List of insiders holdings for COLUMBIA BANKING SYSTEM INC.:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | GARDNER STEVEN R Director | 2025-09-03 21:47:05 | 245,875 338,221 | 584,096 | Form 4 |
| 2 | O'HAVER CORT L Executive Chairman | 2025-03-14 21:46:30 | 290,054 0 | 290,054 | Form 4/A |
| 3 | WEYERHAEUSER WILLIAM T Director | 2019-05-24 15:42:14 | 32,188 223,249 | 255,437 | Form 4 |
| 4 | Merrywell Christopher Senior Executive VP | 2025-03-14 21:50:38 | 147,357 0 | 147,357 | Form 4/A |
| 5 | DRESSEL MELANIE J President and CEO | 2016-07-05 16:57:52 | 84,114 62,678 | 146,792 | Form 4 |
| 6 | Stein Clint President, CEO | 2025-03-04 15:46:38 | 142,961 0 | 142,961 | Form 4 |
| 7 | Nixon Torran B Senior Executive VP | 2025-03-14 21:47:49 | 138,402 0 | 138,402 | Form 4/A |
| 8 | FARNSWORTH RON L Chief Financial Officer | 2025-03-14 21:53:43 | 117,641 0 | 117,641 | Form 4/A |
| 9 | FOWLER PEGGY Y Director | 2024-05-14 17:26:20 | 8,211 67,211 | 75,422 | Form 4 |
| 10 | MATSON TOM SR Director | 2012-09-26 14:51:22 | 75,259 0 | 75,259 | Form 4 |
| 11 | HULBERT TOM Director | 2022-05-05 14:04:23 | 69,990 0 | 69,990 | Form 4/A |
| 12 | WHITNEY EVANS Q Executive Vice President | 2007-01-10 19:49:12 | 50,439 7,546 | 57,985 | Form 4 |
| 13 | BARUFFI KUMI YAMAMOTO General Counsel, Corporate Sec | 2025-03-04 16:01:28 | 54,263 0 | 54,263 | Form 4 |
| 14 | Terry Hilliard C. III Director | 2025-05-16 21:51:39 | 51,565 0 | 51,565 | Form 4 |
| 15 | McDonald Andy EVP Chief Credit Officer | 2023-03-02 19:37:45 | 49,686 0 | 49,686 | Form 4 |
| 16 | SCHULTZ JOHN F Director | 2025-05-16 21:52:01 | 49,435 0 | 49,435 | Form 4 |
| 17 | FOLSOM JOHN Director | 2019-05-24 15:24:08 | 36,779 11,550 | 48,329 | Form 4 |
| 18 | Robbins Hadley S PRESIDENT & CEO | 2020-01-03 13:42:28 | 47,943 0 | 47,943 | Form 4 |
| 19 | POPE MARIA M Director | 2025-05-16 21:53:06 | 47,569 0 | 47,569 | Form 4 |
| 20 | OGNALL ANDREW H EVP Chief Risk Officer | 2025-12-31 18:13:58 | 47,405 0 | 47,405 | Form 4 |
| 21 | MACHUCA LUIS Director | 2025-11-06 16:36:16 | 0 47,117 | 47,117 | Form 4 |
| 22 | SCHMINKEY GARY R EVP and CFO | 2012-02-24 17:42:54 | 34,920 8,138 | 43,058 | Form 4 |
| 23 | Burns Sheri Chief Human Resources Officer | 2024-03-12 17:29:55 | 42,488 0 | 42,488 | Form 4 |
| 24 | Deer Aaron James Chief Strategy/Innovation Offc | 2025-03-04 16:04:03 | 42,046 0 | 42,046 | Form 4 |
| 25 | MITCHELL M CHRISTIAN Director | 2025-09-03 21:31:11 | 37,960 0 | 37,960 | Form 4 |
| 26 | WILL JAMES M Director | 2014-06-27 14:26:46 | 36,137 1,400 | 37,537 | Form 4 |
| 27 | Numata S Mae Fujita Director | 2025-05-16 21:52:12 | 37,113 0 | 37,113 | Form 4 |
| 28 | Namdar Frank Chief Credit Officer | 2025-03-04 16:18:53 | 33,394 3,691 | 37,085 | Form 4 |
| 29 | EERKES CRAIG D Director | 2024-05-14 17:03:32 | 35,346 0 | 35,346 | Form 4 |
| 30 | Dow Lisa Chief Risk Officer | 2025-03-04 16:06:26 | 35,110 0 | 35,110 | Form 4 |
| 31 | NELSON MARK W Executive Vice President | 2013-10-02 19:52:03 | 34,217 0 | 34,217 | Form 4 |
| 32 | RUSSELL HARALD R Executive Vice President | 2004-01-07 17:59:29 | 28,208 4,803 | 33,011 | Form 4 |
| 33 | Roberts Kent Executive Vice President | 2013-07-02 17:54:37 | 23,590 9,377 | 32,967 | Form 4 |
| 34 | SEATON ELIZABETH WHITEHEAD Director | 2025-05-16 21:51:50 | 32,566 0 | 32,566 | Form 4 |
| 35 | Forrest Eric Director | 2025-05-16 21:52:44 | 32,402 0 | 32,402 | Form 4 |
| 36 | Finkelstein Mark A Director | 2025-05-16 21:52:55 | 31,605 0 | 31,605 | Form 4 |
| 37 | RODMAN DONALD Director | 2012-09-26 15:01:34 | 15,873 15,567 | 31,440 | Form 4 |
| 38 | Eid Eric J EVP Chief Digital & Tech Off | 2023-03-02 18:11:02 | 29,243 0 | 29,243 | Form 4 |
| 39 | White Lisa M PAO & Corporate Controller | 2025-03-04 16:33:44 | 29,045 0 | 29,045 | Form 4 |
| 40 | Seda Ivan A EVP, Chief Financial Officer | 2025-12-31 17:59:08 | 28,464 0 | 28,464 | Form 3 |
| 41 | Lawson David C EVP Chief H.R. Officer | 2023-03-02 18:09:36 | 28,152 0 | 28,152 | Form 4 |
| 42 | Varnado Anddria Director | 2025-05-16 21:51:28 | 26,945 0 | 26,945 | Form 4 |
| 43 | Lund Randal Lee Director | 2025-05-16 21:52:34 | 23,714 1000 | 24,714 | Form 4 |
| 44 | GOLDBERG FREDERICK M Director | 2014-06-27 14:22:34 | 19,750 4,594 | 24,344 | Form 4 |
| 45 | Anderson Drew K Chief Administrative Officer | 2025-03-04 15:55:10 | 23,342 0 | 23,342 | Form 4 |
| 46 | Moore Devine David Chief Marketing Officer | 2025-03-04 16:15:21 | 23,025 0 | 23,025 | Form 4 |
| 47 | COLUMBIA BANKING SYSTEM INC. EVP, Chief Accounting Officer | 2025-12-01 17:40:33 | 22,227 0 | 22,227 | Form 3 |
| 48 | Lakely Brock EVP, Chief Accounting Officer | 2025-12-01 20:03:41 | 22,227 0 | 22,227 | Form 3 |
| 49 | STUDENMUND JAYNIE M Director | 2025-09-03 21:41:31 | 17,858 3,843 | 21,701 | Form 4 |
| 50 | REGIS DANIEL C Director | 2014-06-27 14:33:08 | 20,500 0 | 20,500 | Form 4 |
| 51 | Giem Judi EVP CHRO | 2025-07-23 18:46:31 | 17,949 0 | 17,949 | Form 4 |
| 52 | Ray Barry SVP & CAO | 2018-03-02 18:36:49 | 13,108 0 | 13,108 | Form 4 |
| 53 | Dietzler David A Director | 2019-05-24 15:19:35 | 12,303 0 | 12,303 | Form 4 |
| 54 | Sigrist Greg EVP & CFO | 2020-03-03 18:57:57 | 8,126 0 | 8,126 | Form 4 |
| 55 | Terrano Janine Director | 2023-03-01 16:35:04 | 0 0 | 0 | Form 4 |
| 56 | Lantow Michelle Director | 2023-03-01 16:35:30 | 0 0 | 0 | Form 4 |
| 57 | Schrag Laura Alvarez Director | 2023-03-01 16:36:22 | 0 0 | 0 | Form 4 |
| 58 | Mack-Askew Tracy Director | 2023-03-01 16:34:24 | 0 0 | 0 | Form 4 |
| 59 | Elsaesser Ford Director | 2023-03-01 16:33:59 | 0 0 | 0 | Form 4 |