Direct Answer
Ciena reports revenue across 4 business segments in its fiscal 2025 Form 10-K. Networking Platforms is the largest, with $3.7 billion of revenue (77% of the total), followed by Global Services at $614 million (13%).
How Does Ciena Make Money?
Networking Platforms supplies 77% of revenue, so Ciena's results move mostly with that one business; the others matter more for diversification than for the headline number. Between fiscal 2024 and 2025, Blue Planet Automation Software and Services grew fastest (+48.9%) and Platform Software and Services slowest (+1.6%), so the revenue mix tilts toward Blue Planet Automation Software and Services while that gap lasts.
| Segment | FY2025 revenue | FY2024 revenue | Share of revenue | Change |
|---|---|---|---|---|
| Networking Platforms | $3.7 billion | $3.0 billion | 77.1% | 20.9% |
| Global Services | $614 million | $537 million | 12.9% | 14.2% |
| Platform Software and Services | $364 million | $358 million | 7.6% | 1.6% |
| Blue Planet Automation Software and Services | $116 million | $78 million | 2.4% | 48.9% |
What the Segment Figures Do Not Show
The rows above add up to 100% of Ciena's reported revenue for fiscal 2025; the difference is intersegment eliminations, corporate revenue or items the company reports outside its segments. Segment definitions are management's choice and change when a company reorganizes, in which case it restates prior years in the next filing, so a multi-year comparison should use the figures from a single filing. Revenue shows where sales come from, not where profit or cash is earned: a small segment can carry most of the margin.
Where These Numbers Come From
Every figure on this page is a value Ciena reported in the segment note and revenue disclosures of its Form 10-K filed December 12, 2025 (accession 0001628280-25-056698), read from the SEC's Financial Statement Data Sets. The prior-year column is the comparative figure from that same filing, so it reflects any restatement for a change in segments. Category names are the company's own XBRL labels, lightly reformatted for reading.
Rows that only total other rows (for example a "Products" line beside the individual products) are left out so nothing is counted twice. This page is educational and describes reported history for fiscal 2025; it is not a forecast or a recommendation.
Frequently Asked Questions
What are Ciena's business segments?
In its fiscal 2025 Form 10-K, Ciena reports revenue for Networking Platforms, Global Services, Platform Software and Services and Blue Planet Automation Software and Services.
Which part of Ciena brings in the most revenue?
Networking Platforms, with $3.7 billion of revenue in fiscal 2025, or 77% of the total.
Where does Ciena report its segment results?
In the segment note to the financial statements in its Form 10-K, most recently filed December 12, 2025, alongside management's discussion of each segment's results.