Berkshire Hathaway Inc. (Berkshire) is a holding company owning subsidiaries engaged in a number of diverse business activities. The most important of these are insurance businesses conducted on both a primary basis and a reinsurance basis. Berkshire also owns and operates a large number of other businesses engaged in a variety of activities. Berkshire’s insurance and reinsurance business activities are conducted through approximately 70 domestic and foreign-based insurance entities. Berkshire’s insurance businesses provide insurance and reinsurance of property and casualty risks world-wide and also reinsure life, accident and health risks world-wide. Berkshire’s insurance underwriting operations are comprised of sub-groups: GEICO and its subsidiaries, General Re and its subsidiaries, Berkshire Hathaway Reinsurance Group and Berkshire Hathaway Primary Group. On February 12, 2010, the Company acquired all of Burlington Northern Santa Fe Corporation (BNSF).