Per Share Information (Tables)

6 Months Ended

Jun. 30, 2023

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


(In millions, except per share amounts)	Three months ended June 30,				Six months ended June 30,
	2023		2022		2023		2022
Numerator:
Numerator for basic income (loss) per common share –
Net income (loss) attributable to ATI	$	76.0	$	(38.0)	$	146.1	$	(7.1)
Effect of dilutive securities:
3.5% Convertible Senior Notes due 2025	2.6		—		5.2		—
Numerator for diluted net income (loss) per common share –
Net income (loss) attributable to ATI after assumed conversions	$	78.6	$	(38.0)	$	151.3	$	(7.1)
Denominator:
Denominator for basic net income (loss) per common share – weighted average shares	128.5		124.6		128.5		125.5
Effect of dilutive securities:
Share-based compensation	2.8		—		2.8		—
3.5% Convertible Senior Notes due 2025	18.8		—		18.8		—
Denominator for diluted net income (loss) per common share – adjusted weighted average shares and assumed conversions	150.1		124.6		150.1		125.5
Basic net income (loss) attributable to ATI per common share	$	0.59	$	(0.31)	$	1.14	$	(0.06)
Diluted net income (loss) attributable to ATI per common share	$	0.52	$	(0.31)	$	1.01	$	(0.06)