St. Louis-based Laclede Group Inc. will buy two of Houston-based Southern Union Co.'s utilities, Missouri Gas Energy and New England Gas Co., for $1.02 billion.
Energy Transfer Equity's takeover of pipeline operator Southern Union Co closed early this year.
The deal announced Monday also includes the assumption of about $20 million in debt, so the companies value it at nearly $1.04 billion.
Laclede, a utility holding company, expects the deal to close next summer, and start to boost earnings a year after that.
The utilities had combined revenue of about $517 million in the 12 months ending in September. The deal will double Laclede's customer base to 1.2 million.
Follow St. Louis Public Radio on Twitter: @stlpublicradio