Company / CIK 0000887343
COLUMBIA BANKING SYSTEM, INC.
- Ticker
- COLB
- Size, estimated from filings
- Mid cap ($2B – $10B)
- Insiders on file
- 24
- Members of Congress who traded it
- 2
- Federal contracts on record
- none matched
- Lobbying filings on record
- none matched
- SEC filings
- EDGAR ↗
- Latest trade on record
- September 14, 2026
COLUMBIA BANKING SYSTEM, INC. (COLB) has 24 insiders on file who disclosed 130 transactions in the last 12 months (1 open-market buy, 66 sales, about $13.9M at reported prices), and 3 congressional trades in its stock are on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name; no lobbying filing names it as client this year.
COLUMBIA BANKING SYSTEM, INC. in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
8 people account for the disclosed buying and selling in COLUMBIA BANKING SYSTEM, INC. over the last 12 months; the most active is Stein Clint with $1.6M.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| MACHUCA LUIS | Director | 7 | 0 | 0 | September 15, 2026 |
| GARDNER STEVEN R | Director | 2 | 0 | 1 | September 8, 2026 |
| LAGOMARSINO SIMONE | Director | 1 | 0 | 0 | September 4, 2026 |
| Giem Judi | EVP CHRO | 4 | 0 | 1 | August 18, 2026 |
| Deer Aaron James | EVP Chief Strategy/Innov Offcr | 11 | 1 | 6 | July 2, 2026 |
| Moore Devine David | EVP Chief Marketing Officer | 12 | 0 | 8 | June 10, 2026 |
| Finkelstein Mark A | Director | 1 | 0 | 0 | May 18, 2026 |
| Forrest Eric | Director | 1 | 0 | 0 | May 18, 2026 |
| Lund Randal Lee | Director | 1 | 0 | 0 | May 18, 2026 |
| MITCHELL M CHRISTIAN | Director | 1 | 0 | 0 | May 18, 2026 |
| SCHULTZ JOHN F | Director | 1 | 0 | 0 | May 18, 2026 |
| SEATON ELIZABETH WHITEHEAD | Director | 1 | 0 | 0 | May 18, 2026 |
| STUDENMUND JAYNIE M | Director | 1 | 0 | 0 | May 18, 2026 |
| Terry Hilliard C. III | Director | 1 | 0 | 0 | May 18, 2026 |
| Varnado Anddria | Director | 1 | 0 | 0 | May 18, 2026 |
| Lakely Brock | EVP, Chief Accounting Officer | 6 | 0 | 3 | April 16, 2026 |
| Stein Clint | Chair, President, CEO | 14 | 0 | 9 | March 17, 2026 |
| Merrywell Christopher | Senior Executive VP | 10 | 0 | 6 | March 17, 2026 |
| Nixon Torran B | Senior Executive VP | 12 | 0 | 8 | March 17, 2026 |
| Anderson Drew K | EVP Chief Admin Officer | 10 | 0 | 6 | March 17, 2026 |
| BARUFFI KUMI YAMAMOTO | EVP General Counsel, Corp Sec | 10 | 0 | 6 | March 17, 2026 |
| OGNALL ANDREW H | EVP Chief Risk Officer | 11 | 0 | 6 | March 17, 2026 |
| Namdar Frank | EVP Chief Credit Officer | 10 | 0 | 6 | March 17, 2026 |
| Seda Ivan A | EVP, Chief Financial Officer | 1 | 0 | 0 | February 20, 2026 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded COLB
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the COLB page.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Gilbert Ray Cisneros, Jr. | Representative (CA, District 31), Democrat | 2 | 1 | 1 | $16K–$65K | January 15, 2026 |
| Josh Gottheimer | Representative (NJ, District 5), Democrat | 1 | 0 | 1 | $1,001–$15K | March 5, 2026 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MACHUCA LUIS | COLB | Other A | September 14, 2026 | September 15, 2026 | 1d | 594 | $30 | $18K | indirectderivative | Form 4 ↗ | |
| GARDNER STEVEN R | COLB | Other A | September 4, 2026 | September 8, 2026 | 4d | 2,577 | — | — | Form 4 ↗ | ||
| LAGOMARSINO SIMONE | COLB | Other A | September 2, 2026 | September 4, 2026 | 2d | 2,670 | — | — | Form 4 ↗ | ||
| Giem Judi | COLB | Option / conversion M | August 14, 2026 | August 18, 2026 | 4d | 2,393 | — | — | derivative | Form 4 ↗ | |
| Giem Judi | COLB | Sell F | August 14, 2026 | August 18, 2026 | 4d | 643 | $33 | $21K | Form 4 ↗ | ||
| Giem Judi | COLB | Option / conversion M | August 14, 2026 | August 18, 2026 | 4d | 2,393 | $33 | $78K | Form 4 ↗ | ||
| Deer Aaron James | COLB | Buy P | June 30, 2026 | July 2, 2026 | 2d | 886 | $25 | $22K | Form 4 ↗ | ||
| MACHUCA LUIS | COLB | Other A | June 15, 2026 | June 16, 2026 | 1d | 563 | $32 | $18K | indirectderivative | Form 4 ↗ | |
| Moore Devine David | COLB | Sell S | June 8, 2026 | June 10, 2026 | 2d | 3,812 | $30 | $114K | Form 4 ↗ | ||
| Moore Devine David | COLB | Sell S | June 8, 2026 | June 10, 2026 | 2d | 60 | $30 | $1,786 | Form 4 ↗ | ||
| Varnado Anddria | COLB | Other A | May 14, 2026 | May 18, 2026 | 4d | 3,949 | — | — | Form 4 ↗ | ||
| Terry Hilliard C. III | COLB | Other A | May 14, 2026 | May 18, 2026 | 4d | 3,949 | — | — | Form 4 ↗ | ||
| STUDENMUND JAYNIE M | COLB | Other A | May 14, 2026 | May 18, 2026 | 4d | 3,949 | — | — | Form 4 ↗ | ||
| SEATON ELIZABETH WHITEHEAD | COLB | Other A | May 14, 2026 | May 18, 2026 | 4d | 3,949 | — | — | Form 4 ↗ | ||
| SCHULTZ JOHN F | COLB | Other A | May 14, 2026 | May 18, 2026 | 4d | 3,949 | — | — | Form 4 ↗ | ||
| MITCHELL M CHRISTIAN | COLB | Other A | May 14, 2026 | May 18, 2026 | 4d | 3,949 | — | — | Form 4 ↗ | ||
| MACHUCA LUIS | COLB | Other A | May 14, 2026 | May 18, 2026 | 4d | 3,949 | — | — | Form 4 ↗ | ||
| Lund Randal Lee | COLB | Other A | May 14, 2026 | May 18, 2026 | 4d | 3,949 | — | — | Form 4 ↗ | ||
| Forrest Eric | COLB | Other A | May 14, 2026 | May 18, 2026 | 4d | 3,949 | — | — | Form 4 ↗ | ||
| Finkelstein Mark A | COLB | Other A | May 14, 2026 | May 18, 2026 | 4d | 3,949 | — | — | Form 4 ↗ | ||
| Lakely Brock | COLB | Sell F | April 15, 2026 | April 16, 2026 | 1d | 396 | $29 | $12K | Form 4 ↗ | ||
| MACHUCA LUIS | COLB | Other A | March 16, 2026 | March 17, 2026 | 1d | 659 | $27 | $18K | indirectderivative | Form 4 ↗ | |
| Stein Clint | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 18,171 | — | — | derivative | Form 4 ↗ | |
| Stein Clint | COLB | Sell F | March 13, 2026 | March 17, 2026 | 4d | 7,151 | $26 | $188K | Form 4 ↗ | ||
| Stein Clint | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 18,171 | $26 | $477K | Form 4 ↗ | ||
| OGNALL ANDREW H | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 2,381 | — | — | derivative | Form 4 ↗ | |
| OGNALL ANDREW H | COLB | Sell F | March 13, 2026 | March 17, 2026 | 4d | 951 | $26 | $25K | Form 4 ↗ | ||
| OGNALL ANDREW H | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 2,381 | $26 | $62K | Form 4 ↗ | ||
| Nixon Torran B | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 5,013 | — | — | derivative | Form 4 ↗ | |
| Nixon Torran B | COLB | Sell F | March 13, 2026 | March 17, 2026 | 4d | 2,002 | $26 | $53K | Form 4 ↗ | ||
| Nixon Torran B | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 5,013 | $26 | $131K | Form 4 ↗ | ||
| Namdar Frank | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 2,820 | — | — | derivative | Form 4 ↗ | |
| Namdar Frank | COLB | Sell F | March 13, 2026 | March 17, 2026 | 4d | 1,367 | $26 | $36K | Form 4 ↗ | ||
| Namdar Frank | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 2,820 | $26 | $74K | Form 4 ↗ | ||
| Moore Devine David | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 940 | — | — | derivative | Form 4 ↗ | |
| Moore Devine David | COLB | Sell F | March 13, 2026 | March 17, 2026 | 4d | 376 | $26 | $9,862 | Form 4 ↗ | ||
| Moore Devine David | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 940 | $26 | $25K | Form 4 ↗ | ||
| Merrywell Christopher | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 5,013 | — | — | derivative | Form 4 ↗ | |
| Merrywell Christopher | COLB | Sell F | March 13, 2026 | March 17, 2026 | 4d | 1,973 | $26 | $52K | Form 4 ↗ | ||
| Merrywell Christopher | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 5,013 | $26 | $131K | Form 4 ↗ | ||
| Lakely Brock | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 846 | — | — | derivative | Form 4 ↗ | |
| Lakely Brock | COLB | Sell S | March 13, 2026 | March 17, 2026 | 4d | 211 | $26 | $5,535 | Form 4 ↗ | ||
| Lakely Brock | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 846 | $26 | $22K | Form 4 ↗ | ||
| Deer Aaron James | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 1,567 | — | — | derivative | Form 4 ↗ | |
| Deer Aaron James | COLB | Sell F | March 13, 2026 | March 17, 2026 | 4d | 617 | $26 | $16K | Form 4 ↗ | ||
| Deer Aaron James | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 1,567 | $26 | $41K | Form 4 ↗ | ||
| BARUFFI KUMI YAMAMOTO | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 2,381 | — | — | derivative | Form 4 ↗ | |
| BARUFFI KUMI YAMAMOTO | COLB | Sell S | March 13, 2026 | March 17, 2026 | 4d | 937 | $26 | $25K | Form 4 ↗ | ||
| BARUFFI KUMI YAMAMOTO | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 2,381 | $26 | $62K | Form 4 ↗ | ||
| Anderson Drew K | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 2,506 | — | — | derivative | Form 4 ↗ | |
| Anderson Drew K | COLB | Sell F | March 13, 2026 | March 17, 2026 | 4d | 1,215 | $26 | $32K | Form 4 ↗ | ||
| Anderson Drew K | COLB | Option / conversion M | March 13, 2026 | March 17, 2026 | 4d | 2,506 | $26 | $66K | Form 4 ↗ | ||
| Nixon Torran B | COLB | Sell S | March 4, 2026 | March 5, 2026 | 1d | 2,240 | $29 | $65K | 10b5-1 plan | Form 4 ↗ | |
| Nixon Torran B | COLB | Sell S | March 3, 2026 | March 5, 2026 | 2d | 2,241 | $28 | $63K | 10b5-1 plan | Form 4 ↗ | |
| Stein Clint | COLB | Sell F | March 1, 2026 | March 2, 2026 | 1d | 9,789 | $28 | $278K | Form 4 ↗ | ||
| OGNALL ANDREW H | COLB | Sell F | March 1, 2026 | March 2, 2026 | 1d | 1,304 | $28 | $37K | Form 4 ↗ | ||
| Nixon Torran B | COLB | Sell F | March 1, 2026 | March 2, 2026 | 1d | 2,980 | $28 | $85K | Form 4 ↗ | ||
| Namdar Frank | COLB | Sell F | March 1, 2026 | March 2, 2026 | 1d | 1,808 | $28 | $51K | Form 4 ↗ | ||
| Merrywell Christopher | COLB | Sell F | March 1, 2026 | March 2, 2026 | 1d | 3,230 | $28 | $92K | Form 4 ↗ | ||
| Lakely Brock | COLB | Sell F | March 1, 2026 | March 2, 2026 | 1d | 391 | $28 | $11K | Form 4 ↗ | ||
| Moore Devine David | COLB | Sell F | March 1, 2026 | March 2, 2026 | 1d | 838 | $28 | $24K | Form 4 ↗ | ||
| Deer Aaron James | COLB | Sell F | March 1, 2026 | March 2, 2026 | 1d | 918 | $28 | $26K | Form 4 ↗ | ||
| BARUFFI KUMI YAMAMOTO | COLB | Sell F | March 1, 2026 | March 2, 2026 | 1d | 1,799 | $28 | $51K | Form 4 ↗ | ||
| Anderson Drew K | COLB | Sell F | March 1, 2026 | March 2, 2026 | 1d | 1,808 | $28 | $51K | Form 4 ↗ | ||
| Stein Clint | COLB | Other A | February 18, 2026 | February 20, 2026 | 2d | 56,017 | $31 | $1.7M | derivative | Form 4 ↗ | |
| Seda Ivan A | COLB | Other A | February 18, 2026 | February 20, 2026 | 2d | 12,804 | $31 | $400K | derivative | Form 4 ↗ | |
| OGNALL ANDREW H | COLB | Other A | February 18, 2026 | February 20, 2026 | 2d | 8,002 | $31 | $250K | derivative | Form 4 ↗ | |
| Nixon Torran B | COLB | Other A | February 18, 2026 | February 20, 2026 | 2d | 16,645 | $31 | $520K | derivative | Form 4 ↗ | |
| Namdar Frank | COLB | Other A | February 18, 2026 | February 20, 2026 | 2d | 8,002 | $31 | $250K | derivative | Form 4 ↗ | |
| Moore Devine David | COLB | Other A | February 18, 2026 | February 20, 2026 | 2d | 2,800 | $31 | $87K | derivative | Form 4 ↗ | |
| Merrywell Christopher | COLB | Other A | February 18, 2026 | February 20, 2026 | 2d | 16,645 | $31 | $520K | derivative | Form 4 ↗ | |
| Lakely Brock | COLB | Other A | February 18, 2026 | February 20, 2026 | 2d | 5,601 | $31 | $175K | derivative | Form 4 ↗ | |
| Giem Judi | COLB | Other A | February 18, 2026 | February 20, 2026 | 2d | 8,322 | $31 | $260K | derivative | Form 4 ↗ | |
| Deer Aaron James | COLB | Other A | February 18, 2026 | February 20, 2026 | 2d | 4,001 | $31 | $125K | derivative | Form 4 ↗ | |
| BARUFFI KUMI YAMAMOTO | COLB | Other A | February 18, 2026 | February 20, 2026 | 2d | 8,322 | $31 | $260K | derivative | Form 4 ↗ | |
| Anderson Drew K | COLB | Other A | February 18, 2026 | February 20, 2026 | 2d | 8,002 | $31 | $250K | derivative | Form 4 ↗ | |
| Stein Clint | COLB | Sell F | February 15, 2026 | February 18, 2026 | 3d | 3,922 | $31 | $124K | Form 4 ↗ | ||
| OGNALL ANDREW H | COLB | Sell F | February 15, 2026 | February 18, 2026 | 3d | 931 | $31 | $29K | Form 4 ↗ | ||
| Nixon Torran B | COLB | Sell F | February 15, 2026 | February 18, 2026 | 3d | 1,905 | $31 | $60K | Form 4 ↗ | ||
| Namdar Frank | COLB | Sell F | February 15, 2026 | February 18, 2026 | 3d | 1,169 | $31 | $37K | Form 4 ↗ | ||
| Moore Devine David | COLB | Sell F | February 15, 2026 | February 18, 2026 | 3d | 485 | $31 | $15K | Form 4 ↗ | ||
| Merrywell Christopher | COLB | Sell F | February 15, 2026 | February 18, 2026 | 3d | 1,706 | $31 | $54K | Form 4 ↗ | ||
| Deer Aaron James | COLB | Sell F | February 15, 2026 | February 18, 2026 | 3d | 531 | $31 | $17K | Form 4 ↗ | ||
| BARUFFI KUMI YAMAMOTO | COLB | Sell F | February 15, 2026 | February 18, 2026 | 3d | 1,036 | $31 | $33K | Form 4 ↗ | ||
| Anderson Drew K | COLB | Sell F | February 15, 2026 | February 18, 2026 | 3d | 788 | $31 | $25K | Form 4 ↗ | ||
| MACHUCA LUIS | COLB | Other A | February 4, 2026 | February 5, 2026 | 1d | 562 | $31 | $17K | indirectderivative | Form 4 ↗ | |
| MACHUCA LUIS | COLB | Other A | December 3, 2025 | February 5, 2026 | 64d | 65 | $28 | $1,831 | lateindirectderivative | Form 4 ↗ | |
| Stein Clint | COLB | Sell F | February 2, 2026 | February 4, 2026 | 2d | 8,653 | $30 | $257K | Form 4 ↗ | ||
| Stein Clint | COLB | Other A | February 2, 2026 | February 4, 2026 | 2d | 21,988 | $30 | $653K | Form 4 ↗ | ||
| Stein Clint | COLB | Sell F | February 2, 2026 | February 4, 2026 | 2d | 11,383 | $30 | $338K | Form 4 ↗ | ||
| Stein Clint | COLB | Other A | February 2, 2026 | February 4, 2026 | 2d | 28,927 | $30 | $859K | Form 4 ↗ | ||
| OGNALL ANDREW H | COLB | Sell F | February 2, 2026 | February 4, 2026 | 2d | 1,929 | $30 | $57K | Form 4 ↗ | ||
| OGNALL ANDREW H | COLB | Other A | February 2, 2026 | February 4, 2026 | 2d | 4,510 | $30 | $134K | Form 4 ↗ | ||
| Nixon Torran B | COLB | Sell F | February 2, 2026 | February 4, 2026 | 2d | 5,528 | $30 | $164K | Form 4 ↗ | ||
| Nixon Torran B | COLB | Other A | February 2, 2026 | February 4, 2026 | 2d | 13,844 | $30 | $411K | Form 4 ↗ | ||
| Namdar Frank | COLB | Sell F | February 2, 2026 | February 4, 2026 | 2d | 2,383 | $30 | $71K | Form 4 ↗ | ||
| Namdar Frank | COLB | Other A | February 2, 2026 | February 4, 2026 | 2d | 4,667 | $30 | $139K | Form 4 ↗ | ||
| Moore Devine David | COLB | Sell F | February 2, 2026 | February 4, 2026 | 2d | 965 | $30 | $29K | Form 4 ↗ | ||
| Moore Devine David | COLB | Other A | February 2, 2026 | February 4, 2026 | 2d | 2,095 | $30 | $62K | Form 4 ↗ | ||
| Merrywell Christopher | COLB | Sell F | February 2, 2026 | February 4, 2026 | 2d | 4,949 | $30 | $147K | Form 4 ↗ | ||
| Merrywell Christopher | COLB | Other A | February 2, 2026 | February 4, 2026 | 2d | 12,576 | $30 | $373K | Form 4 ↗ | ||
| Deer Aaron James | COLB | Sell F | February 2, 2026 | February 4, 2026 | 2d | 1,191 | $30 | $35K | Form 4 ↗ | ||
| Deer Aaron James | COLB | Other A | February 2, 2026 | February 4, 2026 | 2d | 2,620 | $30 | $78K | Form 4 ↗ | ||
| BARUFFI KUMI YAMAMOTO | COLB | Sell F | February 2, 2026 | February 4, 2026 | 2d | 2,110 | $30 | $63K | Form 4 ↗ | ||
| BARUFFI KUMI YAMAMOTO | COLB | Other A | February 2, 2026 | February 4, 2026 | 2d | 5,093 | $30 | $151K | Form 4 ↗ | ||
| Anderson Drew K | COLB | Sell F | February 2, 2026 | February 4, 2026 | 2d | 1,710 | $30 | $51K | Form 4 ↗ | ||
| Anderson Drew K | COLB | Other A | February 2, 2026 | February 4, 2026 | 2d | 3,146 | $30 | $93K | Form 4 ↗ | ||
| GARDNER STEVEN R | COLB | Sell S | January 30, 2026 | February 3, 2026 | 4d | 13,725 | $29 | $404K | indirect | Form 4 ↗ | |
| Deer Aaron James | COLB | Sell F | January 20, 2026 | January 22, 2026 | 2d | 776 | $28 | $22K | Form 4 ↗ | ||
| Deer Aaron James | COLB | Sell D | January 20, 2026 | January 22, 2026 | 2d | 325 | — | — | Form 4 ↗ | ||
| Namdar Frank | COLB | Sell F | January 20, 2026 | January 22, 2026 | 2d | 1,652 | $28 | $47K | Form 4 ↗ | ||
| Namdar Frank | COLB | Sell D | January 20, 2026 | January 22, 2026 | 2d | 579 | — | — | Form 4 ↗ | ||
| Moore Devine David | COLB | Sell F | January 20, 2026 | January 22, 2026 | 2d | 628 | $28 | $18K | Form 4 ↗ | ||
| Moore Devine David | COLB | Sell D | January 20, 2026 | January 22, 2026 | 2d | 260 | — | — | Form 4 ↗ | ||
| OGNALL ANDREW H | COLB | Sell F | January 20, 2026 | January 22, 2026 | 2d | 1,353 | $28 | $38K | Form 4 ↗ | ||
| OGNALL ANDREW H | COLB | Sell D | January 20, 2026 | January 22, 2026 | 2d | 559 | — | — | Form 4 ↗ | ||
| BARUFFI KUMI YAMAMOTO | COLB | Sell F | January 20, 2026 | January 22, 2026 | 2d | 1,508 | $28 | $43K | Form 4 ↗ | ||
| BARUFFI KUMI YAMAMOTO | COLB | Sell D | January 20, 2026 | January 22, 2026 | 2d | 632 | — | — | Form 4 ↗ | ||
| Anderson Drew K | COLB | Sell F | January 20, 2026 | January 22, 2026 | 2d | 1,114 | $28 | $32K | Form 4 ↗ | ||
| Anderson Drew K | COLB | Sell D | January 20, 2026 | January 22, 2026 | 2d | 390 | — | — | Form 4 ↗ | ||
| Nixon Torran B | COLB | Sell F | January 20, 2026 | January 22, 2026 | 2d | 3,873 | $28 | $110K | Form 4 ↗ | ||
| Nixon Torran B | COLB | Sell D | January 20, 2026 | January 22, 2026 | 2d | 1,717 | — | — | Form 4 ↗ | ||
| Merrywell Christopher | COLB | Sell F | January 20, 2026 | January 22, 2026 | 2d | 3,496 | $28 | $99K | Form 4 ↗ | ||
| Merrywell Christopher | COLB | Sell D | January 20, 2026 | January 22, 2026 | 2d | 1,560 | — | — | Form 4 ↗ | ||
| Stein Clint | COLB | Sell F | January 20, 2026 | January 22, 2026 | 2d | 5,635 | $28 | $160K | Form 4 ↗ | ||
| Stein Clint | COLB | Sell D | January 20, 2026 | January 22, 2026 | 2d | 2,727 | — | — | Form 4 ↗ | ||
| Stein Clint | COLB | Sell F | January 20, 2026 | January 22, 2026 | 2d | 7,615 | $28 | $216K | Form 4 ↗ | ||
| Stein Clint | COLB | Sell D | January 20, 2026 | January 22, 2026 | 2d | 3,588 | — | — | Form 4 ↗ | ||
| OGNALL ANDREW H | COLB | Other A | December 31, 2025 | December 31, 2025 | 0d | 21,467 | $28 | $600K | derivative | Form 4 ↗ | |
| MACHUCA LUIS | COLB | Other A | November 5, 2025 | November 6, 2025 | 1d | 630 | $27 | $17K | indirectderivative | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "COLUMBIA BANKING SYSTEM, INC.". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
No LDA filing posted since October 2025 names "COLUMBIA BANKING SYSTEM, INC." as the client. Filings under a subsidiary or trade-association name are not matched — search lobbying.
Related companies
Companies whose stock was traded by the same people who traded COLB, by number of filers in common. It shows overlap in public filings and nothing else.
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- ADVANCED MICRO DEVICES INC AMD 2 filers in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 3 | 3 | November 18, 2025 | April 8, 2026 | House Clerk search |
| SEC EDGAR, Form 4 | 83 | 130 | November 6, 2025 | September 15, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.