Steven Cohen's position in ATI is currently worth $384M. That's 0.61% of their equity portfolio (23rd largest holding). The investor owns 1.42% of the outstanding ATI stock. The first ATI trade was made in Q3 2014. Since then Steven Cohen bought shares 21 more times and sold shares on twenty occasions. The stake costed the investor $139M, netting the investor a gain of 175% so far.