Morning Market Movers By: Benzinga via Benzinga May 01, 2014 at 09:37 AM EDT Merrimack Pharmaceuticals (NASDAQ: MACK) climbed 67.88% to $7.37 after the company reported that MM-398 has achieved primary endpoint of ... Read More >> Related Stocks: AT&T Inc DIRECTV Gentherm Inc Glu Mobile Inc Proofpoint Inc Willis Towers Watson Public Ltd Yelp Inc