EARNINGS PER SHARE (Tables)

6 Months Ended

Jun. 30, 2026

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The reconciliation of the numerator and denominator of basic and diluted earnings per share was as follows:


		Three months ended June 30,				Six months ended June 30,
(in millions of U.S. dollars except share and per share amounts )		2026		2025		2026		2025
Numerator:
Net income attributable to equity holders of Constellium SE		146		36		345		73
Denominator:
Basic - weighted-average ordinary shares outstanding		135,866,171		140,820,828		135,633,294		141,665,123
Dilutive effect of non-vested restricted stock units and performance-based restricted stock units		4,287,582		1,423,571		4,488,781		1,508,801
Diluted - weighted-average ordinary shares, of restricted stock units and performance-based restricted stock units		140,153,753		142,244,399		140,122,075		143,173,924
Basic earnings per share		$1.07		$0.25		$2.54		$0.51
Diluted earnings per share		$1.04		$0.25		$2.46		$0.51