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Bank of Ireland Group plc, identified by ticker BIRG, is a significant financial services provider based in Dublin, Ireland, primarily offering a wide range of banking and financial products and services. The group operates in sectors that include retail and corporate banking, treasury operations, and consumer lending. Founded in 1783, Bank of Ireland is one of the oldest continuous operating financial institutions in Ireland and has expanded its services internationally.

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.