http://www.cnbc.com/id/27723341
Per the above link:
* Conoco Phillips is Berkshire's LARGEST energy sector holding and now accounts for about 7.3% of Berkshire's total U.S. stock portfolio
* Berkshire held 'only' 17.5 million shares of COP as recent as March 31st, 2008...meaning that Buffett's position in Conoco has increased nearly FOUR-fold in just over 6 months (!)
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Per Berkshire's 3Q08 13F SEC Filings :
* Buffett reduced stock holdings in: Bank of America (BAC), Carmax (KMX), Home Depot (HD), Lowe's (LOW), United Health Group (UNH), Wells Fargo (WFC) and Wellpoint (WLP)
* Buffett increased stock holdings in: Conoco Phillips (COP), Eaton Corporation (ETN), NRG Energy (NRG), US Bancorp (USB) and Comdisco (CDCO)
* Berkshire's CASH holdings as of 9/30/08 were $33.4 Billion (vs. $47.1 Billion a year ago)
Data Courtesy: CNBC.com
Full Disclosure: I own shares of COP and UNH.