Activist investor Bill Ackman takes stake in Starbucks amid US growth slump October 8, 2018 by quixnet Activist investor Bill Ackman takes stake in Starbucks amid US growth slumpLos Angeles Times Bill Ackman Bought Starbucks Stock. Should You?Investorplace.com Activist investor Bill Ackman’s hedge fund invests $900 million in StarbucksCNN Full coverage