Company filings profile · CIK 0001955520
Knife River Corp — SEC filings & insider activity.
Real, source-linked SEC EDGAR activity for Knife River Corp (KNF): 7 filings in the last 90 days vs 18 in the prior 90 (filing-velocity cooling ↓ · 0.39×). Latest material 8-K events, insider Form-4 transactions, and periodic reports — monitored for change.
✔ Verified against the public SEC EDGAR filing record as of Sep 24, 2026. Source-linked, daily-refreshed.
Material 8-K events — Knife River Corp
8-K disclosures decoded by item code (the material events: agreements, results, control/management changes, impairments, restatements).
| Filed | Event | |
|---|---|---|
| Sep 23, 2026 | Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Aug 4, 2026 | Results of Operations (earnings); Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| May 21, 2026 | Departure/Election of Directors or Officers; Item 5.07; Financial Statements and Exhibits | ↗ |
| May 18, 2026 | Entry into a Material Agreement; Material Direct Financial Obligation; Financial Statements and Exhibits | ↗ |
| May 5, 2026 | Results of Operations (earnings); Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
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Insider transactions (Form 4 / 3 / 5)
Recent filings
| Filed | Form | Detail | |
|---|---|---|---|
| Sep 23, 2026 | 8-K | Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Aug 14, 2026 | SCHEDULE 13G/A | ↗ | |
| Aug 12, 2026 | SCHEDULE 13G | ↗ | |
| Aug 4, 2026 | 10-Q | KNIFE RIVER FORM 10-Q 06-30-2026 | ↗ |
| Aug 4, 2026 | 8-K | Results of Operations (earnings); Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Jul 31, 2026 | SCHEDULE 13G | ↗ | |
| Jul 1, 2026 | 4 | ↗ | |
| Jun 17, 2026 | 11-K | KNIFE RIVER CORPORATION FORM 11-K | ↗ |
| May 21, 2026 | 4 | ↗ | |
| May 21, 2026 | 4 | ↗ | |
| May 21, 2026 | 4 | ↗ | |
| May 21, 2026 | 4 | ↗ | |
| May 21, 2026 | 4 | ↗ | |
| May 21, 2026 | 4 | ↗ | |
| May 21, 2026 | 3 | ↗ | |
| May 21, 2026 | 8-K | Departure/Election of Directors or Officers; Item 5.07; Financial Statements and Exhibits | ↗ |
| May 18, 2026 | 8-K | Entry into a Material Agreement; Material Direct Financial Obligation; Financial Statements and Exhibits | ↗ |
| May 15, 2026 | SCHEDULE 13G/A | ↗ | |
| May 5, 2026 | 10-Q | KNIFE RIVER FORM 10-Q 03-31-2026 | ↗ |
| May 5, 2026 | 8-K | Results of Operations (earnings); Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Apr 30, 2026 | SCHEDULE 13G | ↗ | |
| Apr 6, 2026 | ARS | KRC 2025 ANNUAL REPORT | ↗ |
| Apr 6, 2026 | DEFA14A | DEFA14A | ↗ |
| Apr 6, 2026 | DEF 14A | DEF 14A | ↗ |
| Apr 1, 2026 | 4 | ↗ | |
| Mar 27, 2026 | SCHEDULE 13G/A | ↗ | |
| Mar 9, 2026 | 4 | ↗ | |
| Mar 5, 2026 | 4 | ↗ | |
| Mar 5, 2026 | 4 | ↗ | |
| Mar 5, 2026 | 4 | ↗ | |
| Mar 5, 2026 | 4 | ↗ | |
| Mar 5, 2026 | 4 | ↗ | |
| Mar 5, 2026 | 4 | ↗ | |
| Feb 20, 2026 | 10-K | KNIFE RIVER FORM 10-K 2025 | ↗ |
| Feb 17, 2026 | 4 | ↗ | |
| Feb 17, 2026 | 4 | ↗ | |
| Feb 17, 2026 | 4 | ↗ | |
| Feb 17, 2026 | 4 | ↗ | |
| Feb 17, 2026 | 4 | ↗ | |
| Feb 17, 2026 | 4 | ↗ |