Knife River Corporation Publishes 2023 Sustainability Report

Knife River Corporation (NYSE: KNF) today announced that it has published its first sustainability report as a stand-alone company. The report highlights the commitments Knife River has made to sustainable business practices.

“At Knife River, our core values of People, Safety, Quality and the Environment guide our sustainability efforts,” said Brian Gray, Knife River President and CEO. “Our sustainability report showcases how each of these values drives our decision-making. We strive to be a People-first company that takes care of our team and our customers. We prioritize Safety through training, communication and a positive culture. We believe the Quality of our team, our work and our structure provides a business advantage. And we are committed to meeting or exceeding Environmental standards, while championing recycling, reclamation and fuel reduction. Combined, our efforts reflect our ongoing commitment to sound business practices as we continue on our path toward a sustainable future.”

In its reporting, Knife River utilized the Construction Materials framework established by the Sustainability Accounting Standards Board (SASB). The company also is continuing to document its climate-related risks and opportunities through frameworks relevant to its business and stakeholders, including those suggested by the Task Force on Climate-related Financial Disclosures (TCFD).

“In a year of firsts for us as a new publicly traded company, we are excited to share our story and our ‘Life at Knife’ philosophy,” Gray said. “As we make progress toward our sustainability goals, we will continue to share that information.”

The 2023 Knife River Sustainability Report can be found at www.kniferiver.com.

About Knife River

Knife River Corporation, a member of the S&P MidCap 400 index, mines aggregates and markets crushed stone, sand, gravel and related construction materials, including ready-mix concrete, asphalt and other value-added products. It also distributes cement and asphalt oil. It performs integrated contracting services. For more information about Knife River, visit www.kniferiver.com.

Forward-Looking Statement

The information in this release includes certain forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended. The forward-looking statements contained in this release, including, but not limited to, statements about Knife River’s commitment to certain business practices, are expressed in good faith and are believed by Knife River to have a reasonable basis. Nonetheless, actual results may differ materially from the projected results expressed in the forward-looking statements. There can be no assurance that the actual results or developments anticipated by Knife River will be realized or, even if substantially realized, that they will have the expected consequences to or effects on Knife River or its business or operations. For a discussion of important factors that could cause actual results to differ materially from those expressed in the forward-looking statements, refer to Item 1A-Risk Factors in Knife River’s Form 10-K. All forward-looking statements in this release are expressly qualified by such cautionary statements and by reference to the underlying assumptions. Undue reliance should not be placed on forward-looking statements, which speak only as of the date they are made. Except as required by law, Knife River does not undertake to update forward-looking statements, whether as a result of new information, future events or otherwise.

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Media Contact: Tony Spilde, Knife River senior director of communications, 541-693-5949

Investor Contact: Zane Karimi, Knife River director of investor relations, 503-944-3508