Steven Cohen acquired 2.75M CIENA shares worth $322M. That's 0.77% of their equity portfolio (17th largest holding). The investor owns 2.42% of the outstanding CIENA stock. The first CIENA trade was made in Q2 2015. Since then Steven Cohen bought shares twelve more times and sold shares on fourteen occasions. The stake costed the investor $194M, netting the investor a gain of 66% so far.