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 Missouri Public Service Commission will take Laclede Gas Co. to court in a dispute over records of gas purchases made by one of the utility's affiliates.
The commission's staff has been trying for three years to obtain information on gas transactions made by Laclede Energy Resources, a gas marketing company not regulated by the state.
St. Louis Public Radio is a service of the University of Missouri-St. Louis.