EARNINGS (LOSS) PER SHARE CALCULATION

6 Months Ended

Apr. 27, 2024

Basic net income (loss) per common share (“Basic EPS”) is computed using the weighted average number of common shares outstanding. Diluted net income (loss) 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 and upon exercise of outstanding stock options, using the treasury stock method.

The following table presents the calculation of Basic and Diluted EPS for the periods indicated (in thousands, except per share amounts):


	Quarter Ended				Six Months Ended
	April 27,		April 29,		April 27,		April 29,
	2024		2023		2024		2023
Net income (loss)	$	(16,849)	$	57,654	$	32,698	$	133,895
Basic weighted average shares outstanding	144,914		149,616		145,104		149,351
Effect of dilutive potential common shares	—		531		955		501
Diluted weighted average shares	144,914		150,147		146,059		149,852
Basic EPS	$	(0.12)	$	0.39	$	0.23	$	0.90
Diluted EPS	$	(0.12)	$	0.38	$	0.22	$	0.89
Antidilutive employee share-based awards, excluded	2,030		1,550		1,584		2,159