14 insiders reported 40 Form 4 transactions for Knife River Corp (KNF) over the past 18 months (most recent 2026-05-21). Recent activity: MOSS PATRICIA L (Director) Buy 2,040 shares, Hill Thomas W. (Director) Buy 2,040 shares, Chiodo Patricia (Director) Buy 2,040 shares, SANDBROOK WILLIAM J (Director) Buy 2,040 shares, Carmona-Alvarez German (Director) Buy 2,040 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-21 | MOSS PATRICIA L | Director | Buy | 2,040 | $0 |
| 2026-05-21 | Hill Thomas W. | Director | Buy | 2,040 | $0 |
| 2026-05-21 | Chiodo Patricia | Director | Buy | 2,040 | $0 |
| 2026-05-21 | SANDBROOK WILLIAM J | Director | Buy | 2,040 | $0 |
| 2026-05-21 | Carmona-Alvarez German | Director | Buy | 2,040 | $0 |
| 2026-05-21 | Fagg Karen B | Director | Buy | 2,380 | $0 |
| 2026-03-09 | Gray Brian R. | President & CEO | Buy | 20,955 | $0 |
| 2026-03-05 | Ring Nathan W | Vice President & CFO | Buy | 5,211 | $0 |
| 2026-03-05 | Liepitz Karl A | VP, Chief Legal Officer & Sec. | Buy | 4,611 | $0 |
| 2026-03-05 | LaChapelle Sarah L. | VP & Chief People Officer | Buy | 2,713 | $0 |
| 2026-03-05 | Pladsen Glenn R. | VP & Chief Excellence Officer | Buy | 2,950 | $0 |
| 2026-03-05 | Kadrmas Marney L. | VP & Chief Accounting Officer | Buy | 1,199 | $0 |
| 2026-03-05 | Hastings Trevor J | Vice President & COO | Buy | 6,130 | $0 |
| 2026-02-17 | Gray Brian R. | President & CEO | Sell | 10,072 | $823,285 |
| 2026-02-17 | Gray Brian R. | President & CEO | Sell | 19,572 | $1.6M |
| 2026-02-17 | Kadrmas Marney L. | VP & Chief Accounting Officer | Sell | 1,232 | $100,704 |
| 2026-02-17 | Liepitz Karl A | VP, Chief Legal Officer & Sec. | Sell | 8,648 | $706,888 |
| 2026-02-17 | Hastings Trevor J | Vice President & COO | Sell | 2,880 | $235,411 |
| 2026-02-17 | Hastings Trevor J | Vice President & COO | Sell | 4,599 | $375,922 |
| 2026-02-17 | Pladsen Glenn R. | VP & Chief Excellence Officer | Sell | 1,569 | $128,250 |
| 2026-02-17 | Ring Nathan W | Vice President & CFO | Sell | 1,922 | $157,104 |
| 2026-02-17 | Ring Nathan W | Vice President & CFO | Sell | 4,336 | $354,425 |
| 2026-02-17 | Pladsen Glenn R. | VP & Chief Excellence Officer | Sell | 1,385 | $113,210 |
| 2025-05-27 | Carmona-Alvarez German | Director | Buy | 1,551 | $0 |
| 2025-05-27 | MOSS PATRICIA L | Director | Buy | 1,551 | $0 |
Source: SEC Form 4 filings · as of 2026-05-21