Columbia Pipeline Group, Inc. (CPGX) operates as a natural gas midstream company focused on the ownership, operation, and development of interstate natural gas pipelines and storage facilities primarily in the United States. The company provides transportation, storage, and gathering services for natural gas producers, local distribution companies, and power generators through its extensive pipeline network spanning the Appalachian Basin, Gulf Coast, and Northeast regions; key assets include the Columbia Gas Transmission system with over 11,000 miles of pipelines and approximately 60 billion cubic feet of working gas storage capacity. Founded in 2014 following the spinoff from NiSource Inc. and headquartered in Houston, Texas, it serves markets across multiple states including Pennsylvania, Ohio, Virginia, and Kentucky, with no significant subsidiaries or parent relationships currently reported. In recent developments within the last two years, the company underwent a major acquisition by TransCanada Corporation (now TC Energy) in 2016 for $13 billion, marking its integration into a larger North American energy infrastructure portfolio; more recently, it has pursued operational expansions through system upgrades and capacity enhancements to support growing Marcellus Shale production, alongside strategic maintenance projects to ensure reliability amid regulatory changes from the Federal Energy Regulatory Commission (FERC).