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NMI Holdings Inc through its subsidiaries provides private mortgage guaranty insurance. The company offers mortgage insurance, reinsurance on loans, and outsourced loan review services to mortgage loan originators. It serves national and regional mortgage banks, money center banks, credit unions, community banks, builder-owned mortgage lenders, Internet-sourced lenders, and other non-bank lenders. It protects lenders and investors from default-related losses on a portion of the unpaid principal balance of a covered mortgage.

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.