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London Stock Exchange Group (LSEG) is a global financial markets infrastructure and data services company headquartered in London, United Kingdom. The company operates through several segments, including Capital Markets, Post Trade, and Data & Analytics. LSEG is known for its stock exchange services and also provides clearing, settlement, and risk management services through its subsidiaries. It was founded in 1801 and has acquired significant businesses, including Refinitiv, to expand its data and analytics capabilities. LSEG's competitive strengths lie in its comprehensive financial data offerings and diversified revenue streams across different market infrastructures.

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.