SCHEDULE 13D/A 0001104659-22-001814 0001583223 XXXXXXXX LIVE 3 Class A Common Stock, Par Value $1.00 Per Share 12/11/2025 false 0001901637 90355N101 USCB FINANCIAL HOLDINGS, INC.

2301 NW 87TH AVENUE 2301 NW 87TH AVENUE DORAL FL 33172

W. Kirk Wycoff 215-399-4650 Four Radnor Corporate Center Suite 210 Radnor PA 19087 Philip Ross Bevan, Esq. 202-295-4500 3299 K Street, N.W. Suite 100 Washington DC 20007 Kenneth B. Tabach, Esq. 202-295-4500 3299 K Street, N.W. Suite 100 Washington DC 20007 0001583223 N Patriot Financial Partners II, L.P. a OO N DE 0.00 1662420.00 0.00 1662420.00 1662420.00 N 9.2 PN 0001586224 N Patriot Financial Partners Parallel II, L.P. a OO N DE 0.00 193866.00 0.00 193866.00 193866.00 N 1.1 PN 0002061817 N Patriot Financial Partners GP II, L.P. a OO N DE 0.00 1856286.00 0.00 1856286.00 1856286.00 N 10.2 PN 0000949197 N WYCOFF W KIRK a OO N X1 11500.00 1856286.00 11500.00 1856286.00 1867786.00 N 10.3 IN 0001203115 N LUBERT IRA M a OO N X1 0.00 1856286.00 0.00 1856286.00 1856286.00 N 10.2 IN 0001222379 N LYNCH JAMES J a OO N X1 0.00 1856286.00 0.00 1856286.00 1856286.00 N 10.2 IN 0002061814 N Patriot Financial Partners GP II, LLC a OO N 0.00 1856286.00 0.00 1856286.00 1856286.00 N 10.2 OO 0001561111 N Deutsch James F. a OO N X1 0.00 1856286.00 0.00 1856286.00 1856286.00 N 10.2 IN Class A Common Stock, Par Value $1.00 Per Share USCB FINANCIAL HOLDINGS, INC. 2301 NW 87TH AVENUE 2301 NW 87TH AVENUE DORAL FL 33172 INTRODUCTION This Amendment No. 3 to Schedule 13D ("Amendment No. 3") is being filed to amend and supplement the statement on Schedule 13D relating to Class A Voting Common Stock, par value $1.00 per share (the "Class A Common Stock"), of USCB Financial Holdings, Inc. (the "Issuer" or the "Company") as filed with the Securities and Exchange Commission (the "SEC") on January 6, 2022 (the "Schedule 13D"). Amendment No. 1 as filed with the SEC on September 4, 2025 ("Amendment No. 1") and Amendment No. 2 filed with the SEC on September 17, 2025 ("Amendment No. 2"). All capitalized terms not otherwise defined herein shall have the meaning ascribed to the terms in the Initial Schedule 13D. Patriot Financial Group II beneficially owns in the aggregate 1,867,786 shares of Class A Common Stock or 10.3% of the outstanding shares. Patriot Fund II beneficially owns 1,662,420 shares of Class A Common Stock or 9.2% of the outstanding shares, with the shared power to vote and dispose the 1,662,420 shares and no sole power to vote and dispose the shares. Patriot Parallel Fund II beneficially owns 193,866 shares of Class A Common Stock or 1.1% of the outstanding shares, with the shared power to vote and dispose the 193,866 shares and no sole power to vote and dispose the shares. Each of Patriot GP II, Patriot II LLC and Messrs. Lubert, Lynch and Deutsch beneficially owns 1,856,286 shares of Class A Common Stock or 10.2% of the outstanding shares, with the shared power to vote and dispose the 1,856,286 shares and no sole power to vote and dispose the shares. W. Kirk Wycoff beneficially owns 1,867,786 shares of Class A Common Stock or 10.3% of the outstanding shares, with the shared power to vote and dispose 1,856,286 shares and the sole power to vote and dispose 11,500 shares, which represent options granted to Mr. Wycoff as a director of the Company. Each of Patriot II GP, Patriot II LLC and Messrs. Wycoff, Lubert, Lynch and Deutsch disclaims beneficial ownership of the shares owned by the Patriot Funds, except to the extent of its or their pecuniary interest therein. During the last 60 days, the Patriot Funds sold in the open market: 21,327 shares of Class A Voting Common Stock on November 24, 2025 at a weighted average price of $18.02 per share (at prices ranging from $17.99 to $18.18, inclusive); 22,558 shares of Class A Voting Common Stock on November 25, 2025 at a weighted average price of $18.06 per share (at prices ranging from $18.00 to $18.21, inclusive); 14,695 shares of Class A Voting Common Stock on December 2, 2025 at a weighted average price of $17.75 per share (at prices ranging from$17.60 to $18.01, inclusive); 82,043 shares of Class A Voting Common Stock on December 10, 2025 at a weighted average price of $18.56 per share (at prices ranging from $18.50 to $18.91, inclusive); and 39,000 shares of Class A Voting Common Stock on December 11, 2025 at a weighted average price of $18.68 per share (at prices ranging from $18.50 to $18.83, inclusive). Other than the Patriot Financial Group II, no other person has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities of the Company referred to in this Item 5. Not applicable. The calculations for percentage of outstanding shares are based on 18,110,385 shares of Class A Common Stock outstanding as of October 31, 2025 according to the Company's Quarterly Report on Form 10Q for the three months ended September 30, 2025. Patriot Financial Partners II, L.P. /s/ W. Kirk Wycoff 12/12/2025 Patriot Financial Partners Parallel II, L.P. /s/ W. Kirk Wycoff 12/12/2025 Patriot Financial Partners GP II, L.P. /s/ W. Kirk Wycoff 12/12/2025 WYCOFF W KIRK /s/ W. Kirk Wycoff 12/12/2025 LUBERT IRA M /s/ James J. Murphy by P.O.A. for Ira M. Lubert 12/12/2025 LYNCH JAMES J /s/ James J. Lynch 12/12/2025 Patriot Financial Partners GP II, LLC /s/ W. Kirk Wycoff 12/12/2025 Deutsch James F. /s/ James F. Deutsch 12/12/2025