Jim Simons's position in Westinghouse Air Brake Technologies is currently worth $21.9 Million. That's 0.03% of their equity portfolio (566th largest holding). The first Westinghouse Air Brake Technologies trade was made in Q2 2013. Since then Jim Simons bought shares thirteen more times and sold shares on fourteen occasions. The stake costed the investor $12.8 Million, netting the investor a gain of 71% so far.