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SHARE-BASED COMPENSATION EXPENSE (Tables)

12 Months Ended

Nov. 01, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Assumptions for Awards Granted

Assumptions for awards granted during fiscal 2025, fiscal 2024 and fiscal 2023 included the following:

			Year Ended
			November 1, 2025						November 2, 2024						October 28, 2023
Expected volatility of Ciena common stock, which is a weighted average of implied volatility and historical volatility			41.89%						36.00%						40.37%
Historical volatility of Ciena common stock			39.90%						36.74%						43.11%
Volatility of S&P Networking Index(1)			47.99%						44.94%						30.93%
Correlation coefficient			0.3039						0.3665						0.7781
Expected life in years			2.87						2.89						2.89
Risk-free interest rate			4.18%						4.41%						3.95%
Expected dividend yield			0.0%						0.0%						0.0%

(1) For fiscal 2023, reflects the volatility of the S&P Networking Index as a whole. For fiscal 2024 and fiscal 2025, reflects the volatility of the median company within the S&P Networking Index as of the date of the award, measured as of the last day of the prior fiscal year.

Schedule of Restricted Stock Unit Activity

The following table is a summary of Ciena’s restricted stock unit activity for the period indicated, with the aggregate fair value of the balance outstanding at the end of each period, based on Ciena’s closing stock price on the last trading day of the relevant period (shares and aggregate fair value in thousands):

			Restricted Stock Units Outstanding						Weighted Average Grant Date Fair Value Per Share						Aggregate Fair Value
Balance at November 2, 2024			6,112						$	48.41					$	390,995
Granted			2,341
Vested			(2,578)
Canceled or forfeited			(373)
Balance at November 1, 2025			5,502						$	62.76					$	1,044,895

Schedule of Share-based Compensation Expense

The following table summarizes share-based compensation expense for the periods indicated (in thousands):

			Year Ended
			November 1, 2025						November 2, 2024						October 28, 2023
Products			$	7,774					$	6,474					$	4,518
Services			15,184						12,743						10,470
Share-based compensation expense included in cost of goods sold			22,958						19,217						14,988
Research and development			64,281						54,129						42,331
Sales and marketing			52,066						42,954						35,136
General and administrative			45,424						40,053						37,587
Share-based compensation expense included in operating expense			161,771						137,136						115,054
Share-based compensation expense capitalized in inventory, net			(204)						51						413
Total share-based compensation			$	184,525					$	156,404					$	130,455

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Tabular disclosure of share-based payment arrangement.

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-Name Accounting Standards Codification
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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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