Knife River Corp

Index

Note 9 –Debt

Certain debt instruments of ours contain restrictive and financial covenants and cross-default provisions. In order to borrow under the debt instruments, we must be in compliance with the applicable covenants and certain other conditions, all of which management believes we, as applicable, were in compliance with at December 31, 2024. In the event we do not comply with the applicable covenants and other conditions, we would be in default on our agreements and alternative sources of funding may need to be pursued.

Long-term Debt Outstanding Long-term debt outstanding was as follows:

Senior Notes

On April 25, 2023, we issued $425.0 million of 7.75 percent senior notes due May 1, 2031, pursuant to an indenture.

Term Loan and Revolving Credit Facility

On May 31, 2023, we entered into afive-year secured credit agreement, which provides for a $275.0 million term loan and a $350.0 million revolving credit facility. As of December 31, 2024, we hadno borrowings outstanding under the revolving credit facility and had a borrowing capacity of $329.4 million under the revolving credit facility, which is net of $20.6 million of outstanding letters of credit.

The secured credit agreement bears interest equal to, at our option, either (i) a base rate determined by reference to the highest of (a) the prime rate, (b) the federal funds rate plus 0.50 percent, and (c) SOFR plus 1.10 percent, plus an applicable margin of 0.75 percent to 1.50 percent, based upon our leverage ratio, for base rate loans or (ii) a SOFR rate determined by the interest period relevant to such borrowing plus an applicable margin of 1.75 percent to 2.50 percent, based upon our leverage ratio. We will incur a quarterly commitment fee on the undrawn portion of the revolving credit facility of 0.25 percent to 0.50 percent, based on our leverage ratio.

The term loan has a mandatory annual amortization of 2.50 percent for years one and two,5.00 percent for years three and four, and 7.50 percent in the fifth year. The agreement contains customary covenants and provisions, including a covenant of us not to permit, at any time, the ratio of total debt to trailing twelve month Adjusted EBITDA, as defined by the agreement, to be greater than 4.75 to 1.00. The agreement also contains an interest coverage ratio covenant stating that our trailing twelve month Adjusted EBITDA, as defined by the agreement, to interest expense is to be no less than 2.25 to 1.00. The covenants also include restrictions on the sale of certain assets, loans and investments.

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Schedule of Debt Maturities Long-term debt maturities, which excludes unamortized debt issuance costs, for the five years and thereafter following December 31, 2024, were as follows: