Basic net income (loss) per common share attributable to Altice USA stockholders is computed by dividing net income attributable to Altice USA stockholders by the weighted average number of common shares outstanding during the period. Diluted income per common share attributable to Altice USA stockholders reflects the dilutive effects of stock options, restricted stock, restricted stock units, and deferred cash-denominated awards. For awards that are performance based, the dilutive effect is reflected upon the achievement of the performance criteria. Diluted net loss per common share attributable to Altice USA stockholders excludes the effects of common stock equivalents as they are anti-dilutive.

The following table presents a reconciliation of weighted average shares used in the calculations of the basic and diluted net income per share attributable to Altice USA stockholders:

Three Months Ended March 31, 2023

(in thousands)

Basic weighted average shares outstanding

454,686

Effect of dilution:

Restricted stock

245

Deferred cash-denominated awards (Note 13)

663

Diluted weighted average shares outstanding

455,594

Weighted average shares excluded from diluted weighted average shares outstanding:

Anti-dilutive shares

50,539

Share-based compensation awards whose performance metrics have not been achieved

6,921

Net income per membership unit for CSC Holdings is not presented since CSC Holdings is a limited liability company and a wholly-owned subsidiary of Altice USA.