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 -$30K (SEC Form 4). Over the last 6 months, 369 institutions increased and 355 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
2
Net (3m)
-$30.1K
Insider trades by month Buys Sells
Mar
Feb
Mar
Context3-month price +5.4%Institutions mixed (13F)
DateInsiderTypeSharesPrice
May 18, 2026MACHUCA LUISdirectorGrant3,949
May 18, 2026STUDENMUND JAYNIE MdirectorGrant3,949
May 18, 2026Terry Hilliard C. IIIdirectorGrant3,949
May 18, 2026Finkelstein Mark AdirectorGrant3,949
May 18, 2026Forrest EricdirectorGrant3,949
May 18, 2026SEATON ELIZABETH WHITEHEADdirectorGrant3,949
May 18, 2026Varnado AnddriadirectorGrant3,949
May 18, 2026SCHULTZ JOHN FdirectorGrant3,949
May 18, 2026Lund Randal LeedirectorGrant3,949
May 18, 2026MITCHELL M CHRISTIANdirectorGrant3,949
Apr 16, 2026Lakely Brockofficer: EVP, Chief Accounting OfficerTax396$29.10
Mar 20, 2026BARUFFI KUMI YAMAMOTOofficer: EVP General Counsel, Corp SecTax937$26.23
Mar 20, 2026Lakely Brockofficer: EVP, Chief Accounting OfficerTax211$26.23
Mar 17, 2026Nixon Torran Bofficer: Senior Executive VPOption5,013$26.23
Mar 17, 2026Moore Devine Davidofficer: EVP Chief Marketing OfficerTax376$26.23
Mar 17, 2026MACHUCA LUISdirectorGrant659
Mar 17, 2026OGNALL ANDREW Hofficer: EVP Chief Risk OfficerTax951$26.23
Mar 17, 2026Lakely Brockofficer: EVP, Chief Accounting OfficerSell211$26.23
Mar 17, 2026BARUFFI KUMI YAMAMOTOofficer: EVP General Counsel, Corp SecOption2,381$26.23
Mar 17, 2026Stein Clintdirector, officer: Chair, CEO, PresidentOption18,171$26.23
Mar 17, 2026Stein Clintdirector, officer: Chair, CEO, PresidentTax7,151$26.23
Mar 17, 2026BARUFFI KUMI YAMAMOTOofficer: EVP General Counsel, Corp SecSell937$26.23
Mar 17, 2026Deer Aaron Jamesofficer: EVP Chief Strategy/Innov OffcrTax617$26.23
Mar 17, 2026Moore Devine Davidofficer: EVP Chief Marketing OfficerOption940$26.23
Mar 17, 2026Namdar Frankofficer: EVP Chief Credit OfficerOption2,820$26.23
Mar 17, 2026Namdar Frankofficer: EVP Chief Credit OfficerTax1,367$26.23
Mar 17, 2026Anderson Drew Kofficer: EVP Chief Admin OfficerTax1,215$26.23
Mar 17, 2026Merrywell Christopherofficer: Senior Executive VPOption5,013$26.23
Mar 17, 2026Merrywell Christopherofficer: Senior Executive VPTax1,973$26.23
Mar 17, 2026Nixon Torran Bofficer: Senior Executive VPTax2,002$26.23

Source: COLB SEC Form 4 filings, latest May 18, 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
369
New positions
141
Reduced
355
Sold out
89
Largest moves
InstitutionActionSharesFiled
VANGUARD GROUP INCReduced29.7MJan 29, 2026
BLACKROCK, INC.Increased27.1MMay 13, 2026
BLACKROCK, INC.Reduced26.7MFeb 12, 2026
WELLINGTON MANAGEMENT GROUP LLPIncreased18.1MFeb 17, 2026
T. ROWE PRICE INVESTMENT MANAGEMENT, INC.Increased15.9MMay 15, 2026
T. ROWE PRICE INVESTMENT MANAGEMENT, INC.Reduced15.8MFeb 19, 2026
WELLINGTON MANAGEMENT GROUP LLPReduced14.9MMay 15, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position14.3MMay 8, 2026
DIMENSIONAL FUND ADVISORS LPIncreased13.5MMay 7, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position13.2MMay 15, 2026
DIMENSIONAL FUND ADVISORS LPIncreased13.1MFeb 12, 2026
STATE STREET CORPReduced12.8MFeb 13, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INCIncreased12.6MFeb 13, 2026
STATE STREET CORPReduced12.5MMay 15, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INCReduced10.4MMay 15, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.