KNF

SEC source: 0001225208-24-006118 · doc4.xml · nonDerivative · entry 2

Fagg Karen B · CIK 0001345449 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,127

F2 · shares: Represents shares of common stock of the issuer granted to the reporting person for service on the board of directors from January 1, 2024 through May 14, 2024.

SEC source: 0001225208-24-006118 · doc4.xml · nonDerivative · entry 1

Fagg Karen B · CIK 0001345449 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,286

F1 · shares: Represents restricted stock units (RSUs) that vest on the day immediately prior to the date of the next Knife River Corporation (the "issuer") annual meeting of stockholders occurring after the date of grant and subject to the reporting person continuing in service on the board of directors of the issuer through such vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

SEC source: 0001225208-24-006122 · doc4.xml · nonDerivative · entry 2

SANDBROOK WILLIAM J · CIK 0001527678 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,144

F2 · shares: Represents shares of common stock of the issuer granted to the reporting person for service on the board of directors from January 1, 2024 through May 14, 2024.

SEC source: 0001225208-24-006122 · doc4.xml · nonDerivative · entry 1

SANDBROOK WILLIAM J · CIK 0001527678 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,424

F1 · shares: Represents restricted stock units (RSUs) that vest on the day immediately prior to the date of the next Knife River Corporation (the "issuer") annual meeting of stockholders occurring after the date of grant and subject to the reporting person continuing in service on the board of directors of the issuer through such vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

SEC source: 0001225208-24-006117 · doc4.xml · nonDerivative · entry 2

Carmona-Alvarez German · CIK 0001954052 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,434

F2 · shares: Represents shares of common stock of the issuer granted to the reporting person for service on the board of directors from January 1, 2024 through May 14, 2024.

SEC source: 0001225208-24-006117 · doc4.xml · nonDerivative · entry 1

Carmona-Alvarez German · CIK 0001954052 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,714

F1 · shares: Represents restricted stock units (RSUs) that vest on the day immediately prior to the date of the next Knife River Corporation (the "issuer") annual meeting of stockholders occurring after the date of grant and subject to the reporting person continuing in service on the board of directors of the issuer through such vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

SEC source: 0001225208-24-004689 · doc4.xml · derivative · entry 2

Fagg Karen B · CIK 0001345449 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 218.591

Underlying: Common Stock · 218.591 shares

Expires not disclosed

F1 · derivative.exercise_price: Each share of phantom stock is the economic equivalent of one share of common stock. The shares of phantom stock become payable in cash upon the reporting person's termination of service as a director.

F1 · derivative.exercise_date: Each share of phantom stock is the economic equivalent of one share of common stock. The shares of phantom stock become payable in cash upon the reporting person's termination of service as a director.

F1 · derivative.expiration_date: Each share of phantom stock is the economic equivalent of one share of common stock. The shares of phantom stock become payable in cash upon the reporting person's termination of service as a director.

SEC source: 0001225208-24-003499 · doc4.xml · nonDerivative · entry 1

Gray Brian R. · CIK 0001966900 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trustee

Disclosed balance after: 8,167.4133

F1 · shares: Reflects shares purchased within the issuer's 401(k) plan pursuant to investment rebalancing activity.

F2 · balance_after: Includes 204.5808 shares acquired since December 31, 2023 due to plan activity in the fund.

SEC source: 0001225208-24-002955 · doc4.xml · nonDerivative · entry 1

Gray Brian R. · CIK 0001966900 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,837

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2026, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

F2 · balance_after: Includes 17 shares of common stock that were not previously reported due to an administrative error.

SEC source: 0001225208-24-002960 · doc4.xml · nonDerivative · entry 2

Ring Nathan W · CIK 0001596125 · Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,160

F2 · shares: Represents shares withheld by issuer to cover tax withholding obligations upon vesting of a RSU award.

SEC source: 0001225208-24-002960 · doc4.xml · nonDerivative · entry 1

Ring Nathan W · CIK 0001596125 · Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,668

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2026, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

SEC source: 0001225208-24-002953 · doc4.xml · nonDerivative · entry 2

Hastings Trevor J · CIK 0001719997 · Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,010

F2 · shares: Represents shares withheld by issuer to cover tax withholding obligations upon vesting of a RSU award.

SEC source: 0001225208-24-002953 · doc4.xml · nonDerivative · entry 1

Hastings Trevor J · CIK 0001719997 · Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,290

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2026, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

SEC source: 0001225208-24-002957 · doc4.xml · nonDerivative · entry 2

Liepitz Karl A · CIK 0001840120 · VP, Chief Legal Officer & Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,661

F3 · shares: Represents shares withheld by issuer to cover tax withholding obligations upon vesting of a RSU award.

SEC source: 0001225208-24-002957 · doc4.xml · nonDerivative · entry 1

Liepitz Karl A · CIK 0001840120 · VP, Chief Legal Officer & Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,904

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2026, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

F2 · balance_after: Includes 13,678 RSUs that vested on December 31, 2023; 17,993 RSUs that vest on December 31, 2024; and 21,885 RSUs that vest on December 31, 2025, provided, in each case, that the reporting person remains employed by the issuer as of the applicable vesting date. Each RSU represents or represented, as applicable, the contingent right to receive one share of the issuer's common stock. Such RSUs were converted from certain previously granted equity-based awards of MDU Resources Group, Inc., the issuer's former parent company, in connection with approximately 90% of the issuer's outstanding common stock being distributed to shareholders of MDU Resources Group, Inc. on May 31, 2023.

SEC source: 0001225208-24-002959 · doc4.xml · nonDerivative · entry 2

Pladsen Glenn R. · CIK 0001978493 · VP of Support Services

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,604

F2 · shares: Represents shares withheld by issuer to cover tax withholding obligations upon vesting of a RSU award.

SEC source: 0001225208-24-002959 · doc4.xml · nonDerivative · entry 1

Pladsen Glenn R. · CIK 0001978493 · VP of Support Services

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,545

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2026, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

SEC source: 0001225208-24-002956 · doc4.xml · nonDerivative · entry 1

Kadrmas Marney L. · CIK 0001979052 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,241

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2026, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

SEC source: 0001225208-24-002952 · doc4.xml · nonDerivative · entry 2

Christenson Nancy K. · CIK 0001974711 · VP of Administration

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,359

F2 · shares: Represents shares withheld by issuer to cover tax withholding obligations upon vesting of a RSU award.

SEC source: 0001225208-24-002952 · doc4.xml · nonDerivative · entry 1

Christenson Nancy K. · CIK 0001974711 · VP of Administration

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,739

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2026, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

SEC source: 0001225208-23-010260 · doc4.xml · nonDerivative · entry 1

EVERIST THOMAS S · CIK 0001188880 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,260

SEC source: 0001225208-23-010262 · doc4.xml · nonDerivative · entry 1

MOSS PATRICIA L · CIK 0001190817 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,658

SEC source: 0001225208-23-010261 · doc4.xml · nonDerivative · entry 1

Fagg Karen B · CIK 0001345449 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,064

SEC source: 0001225208-23-010263 · doc4.xml · nonDerivative · entry 1

SANDBROOK WILLIAM J · CIK 0001527678 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,519

SEC source: 0001225208-23-010259 · doc4.xml · nonDerivative · entry 1

Carmona-Alvarez German · CIK 0001954052 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,809

SEC source: 0001225208-23-010176 · doc4.xml · nonDerivative · entry 1

MDU RESOURCES GROUP INC · CIK 0000067716 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · shares: The reporting person exchanged 5,656,621 shares of the common stock of the Issuer to extinguish $310 million aggregate principal amount of indebtedness under a short-term credit facility of the reporting person in a debt-for-equity exchange.

F2 · price: The value of the Issuer's common stock for purposes of the debt-for-equity exchange was $54 per share.

SEC source: 0001225208-23-007502 · doc4.xml · nonDerivative · entry 1

Gray Brian R. · CIK 0001966900 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,051

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2025, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

F2 · balance_after: Includes 128 shares of the issuer's common stock and 21,227 RSUs that vest on December 31, 2025, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

SEC source: 0001225208-23-007506 · doc4.xml · nonDerivative · entry 1

Ring Nathan W · CIK 0001596125 · Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,863

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2025, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

F2 · balance_after: Includes 3,128 shares of the issuer's common stock, 3,726 RSUs that vest on December 31, 2023, 4,258 RSUs that vest on December 31, 2024, and 4,768 RSUs that vest on December 31, 2025, provided, in each case, that the reporting person remains employed by the issuer as of the applicable vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock. Such RSUs were converted from certain previously granted equity-based awards of MDU Resources Group, Inc., the issuer's former parent company, in connection with approximately 90% of the issuer's outstanding common stock being distributed to shareholders of MDU Resources Group, Inc. on May 31, 2023.

SEC source: 0001225208-23-007503 · doc4.xml · nonDerivative · entry 1

Hastings Trevor J · CIK 0001719997 · Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,485

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2025, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

F2 · balance_after: Includes 10,017 shares of the issuer's common stock, 8,506 RSUs that vest on December 31, 2023, 10,223 RSUs that vest on December 31, 2024, and 11,503 RSUs that vest on December 31, 2025, provided, in each case, that the reporting person remains employed by the issuer as of the applicable vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock. Such RSUs were converted from certain previously granted equity-based awards of MDU Resources Group, Inc., the issuer's former parent company, in connection with approximately 90% of the issuer's outstanding common stock being distributed to shareholders of MDU Resources Group, Inc. on May 31, 2023.

SEC source: 0001225208-23-007505 · doc4.xml · nonDerivative · entry 1

Pladsen Glenn R. · CIK 0001978493 · VP of Support Services

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,392

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2025, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

F2 · balance_after: Includes 5,690 shares of the issuer's common stock, 2,557 RSUs that vest on December 31, 2023, 3,655 RSUs that vest on December 31, 2024, and 4,092 RSUs that vest on December 31, 2025, provided, in each case, that the reporting person remains employed by the issuer as of the applicable vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock. Such RSUs were converted from certain previously granted equity-based awards of MDU Resources Group, Inc., the issuer's former parent company, in connection with approximately 90% of the issuer's outstanding common stock being distributed to shareholders of MDU Resources Group, Inc. on May 31, 2023.

SEC source: 0001225208-23-007504 · doc4.xml · nonDerivative · entry 1

Kadrmas Marney L. · CIK 0001979052 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,191

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2025, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

SEC source: 0001225208-23-007501 · doc4.xml · nonDerivative · entry 1

Christenson Nancy K. · CIK 0001974711 · VP of Administration

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,586

F1 · shares: Represents restricted stock units (RSUs) that vest on December 31, 2025, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock.

F2 · balance_after: Includes 10,737 shares of the issuer's common stock, 3,361 RSUs that vest on December 31, 2023, 3,935 RSUs that vest on December 31, 2024, and 4,407 RSUs that vest on December 31, 2025, provided, in each case, that the reporting person remains employed by the issuer as of the applicable vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock. Such RSUs were converted from certain previously granted equity-based awards of MDU Resources Group, Inc., the issuer's former parent company, in connection with approximately 90% of the issuer's outstanding common stock being distributed to shareholders of MDU Resources Group, Inc. on May 31, 2023.

SEC source: 0001225208-23-006527 · doc4.xml · nonDerivative · entry 1

MDU RESOURCES GROUP INC · CIK 0000067716 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,656,621

F1 · kind: On May 10, 2023, MDU Resources Group, Inc. ("MDU Resources") reported that it owned 1,000 shares of common stock of Knife River Corporation ("Knife River"), which at the time was all of the issued and outstanding shares of common stock of Knife River. Pursuant to a plan of separation approved by the board of directors of MDU Resources, MDU Resources made a pro rata distribution to its stockholders of record as of the close of business on May 22, 2023, of approximately 90% of the outstanding Knife River common stock (the "Distribution"). In anticipation of the Distribution, which occurred at 11:59 p.m. Eastern time on May 31, 2023 (the "Distribution Date"), Knife River issued 56,996,350 shares of Knife River common stock to MDU Resources, such that MDU Resources owned 56,997,350 shares of Knife River common stock, representing all of the issued and outstanding shares of Knife River common stock as of the Distribution Date and prior to the Distribution.

F2 · shares: In connection with the Distribution, MDU Resources (i) distributed 50,909,593 shares of Knife River common stock to its stockholders by way of a pro rata dividend, (ii) transferred 431,136 shares of Knife River common stock to Knife River Corporation - Northwest, a wholly owned subsidiary of Knife River, in settlement of that certain hook stock exchange agreement dated May 19, 2023, and (iii) retained the remaining 5,656,621 shares of Knife River common stock. A summary of the hook stock exchange can be found in the section entitled "Capitalization" in Knife River's information statement, dated as of and filed with the Securities and Exchange Commission on May 10, 2023.

F2 · balance_after: In connection with the Distribution, MDU Resources (i) distributed 50,909,593 shares of Knife River common stock to its stockholders by way of a pro rata dividend, (ii) transferred 431,136 shares of Knife River common stock to Knife River Corporation - Northwest, a wholly owned subsidiary of Knife River, in settlement of that certain hook stock exchange agreement dated May 19, 2023, and (iii) retained the remaining 5,656,621 shares of Knife River common stock. A summary of the hook stock exchange can be found in the section entitled "Capitalization" in Knife River's information statement, dated as of and filed with the Securities and Exchange Commission on May 10, 2023.