CIENA CORP (CIEN) Institutional Ownership and Insiders Activity

CIENA CORP (CIEN) is widely held by institutional investors, with 1151 firms reporting positions valued at approximately $68.89B based on SEC Form 13F filings for the quarter ended June 30, 2026.

Fmr Llc is the largest disclosed holder, reporting approximately $9.38B in CIEN holdings in its latest filing.

Recent insider activity includes 50 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.