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EARNINGS PER SHARE CALCULATION
 9 Months Ended
Aug. 02, 2025
Earnings Per Share [Abstract]  
EARNINGS PER SHARE CALCULATION EARNINGS PER SHARE CALCULATION
Basic net income per common share (“Basic EPS”) is computed using the weighted average number of common shares outstanding. Diluted net income per potential common share (“Diluted EPS”) is computed using the weighted average number of the following, in each case, to the extent that the effect is not anti-dilutive: (i) common shares outstanding; (ii) shares issuable upon vesting of stock unit awards; and (iii) shares issuable under Ciena’s employee stock purchase plan, using the treasury stock method.
The following table presents the calculation of Basic EPS and Diluted EPS for the periods indicated (in thousands, except per share amounts):
Quarter EndedNine Months Ended
 August 2,July 27,August 2,July 27,
2025202420252024
Net income$50,308 $14,230 $103,849 $46,928 
Basic weighted average shares outstanding141,846 144,394 142,437 144,876 
Effect of dilutive potential common shares2,653 967 2,721 919 
Diluted weighted average shares144,499 145,361 145,158 145,795 
Basic EPS$0.35 $0.10 $0.73 $0.32 
Diluted EPS$0.35 $0.10 $0.72 $0.32 
Antidilutive employee share-based awards, excluded1,371 690 1,330 1,286