Schedule 13G ownership disclosure
CIENA CORP
Common Stock · CUSIP: 171779309
Event date: 2025-11-30
- Filing-level shares
- 14,537,914
- Percent of class
- 10.3%
- BlackRock, Inc.
Shares: 14,537,914 · Class: 10.3%
Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.
Source: SEC EDGAR filingFiling metadata
- Accession number
- 0002012383-25-002995
- Form type
- SCHEDULE 13G/A
- Filer
- BlackRock, Inc.
- CIK
- CIK 2012383
- Filed
- Dec 04, 2025
- Reporting period
- Nov 30, 2025
- Description
- Schedule 13G beneficial ownership