Timberland Bancorp grants risk chief 1,250 shares

The 1,250 restricted shares are scheduled to vest equally over five years.

Rhea-AI Filing Summary

Timberland Bancorp Inc. Chief Risk Officer/EVP Matthew Douglas Seath acquired 1,250 shares through a restricted stock award granted on September 29, 2026. On September 28, 2026, 42 shares were withheld from 140 restricted shares that vested on September 26, at Seath’s election, for the issuer to pay state and federal tax authorities for his account. He also held 2,155 shares indirectly through the Timberland Bank Employee Stock Ownership and 401(k) Plan (KSOP).

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Seath Matthew Douglas

Role Chief Risk Officer/EVP

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, $.01 par value F2	1,250	$0.00	$0.00
Tax Withholding	Common Stock, $.01 par value F1	42	$45.41	$2K
holding	Common Stock, $.01 par value F3	--	--	--

Holdings After Transaction: Common Stock, $.01 par value — 4,228 shares (Direct); Common Stock, $.01 par value — 2,155 shares (Indirect, By KSOP)

Footnotes (3)

1. F1. As previously reported 140 shares of restricted stock vested on September 26, 2026, of which 42 shares were withheld at the election of the Reporting Person for Issuer to pay the value of the vested shares to state and federal tax authorities for the Reporting Person's account.
2. F2. Restricted Stock Award was granted on 9/29/2026. These shares will vest equally over 5 years.
3. F3. Represents shares held in the Timberland Bank Employee Stock Ownership and 401(k) Plan ("KSOP").

Key Figures

Restricted stock award: 1,250 shares Vesting period: 5 years Restricted shares vested: 140 shares +3 more

6 metrics

Restricted stock award 1,250 shares Granted September 29, 2026

Vesting period 5 years The award shares vest equally over this period

Restricted shares vested 140 shares Vested September 26, 2026

Shares withheld for taxes 42 shares Withheld September 28, 2026

Transaction price $45.41 per share Tax-withholding transaction

Shares held through KSOP 2,155 shares Indirect holding reported September 28, 2026

Key Terms

Restricted Stock Award, vest equally over 5 years, KSOP

3 terms

Restricted Stock Award financial

"Restricted Stock Award was granted"

A restricted stock award is company shares given to an employee or executive that cannot be sold or fully owned until certain conditions—like staying with the company for a set time or hitting performance targets—are met. Think of it as a gift that only becomes yours after you fulfill specific obligations; for investors, these awards matter because they can increase the total shares outstanding when they vest, reveal how management is being paid and motivated, and create potential selling pressure when restrictions lift.

vest equally over 5 years financial

"These shares will vest equally over 5 years."

KSOP financial

"Timberland Bank Employee Stock Ownership and 401(k) Plan ("KSOP")"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many shares did TSBK’s Chief Risk Officer receive?

Matthew Douglas Seath acquired 1,250 shares through a restricted stock award granted on September 29, 2026. The shares are scheduled to vest equally over five years.

How many TSBK shares were withheld for taxes?

On September 28, 2026, 42 shares were withheld from the 140 restricted shares that vested on September 26, 2026, at Matthew Douglas Seath’s election, for the issuer to pay state and federal tax authorities for his account.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/30/2026 - 03:39 PM Accepted by SEC EDGAR 09/30/2026 - 03:39 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Seath Matthew Douglas

(Last) (First) (Middle)

624 SIMPSON AVENUE

(Street)

HOQUIAM WASHINGTON 98550

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
TIMBERLAND BANCORP INC [ TSBK ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Risk Officer/EVP

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/28/2026

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

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

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, $.01 par value(1)	09/28/2026		F		42	D	$45.41	2,978	D
Common Stock, $.01 par value(2)	09/29/2026		A		1,250	A	$0	4,228	D
Common Stock, $.01 par value								2,155	I	By KSOP(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. As previously reported 140 shares of restricted stock vested on September 26, 2026, of which 42 shares were withheld at the election of the Reporting Person for Issuer to pay the value of the vested shares to state and federal tax authorities for the Reporting Person's account.

2. Restricted Stock Award was granted on 9/29/2026. These shares will vest equally over 5 years.

3. Represents shares held in the Timberland Bank Employee Stock Ownership and 401(k) Plan ("KSOP").

	/s/Cheryl Parks, Power of Attorney for Matthew D. Seath	09/30/2026
	** 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 4 (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.
* Form 4: SEC 1474 (03-26)