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 and upon exercise of outstanding stock options, using the treasury stock method.


	Quarter Ended				Nine Months Ended
	July 30		July 31		July 30		July 31
	2022		2021		2022		2021
Net income	$	10,512	$	238,232	$	95,257	$	396,697
Basic weighted average shares outstanding	149,862		155,271		152,083		155,277
Effect of dilutive potential common shares	601		1,473		1,126		1,465
Diluted weighted average shares	150,463		156,744		153,209		156,742
Basic EPS	$	0.07	$	1.53	$	0.63	$	2.55
Diluted EPS	$	0.07	$	1.52	$	0.62	$	2.53
Antidilutive employee share-based awards, excluded	1,640		131		1,264		99