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Bank of Montreal is a diversified financial services provider based in North America with over CAD 1.5 trillion in assets by the end of July 2026. BMO operates four business segments: Canadian personal and commercial banking, US personal and commercial banking, wealth management, and capital markets. About 60% of BMO's earnings are generated in Canada and 40% in the US.

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.