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 |
|---|---|---|---|
| 424B4 | Prospectus | Nov 8, 2023 | — |
| 424B3 | Prospectus | Nov 6, 2023 | — |
| 424B4 | Prospectus | Nov 6, 2023 | — |
| 424B3 | Prospectus | Nov 6, 2023 | — |
| S-1 | Registration statement | Sep 26, 2023 | — |
| S-8 | Employee stock plan registration | Jun 2, 2023 | — |
| S-8 | Employee stock plan registration | Jun 2, 2023 | — |
Showing 7 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.