X0609 4 2026-09-28 0 0001046050 TIMBERLAND BANCORP INC TSBK 0001972440 Antich Breanne D false 624 SIMPSON AVENUE HOQUIAM WA 98550 0 1 0 0 Chief Technology Officer/EVP 0 Common Stock, $.01 par value 2026-09-28 4 F 0 44 45.41 D 3683 D Common Stock, $.01 par value 2026-09-29 4 A 0 1900 0 A 5583 D Common Stock, $.01 par value 4174 I By KSOP As previously reported 200 shares of restricted stock vested on September 26, 2026, of which 44 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. Restricted Stock Award was granted on 9/29/2026. These shares will vest equally over 5 years. Represents shares held in the Timberland Bank Employee Stock Ownership and 401(k) Plan ("KSOP"). /s/Cheryl Parks, Power of Attorney for Breanne D. Antich 2026-09-30