Jaynie M. Studenmund - Aug 31, 2025 Form 3 Insider Report for COLUMBIA BANKING SYSTEM, INC. (COLB)

Role
Director
Signature
/s/ Lisa M. White, Attorney-in-fact
Stock symbol
COLB
Transactions as of
Aug 31, 2025
Transactions value $
$0
Form type
3
Date filed
9/3/2025, 07:49 PM
Previous filing
May 6, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
STUDENMUND JAYNIE M Director C/O COLUMBIA BANKING SYSTEM, INC., 1301 A STREET, TACOMA /s/ Lisa M. White, Attorney-in-fact 2025-09-03 0001222385

No securities are beneficially owned.

Remarks:

Exhibit 24 - Power of Attorney