Could Relypsa Be The Next Big Pharma Buyout Target? By: Benzinga via Benzinga November 06, 2015 at 11:03 AM EST Relypsa Inc (NASDAQ: RLYP) shares are down 38 percent year-to-date, while shares of ZS Pharma Inc (NASDAQ: ZSPH) are up 14 ... Read More >> Related Stocks: Astrazeneca Plc ADR