X0508 4 2025-05-21 0001901637 USCB FINANCIAL HOLDINGS, INC. USCB 0001916660 DE LA AGUILERA LUIS C/O USCB FINANCIAL HOLDINGS, INC. 2301 N.W. 87TH AVENUE DORAL FL 33172 1 1 President and CEO 0 Class A Voting Common Stock 2025-05-21 4 M 0 5000 7.50 A 243974 D Class A Voting Common Stock 2025-05-21 4 S 0 5000 16.94 D 238974 D Class A Voting Common Stock 2025-05-22 4 M 0 25000 7.50 A 263974 D Class A Voting Common Stock 2025-05-22 4 S 0 25000 16.70 D 238974 D Stock Option (Right to Buy) 7.50 2025-05-21 4 M 0 5000 0 D 2017-04-01 2026-04-01 Common Stock 40000 35000 D Stock Option (Right to Buy) 7.50 2025-05-22 4 M 0 25000 0 D 2017-04-01 2026-04-01 Common Stock 35000 10000 D Stock Option (Right to Buy) 11.3500 2020-09-23 2029-09-23 Common Stock 40000 40000 D Stock Option (Right to Buy) 12.0500 2022-09-27 2031-09-27 Common Stock 160000 160000 D Includes a grant of 25,653 shares of restricted stock which vest at a rate of one-third per year commencing on January 21, 2026, 8,090 shares of unvested restricted stock from a grant of 12,136 shares which commenced vesting at a rate of one-third per year on January 22, 2025, 7,892 shares of unvested restricted stock from a grant of 23,678 shares which commenced vesting at a rate of one-third per year on March 8, 2024, and 125,000 shares of restricted stock one-third of which vested on December 31, 2024 and the remaining two-thirds vest pro rata on December 31, 2025 and 2026. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.81 to $17.00, inclusive. The reporting person undertakes to provide to USCB, any security holder of USCB, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (3). The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.56 to $16.85, inclusive. The stock options vested at the rate of 25% per year commencing on April 1, 2017. The stock options vested at the rate of one-third per year commencing on September 23, 2020. The stock options vested at the rate of one-third per year commencing on September 27, 2022. /s/ Robert Anderson by P.O.A. for Luis de la Aguilera 2025-05-23