DOSSIER · 13F Holders · Q3 2026Technology · Telephone & Telegraph Apparatus
CIEN
CIENA CORP
1,220 institutions still hold CIENA CORP as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.
CUSIP 171779309·Telephone & Telegraph Apparatus·1,220 13F holders·last filed Sep 30, 2026
AI Holders Summary · Q3 2026
1,220 institutions reported CIEN in Q3 2026. FMR LLC leads at 17.1% of the visible book.
Top holders
Sorted by position value. Source: SEC EDGAR 13F-HR filings.
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