Carl Icahn acquired 1.53 Million Greenbrier Cos. shares worth $68.4 Million. That's 0.93% of their equity portfolio (10th largest holding). The investor owns 4.96% of the outstanding Greenbrier Cos. stock. Carl Icahn acquired their 1.53 Million shares in Q1 2008. So far they never sold any shares in the company. The stake costed the investor $36.3 Million, netting the investor a gain of 88% so far.