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 unless the impact of the item is 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
	May 2,		May 3,		May 2,		May 3,
	2026		2025		2026		2025
Net income	$	218,220	$	8,969	$	368,503	$	53,541
Basic weighted average shares outstanding	141,949		142,503		141,834		142,704
Effect of dilutive potential common shares	4,365		2,469		4,244		2,766
Diluted weighted average shares outstanding	146,314		144,972		146,078		145,470
Basic EPS	$	1.54	$	0.06	$	2.60	$	0.38
Diluted EPS	$	1.49	$	0.06	$	2.52	$	0.37
Anti-dilutive stock unit awards, excluded	1		1,630		12		1,310