Exhibit 21
SIGNIFICANT SUBSIDIARIES OF CENTERPOINT ENERGY, INC.
The following subsidiaries are deemed “significant subsidiaries” pursuant to Item 601(b) (21) of Regulation S-K:
Utility Holding, LLC, a Delaware limited liability company and a direct wholly-owned subsidiary of CenterPoint Energy, Inc.
CenterPoint Energy Midstream, Inc., a Delaware corporation and a wholly-owned subsidiary of CenterPoint Energy, Inc.
CenterPoint Energy Houston Electric, LLC, a Texas limited liability company and an indirect wholly-owned subsidiary of CenterPoint Energy, Inc.
CenterPoint Energy Resources Corp., a Delaware corporation and an indirect wholly-owned subsidiary of CenterPoint Energy, Inc.
CenterPoint Energy Services, Inc., a Delaware corporation and a wholly-owned subsidiary of CenterPoint Energy Resources Corp.
CenterPoint Energy Investment Management, Inc., a Delaware corporation and an indirect wholly-owned subsidiary of CenterPoint Energy, Inc.
Vectren Corporation, an Indiana corporation and a wholly-owned subsidiary of CenterPoint Energy, Inc.
Vectren Utility Holdings, Inc., an Indiana corporation and a wholly-owned subsidiary of Vectren Corporation
Southern Indiana Gas and Electric Company, an Indiana corporation and a wholly-owned subsidiary of Vectren Utility Holdings, Inc. (doing business as Vectren Energy Delivery of Indiana, Inc.)
Indiana Gas Company, Inc., an Indiana corporation and a wholly-owned subsidiary of Vectren Utility Holdings, Inc. (doing business as Vectren Energy Delivery of Indiana, Inc.)
Vectren Energy Delivery of Ohio, Inc., an Ohio corporation and a wholly-owned subsidiary of Vectren Utility Holdings, Inc.
Vectren Enterprises, Inc., an Indiana corporation and a wholly-owned subsidiary of Vectren Corporation
Vectren Utility Services, Inc., an Indiana corporation and a wholly-owned subsidiary of Vectren Enterprises, Inc.
Vectren Infrastructure Services Corporation, an Indiana corporation and a wholly-owned subsidiary of Vectren Utility Services, Inc.
Miller Pipeline, LLC, an Indiana corporation and wholly-owned subsidiary of Vectren Infrastructure Services Corporation
Minnesota Limited, LLC, a Minnesota corporation and wholly-owned subsidiary of Vectren Infrastructure Services Corporation
(1) Pursuant to Item 601(b) (21) of Regulation S-K, registrant has omitted the names of subsidiaries, which considered in the aggregate as a single subsidiary, would not constitute a “significant subsidiary” (as defined under Rule 1-02(w) of Regulation S-X) as of December 31, 2019.