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Ciena Corporation

Ciena Corporation is an American optical networking systems and software company based in Hanover, Maryland. The company has been described as a vital player in optical connectivity. The company reported revenues of $4.8 billion and more than 9,000 employees, as of November 2025. Gary Smith serves as president and chief executive officer. Customers include AT&T, Deutsche Telekom, KT Corporation and Verizon Communications.

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