Basic earnings (loss) per share attributable to TDS common shareholders is computed by dividing Net income (loss) attributable to TDS common shareholders by the weighted average number of Common Shares outstanding during the period. Diluted earnings (loss) per share attributable to TDS common shareholders is computed by dividing Net income (loss) attributable to TDS common shareholders by the weighted average number of Common Shares outstanding during the period adjusted to include the effects of potentially dilutive securities. Potentially dilutive securities primarily include incremental shares issuable upon the exercise of outstanding stock options and the vesting of performance and restricted stock units, as calculated using the treasury stock method.


	Three Months Ended March 31,
	2025		2024
(Dollars and shares in millions, except per share amounts)
Net income (loss) attributable to TDS common shareholders	$	(10)	$	12




Weighted average number of shares used in basic earnings (loss) per share:
Common Shares	108		106
Series A Common Shares	7		7
Total	115		113

Effects of dilutive securities	—		4
Weighted average number of shares used in diluted earnings (loss) per share	115		117

Basic earnings (loss) per share attributable to TDS common shareholders	$	(0.09)	$	0.11

Diluted earnings (loss) per share attributable to TDS common shareholders	$	(0.09)	$	0.10

Certain Common Shares issuable upon the exercise of stock options or vesting of performance and restricted stock units were not included in weighted average diluted shares outstanding for the calculation of Diluted earnings (loss) per share attributable to TDS common shareholders because their effects were antidilutive. The number of such Common Shares excluded was 4 million and 2 million for the three months ended March 31, 2025, and 2024, respectively.