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Rocket Companies is a financial services company that was originally founded as Rock Financial in 1985 and is currently based in Detroit. Rocket Companies offers a wide array of services and products but is best known for its Rocket Mortgage business. The company's mortgage lending operations are split between its direct-to-consumer lending, which sees borrowers accessing the company's lending arm directly through either its mobile app or website, and its partner network where mortgage brokers and other firms use Rocket's origination process to offer loans to their customers. The company has rapidly gained market share in recent years and will also be the largest mortgage servicer in the US following its acquisition of the Mr. Cooper Group.

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.