Five Star Bancorp Appoints Chief External Affairs Officer; CFO to Oversee Operations

What Happened
Five Star Bancorp (FSBC) filed a Form 8-K reporting that, effective September 14, 2026, Lydia Ramirez was appointed to the newly created role of Executive Vice President and Chief External Affairs Officer. Ramirez previously served as Executive Vice President and Chief Operating Officer. In connection with that transition, Heather Luck, Executive Vice President and Chief Financial Officer, will assume oversight of the Company’s Operations function in addition to her existing CFO duties. The company furnished a press release dated September 14, 2026 (Exhibit 99.1).

Key Details

• Effective date: September 14, 2026.
• Lydia Ramirez moved from EVP & Chief Operating Officer to EVP & Chief External Affairs Officer.
• Heather Luck (EVP & CFO) will add responsibility for Operations oversight; she will continue as CFO.
• No change to Heather Luck’s compensation as of the 8-K filing; no arrangements, family relationships, or reportable transactions requiring additional disclosure were noted (per the company’s March 30, 2026 Proxy Statement, incorporated by reference).

Why It Matters
Executive role changes can affect how a bank runs operations and communicates externally. This update signals internal reorganization rather than a departure: Ramirez remains with the company in a senior external affairs role while operational oversight is consolidated under the CFO. For investors, key takeaways are continuity of leadership, no immediate compensation changes for the CFO, and a press release (Exhibit 99.1) that the company furnished for further details.