USCB · Uscb Financial Holdings, Inc. · Debt

1. Subordinated Notes. This Subordinated Note is one of a duly authorized issue of notes of USCB Financial Holdings, Inc., a Florida corporation and registered bank holding company (the “Company”), designated as the “7.625% Fixed-to-Floating Rate Subordinated Notes due 2035” (the “Subordinated Notes”) in an aggregate principal amount of $40,000,000 and initially issued on August 14, 2025. The Company has issued this Subordinated Note under (a) that certain Indenture dated as of August 14, 2025, as the same may be amended or supplemented from time to time (“Indenture”), between the Company and Wilmington Trust, National Association, as Trustee (the “Trustee”) and (b) that certain Subordinated Note Purchase Agreement concerning the Subordinated Notes, dated August 14, 2025, by and among the Company and the purchasers identified therein (the “Purchase Agreement”). All capitalized terms not otherwise defined in this Subordinated Note will have the meanings assigned to them in the Indenture. The terms of this Subordinated Note include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended (the “Trust Indenture Act”). This Subordinated Note is subject to all such terms, and the Holder (as defined below) is referred to the Indenture and the Trust Indenture Act for a statement of such terms. To the extent any provision of this Subordinated Note irreconcilably conflicts with the express provisions of the Indenture, the provisions of the Indenture will govern and be controlling.

Issuer evidence: 1. Subordinated Notes. This Subordinated Note is one of a duly authorized issue of notes of USCB Financial Holdings, Inc., a Florida corporation and registered bank holding company (the “Company”), designated as the “7.625% Fixed-to-Floating Rate Subordinated Notes due 2035” (the “Subordinated Notes”) in an aggregate principal amount of $40,000,000 and initially issued on August 14, 2025. The Company has issued this Subordinated Note under (a) that certain Indenture dated as of August 14, 2025, as the same may be amended or supplemented from time to time (“Indenture”), between the Company and Wilmington Trust, National Association, as Trustee (the “Trustee”) and (b) that certain Subordinated Note Purchase Agreement concerning the Subordinated Notes, dated August 14, 2025, by and among the Company and the purchasers identified therein (the “Purchase Agreement”). All capitalized terms not otherwise defined in this Subordinated Note will have the meanings assigned to them in the Indenture. The terms of this Subordinated Note include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended (the “Trust Indenture Act”). This Subordinated Note is subject to all such terms, and the Holder (as defined below) is referred to the Indenture and the Trust Indenture Act for a statement of such terms. To the extent any provision of this Subordinated Note irreconcilably conflicts with the express provisions of the Indenture, the provisions of the Indenture will govern and be controlling.

Supporting evidence: 2. Payment. The Company, for value received, promises to pay to [\_] (the “Holder”), or its registered assigns, the principal sum of [\_] Dollars (U.S.) ($[\_]), plus accrued but unpaid interest on August 15, 2035 (the “Maturity Date”) and to pay interest thereon (i) from and including the original issue date of the Subordinated Notes to but excluding August 15, 2030 or the earlier redemption date contemplated by Section 5 (Redemption) of this Subordinated Note (the “Fixed Rate Period”), at the rate of 7.625% per annum, computed on the basis of a 360-day year consisting of twelve 30-day months and payable semi-annually in arrears on February 15 and August 15 of each year (each payment date, a “Fixed Interest Payment Date”), beginning February 15, 2026, and (ii) from and including August 15, 2030 to but excluding the Maturity Date or earlier redemption date contemplated by Section 5 (Redemption) of this Subordinated Note (the “Floating Rate Period”), at the rate per annum, reset quarterly, equal to the Floating Interest Rate (as defined below) determined on the Floating Interest Determination Date (as defined below) of the applicable Floating Interest Period plus 422 basis points, computed on the basis of a 360-day year and the actual number of days elapsed and payable quarterly in arrears on February 15, May 15, August 15 and November 15 of each year (each payment date, a “Floating Interest Payment Date”), beginning on November 15, 2030. A “Floating Rate Interest Period” means, the period from, and including, each Floating Interest Payment Date to, but excluding, the next succeeding Floating Interest Payment Date, except for the initial Floating Interest Period, which will be the period from and including August 15, 2030 to, but excluding the next succeeding Floating Interest Payment Date. Dollar amounts resulting from this calculation shall be rounded to the nearest cent, with one-half cent being rounded up. The term “Floating Interest Determination Date” means the date upon which the Floating Interest Rate is determined by the Calculation Agent (as defined

Supporting evidence: 1. Subordinated Notes. This Subordinated Note is one of a duly authorized issue of notes of USCB Financial Holdings, Inc., a Florida corporation and registered bank holding company (the “Company”), designated as the “7.625% Fixed-to-Floating Rate Subordinated Notes due 2035” (the “Subordinated Notes”) in an aggregate principal amount of $40,000,000 and initially issued on August 14, 2025. The Company has issued this Subordinated Note under (a) that certain Indenture dated as of August 14, 2025, as the same may be amended or supplemented from time to time (“Indenture”), between the Company and Wilmington Trust, National Association, as Trustee (the “Trustee”) and (b) that certain Subordinated Note Purchase Agreement concerning the Subordinated Notes, dated August 14, 2025, by and among the Company and the purchasers identified therein (the “Purchase Agreement”). All capitalized terms not otherwise defined in this Subordinated Note will have the meanings assigned to them in the Indenture. The terms of this Subordinated Note include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended (the “Trust Indenture Act”). This Subordinated Note is subject to all such terms, and the Holder (as defined below) is referred to the Indenture and the Trust Indenture Act for a statement of such terms. To the extent any provision of this Subordinated Note irreconcilably conflicts with the express provisions of the Indenture, the provisions of the Indenture will govern and be controlling.

1. Subordinated Notes. This Subordinated Note is one of a duly authorized issue of notes of USCB Financial Holdings, Inc., a Florida corporation and registered bank holding company (the “Company”), designated as the “7.625% Fixed-to-Floating Rate Subordinated Notes due 2035” (the “Subordinated Notes”) in an aggregate principal amount of $40,000,000 and initially issued on August 14, 2025. The Company has issued this Subordinated Note under (a) that certain Indenture dated as of August 14, 2025, as the same may be amended or supplemented from time to time (“Indenture”), between the Company and Wilmington Trust, National Association, as Trustee (t

Issuer evidence: This INDENTURE dated as of August 14, 2025 is between USCB Financial Holdings, Inc., a Florida corporation and registered bank holding company (the “*Company*”), and Wilmington Trust, National Association, a national banking association duly organized and existing under the laws of the United States of America, as trustee (the “*Trustee*”).

Supporting evidence: 1. Subordinated Notes. This Subordinated Note is one of a duly authorized issue of notes of USCB Financial Holdings, Inc., a Florida corporation and registered bank holding company (the “Company”), designated as the “7.625% Fixed-to-Floating Rate Subordinated Notes due 2035” (the “Subordinated Notes”) in an aggregate principal amount of $40,000,000 and initially issued on August 14, 2025. The Company has issued this Subordinated Note under (a) that certain Indenture dated as of August 14, 2025, as the same may be amended or supplemented from time to time (“Indenture”), between the Company and Wilmington Trust, National Association, as Trustee (t

1. Subordinated Notes. This Subordinated Note is one of a duly authorized issue of notes of USCB Financial Holdings, Inc., a Florida corporation and registered bank holding company (the “Company”), designated as the “7.625% Fixed-to-Floating Rate Subordinated Notes due 2035” (the “Subordinated Notes”) in an aggregate principal amount of $40,000,000 and initially issued on August 14, 2025. The Company has issued this Subordinated Note under (a) that certain Indenture dated as of August 14, 2025, as the same may be amended or supplemented from time to time (“Indenture”), between the Company and Wilmington Trust, National Association, as Trustee (the “Trustee”) and (b) that certain Subordinated Note Purchase Agreement concerning the Subordinated Notes, dated August 14, 2025, by and among the Company and the purchasers identified therein (the “Purchase Agreement”). All capitalized terms not otherwise defined in this Subordinated Note will have the meanings assigned to them in the Indenture. The terms of this Subordinated Note include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended (the “Trust Indenture Act”). This Subordinated Note is subject to all such terms, and the Holder (as defined below) is referred to the Indenture and the Trust Indenture Act for a statement of such terms. To the extent any provision of this Subordinated Note irreconcilably conflicts with the express provisions of the Indenture, the provisions of the Indenture will govern and be controlling.

Issuer evidence: 1. Subordinated Notes. This Subordinated Note is one of a duly authorized issue of notes of USCB Financial Holdings, Inc., a Florida corporation and registered bank holding company (the “Company”), designated as the “7.625% Fixed-to-Floating Rate Subordinated Notes due 2035” (the “Subordinated Notes”) in an aggregate principal amount of $40,000,000 and initially issued on August 14, 2025. The Company has issued this Subordinated Note under (a) that certain Indenture dated as of August 14, 2025, as the same may be amended or supplemented from time to time (“Indenture”), between the Company and Wilmington Trust, National Association, as Trustee (the “Trustee”) and (b) that certain Subordinated Note Purchase Agreement concerning the Subordinated Notes, dated August 14, 2025, by and among the Company and the purchasers identified therein (the “Purchase Agreement”). All capitalized terms not otherwise defined in this Subordinated Note will have the meanings assigned to them in the Indenture. The terms of this Subordinated Note include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended (the “Trust Indenture Act”). This Subordinated Note is subject to all such terms, and the Holder (as defined below) is referred to the Indenture and the Trust Indenture Act for a statement of such terms. To the extent any provision of this Subordinated Note irreconcilably conflicts with the express provisions of the Indenture, the provisions of the Indenture will govern and be controlling.