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Hennessy Advisors Inc is an investment management company that manages and markets open-end mutual funds branded as the Hennessy Funds. It offers domestic equity, multi-asset sectors, specialty products, and fixed income products. The company earns revenues mainly from investment advisory services and secondarily from shareholder services. Advisory services include managing each fund's portfolio in line with its investment objectives, monitoring compliance and performance, overseeing sub-advisors and other service providers, and handling marketing, distribution, and regulatory reporting. Shareholder services cover investor support and coordination with the fund service provider, with all related fees based on the funds' average daily net asset values.

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.