Columbia Banking System, Inc. (COLB) Insider Trading
Over the last 3 months, COLB insiders made 0 open-market buys and 2 sales, a net sale of -$115K (SEC Form 4). Over the last 6 months, 355 institutions increased and 361 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
2
Net (3m)
-$115.3K
Insider trades by month Buys Sells
Mar
Feb
Mar
Jun
Context3-month price +16.8%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 16, 2026 | MACHUCA LUISdirector | Grant | 563 | — |
| Jun 10, 2026 | Moore Devine Davidofficer: EVP Chief Marketing Officer | Sell | 3,812 | $29.77 |
| Jun 10, 2026 | Moore Devine Davidofficer: EVP Chief Marketing Officer | Sell | 60 | $29.77 |
| May 18, 2026 | MITCHELL M CHRISTIANdirector | Grant | 3,949 | — |
| May 18, 2026 | MACHUCA LUISdirector | Grant | 3,949 | — |
| May 18, 2026 | Terry Hilliard C. IIIdirector | Grant | 3,949 | — |
| May 18, 2026 | Lund Randal Leedirector | Grant | 3,949 | — |
| May 18, 2026 | SCHULTZ JOHN Fdirector | Grant | 3,949 | — |
| May 18, 2026 | Forrest Ericdirector | Grant | 3,949 | — |
| May 18, 2026 | Finkelstein Mark Adirector | Grant | 3,949 | — |
| May 18, 2026 | Varnado Anddriadirector | Grant | 3,949 | — |
| May 18, 2026 | STUDENMUND JAYNIE Mdirector | Grant | 3,949 | — |
| May 18, 2026 | SEATON ELIZABETH WHITEHEADdirector | Grant | 3,949 | — |
| Apr 16, 2026 | Lakely Brockofficer: EVP, Chief Accounting Officer | Tax | 396 | $29.10 |
| Mar 20, 2026 | BARUFFI KUMI YAMAMOTOofficer: EVP General Counsel, Corp Sec | Tax | 937 | $26.23 |
| Mar 20, 2026 | Lakely Brockofficer: EVP, Chief Accounting Officer | Tax | 211 | $26.23 |
| Mar 17, 2026 | OGNALL ANDREW Hofficer: EVP Chief Risk Officer | Tax | 951 | $26.23 |
| Mar 17, 2026 | Merrywell Christopherofficer: Senior Executive VP | Option | 5,013 | $26.23 |
| Mar 17, 2026 | Stein Clintdirector, officer: Chair, CEO, President | Tax | 7,151 | $26.23 |
| Mar 17, 2026 | Deer Aaron Jamesofficer: EVP Chief Strategy/Innov Offcr | Tax | 617 | $26.23 |
| Mar 17, 2026 | Nixon Torran Bofficer: Senior Executive VP | Tax | 2,002 | $26.23 |
| Mar 17, 2026 | Anderson Drew Kofficer: EVP Chief Admin Officer | Option | 2,506 | $26.23 |
| Mar 17, 2026 | Nixon Torran Bofficer: Senior Executive VP | Option | 5,013 | $26.23 |
| Mar 17, 2026 | Namdar Frankofficer: EVP Chief Credit Officer | Tax | 1,367 | $26.23 |
| Mar 17, 2026 | Moore Devine Davidofficer: EVP Chief Marketing Officer | Tax | 376 | $26.23 |
| Mar 17, 2026 | Anderson Drew Kofficer: EVP Chief Admin Officer | Tax | 1,215 | $26.23 |
| Mar 17, 2026 | BARUFFI KUMI YAMAMOTOofficer: EVP General Counsel, Corp Sec | Option | 2,381 | $26.23 |
| Mar 17, 2026 | OGNALL ANDREW Hofficer: EVP Chief Risk Officer | Option | 2,381 | $26.23 |
| Mar 17, 2026 | MACHUCA LUISdirector | Grant | 659 | — |
| Mar 17, 2026 | Merrywell Christopherofficer: Senior Executive VP | Tax | 1,973 | $26.23 |
Source: COLB SEC Form 4 filings, latest Jun 16, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their COLB positions over the last 6 months (SEC Form 13F).
Increased
355
New positions
148
Reduced
361
Sold out
89
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| VANGUARD GROUP INC | Reduced | 29.7M | Jan 29, 2026 |
| BLACKROCK, INC. | Increased | 27.1M | May 13, 2026 |
| BLACKROCK, INC. | Reduced | 26.7M | Feb 12, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 26.4M | May 15, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 18.1M | Feb 17, 2026 |
| T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | Reduced | 15.9M | May 15, 2026 |
| T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | Reduced | 15.8M | Feb 19, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 14.9M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 14.3M | May 8, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Increased | 13.5M | May 7, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Increased | 13.1M | Feb 12, 2026 |
| STATE STREET CORP | Reduced | 12.8M | Feb 13, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 12.6M | Feb 13, 2026 |
| STATE STREET CORP | Reduced | 12.5M | May 15, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Reduced | 10.4M | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.