NW Natural Holdings, an Oregon-based company including regulated natural gas distribution companies (NW Natural and SiEnergy), water and wastewater utilities (NW Natural Water), a renewable fuels business (NW Natural Renewables) and other business interests, earned recognition as one of the 2025 World’s Most Ethical Companies® by Ethisphere, a global leader in defining and advancing the standards of ethical business practices.

For the fourth consecutive year NW Natural Holdings has been named a World's Most Ethical Companies® honoree and is one of only seven honorees in the Energy & Utilities category.

“This award is the result of our dedication to integrity in our business operations and our unwavering commitment to the customers and communities we serve,” said David H. Anderson, CEO of NW Natural Holdings. “Our employees live our core values every day, and we are very proud to be named as one of the World’s Most Ethical Companies for a fourth straight year.”

The World's Most Ethical Companies assessment is grounded in Ethisphere's proprietary Ethics Quotient®, which requires companies to provide 240+ different proof points on practices that support robust ethics and compliance; governance; a culture of ethics; environmental and social impact; and initiatives that support a strong value chain.

“Congratulations to NW Natural Holdings for achieving recognition as one of the World’s Most Ethical Companies®. Behind this honor is a true dedication and a commitment to advancing business integrity. This approach is good for business – employees and other stakeholders value companies that prioritize the kinds of practices we measure with our process,” said Erica Salmon Byrne, Ethisphere’s Chief Strategy Officer and Executive Chair.

Honorees

This year’s list includes 136 honorees across 19 countries and 44 industries. To view the full list of honorees, please visit the World’s Most Ethical Companies website, at https://worldsmostethicalcompanies.com/honorees.

About NW Natural Holdings

Northwest Natural Holding Company (NYSE: NWN) (NW Natural Holdings) is headquartered in Portland, Oregon and has been doing business for over 165 years. It owns Northwest Natural Gas Company (NW Natural), SiEnergy Operating (SiEnergy), NW Natural Water Company (NW Natural Water), NW Natural Renewables Holdings (NW Natural Renewables), and other business interests.

NW Natural Holdings provides critical energy and delivers essential water and wastewater services to nearly one million customers across seven states. We have a longstanding commitment to safety, environmental stewardship, and the energy transition, and taking care of our employees and communities. NW Natural Holdings was recognized by Ethisphere® for four years running as one of the World’s Most Ethical Companies®. NW Natural consistently leads the industry with high J.D. Power & Associates customer satisfaction scores. Learn more in our latest Community and Sustainability Report at ir.nwnaturalholdings.com/sustainability.

NW Natural is a local distribution company that currently provides natural gas service to approximately 2 million people in more than 140 communities through approximately 806,000 meters in Oregon and Southwest Washington with one of the most modern pipeline systems in the nation. NW Natural owns and operates 21.6 Bcf of underground gas storage capacity in Oregon.

SiEnergy is one of the fastest growing natural gas distribution utilities in the nation, serving approximately 70,000 customers in the greater metropolitan areas of Houston, Dallas, and Austin, Texas.

NW Natural Water provides water distribution and wastewater services to communities throughout the Pacific Northwest, Texas, Arizona, and California. Today NW Natural Water serves an estimated 190,000 people through approximately 76,000 meters and provides operation and maintenance services to an additional 25,000 connections. Learn more about our water business at nwnaturalwater.com.

NW Natural Renewables is committed to leading in the energy transition by providing renewable fuels. Learn more at nwnaturalrenewables.com.

Additional information is available at nwnaturalholdings.com.

“World’s Most Ethical Companies” and “Ethisphere” names and marks are registered trademarks of Ethisphere LLC

About Ethisphere

Ethisphere is the global leader in defining and advancing the standards of ethical business practices that strengthen corporate brands, build trust in the marketplace, and deliver business success. Companies turn ethics, compliance, and culture into a business advantage by leveraging Ethisphere’s data-driven program and culture assessments featuring the latest guidance and the practices of hundreds of global organizations across the 8 pillars of an ethical culture, and 240+ ethics, compliance, social, and governance data points delivered through a proprietary software platform. Ethisphere also honors superior integrity programs through World’s Most Ethical Companies® recognition, brings together a community of industry experts with the Business Ethics Leadership Alliance (BELA), and advances ethical business practices through the Global Ethics Summit, Ethisphere Magazine and the Ethicast podcast. For more information, visit https://ethisphere.com.

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