Knife River Corporation (KNF)

Aggregates, concrete, asphalt and paving, all U.S. Read October 20, 2026 from the annual report for the period ending December 31, 2025, filed February 20, 2026. Ranked 51 of the 62 Basic Materials companies read so far, by the share within reach now.

The filing states 5,298 employees, all in the United States, with a seasonal peak of 6,900, in aggregates, ready-mix, asphalt and contracting with nothing by segment, so the split is by description.

The figures on this page come from the company's own annual report and from BLS staffing patterns for its industries, never from a roster. They are estimates with a stated method. Nothing here says what the company will do: within reach is not a forecast of jobs lost or of savings.

What follows from the reading

Share of working time within reach of AI, on the long-run pace at four in five: 16% now, 22% at the end of 2027, 24% at the end of 2028, 24% at the end of 2030. By the patterns, the work is about 24% desk work, 11% people work and 65% body work. These are the site's industry estimates weighted by the shares below: estimates with a stated method and range, not a forecast of what the company will do. By the same patterns, at the end of 2028 about 72% of the working time stays with people (conversation, in-person and hands-on work), 21% becomes checking a model's work and 5% could be handed over with lighter checks, from the industries' own figures, not the company's roles.

Headcount

5,298 employees as of December 31, 2025 (stated). The filing states that all employees are employed in the United States.

The filing: “As of December 31, 2025, we employed 5,298 people, all of whom were employed in the United States.”

The workforce as industry patterns

What the filing says about the workforce: Year-end 5,298, all in the United States; at the peak of the 2025 construction season nearly 6,900; the year-end count is the headcount with the seasonal count noted.

Companies read with the same leading pattern

Other companies whose largest staffing pattern is also Nonmetallic Mineral Mining and Quarrying, largest first, each read from its own annual report. Within reach now and at the end of 2028, long-run pace, four in five.

• The Mosaic Company (MOS, 13,249 employees)19% now, 29% by 2028
• Vulcan Materials Company (VMC, 11,548 employees)16% now, 24% by 2028
• Martin Marietta Materials, Inc. (MLM, 9,600 employees)15% now, 22% by 2028

What the filing says about AI

5 sentences in the filing name AI. The filing says it is starting to introduce AI tools to its technology users and may adopt generative AI for specific use cases, and names vendors' undisclosed use of generative AI among its risks.

• “Issues in the development and use of artificial intelligence, combined with an uncertain regulatory environment, may result in reputational harm, liability or other adverse consequences to our business operations.”
• “We are starting to introduce artificial intelligence tools to our technology users and may adopt and integrate generative artificial intelligence tools for specific use cases.”
• “Our vendors may incorporate generative artificial intelligence tools into their offerings without disclosing this use to us, and the providers of these generative artificial intelligence tools may not meet existing or rapidly evolving regulatory or industry standards with respect to privacy and data protection and may inhibit Knife River or its vendors' ability to maintain an adequate level of...”
• “If Knife River, its vendors, or its third-party partners experience an actual or perceived breach of privacy or security incident because of the use of generative artificial intelligence, we may lose valuable intellectual property and confidential information and our reputation and the public perception of the effectiveness of our security measures could be harmed.”
• “Further, bad actors around the world use increasingly sophisticated methods, including the use of artificial intelligence, to engage in illegal activities involving the theft and misuse of personal information, confidential information and intellectual property.”

Its annual reports, year by year

Sentences naming AI in each annual report, counted by one rule, beside the median report in the Index that year. Each count links its filing. Every company, by year and sector

• Fiscal 20238median 1
• Fiscal 20245median 4
• Fiscal 20255median 10

Headcount by filing year

As reported in each year's annual report, with the filing. A year marked not read had no figure the reading could take from the report's text.

Limits of this reading

• The collector took the peak construction season count of 6,900; rule 2 takes the year-end 5,298, with the seasonal count in the notes.
• No count by product line or segment; the split by description follows the revenue lines and the contracting services the filing describes.

Source: the company's annual report on EDGAR, accession 0001955520-26-000003, the filing. Read by Claude Fable 5.1 under rubric version 1, by the method. A company can write to info@stratussc.com to have its reading checked against its filing.