Billionaire hedge fund manager Bill Ackman has had his ups and his downs. Ackman has lost big before, in Valeant and shorting Herbalife. He has also won big with McDonalds and Chipotle. So far 2019, Ackman is up big. According to the Pershing Square Holdings, LTd website, NAV is up 38.4% year to date as of May 14. Unlike some other hedge funds that trade thousands of s tocks, Ackman makes focused buys, so it's relatively easy for the average investor to track his buys and sells. Let's take a closer look at what Ackman did in Q1.