Bill Ackman acquired 2.77M Hyatt Hotels shares worth $402M. That's 2.78% of their equity portfolio (10th largest holding). The investor owns 2.92% of the outstanding Hyatt Hotels stock. Bill Ackman acquired their 2.77M shares in Q4 2009. So far they never sold any shares in the company. The stake costed the investor $80.8M, netting the investor a gain of 397% so far.