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Founded in 1973, Cboe controls the largest option exchange in the US, which provides around 60% of the firm's revenue. The company is best known for its proprietary S&P 500 and VIX index options, which it offers through an exclusive contract with S&P Global. The firm moved into US and European equities through the $3.4 billion acquisition of BATS in 2017. Cboe has continued to look to expand internationally, using acquisitions to build a presence in both Canada and Australia.

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.