Warren Buffett's Berkshire adds ADM, more Wal-Mart in fourth qtr
February 14, 2013 at 17:51 PM EST
Feb 14 (Reuters) - Warren Buffett's conglomerate Berkshire Hathaway took a new stake in agribusiness heavyweight Archer Daniels Midland Co in the fourth quarter and added to positions in old favorites like Wal-Mart Stores Inc , according to a regulatory filing on Thursday.