Investor Warren Buffett's company bought another $127 million worth of Occidental Petroleum stock over the past week to...

Billionaire Warren Buffett's company bought more than $200 million more Occidental Petroleum stock over the past week to...

Warren Buffett’s company now has clearance to boost its current 20% stake in Occidental Petroleum up to 50% of the oil p...

Warren Buffett's Berkshire Hathaway now controls nearly 20% of Occidental Petroleum's stock after picking up another $25...

Warren Buffett's Berkshire Hathaway bought more than $500 million worth of Occidental Petroleum shares over the past wee...