Derivative exercise or conversion — not an open-market buy.
Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell
View the official recordSEC Form 4 — Statement of Changes in Beneficial OwnershipAll the details
Dates, kept separate
Transaction date
Mar 13, 2026
Reporting period
Not applicable
Filed with the SEC
Mar 18, 2026
CEOOption exercise
Context
Classification
option exercise
Code M — exercise or conversion of a derivative security
Planned / mechanical clue
Footnote references vesting of compensation awards
Only flagged when a footnote says so; never inferred
Source receipt
Record ID
0001550429-26-000002
Filed / recorded
Mar 18, 2026, 12:48 AM UTC
Added to OQRO
Oct 6, 2026, 7:14 PM UTC
Parser
form4-xml-v2
Data quality
Verified: identifiers matched exactly
Issuer
COLUMBIA BANKING SYSTEM, INC.
Issuer CIK
887343
Ticker
COLB
Reporting person
Clint Stein
Relationship
Director, Officer
Officer title
Chair, CEO, President
Security
Restricted Stock Unit
Table
Derivative (Table II)
Transaction date
Mar 13, 2026
Transaction code
M
Shares / units
18,171
Price per share
$0.00
Acquired / disposed
Disposed (D)
Shares owned after
166,984
Ownership form
Direct
Amendment
No
Footnotes from the filing
Restricted Stock Units convert into common stock on a one-for-one basis. On February 25, 2025, the reporting person was granted 54,511 Restricted Stock Units, which vest in three annual installments beginning on March 13, 2026.