Warren Buffett's company, Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B), can't seem to get enough of Occidental Petroleum (NYSE: OXY). The conglomerate recently purchased another 8.9 million shares of the oil company for $405 million.

Berkshire Hathaway's increased stake in Occidental Petroleum Corporation shows confidence in its potential amidst oil price volatility. Click for more on OXY.

Key Takeaways Warren Buffett's Berkshire Hathaway has added to its holdings of shares of Occidental Petroleum and SiriusXM Holdings.According to regulatory filings, Berkshire Hathaway purchased 8.9 million shares of Occidental Petroleum and 5.