Net Income (Loss) Per Share Attributable to Gilead Common Stockholders

9 Months Ended

Sep. 30, 2019

Net Income (Loss) Per Share Attributable to Gilead Common Stockholders

NET INCOME (LOSS) PER SHARE ATTRIBUTABLE TO GILEAD COMMON STOCKHOLDERS

Basic net income (loss) per share attributable to Gilead common stockholders is calculated based on the weighted-average number of shares of our common stock outstanding during the period. Diluted net income per share attributable to Gilead common stockholders is calculated based on the weighted-average number of shares of our common stock and other dilutive securities outstanding during the period. The potentially dilutive shares of our common stock resulting from the assumed exercise of outstanding stock options and equivalents were determined under the treasury stock method.

Potential shares of common stock excluded from the computation of diluted net income (loss) per share attributable to Gilead common shareholders because their effect would have been antidilutive were 40 million and 14 million for the three and nine months ended September 30, 2019, respectively, and 12 million and 13 million for the three and nine months ended September 30, 2018, respectively.

The following table summarizes the calculation of basic and diluted net income (loss) per share attributable to Gilead common stockholders (in millions, except per share amounts):



	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2019			2018		2019		2018
Net income (loss) attributable to Gilead	$	(1,165	)	$	2,097	$	2,690	$	5,452
Shares used in per share calculation - basic	1,267			1,296		1,271		1,302
Dilutive effect of stock options and equivalents	—			11		7		11
Shares used in per share calculation - diluted	1,267			1,307		1,278		1,313

Net income (loss) per share attributable to Gilead common stockholders - basic	$	(0.92	)	$	1.62	$	2.12	$	4.19
Net income (loss) per share attributable to Gilead common stockholders - diluted	$	(0.92	)	$	1.60	$	2.10	$	4.15