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
3Distinct source URLs
19High confidence
0.874Average confidence
2026-09-13Latest 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 has not yet been matched to upstream suppliers in our database, or is still being processed.

Ciena Corporation Customers

TickerNameConfidenceEvidence
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…
T AT&T Inc. 92% Reciprocal relationship from T graph: Reciprocal relationship from CIEN graph: 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 reve…
T AT&T Inc. 92% 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

InstrumentDescriptionConfidenceEvidence
CIEN-DEBT-8644 Xbrl Convertible 90% xbrl convertible detail from xbrl 2022-07-30.
CIEN-DEBT Debt stack $1.5B 90% Market cache reports total debt of $1.5B.

Ciena Corporation Acquisitions

No acquisitions on recordNo completed or pending acquisitions found in our database for Ciena Corporation.

Ciena Corporation Ownership

HolderNameConfidenceEvidence
CIEN-OWNER-FMR-LLC FMR LLC 90% 13F overlay lists FMR LLC as top holder; 1085 tracked holders.

Ciena Corporation Extended Supply Chain Network

TickerNameChain IndexHopsRelationship Types
LUMN Lumen Technologies, Inc. 100.00 2
TMUS T-Mobile US, Inc. 100.00 2
T AT&T Inc. 63.48 1 ['customer']
JAPAN JAPAN 54.19 1 ['receiving']
INDIA INDIA 54.19 1 ['receiving']
HCC Warrior Met Coal, Inc. 50.00 2
HTFL Heartflow, Inc. 50.00 2
KLAC KLA Corporation 50.00 2
UTSI UTStarcom Holdings Corp. 50.00 2
SATS EchoStar Corporation 50.00 2
AGCC Agencia Comercial Spirits Ltd 50.00 2
DOX Amdocs Limited 50.00 2
VC Visteon Corporation 50.00 2
DLR Digital Realty Trust, Inc. 50.00 2
AMR Alpha Metallurgical Resources, Inc. 50.00 2
DY Dycom Industries, Inc. 50.00 2
CURB Curbline Properties Corp. 50.00 2
MKSI MKS Inc. 50.00 2
VALE Vale S.A. 50.00 2
PFE Pfizer Inc. 50.00 2
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CIEN
Unlock CIEN Supply Chain Data
Verified relationships include:
CLOUD-PROVIDERCLOUD-PROVIDERCustomer92%
CLOUD-PROVIDER-ACLOUD-PROVIDER-ACustomer92%
+16 more relationships locked
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