Earnings (Loss) per Share

12 Months Ended

Dec. 31, 2021

The Company computes basic earnings (loss) per share by dividing income available to common shareholders by the weighted average number of common shares outstanding. The computation of diluted earnings (loss) per share is similar to the computation of basic earnings (loss) per share, except that the Company adjusts the weighted average number of shares outstanding to include estimates of additional shares that would be issued if potentially dilutive common shares had been issued. In addition, the Company adjusts income (loss) available to common shareholders to include any changes in income or loss that would result from the assumed issuance of the dilutive common shares.

Earnings (loss) per share of common stock outstanding were computed as follows:


	Year Ended December 31
	2021		2020		2019

Net income (loss) attributable to Tenneco Inc.	$	35	$	(1,521)	$	(334)
Basic earnings (loss) per share —
Average shares of common stock outstanding	82,218,480		81,378,474		80,904,060
Earnings (loss) per average share of common stock	$	0.43	$	(18.69)	$	(4.12)
Diluted earnings (loss) per share —
Average shares of common stock outstanding	82,218,480		81,378,474		80,904,060
Effect of dilutive securities:
Restricted stock, RSUs and PSUs	1,381,547		—		—

Average shares of common stock outstanding including dilutive securities	83,600,027		81,378,474		80,904,060
Earnings (loss) per average share of common stock	$	0.42	$	(18.69)	$	(4.12)

Weighted average number of antidilutive stock-based awards excluded from the calculation of diluted earnings per share	1,787,410		2,346,904		1,868,274