(6) Earnings Per Common Share (EPS)

Basic EPS and diluted EPS are calculated by dividing net income attributable to Tutor Perini Corporation by the following: for basic EPS, the weighted-average number of common shares outstanding during the period; and for diluted EPS, the sum of the weighted-average number of both outstanding common shares and potentially dilutive securities, which for the Company can include restricted stock units, unexercised stock options and the Convertible Notes, as defined in Note 8. The Company calculates the effect of these potentially dilutive securities using the treasury stock method for restricted stock units and stock options.



	Three Months Ended March 31,
(in thousands, except per common share data)	2018		2017
Net income (loss) attributable to Tutor Perini Corporation	$	(12,124)	$	13,764

Weighted-average common shares outstanding, basic		49,814		49,282
Effect of dilutive restricted stock units and stock options		—		1,666
Weighted-average common shares outstanding, diluted		49,814		50,948

Net income (loss) attributable to Tutor Perini Corporation per common share:
Basic	$	(0.24)	$	0.28
Diluted	$	(0.24)	$	0.27

Anti-dilutive securities not included above		4,507		930

All restricted stock units and stock options that were outstanding during the three months ended March 31, 2018 were excluded from weighted-average diluted shares outstanding as the shares would have an anti-dilutive effect on the net loss for the period. With regard to diluted EPS and the impact of the Convertible Notes on the diluted EPS calculation, because the Company has the intent and ability to settle the principal amount of the Convertible Notes in cash, per ASC 260, Earnings Per Share, the settlement of the principal amount has no impact on diluted EPS.