$MACK Merrimack Pharmaceuticals, Inc. (MACK) has a 52-Week High of $7.14 MACK http://stockcharts.com/c-sc/sc?s=mack&p=D&b=5&g=0&i=p24597972749&r=1363673449596%5B/img%5D%5B/img%5D http://standardoracle.com/2017/05/18/merrimack-pharmaceuticals-inc-mack-has-a-52-week-high-of-7-14/