FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Nov. 01, 2025

Schedule of the Fair Value of Assets and Liabilities Recorded on a Recurring Basis

As of the dates indicated, the following tables summarize the fair value of assets and liabilities that were recorded at fair value on a recurring basis (in thousands):


	November 1, 2025
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	713,707	$	—	$	—	$	713,707
Bond mutual fund	117,931		—		—		117,931
Time deposits	74,990		—		—		74,990
Deferred compensation plan assets	21,179		—		—		21,179
U.S. government obligations	—		147,770		—		147,770
Corporate debt securities	—		120,068		—		120,068
Foreign currency forward contracts	—		3,236		—		3,236

Total assets measured at fair value	$	927,807	$	271,074	$	—	$	1,198,881

Liabilities:
Foreign currency forward contracts	$	—	$	6,314	$	—	$	6,314
Forward starting interest rate swaps	—		1,345		—		1,345
Total liabilities measured at fair value	$	—	$	7,659	$	—	$	7,659


	November 2, 2024
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	636,097	$	—	$	—	$	636,097
Bond mutual fund	112,703		—		—		112,703
Time deposits	92,804		—		—		92,804
Deferred compensation plan assets	16,519		—		—		16,519
U.S. government obligations	—		286,181		—		286,181
Commercial paper	—		111,143		—		111,143
Foreign currency forward contracts	—		2,149		—		2,149
Interest rate swaps	—		11,777		—		11,777
Total assets measured at fair value	$	858,123	$	411,250	$	—	$	1,269,373

Liabilities:
Foreign currency forward contracts	$	—	$	9,155	$	—	$	9,155


Total liabilities measured at fair value	$	—	$	9,155	$	—	$	9,155

Schedule of Assets and Liabilities as Presented on Ciena's Consolidated Balance Sheet

As of the dates indicated, the assets and liabilities above were presented on Ciena’s Consolidated Balance Sheets as follows (in thousands):


	November 1, 2025
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	901,077	$	99	$	—	$	901,176
Short-term investments	5,551		210,597		—		216,148
Prepaid expenses and other	—		3,236		—		3,236
Long-term investments	—		57,142		—		57,142
Other long-term assets	21,179		—		—		21,179
Total assets measured at fair value	$	927,807	$	271,074	$	—	$	1,198,881

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	6,314	$	—	$	6,314

Other long-term obligations	—		1,345		—		1,345
Total liabilities measured at fair value	$	—	$	7,659	$	—	$	7,659


	November 2, 2024
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	832,239	$	9,426	$	—	$	841,665
Short-term investments	9,365		306,978		—		316,343
Prepaid expenses and other	—		2,149		—		2,149
Long-term investments	—		80,920		—		80,920
Other long-term assets	16,519		11,777		—		28,296
Total assets measured at fair value	$	858,123	$	411,250	$	—	$	1,269,373

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	9,155	$	—	$	9,155

Total liabilities measured at fair value	$	—	$	9,155	$	—	$	9,155