Data compiled by Redley Lamar · ChainSifter Intelligence
0Suppliers
17Customers
2Debt Items
20Related Chains
Source-Backed Evidence Depth
Ciena Corporation (CIEN) is shown with relationship data already present in ChainSifter's database. Counts below come from stored supply-chain records and filing/source URLs where available; missing source URLs are not filled in or estimated.
20Total relationships
4Distinct source URLs
19High confidence
0.874Average confidence
2026-10-28Latest database update
ChainSifter does not infer unreported suppliers, customers, ownership, acquisitions, debt exposure, revenue dependency, or future supply-chain events on this public page.
Ciena Corporation Suppliers
No suppliers on recordCiena Corporation does not appear to disclose named supplier relationships in its verified regulatory filings, or upstream suppliers have not yet been identified. Our system processes new filings continuously.
Ciena Corporation Customers
Ticker
Name
Confidence
Evidence
CLOUD-PROVIDER
CLOUD-PROVIDER
92%
Sales to one cloud provider were $851.6 million, or 17.9% of total revenue in fiscal 2025 and $532.3 million or 13.3% of total revenue in fiscal 2024.
CLOUD-PROVIDER-A
CLOUD-PROVIDER-A
92%
For the periods indicated, the only customers that accounted for 10% or more of total revenue were as follows...Cloud provider A $ 321,224 $ 151,345 $ 652,206 $ 320,242
CLOUD-PROVIDER-B
CLOUD-PROVIDER-B
92%
For the periods indicated, the only customers that accounted for 10% or more of total revenue were as follows...Cloud provider B 212,288 n/a* 372,493 n/a*
SERVICE-PROVIDER
SERVICE-PROVIDER
92%
For the periods indicated, the only customers that accounted for 10% or more of total revenue were as follows...Service provider n/a* 117,355 n/a* 228,379
SERVICE-PROVIDER-A
SERVICE-PROVIDER-A
92%
For the periods indicated, the only customers that accounted for 10% or more of total revenue were as follows (in thousands): Quarter Ended January 31, February 1, 2026 2025 Cloud provider A $ 330,98…
SERVICE-PROVIDER-B
SERVICE-PROVIDER-B
92%
For the periods indicated, the only customers that accounted for 10% or more of total revenue were as follows (in thousands): Quarter Ended January 31, February 1, 2026 2025 Cloud provider A $ 330,98…
Reciprocal relationship from T graph: Reciprocal relationship from CIEN graph: Reciprocal relationship from T graph: Reciprocal relationship from CIEN graph: Reciprocal relationship from T graph: Rec…
Sales to AT&T were $500.7 million, or 10.5% of total revenue, in fiscal 2025, and $475.3 million, or 11.8% of total revenue, in fiscal 2024.
HONG-KONG
HONG-KONG
85%
decreased sales to Hong Kong
INDIA
INDIA
85%
decreased sales to India
JAPAN
JAPAN
85%
increased sales in Japan
NETHERLANDS
NETHERLANDS
85%
increased sales to cloud providers in the Netherlands
SERVICE-PROVIDERS
SERVICE-PROVIDERS
85%
increased sales to service providers, each primarily in the United States.
SINGAPORE
SINGAPORE
85%
increased sales in Singapore
SUBMARINE-NETWORK-OPERATORS
SUBMARINE-NETWORK-OPERATORS
85%
decreased sales to submarine network operators
UNITED-KINGDOM
UNITED-KINGDOM
85%
service providers in the United Kingdom
NUBIS-COMMUNICATIONS-INC
NUBIS-COMMUNICATIONS-INC
62%
and automation and to meet accelerating demand for bandwidth and digital services. This strategy leverages our optical leadership, routing and switching capabilities, automation software, and service…
Ciena Corporation Debt Obligations
Instrument
Description
Confidence
Evidence
CIEN-DEBT
Debt stack $1.5B
90%
Market cache reports total debt of $1.5B.
CIEN-DEBT-8644
Xbrl Convertible
90%
xbrl convertible detail from xbrl 2022-07-30.
Ciena Corporation Acquisitions
No acquisitions on recordNo completed or pending acquisitions found in our database for Ciena Corporation.
Ciena Corporation Ownership
Holder
Name
Confidence
Evidence
CIEN-OWNER-FMR-LLC
FMR LLC
90%
13F overlay lists FMR LLC as top holder; 1085 tracked holders.
