The following table sets forth the computation of basic and diluted earnings (loss) per share:

In millions, except per share data
	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Numerator:
Net income (loss) attributable to Stericycle, Inc.	$	23.5		$	39.0		$	73.7		$	(46.8	)
Mandatory convertible preferred stock dividend		(8.4	)		(8.9	)		(25.5	)		(27.5	)
Gain on repurchases of preferred stock		2.4			5.4			16.9			14.4
Numerator for basic earnings (loss) per share attributable to Stericycle, Inc. common shareholders	$	17.5		$	35.5		$	65.1		$	(59.9	)
Denominator:
Denominator for basic earnings (loss) per share - weighted average shares ⁽¹⁾		86.7			85.3			85.9			85.3
Effect of dilutive securities:
Stock-based compensation awards		0.1			0.3			0.2			-
Mandatory convertible preferred stock ⁽²⁾		-			-			-			-
Denominator for diluted earnings (loss) per share - adjusted weighted average shares and after assumed exercises		86.8			85.6			86.1			85.3
Earnings (loss) per share – Basic	$	0.20		$	0.42		$	0.76		$	(0.70	)
Earnings (loss) per share – Diluted ⁽³⁾	$	0.20		$	0.41		$	0.76		$	(0.70	)

⁽¹⁾

For the three and nine months ended September 30, 2018, respectively, the denominator for basic earnings per share includes 0.8 million and 0.3 million shares, respectively, representing the weighted-average impact of the common shares outstanding subsequent to the Series A conversion on September 14, 2018.

⁽²⁾

The weighted average common shares (in thousands) issuable upon the assumed conversion (as discussed above) of the Series A totaling 3,918 and 5,049 for the three months ended September 30, 2018 and 2017, respectively, and 4,526 and 5,152 for the nine months ended September 30, 2018 and 2017, respectively, were excluded from the computation of diluted earnings (loss) per share as such conversion would have been anti-dilutive.

⁽³⁾

Due to the net loss for the nine months ended September 30, 2017, dilutive loss per share is the same as basic.