FIVE STAR BANCORP 8-KCurrent Reports (8-K / ad hoc)

Changes / Accountants

Item 9.01 Financial Statements and Exhibits (d) Exhibits Number Description 99.1 Press Release dated October 13 , 2026 104 Cover Page Interactive Data File (embedded within the Inline XBRL) SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. FIVE STAR BANCORP By: /s/ Heather C. Luck Name: Heather C. Luck Title: Executive Vice President and Chief Financial Officer Date: October 14, 2026