Business Description

Our Company Headquartered in the greater Sacramento metropolitan area of California, Five Star Bancorp is a bank holding company that operates through its wholly owned subsidiary, Five Star Bank, a California state-chartered non-member bank. The Bank began operations on December 20, 1999. Bancorp was incorporated on September 16, 2002 and became the sole shareholder of the Bank on June 2, 2003. Our executive offices are located at 3100 Zinfandel Drive, Suite 100, Rancho Cordova, California 95670 and our telephone number is (916) 626-5000. Our website address is https://www.fivestarbank.com. Information on our website should not be considered a part of this Annual Report on Form 10-K. The Company provides a broad range of banking products and services to small and medium-sized businesses, professionals, and individuals primarily in Northern California through nine branch offices. The Bank opened a full-service branch in Walnut Creek in September 2025. The Bank’s deposits are insured in whole or in part by the FDIC. The Bank’s loans and deposits are primarily within Northern California, and the Bank’s primary funding source is deposits from customers. Our mission is to strive to become the top business bank in all markets we serve through exceptional service, deep connectivity, and customer empathy. We are dedicated to serving real estate, agricultural, faith-based, and small to medium-sized enterprises. We aim to consistently deliver value that meets or exceeds expectations of our shareholders, customers, employees, business partners, and community. We refer to our mission as “purpose-driven and integrity-centered banking.” At December 31, 2025, we had total assets of $4.8 billion, total loans held for investment of $4.1 billion, and total deposits of $4.2 billion. In May 2021, the Company completed its IPO, in connection with which the Company terminated its status as a Subchapter S corporation as of May 5, 2021 and became a taxable C Corporation. Unless otherwise indicated, references in this report to “we,” “our,” “us,” “the Company,” or “Bancorp” refer to Five Star Bancorp and our consolidated subsidiary. All references to “the Bank” or “Five Star” refer to Five Star Bank, our wholly owned subsidiary. Our Market The Company, through the Bank, provides financial services to customers who are predominately small and middle-market businesses, professionals, and individuals primarily in the Northern California region. Our primary loan products are commercial real estate loans, land development loans, construction loans, and operating lines of credit and our primary deposit products are checking accounts, savings accounts, money market accounts, and term certificate accounts. Our principal geographic market is the Roseville/Sacramento/Rancho Cordova/Elk Grove area (the “Greater Sacramento Area”). The Greater Sacramento Area has a profitable and productive economy driven by the governmental, education, technology, health care, agricultural, and manufacturing sectors. Since 2016, our market share of the total deposits in the Greater Sacramento Area has increased significantly, according to the FDIC Deposit Market Share Reports. We believe that our market growth confirms the quality of the purpose-driven and integrity-centered banking that we strive to deliver to our customers. During 2025, we continued our expansion into the San Francisco Bay Area, including the opening of a full service branch in Walnut Creek in September 2025. We hired three business development officers, three loan officers, and four additional staff to support these operations during 2025 as part of our expansion. Our Products and Services Lending Activities We focus primarily on commercial lending, with an emphasis on commercial real estate. We offer a variety of loans to small and medium-sized businesses, professionals, and individuals, including commercial real estate, commercial, commercial land and construction, and farmland loans. Although a substantial portion of our loan portfolio consists of commercial real estate loans within our market, our portfolio is diverse and includes SBA loans to customers nationwide. To a lesser extent, we also offer residential real estate and construction loans and consumer loans. 3 Commercial real estate loans : As of December 31, 2025, we had $3.3 billion in total commercial real estate loans, representing 81.08% of total loans before deferred fees.…