Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * DE LA AGUILERA LUIS 2. Issuer Name and Ticker or Trading Symbol USCB FINANCIAL HOLDINGS, INC. [USCB] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) C/O USCB FINANCIAL HOLDINGS, INC., 2301 N.W. 87TH AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 05/05/2026 (Street) DORAL, FL 33172 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Voting Common Stock 05/05/2026 M 16,895 A $11.35 259,840(1) D Class A Voting Common Stock 05/05/2026 S 16,895 D $18.12(2) 242,945(1) D Class A Voting Common Stock 05/06/2026 M 13,100 A $11.35 256,045(1) D Class A Voting Common Stock 05/06/2026 S 13,100 D $18.16(3) 242,945(1) D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Stock Option (Right to Buy)

$11.35

05/05/2026

M

16,895

09/23/2020(4)

09/23/2029

Common Stock

40,000

$ 0

23,105

D

Stock Option (Right to Buy)

$11.35

05/06/2026

M

13,100

09/23/2020(4)

09/23/2029

Common Stock

13,100

$ 0

10,005

D

Stock Option (Right to Buy)

$12.05

09/27/2022(5)

09/27/2031

Common Stock

160,000

160,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
DE LA AGUILERA LUIS C/O USCB FINANCIAL HOLDINGS, INC. 2301 N.W. 87TH AVENUE DORAL, FL 33172	X		President and CEO

Signatures

/s/ Robert Anderson by P.O.A. for Luis de la Aguilera		05/07/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	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.
(2)	The price reported in column 4 is a weighted price. These shares were sold in multiple transactions at prices ranging from $18.05 to $18.25, 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.
(3)	The price reported in column 4 is a weighted price. These shares were sold in multiple transactions at prices ranging from $18.06 to $18.40, 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.
(4)	The stock options vested at the rate of one-third per year commencing on September 23, 2020.
(5)	The stock options vested at the rate of one-third per year commencing on September 27, 2022.

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