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National Bankshares Inc is a bank holding company. It focuses on lending to small and mid-sized businesses and individuals. The types of loans it offers include commercial and agricultural loans, commercial real estate, construction loans for commercial and residential properties, residential real estate, home equity, and various consumer loan products. It also operates an insurance and brokerage subsidiary. The company earns its revenue from interest and fees on loans, non-interest income, and investments.

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.