EX-21.1 5 a12312024ex211.htm EX-21.1 Document
Exhibit 21.1

SUBSIDIARIES OF DT MIDSTREAM, INC.
DT Midstream’s principal subsidiaries as of December 31, 2024 are listed below. All other subsidiaries, if considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary.
SubsidiaryState of Incorporation
1Bluestone Pipeline Company of Pennsylvania, LLCPennsylvania
2DTM Appalachia Gathering, LLCDelaware
3DTM LEAP Gas Gathering, LLCDelaware
4DTM Louisiana Gathering, LLCDelaware
5DTM Millennium CompanyMichigan
6DTM Nexus, LLCDelaware
7DTM Vector CompanyMichigan
8Guardian Pipeline, LLCDelaware
9Midwestern Gas Transmission CompanyDelaware
10Stonewall Gas Gathering LLCDelaware
11Stonewall Gas Holdings, LLCDelaware
12Susquehanna Gathering Company I, LLCPennsylvania
13Viking Gas Transmission CompanyDelaware