Knife River Corp

Q: Jun 30 2026

Q: Mar 31 2026

FY: Dec 31 2025

Q: Sep 30 2025

Q: Jun 30 2025

Q: Mar 31 2025

FY: Dec 31 2024

Q: Sep 30 2024

Q: Jun 30 2024

Q: Mar 31 2024

FY: Dec 31 2023

Q: Sep 30 2023

Q: Jun 30 2023

Q: Mar 31 2023

Regulation FD Disclosure

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Entry into a Material Definitive Agreement

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Material Modifications to Rights of Security Holders

Results of Operations and Financial Condition

Other Events

Entry into a Material Definitive Agreement

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

1.01,9.01

Results of Operations and Financial Condition

5.02,9.01

2.02,7.01,9.01

5.02,7.01,9.01

5.07,9.01

Prospectus Supplement with Pricing Information

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement with Pricing Information

Notice of Effectiveness

Registration (IPO) statement under Securities Act of 1933

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Certification of approval for listing and registration on a national securities exchange

No description available

No description available

No description available

No description available

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Preliminary Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Fagg Karen B

PRICE T ROWE ASSOCIATES INC /MD/

Capital World Investors

VANGUARD PORTFOLIO MANAGEMENT LLC

Fagg Karen B

Chiodo Patricia

Carmona-Alvarez German

Rebstock Peggy S.

Hill Thomas W.

Fagg Karen B

MOSS PATRICIA L

SANDBROOK WILLIAM J

PRICE T ROWE ASSOCIATES INC /MD/

VANGUARD CAPITAL MANAGEMENT LLC

Fagg Karen B

VANGUARD GROUP INC

Gray Brian R.

Hastings Trevor J

Ring Nathan W

Liepitz Karl A

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual Report Scanned (Paper)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Annual Report Scanned (Paper)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual Report Scanned (Paper)

Draft registration statement (confidential submission)

No description available

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC