Berkshire Hathaway is paying around 30% more for Burlington Northern’s shares than their price on the day before the deal was announced, and barely 10% less than their all-time high.

Warren Buffett’s Berkshire Hathaway investment company said it would buy the remaining large chunk of Burlington Northern Santa Fe it does not already own.

News Corp is one of 28 companies rated "opaque", along with popular bogeymen such as Halliburton and walmart-and fashionable firms such as Amazon, Berkshire Hathaway, Google, Nike and Walt Disney.