Steven Cohen acquired 1.99 Million CIENA shares worth $167 Million. That's 0.47% of their equity portfolio (51st largest holding). The investor owns 1.47% of the outstanding CIENA stock. The first CIENA trade was made in Q2 2015. Since then Steven Cohen bought shares eleven more times and sold shares on fourteen occasions. The stake costed the investor $139 Million, netting the investor a gain of 20% so far.