Who Ciena buys from and sells to
Sells optical transport systems and coherent modules that link data centres and carry telecom traffic.
Buys from 3
Where the chain could break
- Two customers were 28.4% and the top five 49.7% of FY2025 revenue
- Growth now leans on a few cloud providers' AI data centre interconnect builds
Competes with
Mapped by hand from filings and company reporting, as of October 2026. It shows the relationships that matter most, not every contract: most are never disclosed, and agreements change.