SEC Form 4 · Updated Daily
COLB
— COLUMBIA BANKING SYSTEM, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| O'HAVER CORT L | Director · Officer | 399,862 | 2025-02-28 | F |
| Stein Clint | Director · Officer | 158,735 | 2026-03-13 | M |
| FARNSWORTH RON L | Officer | 144,235 | 2025-02-28 | F |
| Nixon Torran B | Officer | 103,242 | 2026-03-13 | M |
| DRESSEL MELANIE J | Director · Officer | 84,114 | 2016-07-01 | A |
| MATSON TOM SR | Director | 75,259 | 2012-09-24 | A |
| OGNALL ANDREW H | Officer | 75,083 | 2026-03-13 | M |
| HULBERT TOM | Director | 69,990 | 2021-11-26 | P |
| Terry Hilliard C. III | Director | 55,514 | 2026-05-14 | A |
| BARUFFI KUMI YAMAMOTO | Officer | 53,715 | 2026-03-13 | F |
| WHITNEY EVANS Q | Officer | 50,439 | 2007-01-09 | P |
| SCHULTZ JOHN F | Director | 50,384 | 2026-05-14 | A |
| McDonald Andy | Officer | 49,686 | 2023-02-28 | A |
| POPE MARIA M | Director · Officer | 47,569 | 2025-05-15 | A |
| NELSON MARK W | Officer | 46,917 | 2013-09-30 | A |
| Elsaesser Ford | Director | 46,586 | 2023-02-21 | A |
| Merrywell Christopher | Officer | 46,040 | 2026-03-13 | M |
| Burns Sheri | Officer | 43,352 | 2024-03-08 | F |
| Deer Aaron James | Officer | 42,761 | 2026-06-30 | P |
| MITCHELL M CHRISTIAN | Director | 41,909 | 2026-05-14 | A |
| Numata S Mae Fujita | Director | 37,113 | 2025-05-15 | A |
| Forrest Eric | Director | 36,351 | 2026-05-14 | A |
| Finkelstein Mark A | Director | 35,554 | 2026-05-14 | A |
| WILL JAMES M | Director | 35,387 | 2014-06-25 | A |
| EERKES CRAIG D | Director | 35,346 | 2024-05-10 | A |
| Dow Lisa | Officer | 35,110 | 2025-02-28 | F |
| SCHMINKEY GARY R | Officer | 34,920 | 2012-02-22 | A |
| Namdar Frank | Officer | 33,290 | 2026-03-13 | M |
| Varnado Anddria | Director | 30,894 | 2026-05-14 | A |
| White Lisa M | Officer | 30,566 | 2025-02-28 | F |
| Roberts Kent | Officer | 30,240 | 2013-06-30 | A |
| WEYERHAEUSER WILLIAM T | Director | 30,188 | 2018-06-28 | A |
| MACHUCA LUIS | Director | 29,953 | 2026-05-14 | A |
| Robbins Hadley S | Director · Officer | 29,398 | 2019-12-31 | J |
| Eid Eric J | Officer | 29,243 | 2023-02-28 | A |
| Lawson David C | Officer | 28,152 | 2023-02-28 | A |
| Lund Randal Lee | Director | 27,663 | 2026-05-14 | A |
| Anderson Drew K | Officer | 23,184 | 2026-03-13 | M |
| Lantow Michelle | Director | 23,140 | 2023-02-21 | A |
| Moore Devine David | Officer | 22,448 | 2026-06-08 | S |
| STUDENMUND JAYNIE M | Director | 21,807 | 2026-05-14 | A |
| REGIS DANIEL C | Director | 20,500 | 2014-06-25 | A |
| GOLDBERG FREDERICK M | Director | 19,750 | 2014-06-25 | A |
| RODMAN DONALD | Director | 15,873 | 2012-09-24 | A |
| FOLSOM JOHN | Director | 13,691 | 2018-06-28 | A |
| Ray Barry | Officer | 13,108 | 2018-02-28 | A |
| Dietzler David A | Director | 12,303 | 2018-06-28 | A |
| COLUMBIA BANKING SYSTEM, INC. | Officer | 10,860 | 2025-11-20 | — |
| Lakely Brock | Officer | 10,708 | 2026-04-15 | F |
| Terrano Janine | Director | 10,474 | 2023-02-21 | A |
| FOWLER PEGGY Y | Director | 8,211 | 2024-05-10 | A |
| Sigrist Greg | Officer | 8,126 | 2020-02-28 | F |
| Schrag Laura Alvarez | Director | 4,236 | 2023-02-21 | A |
| Mack-Askew Tracy | Director | 4,236 | 2023-02-21 | A |
| SEATON ELIZABETH WHITEHEAD | Director | 3,949 | 2026-05-14 | A |
| LAGOMARSINO SIMONE | Director | 2,670 | 2026-09-02 | A |
| GARDNER STEVEN R | Director | 2,577 | 2026-09-04 | A |
| Giem Judi | Officer | 2,393 | 2026-08-14 | M |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-14 | MACHUCA LUIS | Grant / award (derivative) | 594 | $30.48 | 49,560 |
| 2026-09-04 | GARDNER STEVEN R | Grant / award | 2,577 | $0.00 | 2,577 |
| 2026-09-02 | LAGOMARSINO SIMONE | Grant / award | 2,670 | $0.00 | 2,670 |
| 2026-09-01 | LAGOMARSINO SIMONE | — | — | — | 32,931 |
| 2026-09-01 | LAGOMARSINO SIMONE | — | — | — | 7 |
| 2026-08-14 | Giem Judi | Option exercise (derivative) | 2,393 | — | 13,108 |
| 2026-08-14 | Giem Judi | Tax withholding | 643 | $32.69 | 1,750 |
| 2026-08-14 | Giem Judi | Option exercise | 2,393 | $32.69 | 2,393 |
| 2026-06-30 | Deer Aaron James | Open-market buy | 886 | $25.37 | 42,761 |
| 2026-06-15 | MACHUCA LUIS | Grant / award (derivative) | 563 | $31.78 | 48,966 |
| 2026-06-08 | Moore Devine David | Open-market sale | 3,812 | $29.77 | 18,636 |
| 2026-06-08 | Moore Devine David | Open-market sale | 60 | $29.77 | 22,448 |
| 2026-05-14 | Finkelstein Mark A | Grant / award | 3,949 | $0.00 | 35,554 |
| 2026-05-14 | Forrest Eric | Grant / award | 3,949 | $0.00 | 36,351 |
| 2026-05-14 | Lund Randal Lee | Grant / award | 3,949 | $0.00 | 27,663 |
| 2026-05-14 | MACHUCA LUIS | Grant / award | 3,949 | $0.00 | 29,953 |
| 2026-05-14 | MITCHELL M CHRISTIAN | Grant / award | 3,949 | $0.00 | 41,909 |
| 2026-05-14 | SCHULTZ JOHN F | Grant / award | 3,949 | $0.00 | 50,384 |
| 2026-05-14 | SEATON ELIZABETH WHITEHEAD | Grant / award | 3,949 | $0.00 | 3,949 |
| 2026-05-14 | STUDENMUND JAYNIE M | Grant / award | 3,949 | $0.00 | 21,807 |
| 2026-05-14 | Terry Hilliard C. III | Grant / award | 3,949 | $0.00 | 55,514 |
| 2026-05-14 | Varnado Anddria | Grant / award | 3,949 | $0.00 | 30,894 |
| 2026-04-15 | Lakely Brock | Tax withholding | 396 | $29.10 | 10,708 |
| 2026-03-16 | MACHUCA LUIS | Grant / award (derivative) | 659 | $26.83 | 48,403 |
| 2026-03-13 | Anderson Drew K | Option exercise (derivative) | 2,506 | $0.00 | 50,607 |
| 2026-03-13 | Anderson Drew K | Tax withholding | 1,215 | $26.23 | 21,969 |
| 2026-03-13 | Anderson Drew K | Option exercise | 2,506 | $26.23 | 23,184 |
| 2026-03-13 | BARUFFI KUMI YAMAMOTO | Option exercise (derivative) | 2,381 | $0.00 | 13,083 |
| 2026-03-13 | BARUFFI KUMI YAMAMOTO | Open-market sale | 937 | $26.23 | 53,715 |
| 2026-03-13 | BARUFFI KUMI YAMAMOTO | Option exercise | 2,381 | $26.23 | 54,652 |
| 2026-03-13 | Deer Aaron James | Option exercise (derivative) | 1,567 | $0.00 | 7,133 |
| 2026-03-13 | Deer Aaron James | Tax withholding | 617 | $26.23 | 41,875 |
| 2026-03-13 | Deer Aaron James | Option exercise | 1,567 | $26.23 | 42,492 |
| 2026-03-13 | Lakely Brock | Option exercise (derivative) | 846 | $0.00 | 9,810 |
| 2026-03-13 | Lakely Brock | Open-market sale | 211 | $26.23 | 11,104 |
| 2026-03-13 | Lakely Brock | Option exercise | 846 | $26.23 | 11,315 |
| 2026-03-13 | Merrywell Christopher | Option exercise (derivative) | 5,013 | $0.00 | 51,291 |
| 2026-03-13 | Merrywell Christopher | Tax withholding | 1,973 | $26.23 | 44,067 |
| 2026-03-13 | Merrywell Christopher | Option exercise | 5,013 | $26.23 | 46,040 |
| 2026-03-13 | Moore Devine David | Option exercise (derivative) | 940 | $0.00 | 4,679 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.