Ciena CorpAI-driven demand drove 37% revenue growth, backlog to $8.5B, and cloud provider revenue up over 80%

Ciena Corporation reported third-quarter fiscal 2026 results on September 3, with revenue climbing 37% year over year to $1.67 billion, adjusted earnings per share more than tripling to $2.11, and order backlog swelling to $8.5 billion. Backlog grew by $800 million in the quarter alone, and management said bookings in just the first month of the fourth quarter came close to matching all of the third quarter's orders, projecting more than $10 billion in backlog by the end of fiscal 2026 with visibility stretching into fiscal 2028. Optical networking revenue rose 46% to $1.19 billion, cloud provider revenue grew more than 80%, and interconnects revenue more than doubled, while adjusted gross margin reached a record 46.4% and adjusted operating margin hit 22.5%. Ciena signed long-term component agreements through 2029 to lock in supply, and executives said cash from operations is expected to decline in the fourth quarter as the company disperses funds to support those agreements. Two customers each accounted for more than 10% of revenue, together making up 41.7% of the total, and the new Canadian tariff regime was flagged as a potential $10 million-a-quarter headwind.
Ciena CorpAI-driven demand drove 37% revenue growth, backlog to $8.5B, and cloud provider revenue up over 80%