X0206 3 2025-09-17 0 0001842022 DT Midstream, Inc. DTM 0002087681 Finland Joseph Peter 500 WOODWARD AVE., SUITE 2900 DETROIT MI 48226 true Chief Accounting Officer Restricted Stock Units Common Stock 316.8922 D Restricted Stock Units Common Stock 2036.6646 D Restricted Stock Units Common Stock 336.63 D Restricted Stock Units Common Stock 179.9373 D Restricted Stock Units Common Stock 772.6125 D Restricted stock units vest on February 1, 2026, subject to the Reporting Person's continued employment with the Issuer through the vesting date. Includes associated dividend equivalents under the Issuer's long-term incentive plan. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock with any fractional shares being paid in cash. Restricted stock units of which 965 vest on March 1, 2026 and 965 vest on March 1, 2027, together with associated dividend equivalents, subject to the Reporting Person's continued employment with the Issuer through the applicable vesting dates. Restricted stock units vest on February 15, 2027, subject to the Reporting Person's continued employment with the Issuer through the vesting date. Restricted stock units vest on February 25, 2028, subject to the Reporting Person's continued employment with the Issuer through the vesting date. Restricted stock units vest on March 1, 2028, subject to the Reporting Person's continued employment with the Issuer through the vesting date. Exhibit 24 (Power of Attorney) /s/ Andrew Hayner, Attorney-in-Fact 2025-09-23