Utility company files to spin off midstream businesses into standalone company

NiSource Inc. (NYSE: NI) took another step in the spinoff of its natural gas pipeline and related businesses into a standalone public company the same day that its Houston-based master-limited partnership started trading on the New York Stock Exchange.

Indiana-based NiSource previously announced the plan to spin off Columbia Pipeline Group, which will include Columbia Pipeline Partners LP (NYSE: CPPL), Columbia Gas Transmission, Columbia Gulf Transmission, Columbia Midstream Group (formerly NiSource…