CIENA CORP — institutional ownership

7 funds reported holding CIENA CORP in their latest 13F filings, worth $352M in total (CUSIP 171779959).

Largest holders

1. IMC-Chicago, LLC — $229M
2. HRT FINANCIAL LP — $50.4M
3. GROUP ONE TRADING LLC — $46.8M
4. SIMPLEX TRADING, LLC — $23.8M
5. SG Americas Securities, LLC — $1.96M
6. JPMORGAN CHASE & CO (JPM, AMJB, VYLD, JPM-PC, JPM-PD, JPM-PJ, JPM-PK, JPM-PL, JPM-PM) — $671K
7. AlphaCore Capital LLC — $138K