Columbia Banking System (COLB) Form 3 — Director Declares No Holdings

Rhea-AI Filing Summary

Columbia Banking System, Inc. (COLB) filed an Initial Statement on Form 3 for reporting person Jaynie M. Studenmund, indicating her relationship to the issuer as a Director. The filing states no securities are beneficially owned by the reporting person. The form was executed by an attorney-in-fact on 09/03/2025 and records the triggering event date as 08/31/2025.

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SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

STUDENMUND JAYNIE M

(Last) (First) (Middle)

C/O COLUMBIA BANKING SYSTEM, INC.

1301 A STREET

(Street)

TACOMA WA 98402

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
08/31/2025

3. Issuer Name and Ticker or Trading Symbol
COLUMBIA BANKING SYSTEM, INC. [ COLB ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit 24 - Power of Attorney

No securities are beneficially owned.

	/s/ Lisa M. White, Attorney-in-fact	09/03/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What does the COLB Form 3 filed for Jaynie Studenmund report?

The Form 3 reports that Jaynie M. Studenmund is a Director of Columbia Banking System, Inc. (COLB) and that she beneficially owns no securities of the issuer.

What dates are listed on the COLB Form 3 for Jaynie Studenmund?

The event requiring the statement is dated 08/31/2025, and the form was signed by the attorney-in-fact on 09/03/2025.

Was the Form 3 filed jointly or by one reporting person for COLB?

The filing indicates a Form filed by One Reporting Person, not a joint filing.

Does the Form 3 include any securities holdings or derivative positions for COLB?

No. The filing explicitly states: No securities are beneficially owned, and no derivative positions are reported.

Who signed the Form 3 for Jaynie Studenmund on behalf of the reporting person?

The form was executed by /s/ Lisa M. White, Attorney-in-fact on 09/03/2025.