| Lastest Insider Transactions Of COLUMBIA BANKING SYSTEM, INC. ( COLB ) |
| Symbol | Company Name | Insider Name | Title | Date | Transation | Share | Price | Amount | File Date |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Giem Judi | EVP CHRO | 2026-08-14 | Option Exercise | 2,393 | 32.69 | 78,227 | 2026-08-18 16:50:51 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Deer Aaron James | EVP Chief Strategy/Innov Offcr | 2026-06-30 | Buy | 886 | 25.37 | 22,478 | 2026-07-02 17:17:10 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Moore Devine David | EVP Chief Marketing Officer | 2026-06-08 | Sell | 3,872 | 29.77 | 115,289 | 2026-06-10 16:52:47 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Stein Clint | Chair, CEO, President | 2026-03-13 | Option Exercise | 18,171 | 26.23 | 476,625 | 2026-03-17 20:48:47 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | OGNALL ANDREW H | EVP Chief Risk Officer | 2026-03-13 | Option Exercise | 2,381 | 26.23 | 62,454 | 2026-03-17 20:45:59 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Nixon Torran B | Senior Executive VP | 2026-03-13 | Option Exercise | 5,013 | 26.23 | 131,491 | 2026-03-17 20:43:18 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Namdar Frank | EVP Chief Credit Officer | 2026-03-13 | Option Exercise | 2,820 | 26.23 | 73,969 | 2026-03-17 20:39:19 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Moore Devine David | EVP Chief Marketing Officer | 2026-03-13 | Option Exercise | 940 | 26.23 | 24,656 | 2026-03-17 20:35:17 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Merrywell Christopher | Senior Executive VP | 2026-03-13 | Option Exercise | 5,013 | 26.23 | 131,491 | 2026-03-17 20:33:52 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Lakely Brock | EVP, Chief Accounting Officer | 2026-03-13 | Sell | 211 | 26.23 | 5,535 | 2026-03-17 20:31:01 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Lakely Brock | EVP, Chief Accounting Officer | 2026-03-13 | Option Exercise | 846 | 26.23 | 22,191 | 2026-03-17 20:31:01 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Deer Aaron James | EVP Chief Strategy/Innov Offcr | 2026-03-13 | Option Exercise | 1,567 | 26.23 | 41,102 | 2026-03-17 20:27:37 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | BARUFFI KUMI YAMAMOTO | EVP General Counsel, Corp Sec | 2026-03-13 | Sell | 937 | 26.23 | 24,578 | 2026-03-17 20:26:13 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | BARUFFI KUMI YAMAMOTO | EVP General Counsel, Corp Sec | 2026-03-13 | Option Exercise | 2,381 | 26.23 | 62,454 | 2026-03-17 20:26:13 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Anderson Drew K | EVP Chief Admin Officer | 2026-03-13 | Option Exercise | 2,506 | 26.23 | 65,732 | 2026-03-17 20:24:10 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Nixon Torran B | Senior Executive VP | 2026-03-03 | Sell | 4,481 | 28.55 | 127,932 | 2026-03-05 16:27:54 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | GARDNER STEVEN R | Directior | 2026-01-30 | Sell | 13,725 | 29.43 | 403,927 | 2026-02-03 17:13:20 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Nixon Torran B | Senior Executive VP | 2025-03-04 | Sell | 4,481 | 25.99 | 116,461 | 2025-03-05 18:10:58 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | SEATON ELIZABETH WHITEHEAD | Directior | 2024-02-06 | Buy | 2,685 | 18.48 | 49,619 | 2024-02-07 18:21:01 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Lund Randal Lee | Directior | 2024-02-01 | Buy | 1,000 | 19.29 | 19,288 | 2024-02-02 21:22:44 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | MACHUCA LUIS | Directior | 2024-01-31 | Buy | 4,889 | 20.58 | 100,638 | 2024-02-01 19:01:59 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Deer Aaron James | Chief Strategy/Innovation Offc | 2024-02-01 | Buy | 2,000 | 19.32 | 38,648 | 2024-02-01 15:30:13 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Nixon Torran B | Senior Executive VP | 2024-01-31 | Buy | 3,650 | 20.49 | 74,802 | 2024-02-01 15:25:28 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | EERKES CRAIG D | Directior | 2024-01-30 | Buy | 2,141 | 20.82 | 44,579 | 2024-01-31 21:12:06 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Merrywell Christopher | Senior Executive VP | 2024-01-30 | Buy | 5,000 | 21.09 | 105,450 | 2024-01-31 13:20:13 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Merrywell Christopher | Senior Executive VP | 2024-01-30 | Buy | 5,000 | 21.09 | 105,450 | 2024-01-31 13:20:13 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Stein Clint | President, CEO | 2024-01-30 | Buy | 9,500 | 20.96 | 199,112 | 2024-01-30 21:58:42 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Numata S Mae Fujita | Directior | 2024-01-30 | Buy | 2,400 | 21.09 | 50,608 | 2024-01-30 21:51:02 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Finkelstein Mark A | Directior | 2024-01-30 | Buy | 3,592 | 20.87 | 74,965 | 2024-01-30 19:40:09 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Forrest Eric | Directior | 2024-01-29 | Buy | 4,750 | 20.89 | 99,245 | 2024-01-30 19:28:09 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | FARNSWORTH RON L | Chief Financial Officer | 2024-01-29 | Buy | 2,500 | 20.71 | 51,775 | 2024-01-30 15:31:52 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | SCHULTZ JOHN F | Directior | 2024-01-29 | Buy | 8,559 | 20.39 | 174,561 | 2024-01-30 15:12:13 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | BARUFFI KUMI YAMAMOTO | General Counsel, Corporate Sec | 2023-06-30 | Buy | 854 | 18.25 | 15,586 | 2023-07-05 16:53:28 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Deer Aaron James | Chief Strategy/Innovation Offc | 2023-06-30 | Buy | 854 | 18.25 | 15,586 | 2023-07-05 15:58:28 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | EERKES CRAIG D | Directior | 2023-05-24 | Buy | 2,381 | 21.01 | 50,025 | 2023-05-24 13:10:38 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | BARUFFI KUMI YAMAMOTO | EVP General Counsel | 2022-12-30 | Buy | 232 | 26.84 | 6,227 | 2023-01-04 14:30:46 |
| COLB | COLUMBIA BANKING SYSTEM, INC. | Lawson David C | EVP Chief H.R. Officer | 2022-12-30 | Buy | 264 | 26.84 | 7,086 | 2023-01-04 14:30:26 |
