X0508 4 2024-05-15 0001901637 USCB FINANCIAL HOLDINGS, INC. USCB 0001685230 Anderson Robert B. C/O USCB FINANCIAL HOLDINGS, INC. 2301 N.W. 87TH AVENUE DORAL FL 33172 1 Executive VP and CFO 0 Class A Voting Common Stock 2024-05-15 4 P 0 5000 12.13 A 79408 D Class A Voting Common Stock 2024-05-16 4 P 0 525 12.15 A 79933 D Options to Purchase Class A Voting Common Stock 8.7500 2021-09-10 2030-09-10 Class A Voting Common Stock 30000 30000 D Options to Purchase Class A Voting 12.0500 2022-09-27 2031-09-27 Class A Voting Common Stock 60000 60000 D The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $11.96 to $12.14, inclusive. The reporting person undertakes to provide to USCB Financial Holdings, Inc. ("USCB"), any securities holder of USCB, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. Includes 4,127 shares of restricted stock which vest at a rate of one-third per year commencing on the first anniversary of the date of grant, which was 1/22/2024, and 5,367 shares of restricted stock which vest at a rate of one-third per year commencing on the first anniversary of the date of grant, which was 3/8/2023. The options vested at a rate of one-third per year commencing on the first anniversary of the date of grant, which was 9/10/2020. The options vest at a rate of one-third per year commencing on the first anniversary of the date of grant, which was 9/27/2021. /s/ Robert Anderson 2024-05-17