Berkshire Hathaway Inc (NYSE:BRK.B) (NYSE:BRK.B)’s stake in Apple as of August 21 ($125 billion), plus its cash as of June 30 ($147 billion), plus its stock portfolio less Apple as of June 30 ($113 billion) equal $385 billion. Its current market value equals $495 billion. Subtracting $385 billion (stock portfolio plus cash) = $110 billion. Adding its insurance float (expected future claims on its insurance policies) of $130 billion (June 30), results in an “enterprise value” of $240 billion for all of its 60+ businesses including the major segments of insurance, BNSF Railroad, and Berkshire Ha…