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Business, Product and Geographical Area Information (Tables)

9 Months Ended

Sep. 30, 2025

Segment Reporting [Abstract]

Schedule of Significant Segment Expenses Provided to CODM

The following table presents the significant segment expenses that are provided to the CODM (in millions of dollars):

		Quarter Ended September 30,								Nine Months Ended September 30,
		2025				2024 As Adjusted1				2025				2024 As Adjusted1
Net sales		$	843.5			$	747.7			$	2,444.0			$	2,258.6
Less:
Cost of products sold, excluding depreciation and amortization
Hedged cost of alloyed metal2			492.8				385.7				1,355.9				1,160.8
Manufacturing costs3			158.8				208.2				532.5				599.1
Plant overhead4			45.9				45.0				136.0				133.5
Freight costs			21.6				23.4				63.6				69.1
Other cost of products sold5			9.7				13.7				37.0				34.6
Depreciation and amortization			32.0				29.0				91.6				86.8
Selling, general, administrative, research and development
Research and development costs			0.4				0.5				1.0				1.7
Employee costs6			24.7				20.2				69.9				63.8
Other selling, general and administrative costs7			8.8				8.1				26.4				27.5
Restructuring costs			—				0.7				1.9				7.6
Other operating charges, net			—				—				—				0.4
Interest expense			12.4				10.7				36.1				33.3
Other income, net – Note 9			(11.4	)			(8.7	)			(14.4	)			(19.1	)
Income tax provision			8.3				2.4				22.2				13.6
Net income		$	39.5			$	8.8			$	84.3			$	45.9

1.Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 14 for further discussion.

2.Hedged cost of alloyed metal includes cost of aluminum at the MWTP and the cost of alloying elements used in the production process. For the quarters ended September 30, 2025 and September 30, 2024, this metric also includes metal price exposure on shipments that we hedged with realized gains (losses) upon settlement of $10.2 million and ($2.1) million, respectively. For the nine months ended September 30, 2025 and September 30, 2024, this metric also includes metal price exposure on shipments that we hedged with realized gains (losses) upon settlement of $15.4 million and ($2.2) million, respectively.

3.Manufacturing costs primarily includes labor, utilities, supplies, metal valuation impacts, metal profits, and other materials, excluding alloys incurred at our various production facilities.

4.Plant overhead includes salaried employee costs, property taxes, and insurance associated with our various production facilities.

5.Other cost of products sold primarily includes lease expense, accretion expense related to conditional asset retirement obligations, gains and losses on operating asset disposals, and major maintenance costs.

6.Employee costs include non direct labor salaries, benefits, and incentive compensation.

7.Other selling, general and administrative costs primarily include professional services, computer hardware and software costs, office rent, and utilities.

Schedule of Net Sales by End Market Segment Applications

The following table presents Net sales by end market applications and by timing of control transfer (in millions of dollars):

		Quarter Ended September 30,								Nine Months Ended September 30,
		2025				2024				2025				2024
Net sales:
Aero/HS Products		$	182.2			$	213.1			$	624.8			$	659.7
Packaging			393.9				319.5				1,049.0				930.0
GE Products			192.2				150.7				559.2				466.3
Automotive Extrusions			75.2				62.1				211.0				195.3
Other products			—				2.3				—				7.3
Total net sales		$	843.5			$	747.7			$	2,444.0			$	2,258.6
Timing of revenue recognition:
Products transferred at a point in time		$	670.7			$	580.2			$	1,888.1			$	1,741.4
Products transferred over time			172.8				167.5				555.9				517.2
Total net sales		$	843.5			$	747.7			$	2,444.0			$	2,258.6

Schedule of Income Taxes Paid by Geographical Area

The following table presents geographic information for income taxes paid (in millions of dollars):

		Quarter Ended September 30,								Nine Months Ended September 30,
		2025				2024				2025				2024
Income taxes paid:
Domestic		$	—			$	0.2			$	2.6			$	0.4
Foreign			0.9				0.3				3.6				2.5
Total income taxes paid		$	0.9			$	0.5			$	6.2			$	2.9

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