CIENA CORP
Ciena Corporation is an American optical networking systems and software company based in Hanover, Maryland. The company reported revenues of $4.8 billion and more than 9,000 employees, as of November 2025. Gary Smith has been president and chief executive officer (CEO) since 2003.
Basic company information
Each field links to its source. Financial figures retain their reporting periods; background references are identified in the source list.
- Ticker / security symbols
- CIEN [1]
- Listing exchanges
- NYSE [1]
- SEC industry
- Telephone & Telegraph Apparatus [1]
- Business sectors
- telecommunications industry [2]
- Company / filing name
- CIENA CORP [1]
- Headquarters location
- Hanover [2]
- Business address
- 7035 RIDGE ROAD, HANOVER, MD, 21076 [1]
- Founded
- 1999 [2]
- Legal form
- Delaware corporation [2]
- Incorporation jurisdiction
- Maryland, United States [1]
- Official website
- www.ciena.com ↗ [2]
- Fiscal year end
- October 31 (SEC record) [1]
- ISIN (reported securities)
- US1717793095 [2]
- CIK
- 0000936395 [1]
- SIC code
- 3661 [1]
- Country in background record
- United States [2]
Company positioning and business
Ciena Corporation is an American optical networking systems and software company based in Hanover, Maryland. The company reported revenues of $4.8 billion and more than 9,000 employees, as of November 2025. Gary Smith has been president and chief executive officer (CEO) since 2003. [3]
Customers include AT&T, Deutsche Telekom, KT Corporation and Verizon Communications. [3]
Background text: Wikipedia contributors, Ciena. Selected introductory paragraphs, licensed under CC BY-SA 4.0. Official filing data is cited separately.
Financial year, securities and disclosures
The SEC submissions record gives CIENA CORP a fiscal year end of 1031 (MMDD). Individual filings below identify their own reporting period; the filing date is the publication event, not the financial year end. [1]
Listed securities: CIEN (NYSE). Multiple symbols may represent different share classes or securities of the same registrant. [4]
History and key events
Financial results and regulatory disclosures
Annual, quarterly and current reports from the collected SEC record. Insider Forms 4 and 144 are excluded. This is a selected list, not a live filing feed.
Source-verified relationships
Related entities and concepts
Frequently asked questions
When was CIENA CORP founded?
Founded: 1999. The linked source provides the background record. [2]
Where is the headquarters of CIENA CORP?
Headquarters location: Hanover. The linked source provides the background record. [2]
Which business sectors are recorded for CIENA CORP?
Business sectors: telecommunications industry. The linked source provides the background record. [2]
CIENA CORP relationship map
Select a node to inspect its relationship and source.
2 verified direct relationships. Industry peers are not relationship edges.
Sources and review dates
- SEC — CIENA CORP filing identity and securities ↗
- Wikidata — company background record (CC0) ↗
- Wikipedia contributors — Ciena (CC BY-SA 4.0) ↗
- SEC securities directory ↗
- Company chronology / filing ↗
Reviewed 23 October 2026. Financial periods and historical event dates are shown separately. Figures reflect their stated source dates; this page is not a live quote or investment recommendation.