Ivan A. Seda - 18 Feb 2026 Form 4 Insider Report for COLUMBIA BANKING SYSTEM, INC. (COLB)

Role
EVP, Chief Financial Officer
Signature
/s/ Andrea M. Newburn, Attorney-in-fact
Issuer symbol
COLB
Transactions as of
18 Feb 2026
Net transactions value
+$399,997
Form type
4
Filing time
20 Feb 2026, 19:45:11 UTC
Previous filing
31 Dec 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Seda Ivan A EVP, Chief Financial Officer C/O COLUMBIA BANKING SYSTEM, INC., 1301 A STREET, TACOMA /s/ Andrea M. Newburn, Attorney-in-fact 20 Feb 2026 0002099171

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 $399,997 +12,804 $31.24 12,804 18 Feb 2026 Common Stock 12,804 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.