The computation of basic earnings per share ("EPS") is based on the weighted-average number of our common shares outstanding. The computation of diluted EPS is based on the weighted-average number of our common shares outstanding and dilutive potential common shares, which primarily include shares that may be issued under our stock option, restricted stock and performance unit award programs (collectively, dilutive securities), as determined by using the treasury stock method.

The computations for basic and diluted EPS were as follows (in millions, except per-share data):


	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
Net income (loss) (Numerator):
Net income (loss)	$	—	$	(93)	$	(112)	$	(97)

Weighted-average shares (Denominator):
Outstanding	106.1		91.1		102.3		88.6
Effect of dilutive securities	0.4		—		—		—
Weighted-average shares for diluted EPS	106.5		91.1		102.3		88.6

Net income (loss) per share - Basic	$	—	$	(1.02)	$	(1.09)	$	(1.09)
Net income (loss) per share - Diluted	$	—	$	(1.02)	$	(1.09)	$	(1.09)

The following table summarizes potentially dilutive securities excluded from the computation of diluted net loss per share calculations because they would have been antidilutive (in millions):


	Three Months Ended June 30,		Six Months Ended June 30,
	2025	2024	2025	2024
Common stock options issued and outstanding	17.0	15.6	17.7	15.6
Restricted stock units issued	3.9	3.0	4.0	3.0
Employee stock purchase plan shares	0.2	0.2	0.2	0.2
Total potential dilutive securities	21.1	18.8	21.9	18.8

We have also excluded the effect of Gilead’s right to purchase additional shares of our common stock which expired in July 2025, from the calculation as these rights had no intrinsic value at either June 30, 2025 or 2024.