Ring Nathan W (CIK 1596125) reported 3 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-03-05). Recent activity: Buy KNF (5,211 shares), Sell KNF (1,922 shares), Sell KNF (4,336 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-05 | Knife River Corp (KNF) | Vice President & CFO | Buy | 5,211 | $0 |
| 2026-02-17 | Knife River Corp (KNF) | Vice President & CFO | Sell | 1,922 | $157,104 |
| 2026-02-17 | Knife River Corp (KNF) | Vice President & CFO | Sell | 4,336 | $354,425 |
来源：SEC Form 4 申报文件 · 截至 2026-03-05