X0609 4 2026-05-15 0001901637 USCB FINANCIAL HOLDINGS, INC. USCB 0001916660 DE LA AGUILERA LUIS false 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 2026-05-15 4 M 0 805 12.05 A 243750 D Class A Voting Common Stock 2026-05-15 4 S 0 805 18.05 D 242945 D Class A Voting Common Stock 2026-05-18 4 M 0 2485 12.05 A 245430 D Class A Voting Common Stock 2026-05-18 4 S 0 2485 18.06 D 242945 D Stock Option (Right to Buy) 12.05 2026-05-15 4 M 0 805 0 D 2022-09-27 2031-09-27 Common Stock 805 111086 D Stock Option (Right to Buy) 12.05 2026-05-18 4 M 0 2485 0 D 2022-09-27 2031-09-27 Common Stock 2485 108601 D Includes the grant of 27,632 shares of restricted stock which vest at a rate of one-third per year commencing on January 27, 2027, 17,102 shares of restricted stock from a grant of 25,653 shares which commenced vesting at a rate of one-third per year on January 21, 2026, 4,045 shares of restricted stock from a grant of 12,136 shares which commenced vesting at a rate of one-third per year on January 22, 2025, and 41,666 shares of restricted stock from a grant of 125,000 shares which commenced vesting at a rate of one-third per year on December 31, 2024. The price reported in column 4 is a weighted price. These shares were sold in multiple transactions at prices ranging from $18.02 to $18.19, inclusive. The reporting person undertakes to provide to USCB, or 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 range set forth in this footnote. The price reported in column 4 is a weighted price. These shares were sold in multiple transactions at prices ranging from $18.00 to $18.17, inclusive. The reporting person undertakes to provide to USCB, or 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 range set forth in this footnote. 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 2026-05-19