Below are the computations of basic and diluted earnings per share for the three and nine months ended September 30, 2017 and 2016:

(In thousands, except per share amounts)	Three Months Ended September 30				Nine Months Ended September 30
	2017		2016		2017		2016
Computation of Basic Earnings per Share
Net income attributable to Stepan Company	$	21,899	$	21,362	$	81,694	$	77,774
Weighted-average number of common shares outstanding		22,971		22,819		22,941		22,771
Basic earnings per share	$	0.95	$	0.94	$	3.56	$	3.42

Computation of Diluted Earnings per Share
Net income attributable to Stepan Company	$	21,899	$	21,362	$	81,694	$	77,774
Weighted-average number of shares outstanding		22,971		22,819		22,941		22,771
Add weighted-average net shares issuable from assumed exercise of options (under treasury stock method)⁽¹⁾		147		162		167		151
Add weighted-average net shares related to unvested stock awards (under treasury stock method)		8		7		8		6
Add weighted-average net shares from assumed exercise of SARs (under treasury stock method) ⁽¹⁾		140		93		142		45
Add weighted-average contingently issuable net shares related to performance stock awards (under treasury stock method)		108		67		103		44
Weighted-average shares applicable to diluted earnings		23,374		23,148		23,361		23,017
Diluted earnings per share	$	0.94	$	0.92	$	3.50	$	3.38

⁽¹⁾

Options/SARs to acquire 24,840 shares of Company common stock were excluded from the computations of diluted earnings per share for the nine months ended September 30, 2017. Options/SARs to acquire 58,287 shares of Company common stock were excluded from the computations of diluted earnings per share for the nine months ended September 30, 2016. Inclusion of the instruments would have had antidilutive effects on the computations of earnings per share.