision Castparts, Lubrizol, Clayton Homes, Marmon, and IMC/ISCAR). The conglomerate is unique in that it is run on a completely decentralized basis.