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Waterstone Financial Inc is a holding company. Through its subsidiaries, it operates in two reportable segments: Community Banking and Mortgage Banking. The Community Banking segment provides consumer and business banking products and services to customers, which include various types of loans, deposits, and personal investment services. The Mortgage Banking segment involves residential mortgage loans for the primary purpose of sale in the secondary market. The majority of its revenue comes from the Community Banking 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.