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Can Ciena Convert Its $8.5B Backlog Despite Supply Constraints?

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Key Takeaways

  • Ciena exited Q3 fiscal 2026 with an $8.5B backlog, up $800M sequentially, and expects over $10B by year-end.
  • CIEN sees fiscal 2027 revenues of at least $8.3-$8.4B, with potential upside tied to greater supply.
  • Ciena finalized long-term agreements securing certain critical components supply through 2029.

Ciena Corporation (CIEN - Free Report) exited the third quarter of fiscal 2026 with an $8.5 billion backlog, up $800 million sequentially, supported by demand and order momentum. On the earnings call, management highlighted that just a month into the fiscal fourth quarter, orders were already approaching the total booked value in the fiscal third quarter. Ciena expects backlog to exceed $10 billion by the end of fiscal 2026.

The backlog provides strong revenue visibility, but supply remains the key factor determining how quickly Ciena can convert orders into sales. The company currently expects fiscal 2027 revenues of at least $8.3-$8.4 billion, representing minimum growth of 30% year over year, with potential supply-driven upside.

Ciena is investing in capacity and supply to accelerate absolute revenue growth. The company recently finalized long-term agreements securing certain critical components through 2029, including incremental capacity. It is investing upstream to ensure supply security and to balance supply and demand. However, Ciena said that these efforts are expected to reduce cash from operations in the fiscal fourth quarter as funds are disbursed to support the agreements.  

Ciena expects fiscal 2026 capital expenditures to come at the high end of its $250-$275 million range. Its investments have already added capacity sufficient to support year-to-date revenue growth of more than 60% across RLS, pluggables and Waveserver. The company ended the fiscal third quarter with $2.8 billion in cash and equivalents.  

Nonetheless, Ciena does not expect industry supply and demand to return to balance before fiscal 2028, suggesting that backlog conversion will remain capacity dependent. Meanwhile, the expected $10 billion-plus year-end backlog largely carries fiscal 2027 customer request date and covers most of the company’s full-year revenue guide, as highlighted by the management.

Mapping the Competitive Terrain

For Nokia (NOK - Free Report) , AI and cloud order intake reached €2.8 billion in the second quarter of 2026, helped by several significant long-term orders as customers sought to secure supply in a “constrained environment”. Management added that only about half of those orders are expected to convert into revenues within the next 12 months.

Nokia noted that supply constraints continue to affect portions of the optical networking market, contributing to longer-term customer ordering patterns. Management acknowledged that greater supply could drive higher revenues. To address this, Nokia is increasing optical test and packaging capacity tenfold in Pennsylvania.

Cisco (CSCO - Free Report) does not provide backlog numbers, but demand momentum remains strong. In the fourth quarter of fiscal 2026, Product orders increased 35% year over year, while Service Provider and Cloud product orders surged 95%. Networking product orders climbed 40%. Acacia also generated more than $1 billion in orders during the fiscal fourth quarter, while demand for 400G and 800G coherent pluggable optics remains strong.

Hyperscaler AI infrastructure orders totaled $4 billion in the fiscal fourth quarter, taking fiscal 2026 orders to $9.3 billion. The fiscal-year mix for these orders was approximately 60% Silicon One-based systems and 40% optics. Management highlighted that the company plans to roll out Silicon One across its high-performance networking systems by fiscal 2029. This will give Cisco “greater control” over the supply chain and innovation pipeline.

CIEN Price Performance, Valuation and Estimates

CIEN’s shares have lost 12.8% in the past month, while the Communications - Components industry has gained 3.9%.

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CIEN trades at a forward 12-month price-to-earnings (P/E) multiple of 36.07X, below the industry’s 38.38X.

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The Zacks Consensus Estimate for CIEN’s earnings for fiscal 2026 has been revised marginally upward over the past 60 days.

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CIEN currently sports a Zacks Rank #1 (Strong Buy). You can see the complete list of today’s Zacks #1 Rank stocks here.

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