NORTHWEST NATURAL GAS CO

OVERVIEW

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.

During the first quarter of 2025, we evaluated the reportable business segments of NW Holdings and concluded that SiEnergy and NWN Water were also reportable business segments. In addition, the NGD segment was renamed to NWN Gas Utility. NW Holdings primarily operates in three reportable business segments, which are NWN Gas Utility, SiEnergy, and NWN Water. NW Natural primarily operates in one reportable business segment, which is NWN Gas Utility. NW Holdings and NW Natural also have investments and business activities not specifically related to the NWN Gas Utility, SiEnergy, and NWN Water segments, which are aggregated and reported as NW Holdings Other.

Our mission is to provide safe, reliable and affordable utility services and renewable energy in a sustainable way to better the lives of the communities we serve. We support our mission by following our core values of service ethic, integrity, safety, caring, and environmental stewardship.