Northwest Natural Holding Co

NW Holdings is a holding company headquartered in Portland, Oregon and owns NW Natural, SiEnergy Operating, LLC (SiEnergy Gas Utility or SiEnergy), NW Natural Water Company, LLC (NWN Water Utility or NWN Water), and NW Natural Renewables Holdings, LLC (NWN Renewables). NW Natural distributes natural gas to residential, commercial, and industrial customers in Oregon and southwest Washington. NW Natural and its predecessors have supplied gas service to the public since 1859, was incorporated in Oregon in 1910, and began doing business as NW Natural in 1997. Prior to the first quarter of 2025, NW Natural's natural gas distribution activities were reported in the natural gas distribution (NGD) segment. All other business activities, including certain gas storage activities, water and wastewater businesses, non-regulated renewable natural gas activities and other investments and activities are aggregated and reported as "other" at their respective registrant. SiEnergy owns and operates SiEnergy Holdings, which includes SiEnergy Gas and Terra Transmission, a gas distribution and a transmission utility, respectively, and provides gas distribution and transmission to customers in Texas. NWN Water provides regulated water and wastewater services and unregulated wastewater and operations services to customers in Oregon, Washington, Idaho, Arizona, and Texas. NWN Renewables is a non-regulated business established to pursue non-regulated renewable natural gas activities.