X0306 4 2022-05-19 1 0001275168 FIVE STAR BANCORP FSBC 0001240780 CAMPBELL MICHAEL D C/O FIVE STAR BANCORP 3100 ZINFANDEL DRIVE, SUITE 100 RANCHO CORDOVA CA 95670 1 0 0 0 Common Stock 2022-05-19 4 A 0 1438 0 A 279336 I By self as trustee Common Stock 2022-05-19 4 D 0 737 0 D 278599 I By self as trustee Granted pursuant to the Five Star Bancorp 2021 Equity Incentive Plan. Represents shares previously granted to Mr. Campbell, which were forfeited upon his retirement, effective May 19, 2022. Shares are held by the Campbell Family Trust dated December 21, 2021, for which Mr. Campbell serves as a trustee. This filing constitutes a Form 4 exit filing for Michael D. Campbell, the reporting person, as he is no longer subject to Section 16 of the Securities Exchange Act of 1934, as amended. /s/ Michael D. Campbell, by Heather C. Luck, Attorney-in-Fact 2022-05-20