Knife River Corp SEC filings KNF
Knife River Corp has 191 filings in SEC EDGAR's recent list, going back to Dec 14, 2022. Its latest annual report, Form ARS, was filed on Apr 6, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 3, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 3, 2026 (results of operations, regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 10-Q | Quarterly report | Nov 3, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 3, 2026 | Nov 3, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 7, 2026 | — |
| 4 | Insider transaction | Oct 1, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 23, 2026 | Sep 23, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 12, 2026 | — |
| 10-Q | Quarterly report | Aug 4, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 4, 2026 | Aug 4, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 31, 2026 | — |
| 4 | Insider transaction | Jul 1, 2026 | Jun 30, 2026 |
| 11-K | Employee savings plan report | Jun 17, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | May 21, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 20, 2026 |
| 3 | Initial insider ownership | May 21, 2026 | May 21, 2026 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 21, 2026 | May 20, 2026 |
| 8-K |
Current report
Material agreement, New debt
|
May 18, 2026 | May 15, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| 10-Q | Quarterly report | May 5, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 5, 2026 | May 5, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 30, 2026 | — |
| ARS | Annual report to shareholders | Apr 6, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 6, 2026 | — |
| DEF 14A | Proxy statement | Apr 6, 2026 | May 20, 2026 |
| 4 | Insider transaction | Apr 1, 2026 | Mar 31, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 4 | Insider transaction | Mar 9, 2026 | Mar 6, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 4, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 4, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 4, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 4, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 4, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 4, 2026 |
| 10-K | Annual report | Feb 20, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Feb 17, 2026 | Feb 12, 2026 |
| 4 | Insider transaction | Feb 17, 2026 | Feb 12, 2026 |
| 4 | Insider transaction | Feb 17, 2026 | Feb 12, 2026 |
| 4 | Insider transaction | Feb 17, 2026 | Feb 12, 2026 |
| 4 | Insider transaction | Feb 17, 2026 | Feb 12, 2026 |
| 4 | Insider transaction | Feb 17, 2026 | Feb 12, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 17, 2026 | Feb 17, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| 10-Q | Quarterly report | Nov 5, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 4, 2025 | Nov 4, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2025 | — |
| 10-Q | Quarterly report | Aug 5, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 5, 2025 | Aug 5, 2025 |
| 11-K | Employee savings plan report | Jun 12, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change, Shareholder vote results
|
May 28, 2025 | May 22, 2025 |
| 4 | Insider transaction | May 27, 2025 | May 22, 2025 |
| 4 | Insider transaction | May 27, 2025 | May 22, 2025 |
| 4 | Insider transaction | May 27, 2025 | May 22, 2025 |
| 4 | Insider transaction | May 27, 2025 | May 22, 2025 |
| 4 | Insider transaction | May 27, 2025 | May 22, 2025 |
| 4 | Insider transaction | May 27, 2025 | May 22, 2025 |
| UPLOAD | Letter from the SEC | May 27, 2025 | — |
| CORRESP | Letter to the SEC | May 14, 2025 | — |
| UPLOAD | Letter from the SEC | May 8, 2025 | — |
| 10-Q | Quarterly report | May 6, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 6, 2025 | May 6, 2025 |
| 3 | Initial insider ownership | Apr 25, 2025 | Apr 19, 2025 |
| ARS | Annual report to shareholders | Apr 7, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 7, 2025 | — |
| DEF 14A | Proxy statement | Apr 7, 2025 | May 22, 2025 |
| PRE 14A | Preliminary proxy statement | Mar 28, 2025 | May 22, 2025 |
| 8-K |
Current report
Other events
|
Mar 28, 2025 | Mar 28, 2025 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Mar 10, 2025 | Mar 7, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 4 | Insider transaction | Mar 3, 2025 | Feb 27, 2025 |
| 10-K | Annual report | Feb 21, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 13, 2025 | Feb 13, 2025 |
| 8-K |
Current report
Officer or director change
|
Jan 17, 2025 | Jan 17, 2025 |
| 4 | Insider transaction | Jan 2, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Material agreement
|
Dec 26, 2024 | Dec 20, 2024 |
| 10-Q | Quarterly report | Nov 4, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 4, 2024 | Nov 4, 2024 |
| 4 | Insider transaction | Oct 1, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Officer or director change
|
Aug 21, 2024 | Aug 20, 2024 |
| 10-Q | Quarterly report | Aug 6, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 6, 2024 | Aug 6, 2024 |
| 4 | Insider transaction | Jun 28, 2024 | Jun 27, 2024 |
| 4 | Insider transaction | Jun 28, 2024 | Jun 28, 2024 |
| 3 | Initial insider ownership | Jun 27, 2024 | Jun 27, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jun 27, 2024 | Jun 27, 2024 |
| 11-K | Employee savings plan report | Jun 11, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Shareholder vote results
|
May 17, 2024 | May 14, 2024 |
| 4 | Insider transaction | May 16, 2024 | May 15, 2024 |
| 4 | Insider transaction | May 16, 2024 | May 15, 2024 |
| 4 | Insider transaction | May 16, 2024 | May 15, 2024 |
| 4 | Insider transaction | May 16, 2024 | May 15, 2024 |
| 4 | Insider transaction | May 16, 2024 | May 15, 2024 |
| 3 | Initial insider ownership | May 15, 2024 | May 14, 2024 |
| 10-Q | Quarterly report | May 7, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 7, 2024 | May 7, 2024 |
| 4 | Insider transaction | Apr 1, 2024 | Mar 29, 2024 |
| ARS | Annual report to shareholders | Mar 29, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Mar 29, 2024 | — |
| DEF 14A | Proxy statement | Mar 29, 2024 | May 14, 2024 |
| 4 | Insider transaction | Mar 4, 2024 | Feb 29, 2024 |
| 10-K | Annual report | Feb 27, 2024 | Dec 31, 2023 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 15, 2024 | Feb 15, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 23, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Dec 8, 2023 | — |
| 4 | Insider transaction | Nov 16, 2023 | Nov 15, 2023 |
| 4 | Insider transaction | Nov 16, 2023 | Nov 15, 2023 |
| 4 | Insider transaction | Nov 16, 2023 | Nov 15, 2023 |
| 4 | Insider transaction | Nov 16, 2023 | Nov 15, 2023 |
| 4 | Insider transaction | Nov 16, 2023 | Nov 15, 2023 |
| 4 | Insider transaction | Nov 13, 2023 | Nov 10, 2023 |
| 424B4 | Prospectus | Nov 8, 2023 | — |
| 424B3 | Prospectus | Nov 6, 2023 | — |
| 424B4 | Prospectus | Nov 6, 2023 | — |
| 424B3 | Prospectus | Nov 6, 2023 | — |
| 10-Q | Quarterly report | Nov 6, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 6, 2023 | Nov 6, 2023 |
| EFFECT | Filing | Sep 28, 2023 | — |
| S-1 | Registration statement | Sep 26, 2023 | — |
| DRS | Filing | Sep 1, 2023 | — |
| 10-Q | Quarterly report | Aug 8, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 8, 2023 | Aug 8, 2023 |
| 4/A | Filing | Jul 28, 2023 | Jul 12, 2023 |
| 4/A | Filing | Jul 28, 2023 | Jul 12, 2023 |
| 4/A | Filing | Jul 28, 2023 | Jul 12, 2023 |
| 4/A | Filing | Jul 28, 2023 | Jul 12, 2023 |
| 4/A | Filing | Jul 28, 2023 | Jul 12, 2023 |
| 4 | Insider transaction | Jul 13, 2023 | Jul 12, 2023 |
| 4 | Insider transaction | Jul 13, 2023 | Jul 12, 2023 |
| 4 | Insider transaction | Jul 13, 2023 | Jul 12, 2023 |
| 4 | Insider transaction | Jul 13, 2023 | Jul 12, 2023 |
| 4 | Insider transaction | Jul 13, 2023 | Jul 12, 2023 |
| 4 | Insider transaction | Jul 13, 2023 | Jul 12, 2023 |
| SC 13G | Ownership over 5% (passive) | Jul 7, 2023 | — |
| 4 | Insider transaction | Jun 2, 2023 | May 31, 2023 |
| S-8 | Employee stock plan registration | Jun 2, 2023 | — |
| S-8 | Employee stock plan registration | Jun 2, 2023 | — |
| 3 | Initial insider ownership | Jun 1, 2023 | May 31, 2023 |
| 3 | Initial insider ownership | Jun 1, 2023 | May 31, 2023 |
| 3 | Initial insider ownership | Jun 1, 2023 | May 31, 2023 |
| 3 | Initial insider ownership | Jun 1, 2023 | May 31, 2023 |
| 3 | Initial insider ownership | Jun 1, 2023 | May 31, 2023 |
| 3 | Initial insider ownership | Jun 1, 2023 | May 31, 2023 |
| 3 | Initial insider ownership | Jun 1, 2023 | May 31, 2023 |
| 3 | Initial insider ownership | Jun 1, 2023 | May 31, 2023 |
| 8-K |
Current report
Material agreement, New debt, Change to shareholder rights, Change in control, Officer or director change, Bylaw or fiscal year change, Regulation FD disclosure, Other events
|
Jun 1, 2023 | May 30, 2023 |
| 3 | Initial insider ownership | May 22, 2023 | May 21, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
May 18, 2023 | May 18, 2023 |
| 10-Q | Quarterly report | May 16, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
May 12, 2023 | May 10, 2023 |
| 3 | Initial insider ownership | May 10, 2023 | May 10, 2023 |
| 3 | Initial insider ownership | May 10, 2023 | May 10, 2023 |
| 3 | Initial insider ownership | May 10, 2023 | May 10, 2023 |
| 3 | Initial insider ownership | May 10, 2023 | May 10, 2023 |
| 3 | Initial insider ownership | May 10, 2023 | May 10, 2023 |
| 3 | Initial insider ownership | May 10, 2023 | May 10, 2023 |
| 3 | Initial insider ownership | May 10, 2023 | May 10, 2023 |
| SEC STAFF ACTION | Filing | May 10, 2023 | — |
| CERT | Nyse certification | May 9, 2023 | — |
| CORRESP | Letter to the SEC | May 8, 2023 | — |
| 10-12B/A | Filing | May 8, 2023 | — |
| CORRESP | Letter to the SEC | May 3, 2023 | — |
| UPLOAD | Letter from the SEC | May 3, 2023 | — |
| CORRESP | Letter to the SEC | Apr 28, 2023 | — |
| 10-12B/A | Filing | Apr 28, 2023 | — |
| UPLOAD | Letter from the SEC | Apr 17, 2023 | — |
| CORRESP | Letter to the SEC | Apr 7, 2023 | — |
| 10-12B/A | Filing | Apr 7, 2023 | — |
| UPLOAD | Letter from the SEC | Mar 21, 2023 | — |
| CORRESP | Letter to the SEC | Mar 10, 2023 | — |
| 10-12B | Form 10-12b | Mar 10, 2023 | — |
| UPLOAD | Letter from the SEC | Feb 15, 2023 | — |
| DRSLTR | Filing | Feb 3, 2023 | — |
| DRS/A | Filing | Feb 3, 2023 | — |
| UPLOAD | Letter from the SEC | Jan 13, 2023 | — |
| DRS | Filing | Dec 14, 2022 | — |
Showing 191 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Mining & Quarrying of Nonmetallic Minerals (No Fuels) (SIC 1400)
- Listed as
- KNF (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Bismarck, ND
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1955520
- Former names
- Knife River Holding Co (until Jun 1, 2023)
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All 37 Mining & Quarrying of Nonmetallic Minerals (No Fuels) companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.