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INVENTORIES (Tables)

12 Months Ended

Nov. 01, 2025

Inventory Disclosure [Abstract]

Schedule of Inventories

As of the dates indicated, inventories are comprised of the following (in thousands):

			November 1, 2025						November 2, 2024
Raw materials			$	593,783					$	542,785
Work-in-process			35,051						32,219
Finished goods			286,050						324,697
Deferred cost of goods sold			40,759						27,902
Gross inventories			955,643						927,603
Reserve for excess and obsolescence			(129,408)						(107,173)
Inventories, net			$	826,235					$	820,430

Schedule of Activity in Reserve for Excess and Obsolete Inventory

The following table summarizes the activity in Ciena’s reserve for excess and obsolete inventory for the fiscal years indicated (in thousands):

Year Ended						Beginning Balance						Provisions						Disposals						Ending Balance
October 28, 2023						$	36,086					$	29,464					$	15,547					$	50,003
November 2, 2024						$	50,003					$	77,341					$	20,171					$	107,173
November 1, 2025						$	107,173					$	48,424					$	26,189					$	129,408

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Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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-Topic 210
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-Name Accounting Standards Codification
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