Stein Clint (CIK 1550429) reported 16 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-03-17). Recent activity: Buy COLB (18,171 shares), Sell COLB (7,151 shares), Sell COLB (9,789 shares), Sell COLB (3,922 shares), Buy COLB (28,927 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-17 | COLUMBIA BANKING SYSTEM, INC. (COLB) | Chair, CEO, President | Buy | 18,171 | $476,625 |
| 2026-03-17 | COLUMBIA BANKING SYSTEM, INC. (COLB) | Chair, CEO, President | Sell | 7,151 | $187,571 |
| 2026-03-02 | COLUMBIA BANKING SYSTEM, INC. (COLB) | Chair, President, CEO | Sell | 9,789 | $278,497 |
| 2026-02-18 | COLUMBIA BANKING SYSTEM, INC. (COLB) | Chair, President, CEO | Sell | 3,922 | $123,504 |
| 2026-02-04 | COLUMBIA BANKING SYSTEM, INC. (COLB) | Chair, President, CEO | Buy | 28,927 | $858,843 |
| 2026-02-04 | COLUMBIA BANKING SYSTEM, INC. (COLB) | Chair, President, CEO | Sell | 11,383 | $337,961 |
| 2026-02-04 | COLUMBIA BANKING SYSTEM, INC. (COLB) | Chair, President, CEO | Buy | 21,988 | $652,824 |
| 2026-02-04 | COLUMBIA BANKING SYSTEM, INC. (COLB) | Chair, President, CEO | Sell | 8,653 | $256,908 |
| 2026-01-22 | COLUMBIA BANKING SYSTEM, INC. (COLB) | Chair, President, CEO | Sell | 3,588 | $0 |
| 2026-01-22 | COLUMBIA BANKING SYSTEM, INC. (COLB) | Chair, President, CEO | Sell | 7,615 | $215,885 |
| 2026-01-22 | COLUMBIA BANKING SYSTEM, INC. (COLB) | Chair, President, CEO | Sell | 2,727 | $0 |
| 2026-01-22 | COLUMBIA BANKING SYSTEM, INC. (COLB) | Chair, President, CEO | Sell | 5,635 | $159,752 |
| 2025-03-04 | COLUMBIA BANKING SYSTEM, INC. (COLB) | President, CEO | Sell | 9,789 | $261,660 |
| 2025-02-18 | COLUMBIA BANKING SYSTEM, INC. (COLB) | President, CEO | Buy | 4,759 | $130,444 |
| 2025-02-18 | COLUMBIA BANKING SYSTEM, INC. (COLB) | President, CEO | Sell | 1,873 | $51,339 |
| 2025-02-18 | COLUMBIA BANKING SYSTEM, INC. (COLB) | President, CEO | Sell | 3,922 | $107,502 |
Source: SEC Form 4 filings · as of 2026-03-17