Berkshire Hathaway takes $3.7 billion stake in Exxon Mobil

Warren Buffett's conglomerate Berkshire Hathaway owned a stake of about 40 million shares in oil major Exxon Mobil as of the end of September, according to an SEC filing on Thursday.

Based on the most recently available holdings data, that would be enough to make Berkshire the 6th-biggest holder of Exxon shares, with about one percent of the shares outstanding.

The stake was worth $3.74 billion at Thursday's closing prices.