X0508 4 2026-02-17 0001842022 DT Midstream, Inc. DTM 0002087681 Finland Joseph Peter 500 WOODWARD AVE., SUITE 2900 DETROIT MI 48226 true Chief Accounting Officer false Common Stock 2026-02-17 4 A 0 1500 0 A 1676.45 D Common Stock 2026-02-17 4 F 0 640 132.65 D 1036.45 D Represents shares of the Issuer's common stock earned in respect of performance stock units, as certified by the Organization and Compensation Committee of the board of directors of the Issuer on February 17, 2026 based on achievement of the applicable performance conditions over the applicable performance period. /s/ Andrew Hayner, Attorney-in-Fact 2026-02-19