Warren Buffett is still buying Occidental Petroleum, adding shares worth $1.5 billion
OXY: Here's Why Warren Buffett Is So Bullish on Occidental Petroleum?
Investment great Warren Buffett loads up on Occidental Petroleum – The Average Joe
Warren Buffett Boosts Occidental Stake, Adds 3.46 Million Shares | Nasdaq
Warren Buffett's Berkshire Hathaway ups stake in Occidental Petroleum, again | Fox Business
 "Warren Buffett's company has bet over $45 billion on the oil sector")
Warren Buffett's company has bet over $45 billion on the oil sector
Warren Buffett's Berkshire Hathaway Sells Common Stock in Occidental Petroleum - Bloomberg
warren buffett portfolio: Here's why Warren Buffett loves oil giant Occidental Petroleum - The Economic Times
Warren Buffett Is Buying Shares of Occidental Petroleum Again -- but Another Stock Is Still Tops on His List | The Motley Fool
Warren Buffett's Berkshire Hathaway boosts its stake in Occidental Petroleum - MarketWatch
Warren Buffett says Berkshire Hathaway won't take full control of Occidental Petroleum
Berkshire Hathaway cleared to buy up to 50% of Occidental Petroleum. - The New York Times
Berkshire Hathaway boosts stake in Occidental Petroleum to 24.4% | Reuters
Warren Buffett's firm buys more Occidental Petroleum and now owns more than 25% of the oil producer | AP News
Warren Buffett Just Bought All the Occidental Petroleum (OXY) Shares He Could | Moneywise
Berkshire Hathaway approved to buy up to half of Occidental Petroleum
Warren Buffett's Berkshire Hathaway buys more Occidental Petroleum shares
Warren Buffett Adds to Occidental Petroleum Corp Stake
Why Warren Buffett, Berkshire Bet $25 Billion on Chevron, Occidental
Warren Buffett gets permission to buy up to half of Occidental Petroleum, boosting the shares
OXY Stock Alert: Warren Buffett Says He Won't Acquire Occidental Petroleum | InvestorPlace
