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Carlyle Group is one of the world's largest alternative-asset managers, with $485.5 billion in total AUM, including $334.4 billion in fee-earning AUM, at the end of June 2026. The company has three core business segments: global private equity, which includes its private equity, real estate, infrastructure, and natural resources offerings (with $162.7 billion in total AUM and $96.6 billion in fee-earning AUM), global credit ($211.1 billion/$167.6 billion), and investment/fund solutions, known as Carlyle AlphInvest ($111.7 billion/$70.2 billion). The firm primarily serves institutional investors and high-net-worth individuals. Carlyle operates through 29 offices across five continents, serving more than 3,100 active carry fund investors from 87 countries.

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.