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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - Q × QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period ended June 30 , 2021 Or □ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Delaware DT Midstream Commission File Number : 1-40392 DT Midstream , Inc. ( State or other jurisdiction of incorporation or organization ) 38-2663964 ( I.R.S Employer Identification No. ) Registrant's address of principal executive offices : One Energy Plaza , Detroit , Michigan 48226-1279 Registrant's telephone number , including area code : ( 313 ) 402-8532 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) Title of Each Class Common stock , par value $ 0.01 DTM Name of Exchange on which Registered New York Stock Exchange Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes ✓ No □ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes - No □ Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer П Accelerated filer ☐ Non - accelerated filer Smaller reporting company Emerging growth company ☑ ☐ □ If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes □ No ☑ Number of shares of common stock outstanding at June 30 , 2021 : Description Common stock , par value $ 0.01 Shares 96,732,466