Torran B. Nixon - 13 Mar 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
13 Mar 2026
Net transactions value
$0
Form type
4
Filing time
17 Mar 2026, 20:43:18 UTC
Previous filing
05 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Nixon Torran B Senior Executive VP C/O COLUMBIA BANKING SYSTEM, INC., 1301 A STREET, TACOMA /s/ Andrea M. Newburn, Attorney-in-fact 17 Mar 2026 0001689701

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction COLB Common Stock Options Exercise +5,013 +5.1% $26.23* 103,242 13 Mar 2026 Direct
transaction COLB Common Stock Tax liability -2,002 -1.9% $26.23* 101,240 13 Mar 2026 Direct
holding COLB Common Stock 3,650 13 Mar 2026 by family trust
holding COLB Common Stock 1,910 13 Mar 2026 by 401(k)

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 Options Exercise -5,013 -9.3% $0.000000* 49,052 13 Mar 2026 Common Stock 5,013 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 convert into common stock on a one-for-one basis. On February 25, 2025, the reporting person was granted 15,037 Restricted Stock Units, which vest in three annual installments beginning on March 13, 2026.