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Mercury General Corp is an insurance holding company. It is engaged in writing personal automobile insurance and provides related property and casualty insurance products. The company offers the following types of automobile coverage: collision, property damage, bodily injury (BI), comprehensive, personal injury protection (PIP), underinsured and uninsured motorist, and other hazards. Additionally, it offers the following types of homeowners coverage: dwelling, liability, personal property, and other coverages. The company has one reportable business segment, the Property and Casualty business segment.

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.