Berkshire now owns 264 million Occidental shares worth about $12 billion, a 28% stake in the big U.S.-focused energy company.

Shares of Occidental Petroleum Corp. shed 4.64% to $46.65 Friday, on what proved to be an all-around poor trading session for ...

Occidental Petroleum ( OXY) Fell to its lowest level in more than six weeks following a downgrade from Goldman Sachs. The ...