The National Western Life Group, Inc. Incentive Plan (the “Plan”) established as of February 5, 2014, is hereby amended and restated, effective as of December 14, 2022, which amendment and restatement # removes certain provisions in the Plan that have become non-operative as a result of the elimination by the U.S. Congress of certain provisions of Code section 162(m) in 2017, # prospectively modifies the definition of “Change in Control” and # makes certain non-substantive technical corrections to the Plan. Capitalized terms used herein without definition shall have the respective meanings assigned to them in Section 2.

UNSECURED TRUST. Before a Change of Control, Interpublic shall contribute to an Unsecured Trust an amount equal to the value of the sum of all benefits that would become payable under the Plan if every Participant employed by Interpublic and/or any other Employer immediately before the Change of Control terminated employment involuntarily, and without Cause, immediately after the Change of Control. The amount

Trust Waiver. Notwithstanding anything herein to the contrary, the Payee hereby waives any and all right, title, interest or claim of any kind (“Claim”) in or to any distribution of or from the trust account to be established in which the proceeds of the initial public offering (the “IPO”) to be conducted by the Maker (including the deferred underwriters discounts and commissions) and the proceeds of the sale of the warrants to be issued in a private placement to occur prior to the closing of the IPO are to be deposited, as described in greater detail in the registration statement and prospectus to be filed with the Securities and Exchange Commission in connection with the IPO, and hereby agrees not to seek recourse, reimbursement, payment or satisfaction for any Claim against the trust account for any reason whatsoever.

Trust Agreement. All assets of the Plan shall be held under the Trust Agreement between the Company and the Trustee designated by the Company, which shall serve at the pleasure thereof. The Trust Agreement shall provide, among other things, for a Trust Fund to be administered by the Trustee to which all contributions shall be paid, and the Trustee shall have such rights, powers, and duties as the Company shall from time to time determine. All assets of the Trust Fund shall be held, invested, and reinvested in accordance with the provisions of the Trust Agreement.

Trust Fund. As of the date hereof, BRPA has no less than five million nine hundred thousand dollars ($5,900,000) in a trust account administered by Continental, such monies being invested in United States Government securities or money market funds meeting the conditions under Rule 2a-7(d) promulgated under the Investment Company Act of 1940, as amended (the “Trust Fund”), held in trust pursuant to that certain Investment Management Trust Agreement, dated as of November 20, 2017, between BRPA and Continental (the “Trust Agreement”). The Trust Agreement is valid and in full force and effect and enforceable in accordance with its terms and has not been amended or modified. There are no separate contracts, side letters or other arrangements or understandings (whether written or unwritten, express or implied) that would cause the description of the Trust Agreement in the BRPA SEC Reports to be inaccurate or that would entitle any Person (other than pursuant to valid redemptions by BRPA Stockholders) to any portion of the proceeds in the Trust Fund. There are no proceedings pending or, to the knowledge of BRPA, threatened with respect to the Trust Fund. The Trust Fund will be utilized in accordance with Section 5.13.

Establishment of Goals. The Compensation Committee will establish the performance goals for each Covered Executive for each Performance Period. Such performance goals will be set forth in a writing provided to each Covered Executive. The Compensation Committee may establish different performance goals for different Covered Executives during the same Performance Period.

The Executive Incentive Compensation Plan (the “Plan”) was adopted by the Board of Directors of Knife River Corporation (formerly known as Knife River Holding Company) (“KRC”) in connection with the distribution of 80.1% or more of the outstanding shares of KRC’s common stock to the stockholders of MDU Resources Group, Inc. in 2023, pursuant to the Separation and Distribution Agreement between the Company and MDU Resources Group, Inc. entered into in connection with such distribution (the “Spin-Off”) and is effective as of the date on which the Spin-Off occurs. In connection with the Spin-Off and pursuant to the Employee Matters Agreement, KRC is assuming liability for certain awards deferred under the MDU Resources Group, Inc. Executive Incentive Compensation Plan by current and former KRC employees in respect of the 2021 Plan Year and prior Plan Years (as such amounts are adjusted from time to time to reflect crediting of interest, the “Grandfathered Deferred Amounts”), and such Grandfathered Deferred Amounts will be administered from and after the Spin-Off by KRC pursuant to this Plan and the Rules and Regulations (as defined below).

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Establishment of Fees. Manager shall assist Provider in establishing the commercially reasonable fees that Provider shall charge for all Wound Care Products offered for sale by Provider.

Establishment of Fees. Manager shall assist Provider in establishing the commercially reasonable fees that Provider shall charge for Storage and for Cells.