DOSSIER · 13F Holders · Q2 2026
CIENA CORP
6 institutions still hold CIENA CORP as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.
CUSIP 171779959·6 13F holders·last filed Jun 30, 2026
AI Holders Summary · Q2 2026
6 institutions reported CIENA CORP in Q2 2026. IMC-Chicago, LLC leads at 76.2% of the visible book.
Top holders
Sorted by position value. Source: SEC EDGAR 13F-HR filings.