Berkshire Adds Archer-Daniels, Verisign; Boosts GM Stake

Warren Buffett's Berkshire Hathaway

is now among the largest shareholders of agriculture products company Archer-Daniels-Midland

after buying more than 5.95 million shares of the company in the fourth quarter. The new position was revealed in

. The investment in Archer-Daniels-Midland is Berkshire's second in recent quarters in the agriculture sector. In the third quarter of 2012, Berkshire bought shares of farm equipment maker Deere

and held nearly 4 million shares of that company at the end of the fourth quarter. Berkshire also initiated a position in VeriSign

, purchasing nearly 3.7 million shares of the Internet infrastructure services provider in the fourth quarter. That is enough to place Berkshire among the top-10 VeriSign shareholders. Buffett also appears to be bullish on General Motors

as Berkshire now owns 25 million shares of the U.S. auto giant,

. Berkshire also boosted its stake dialysis provider DaVita HealthCare Partners

, but once again pared its investment in Dow component Johnson & Johnson

.