By Karlee Weinmann (February 12, 2014, 3:01 PM EST) -- The founding family behind the fourth-biggest grocery chain in the U.K. is scouting out private equity firms to see whether they're interested in taking over Wm Morrison Supermarkets PLC in what could be one of the biggest retail buyouts that market has seen in years, Bloomberg reported on Wednesday. A takeover of the company would clock in at more than $11.5 billion. The Morrison family, which holds a 9.5 percent interest in its namesake company, has approached CVC Capital Partners, Carlyle Group LP and Apax Partners LP, but Apax has since dropped out of the running. The Morrison chain encompasses more than 400 stores. Its share price has sunk nearly 20 percent in recent months....