Benzinga's M&A Chatter for Wednesday May 20, 2015 By: Benzinga via Benzinga May 20, 2015 at 20:28 PM EDT The following are the M&A deals, rumors and chatter circulating on Wall Street for Wednesday May 20, 2015: Altice CEO Says Most US ... Read More >> Related Stocks: Cablevision Systems Comcast Corp EXOSF Express Inc Macy's McKesson Corp Monsanto Co Syngenta AG ADS Time Warner Cable Walgreens Boots Alliance