The following is a reconciliation of basic and diluted earnings per share:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2026		2025		2026		2025
	(millions, except per share amounts)
Basic and Diluted Earnings per Common Share
Net Income Attributable to DT Midstream	$	118	$	115	$	360	$	330
Average number of common shares outstanding — basic	102.0		101.6		102.0		101.6

Incremental shares attributable to:
Average dilutive restricted stock units and performance share awards	0.7		0.9		0.7		0.9
Average number of common shares outstanding — diluted	102.7		102.5		102.7		102.5

Basic Earnings per Common Share	$	1.16	$	1.14	$	3.54	$	3.25
Diluted Earnings per Common Share	$	1.16	$	1.13	$	3.51	$	3.22