v3.26.1
FAIR VALUE MEASUREMENTS
 9 Months Ended
Aug. 01, 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):
August 1, 2026
Level 1Level 2Level 3Total
Assets:
Money market funds$1,877,098 $— $— $1,877,098 
Bond mutual fund121,272 — — 121,272 
Time deposits93,087 — — 93,087 
Deferred compensation plan assets27,357 — — 27,357 
U.S. government obligations— 183,834 — 183,834 
Corporate debt securities— 222,417 — 222,417 
Foreign currency forward contracts— 4,322 — 4,322 
Total assets measured at fair value$2,118,814 $410,573 $— $2,529,387 
Liabilities:
Foreign currency forward contracts$— $11,003 $— $11,003 
Total liabilities measured at fair value$— $11,003 $— $11,003 
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):
August 1, 2026
Level 1Level 2Level 3Total
Assets:
Cash equivalents$2,087,490 $12,372 $— $2,099,862 
Short-term investments3,967 180,326 — 184,293 
Prepaid expenses and other— 4,322 — 4,322 
Long-term investments— 213,553 — 213,553 
Other long-term assets27,357 — — 27,357 
Total assets measured at fair value$2,118,814 $410,573 $— $2,529,387 
Liabilities:
Accrued liabilities and other short-term obligations$— $11,003 $— $11,003 
Total liabilities measured at fair value$— $11,003 $— $11,003 

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.