 Citigroup Inc. grew its position in Mercantil Bank Holding Corp NASDAQ:AMTB by 49.0 during the first quarter, HoldingsChannel reports. The firm owned 5,778 shares of the companys stock after buying an additional 1,900 shares during the quarter. Citigroup Inc.s holdings in Mercantil Bank were worth 89,000 as of its most recent filing with the Securities ... 