Earnings Per Common Share

Basic net income attributable to Trinity Industries, Inc. per common share is computed by dividing net income attributable to Trinity remaining after allocation to unvested restricted shares by the weighted average number of basic common shares outstanding for the period. Except when the effect would be antidilutive, the calculation of diluted net income attributable to Trinity per common share includes 1) the net impact of unvested restricted shares and shares that could be issued under outstanding stock options and 2) the incremental shares calculated by dividing the value of the conversion obligation in excess of the Convertible Subordinated Notes' aggregate principal amount by the average price of the Company's common stock during the period. See Note 11 Debt for further explanation of the Company's Convertible Subordinated Notes. Total weighted average restricted shares and antidilutive stock options were 6.4 million shares, 6.6 million shares, and 6.8 million shares, for the years ended December 31, 2017, 2016, and 2015, respectively.

The computation of basic and diluted net income attributable to Trinity Industries, Inc. follows.



	Year Ended December 31, 2017
	(in millions, except per share amounts)
	Income (Loss)			Average Shares	EPS
Net income attributable to Trinity Industries, Inc.	$	702.5
Unvested restricted share participation	(15.4		)
Net income attributable to Trinity Industries, Inc. – basic	687.1			148.6	$	4.62
Effect of dilutive securities:
Nonparticipating unvested restricted shares and stock options	—			0.5
Convertible subordinated notes	0.3			2.9
Net income attributable to Trinity Industries, Inc. – diluted	$	687.4		152.0	$	4.52



	Year Ended December 31, 2016
	(in millions, except per share amounts)
	Income (Loss)			Average Shares	EPS
Net income attributable to Trinity Industries, Inc.	$	343.6
Unvested restricted share participation	(9.4		)
Net income attributable to Trinity Industries, Inc. – basic	334.2			148.4	$	2.25
Effect of dilutive securities:
Nonparticipating unvested restricted shares and stock options	—			—
Convertible subordinated notes	—			0.2
Net income attributable to Trinity Industries, Inc. – diluted	$	334.2		148.6	$	2.25



	Year Ended December 31, 2015
	(in millions, except per share amounts)
	Income (Loss)			Average Shares	EPS
Net income attributable to Trinity Industries, Inc.	$	796.5
Unvested restricted share participation	(24.1		)
Net income attributable to Trinity Industries, Inc. – basic	772.4			150.2	$	5.14
Effect of dilutive securities:
Nonparticipating unvested restricted shares and stock options	—			—
Convertible subordinated notes	0.3			2.0
Net income attributable to Trinity Industries, Inc. – diluted	$	772.7		152.2	$	5.08