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 |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 7, 2026 | — |
| 4 | Insider transaction | Oct 1, 2026 | Sep 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 12, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 31, 2026 | — |
| 4 | Insider transaction | Jul 1, 2026 | Jun 30, 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 |
| 4 | Insider transaction | May 21, 2026 | May 20, 2026 |
| 3 | Initial insider ownership | May 21, 2026 | May 21, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 30, 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 |
| 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 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 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 |
| 3 | Initial insider ownership | Apr 25, 2025 | Apr 19, 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 |
| 4 | Insider transaction | Jan 2, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Oct 1, 2024 | Sep 30, 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 |
| 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 |
| 4 | Insider transaction | Apr 1, 2024 | Mar 29, 2024 |
| 4 | Insider transaction | Mar 4, 2024 | Feb 29, 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 |
| 4 | Insider transaction | Feb 26, 2024 | Feb 22, 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 |
| 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 |
| 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 |
| 3 | Initial insider ownership | May 22, 2023 | May 21, 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 |
Showing 104 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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Source: SEC EDGAR filings. This is company-reported data, not investment advice.