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If you own Ciena (CIEN) or Arista Networks, you own one idea: AI is driving fast growth in network traffic, and both sell the equipment that carries it. Both raised their revenue outlooks in their latest reports, and both say they could ship more if supply loosened. Then the pair splits. Ciena's case rests on orders it cannot yet fill, while Arista already keeps about 43 cents of every sales dollar as operating profit.
Does Ciena's Backlog Make Its Outlook Safer Than Arista's?
Ciena's outlook leans on orders it already holds. The company raised its fiscal 2026 revenue outlook midpoint to $6.42 billion, and its backlog stood at $8.5 billion when its fiscal third quarter ended on August 1. Management expects that backlog to top $10 billion by the end of fiscal 2026, and says it covers most of a fiscal 2027 outlook for revenue growth of at least 30%.
Arista's raise is a different kind of statement. It lifted its 2026 revenue outlook for the third time, to $12.6 billion, citing an improving supply position, and its CFO says the company has about two quarters of visibility with customers. Neither management expects supply to catch up before 2028. So Ciena's backlog makes its outlook safer only if supply lets it ship those orders.