© REUTERS/Rick Wilking Berkshire Hathaway Chairman Warren Buffett talks with a shareholder before the company’s annual meeting in Omaha May 4, 2013. REUTERS/Rick Wilking Warren Buffett’s Berkshire Hathaway cut its stake in Wells Fargo to 3.3%, its lowest level since 2003. The billionaire investor’s company owned more than 13% of […]