Buffett's Berkshire Hathaway Now Holds Almost 12% of Bank of America

Buying shares of Bank of America (NYSE: BAC) is a habit Warren Buffett just can't seem to shake. According to a regulatory filing submitted late Tuesday, the renowned investor's Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) has spent $2.07 billion since the middle of last month on Bank of America common stock in a series of purchases. This gives Berkshire a stake of 11.9% in the big lender, making it the largest publicly traded company in its portfolio in terms of total number of shares.