Updated Jul 16, 2026 · Last SEC filing 2026-07-01
Knife River Corp (KNF) has filed 7 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-01. 3 Form 8-K material event filings were reported by KNF in the last 90 days. InsiderAlpha tracks every KNF SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0001955520 |
|---|
| Form 4 filings (90d) | 7 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Latest Form 4 filing | 2026-07-01 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Carmona-Alvarez German | Director | A — Grant or award | 2.0K | $0.00 | — | SEC | |
| SANDBROOK WILLIAM J | Director | A — Grant or award | 2.0K | $0.00 | — | SEC | |
| MOSS PATRICIA L | Director | A — Grant or award | 2.0K | $0.00 | — | SEC | |
| Hill Thomas W. | Director | A — Grant or award | 2.0K | $0.00 | — | SEC | |
| Fagg Karen B | Director | A — Grant or award | 2.4K | $0.00 | — | SEC | |
| Chiodo Patricia | Director | A — Grant or award | 2.0K | $0.00 | — | SEC | |
| Gray Brian R. | President & CEO | A — Grant or award | 21.0K | $0.00 | — | SEC | |
| Pladsen Glenn R. | VP & Chief Excellence Officer | A — Grant or award | 3.0K | $0.00 | — | SEC | |
| Ring Nathan W | Vice President & CFO | A — Grant or award | 5.2K | $0.00 | — | SEC | |
| Liepitz Karl A | VP, Chief Legal Officer & Sec. | A — Grant or award | 4.6K | $0.00 | — | SEC | |
| Kadrmas Marney L. | VP & Chief Accounting Officer | A — Grant or award | 1.2K | $0.00 | — | SEC | |
| LaChapelle Sarah L. | VP & Chief People Officer | A — Grant or award | 2.7K | $0.00 | — | SEC | |
| Hastings Trevor J | Vice President & COO | A — Grant or award | 6.1K | $0.00 | — | SEC | |
| Ring Nathan W | Vice President & CFO | F — Tax withholding / forfeiture | 1.9K | $81.74 | $157K | SEC | |
| Liepitz Karl A | VP, Chief Legal Officer & Sec. | F — Tax withholding / forfeiture | 8.6K | $81.74 | $707K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Knife River Corp (KNF). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Fagg Karen B | 2 | $18K |
| SANDBROOK WILLIAM J | 1 | — |
| MOSS PATRICIA L | 1 | — |
| Hill Thomas W. | 1 | — |
| Chiodo Patricia | 1 | — |
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in KNF insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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