BARUFFI KUMI YAMAMOTO (CIK 1619728) reported 13 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-03-20). Recent activity: Sell COLB (937 shares), Buy COLB (2,381 shares), Sell COLB (937 shares), Sell COLB (1,799 shares), Sell COLB (1,036 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-20 | COLUMBIA BANKING SYSTEM, INC. (COLB) | EVP General Counsel, Corp Sec | Sell | 937 | $24,578 |
| 2026-03-17 | COLUMBIA BANKING SYSTEM, INC. (COLB) | EVP General Counsel, Corp Sec | Buy | 2,381 | $62,454 |
| 2026-03-17 | COLUMBIA BANKING SYSTEM, INC. (COLB) | EVP General Counsel, Corp Sec | Sell | 937 | $24,578 |
| 2026-03-02 | COLUMBIA BANKING SYSTEM, INC. (COLB) | EVP General Counsel, Corp Sec | Sell | 1,799 | $51,182 |
| 2026-02-18 | COLUMBIA BANKING SYSTEM, INC. (COLB) | EVP General Counsel, Corp Sec | Sell | 1,036 | $32,624 |
| 2026-02-04 | COLUMBIA BANKING SYSTEM, INC. (COLB) | EVP General Counsel, Corp Sec | Buy | 5,093 | $151,211 |
| 2026-02-04 | COLUMBIA BANKING SYSTEM, INC. (COLB) | EVP General Counsel, Corp Sec | Sell | 2,110 | $62,646 |
| 2026-01-22 | COLUMBIA BANKING SYSTEM, INC. (COLB) | EVP General Counsel, Corp Sec | Sell | 632 | $0 |
| 2026-01-22 | COLUMBIA BANKING SYSTEM, INC. (COLB) | EVP General Counsel, Corp Sec | Sell | 1,508 | $42,752 |
| 2025-03-04 | COLUMBIA BANKING SYSTEM, INC. (COLB) | General Counsel, Corporate Sec | Sell | 1,799 | $48,087 |
| 2025-02-18 | COLUMBIA BANKING SYSTEM, INC. (COLB) | General Counsel, Corporate Sec | Buy | 1,012 | $27,739 |
| 2025-02-18 | COLUMBIA BANKING SYSTEM, INC. (COLB) | General Counsel, Corporate Sec | Sell | 442 | $12,115 |
| 2025-02-18 | COLUMBIA BANKING SYSTEM, INC. (COLB) | General Counsel, Corporate Sec | Sell | 1,031 | $28,260 |
Source: SEC Form 4 filings · as of 2026-03-20