v3.26.1
FAIR VALUE MEASUREMENTS
 6 Months Ended
May 02, 2026
Fair Value Disclosures [Abstract]  
FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS
    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 1Level 2Level 3Total
Assets:    
Money market funds$583,123 $— $— $583,123 
Bond mutual fund120,116 — — 120,116 
Time deposits112,408 — — 112,408 
Deferred compensation plan assets25,443 — — 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 liabilities25,588 — — 25,588 
Total liabilities measured at fair value$25,588 $6,693 $— $32,281 
November 1, 2025
Level 1Level 2Level 3Total
Assets:
Money market funds$713,707 $— $— $713,707 
Bond mutual fund117,931 — — 117,931 
Time deposits74,990 — — 74,990 
Deferred compensation plan assets21,179 — — 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 
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 1Level 2Level 3Total
Assets:    
Cash equivalents$810,409 $3,393 $— $813,802 
Short-term investments5,238 152,470 — 157,708 
Prepaid expenses and other— 12,432 — 12,432 
Long-term investments— 200,106 — 200,106 
Other long-term assets25,443 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 obligations25,588 — — 25,588 
Total liabilities measured at fair value$25,588 $6,693 $— $32,281 

 November 1, 2025
 Level 1Level 2Level 3Total
Assets:    
Cash equivalents$901,077 $99 $— $901,176 
Short-term investments5,551 210,597 — 216,148 
Prepaid expenses and other— 3,236 — 3,236 
Long-term investments— 57,142 — 57,142 
Other long-term assets21,179 — — 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 

Ciena did not have any transfers between Level 1 and Level 2 fair value measurements during the periods presented.