Form SCHEDULE 13G - Statement of Beneficial Ownership by Certain Investors:
SEC Accession No. 0002100121-26-000185
Filing Date
2026-04-29
Accepted
2026-04-29 12:24:54
Documents
1
X0202

Document Format Files

Seq Description Document Type Size
1 primary_doc.html SCHEDULE 13G  
1 primary_doc.xml SCHEDULE 13G 5549
  Complete submission text file 0002100121-26-000185.txt   7198
Mailing Address 7035 RIDGE ROAD HANOVER MD 21076
Business Address 7035 RIDGE ROAD HANOVER MD 21076 4108658500
CIENA CORP (Subject) CIK: 0000936395 (see all company filings)

EIN.: 232725311 | State of Incorp.: MD | Fiscal Year End: 1031
Type: SCHEDULE 13G | Act: 34 | File No.: 005-54195 | Film No.: 26912741
SIC: 3661 Telephone & Telegraph Apparatus
(CF Office: 04 Manufacturing)

Mailing Address 100 VANGUARD BLVD MALVERN PA 19355
Business Address 100 VANGUARD BLVD MALVERN PA 19355 610-669-6148
VANGUARD PORTFOLIO MANAGEMENT LLC (Filed by) CIK: 0002100121 (see all company filings)

EIN.: 392888838 | State of Incorp.: PA | Fiscal Year End: 1231
LEI: 529900YN99W7NU4H6B84
Type: SCHEDULE 13G