FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

May 02, 2026

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

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


	May 2, 2026
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	583,123	$	—	$	—	$	583,123
Bond mutual fund	120,116		—		—		120,116
Time deposits	112,408		—		—		112,408
Deferred compensation plan assets	25,443		—		—		25,443
U.S. government obligations	—		208,878		—		208,878
Corporate debt securities	—		147,091		—		147,091
Foreign currency forward contracts	—		12,432		—		12,432
Interest rate swaps	—		4,240		—		4,240

Total assets measured at fair value	$	841,090	$	372,641	$	—	$	1,213,731

Liabilities:
Foreign currency forward contracts	$	—	$	6,693	$	—	$	6,693

Deferred compensation plan liabilities	25,588		—		—		25,588
Total liabilities measured at fair value	$	25,588	$	6,693	$	—	$	32,281


	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

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

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


	May 2, 2026
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	810,409	$	3,393	$	—	$	813,802
Short-term investments	5,238		152,470		—		157,708
Prepaid expenses and other	—		12,432		—		12,432
Long-term investments	—		200,106		—		200,106
Other long-term assets	25,443		4,240		—		29,683
Total assets measured at fair value	$	841,090	$	372,641	$	—	$	1,213,731

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	6,693	$	—	$	6,693
Other long-term obligations	25,588		—		—		25,588
Total liabilities measured at fair value	$	25,588	$	6,693	$	—	$	32,281


	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