EL7.AI
StocksMediumUpdated•Originally published 12 September 2026•Updated 12 September 2026•
2 min read

Ciena Revenue Jumps 37% to $1.67 Billion as AI-Network Demand Accelerates

Key Facts

1Fiscal third-quarter revenue rose 37% to $1.67 billion from $1.22 billion.
2Adjusted EPS reached $2.11, up 215% from $0.67.
3Optical Networking revenue grew 46.1% to $1.191 billion and represented 71.3% of the total.
4Ciena raised fiscal 2026 revenue guidance to $6.42 billion, plus or minus $50 million.

Ciena reported fiscal third-quarter revenue of $1.67 billion for the period ended August 1, 2026, up 37% from $1.22 billion a year earlier. The company said demand tied to AI investment and cloud applications continued to drive momentum in its networking business.

Adjusted EPS reached $2.11, up 215% from $0.67, while GAAP EPS rose to $1.83 from $0.35. The adjusted measure excludes items identified by the company, so the GAAP figure remains the measure directly comparable with the statutory accounts.

Optical Networking generated most of the activity, with revenue rising 46.1% to $1.191 billion from $815.5 million and accounting for 71.3% of total revenue, versus 66.9% a year earlier. These systems carry high-capacity data between data centers and across long-distance networks.

In its investor presentation, Ciena said cloud-provider revenue represented 53% of the total and increased 82% year over year. Its regulatory filing also said orders significantly exceeded revenue and backlog was historically high, though those descriptions come from management and do not independently establish how long the demand cycle will last.

Profitability improved alongside growth: GAAP gross margin rose to 45.4% from 41.3%, while adjusted operating margin increased to 22.5% from 10.7%. Ciena attributed the gross-margin improvement to cost reductions, pricing optimization, product mix and tariff refunds.

Ciena expects fiscal fourth-quarter revenue of $1.75 billion, plus or minus $50 million, and raised its fiscal 2026 revenue forecast to $6.42 billion, plus or minus $50 million; the midpoint implies 35% annual growth. These are forward-looking estimates, not realized revenue.

Customer concentration and execution remain important risks: 2 large customers together represented 41.7% of quarterly revenue. Management's outlook also assumes that cloud providers sustain AI-infrastructure spending and that optical-component supplies remain stable, making demand and supply chains central issues for the next results.