MFool: Why does Buffett own such a tiny_UPS_position?
"3 Stocks Warren Buffett Should Use His $149 Billion Stash to Buy"
"Berkshire Hathaway technically owns shares of package delivery giant UPS. But the stake makes up less than a hundredth of a percent of its portfolio. UPS is Buffett's smallest stock holding, but there are many reasons it deserves to be one of his largest."