Christopher Merrywell - 18 Feb 2026 Form 4 Insider Report for COLUMBIA BANKING SYSTEM, INC. (COLB)

Role
Senior Executive VP
Signature
/s/ Andrea M. Newburn, Attorney-in-fact
Issuer symbol
COLB
Transactions as of
18 Feb 2026
Net transactions value
+$519,990
Form type
4
Filing time
20 Feb 2026, 19:30:12 UTC
Previous filing
18 Feb 2026
Next filing
02 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Merrywell Christopher Senior Executive VP C/O COLUMBIA BANKING SYSTEM, INC., 1301 A STREET, TACOMA /s/ Andrea M. Newburn, Attorney-in-fact 20 Feb 2026 0001796657

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction COLB Restricted Stock Unit Award $519,990 +16,645 +42% $31.24 56,304 18 Feb 2026 Common Stock 16,645 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Restricted stock units granted 02/18/2026. The grant will vest 33.33% per year over three years.