Form 8-K

8-K — Atlantic Union Bankshares Corp

Accession: 0001104659-26-088743

Filed: 2026-07-30

Period: 2026-07-30

CIK: 0000883948

SIC: 6022 (STATE COMMERCIAL BANKS)

Item: Entry into a Material Definitive Agreement

Item: Financial Statements and Exhibits

Documents

8-K — tm2621600d1_8k.htm (Primary)

EX-4.2 — EXHIBIT 4.2 (tm2621600d1_ex4-2.htm)

EX-5.1 — EXHIBIT 5.1 (tm2621600d1_ex5-1.htm)

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United States

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities

Exchange Act of 1934

Date of Report (Date of earliest event reported):

July 30, 2026

ATLANTIC

UNION BANKSHARES CORPORATION

(Exact name of registrant as specified in its

charter)

Virginia

001-39325

54-1598552

(State or other jurisdiction

(Commission

(I.R.S. Employer

of incorporation)

File Number) Identification No.)

4300

Cox Road

Glen

Allen, Virginia 23060

(Address of principal executive offices, including

Zip Code)

Registrant’s telephone number, including

area code: (804) 633-5031

Check the appropriate box below if the Form 8-K filing is intended

to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2.

below):

¨ Written

communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting

material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement

communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement

communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title

of each class

Trading

Symbol(s)

Name

of each exchange on which registered

Common

Stock, par value $1.33 per share

AUB

New

York Stock Exchange

Depositary

Shares, Each Representing a 1/400th Interest in a Share of 6.875% Perpetual Non-Cumulative Preferred Stock, Series A

AUB.PRA

New

York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth

company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange

Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use

the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section

13(a) of the Exchange Act.

Item 1.01 Entry into a Material Definitive Agreement.

On July 30, 2026, Atlantic Union Bankshares Corporation

(the “Company”) completed an underwritten public offering (the “Offering”) of $250 million in aggregate principal

amount of its 6.25% Fixed-to-Floating Rate Subordinated Notes due 2036 (the “Notes”). The Notes were issued pursuant to the

Subordinated Indenture, dated as of December 5, 2016 (the “Base Indenture”), between the Company and U.S. Bank Trust Company,

National Association, as trustee (the “Trustee”), as supplemented by the Third Supplemental Indenture, dated as of July 30,

2026 (the “Supplemental Indenture”), between the Company and the Trustee. The Base Indenture, as amended and supplemented

by the Supplemental Indenture, governs the terms of the Notes and provides that the Notes are unsecured, subordinated debt obligations

of the Company and will mature on August 1, 2036. From and including July 30, 2026, to, but excluding August 1, 2031, or the date of earlier

redemption, the Notes will bear interest at a fixed rate of 6.25% per annum, payable semi-annually in arrears. From and including August

1, 2031, to, but excluding August 1, 2036 or the date of earlier redemption, the Notes will bear interest at an annual floating rate equal

to the Three-Month Term Secured Overnight Financing Rate, or SOFR (as defined in the Notes), or such other benchmark rate, plus a spread

of 213 basis points for each quarterly interest period during the floating rate period, payable quarterly in arrears.

On August 1, 2031 or any date thereafter, the

Company may, at its option, redeem the Notes, in whole or in part, at a redemption price equal to 100% of par, plus accrued and unpaid

interest to, but excluding, the date of redemption. The Company may redeem the Notes at any time, including prior to August 1, 2031, at

the Company’s option, in whole, but not in part, subject to obtaining the prior approval of the Federal Reserve Board to the extent

such approval is then required under applicable laws or regulations, including capital regulations, if (i) a change or prospective change

in law occurs that could prevent the Company from deducting interest payable on the Notes for U.S. federal income tax purposes, (ii) a

subsequent event occurs that could preclude the Notes from being recognized as Tier 2 capital for regulatory capital purposes, or (iii)

the Company is required to register as an investment company pursuant to the Investment Company Act of 1940, as amended, in each case,

at a redemption price equal to 100% of the principal amount of the Notes plus any accrued and unpaid interest to, but excluding, the redemption

date.

The foregoing summaries of the Base Indenture,

the Supplemental Indenture and the Notes are not complete, and are each qualified in their entirety by reference to the complete text

of the Base Indenture, the Supplemental Indenture and the form of Note, which are filed as Exhibits 4.1, 4.2 and 4.3, respectively, to

this Current Report on Form 8-K and incorporated herein by reference in their entirety. Troutman Pepper Locke LLP provided the Company

with the legal opinion attached hereto as Exhibit 5.1 regarding the legality of the Notes.

The Company is filing this Current Report on Form

8-K to file with the Securities and Exchange Commission certain items related to the Offering of the Notes that are to be incorporated

by reference into its Registration Statement on Form S-3ASR (File No. 333-281290).

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number

Description

4.1 Subordinated Indenture, dated as of December 5, 2016, between Union Bankshares Corporation and U.S. Bank Trust Company, National Association

(successor to U.S. Bank National Association), as Trustee (incorporated by reference to Exhibit 4.1 to Current Report on Form 8-K filed

on December 5, 2016).

4.2 Third Supplemental Indenture, dated as of July 30, 2026, between Atlantic Union Bankshares Corporation and U.S. Bank Trust Company,

National Association, as Trustee (including the form of Note attached as an exhibit thereto).

4.3 Form of 6.25% Fixed-to-Floating Subordinated Note due 2036 (included in Exhibit 4.2)

5.1 Opinion of Troutman Pepper Locke LLP, counsel to Atlantic Union Bankshares Corporation, as to the legality of the Notes.

23.1 Consent of Troutman Pepper Locke LLP (included in Exhibit 5.1)

104

Cover Page Interactive Data File – the cover page iXBRL tags are embedded within the Inline XBRL document

Forward-Looking Statements

This report and certain other communications by

the Company contain statements that constitute “forward-looking statements” within the meaning of, and subject to the protections

of, Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Such statements, including but not

limited to those regarding the offering and the use of proceeds therefrom, are based on currently available information and are subject

to various risks and uncertainties that could cause actual results to differ materially from the Company’s present expectations.

These risks and uncertainties include, but are not limited to, market conditions affecting the Offering. Undue reliance should not be

placed on such forward-looking statements, as such statements speak only as of the date on which they are made and the Company undertakes

no obligation to update such statements. Additional information regarding these and other risks is contained in the Company’s filings

with the SEC.

SIGNATURES

Pursuant to the requirements of the Securities

Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

ATLANTIC UNION BANKSHARES CORPORATION

Date: July 30, 2026

By:

/s/ Alexander D. Dodd

Alexander D. Dodd

Executive Vice President and

Chief Financial Officer

EX-4.2 — EXHIBIT 4.2

EX-4.2

Filename: tm2621600d1_ex4-2.htm · Sequence: 2

Exhibit 4.2

ATLANTIC UNION BANKSHARES CORPORATION

THIRD SUPPLEMENTAL INDENTURE

dated as of July 30,

2026

to the Indenture

dated as of December 5,

2016

6.25% Fixed-to-Floating Rate Subordinated Notes

due August 1, 2036

U.S.

Bank Trust Company, National Association, as Trustee

Table of Contents

Page

Article 1

SCOPE OF THIRD SUPPLEMENTAL INDENTURE

Section 1.01

Scope

Article 2

DEFINITIONS

Section 2.01

Definitions and Other Provisions of General Application

Article 3

FORM AND TERMS OF THE

2036 Notes

Section 3.01

Establishment of the Series; Designation, and Form of

the 2036 Notes

Section 3.02

Maturity

Section 3.03

Payment; Appointment of Agents

Section 3.04

Global Notes

Section 3.05

Interest

Section 3.06

Subordination

Section 3.07

No Sinking Fund

Section 3.08

No Conversion or Exchange Rights

Section 3.09

Events of Default; Acceleration

Section 3.10

Defeasance

Section 3.11

No Collateral

Article 4

REDEMPTION OF THE 2036 Notes

Section 4.01

Optional Redemption

Section 4.02

Redemption Upon Special Events

Section 4.03

Notice of Redemption.  Soley with respect

to the 2036 Notes, the first paragraph of Section 11.04 of the Base Indenture is hereby amended and restated as follows:

Section 4.04

Applicability of Base Indenture

Article 5

ISSUE OF 2036 Notes

Section 5.01

Original Issue of 2036 Notes

Section 5.02

Additional Issues of Notes

Article 6

SUPPLEMENTAL INDENTURES

Section 6.01

Supplemental Indentures

Article 7

MISCELLANEOUS

Section 7.01

Trust Indenture Act

Section 7.02

Governing Law; Waiver of Jury Trial

Section 7.03

Duplicate Originals

Section 7.04

Severability

Section 7.05

Ratification

Section 7.06

Effectiveness

Section 7.07

Successors

Section 7.08

Indenture and 2036 Notes Solely Corporate Obligations

Section 7.09

Trustee’s Disclaimer

THIRD SUPPLEMENTAL INDENTURE

THIS

THIRD SUPPLEMENTAL INDENTURE (“Third Supplemental Indenture”), dated as of July 30, 2026, between Atlantic

Union Bankshares Corporation (formerly known as Union Bankshares Corporation), a Virginia corporation (the “Company”),

and U.S. Bank Trust Company, National Association (as successor to U.S. Bank National Association), a national banking association, not

in its individual capacity but solely as trustee (“Trustee”).

WHEREAS,

the Company and the Trustee have executed and delivered a Subordinated Indenture, dated as of December 5, 2016 (the “Base

Indenture” and as supplemented by this Third Supplemental Indenture, the “Indenture”), to provide for the

issuance from time to time by the Company of its unsecured subordinated indebtedness to be issued in one or more series as provided in

the Indenture;

WHEREAS,

the issuance and sale of a new series of Securities of the Company designated as its 6.25% Fixed-to-Floating Rate Subordinated Notes

due August 1, 2036 (the “2036 Notes”) have been authorized by resolutions adopted by the Board of Directors of

the Company;

WHEREAS,

the Company desires to execute this Third Supplemental Indenture to establish the terms of the 2036 Notes;

WHEREAS,

all things necessary to make this Third Supplemental Indenture a legal and binding supplement to the Base Indenture in accordance with

its terms and the terms of the Base Indenture have been done;

WHEREAS,

all conditions precedent provided for in the Base Indenture relating to the execution of this Third Supplemental Indenture have been

satisfied; and

WHEREAS,

the Company has requested that the Trustee execute and deliver this Third Supplemental Indenture.

NOW,

THEREFORE, for and in consideration of the premises stated herein and the purchase of the 2036 Notes by the Holders thereof,

the Company and the Trustee covenant and agree, for the equal and proportionate benefit of the Holders of the 2036 Notes, as follows:

Article 1

SCOPE

OF THIRD SUPPLEMENTAL INDENTURE

Section 1.01         Scope.

This Third Supplemental Indenture constitutes a supplement to the Base Indenture and an integral part of the Indenture and shall be read

together with the Base Indenture as though all the provisions thereof are contained in one instrument. Except as expressly amended and/or

supplemented by this Third Supplemental Indenture with respect to the 2036 Notes, the terms and provisions of the Base Indenture shall

remain in full force and effect. Notwithstanding the foregoing, this Third Supplemental Indenture shall only apply to the 2036 Notes.

Article 2

DEFINITIONS

Section 2.01         Definitions

and Other Provisions of General Application. For all purposes of this Third Supplemental Indenture unless otherwise specified

herein:

(a)          all

terms used in this Third Supplemental Indenture which are not otherwise defined herein shall have the meanings they are given in the

Base Indenture;

(b)          the

provisions of general application stated in Sections 1.01 through 1.13 and Sections 1.15 and 1.16 of the Base Indenture shall apply

to this Third Supplemental Indenture, except that the words “herein,” “hereof,” “hereto,” and “hereunder”

and other words of similar import refer to this Third Supplemental Indenture as a whole and not to the Base Indenture or any particular

Article, Section, or other subdivision of the Base Indenture or this Third Supplemental Indenture;

with respect to the 2036 Notes, Section 1.14 of the Base Indenture is hereby amended and restated as follows:

“Section 1.14 Legal Holidays.

In the event that a Fixed Rate Interest

Payment Date, Redemption Date or the Stated Maturity Date falls on a day that is not a Business Day, then the amounts payable on such

date will be paid on the next succeeding Business Day without the accumulation of additional interest. In the event that a Floating Rate

Interest Payment Date falls on a day that is not a Business Day, then such Floating Rate Interest Payment Date will be postponed to the

next succeeding Business Day unless such day falls in the next succeeding calendar month, in which case such Floating Rate Interest Payment

Date will be accelerated to the immediately preceding Business Day, and, in each such case, the amounts payable on such Business Day

will include interest accrued to but excluding such Business Day.”

(d)         the

terms defined in this Section 2.01 (except as herein otherwise expressly provided or unless the context of this Third Supplemental

Indenture otherwise requires) for all purposes of this Third Supplemental Indenture and of any indenture supplemental hereto have the

respective meanings specified in this Section 2.01. All other terms used in this Third Supplemental Indenture that are defined in

the Base Indenture, either directly or by reference therein (except as herein otherwise expressly provided or unless the context of this

Third Supplemental Indenture otherwise requires), have the respective meanings assigned to such terms in the Base Indenture, as in force

at the date of this Third Supplemental Indenture as originally executed; provided that any term that is defined in both the Base Indenture

and this Third Supplemental Indenture shall have the meaning assigned to such term in this Third Supplemental Indenture with respect

to the 2036 Notes:

“1940

Act Event” means an event requiring the Company to register as an investment company pursuant to the Investment Company

Act of 1940, as amended.

“2036

Notes” has the meaning provided in the recitals.

“Bank”

means Atlantic Union Bank.

“Base

Indenture” has the meaning provided in the recitals.

“Benchmark”

means, initially, Three-Month Term SOFR; provided that if the Calculation Agent determines on or prior to the Reference Time for any

Interest Period that a Benchmark Transition Event and its related Benchmark Replacement Date have occurred with respect to Three-Month

Term SOFR or the then-current Benchmark, then “Benchmark” means the applicable Benchmark Replacement for such Interest

Period and any subsequent Interest Periods. All percentages used in or resulting from any calculation of the then-current Benchmark shall

be rounded, if necessary, to the nearest one-hundred-thousandth of a percentage point, with 0.000005% rounded up to 0.00001%.

“Benchmark

Replacement” means the Interpolated Benchmark with respect to the then-current Benchmark, plus the Benchmark Replacement

Adjustment for such Benchmark; provided that if (a) the Calculation Agent cannot determine the Interpolated Benchmark as of the

Benchmark Replacement Date or (b) the then-current Benchmark is Three-Month Term SOFR and a Benchmark Transition Event and its related

Benchmark Replacement Date have occurred with respect to Three-Month Term SOFR (in which event no Interpolated Benchmark with respect

to Three-Month Term SOFR shall be determined), then “Benchmark Replacement” means the first alternative set forth

in the order below that can be determined by the Calculation Agent as of the Benchmark Replacement Date:

(1)          Compounded

SOFR;

(2)          the

sum of: (a) the alternate rate that has been selected or recommended by the Relevant Governmental Body as the replacement for the

then-current Benchmark for the applicable Corresponding Tenor and (b) the Benchmark Replacement Adjustment;

(3)          the

sum of: (a) the ISDA Fallback Rate, and (b) the Benchmark Replacement Adjustment; and

(4)          the

sum of: (a) the alternate rate that has been selected by the Calculation Agent as the replacement for the then-current Benchmark

for the applicable Corresponding Tenor, giving due consideration to any industry-accepted rate as a replacement for the then-current

Benchmark for U.S. Dollar-denominated floating rate securities at such time, and (b) the Benchmark Replacement Adjustment.

“Benchmark

Replacement Adjustment” means the first alternative set forth in the order below that can be determined by the Calculation

Agent as of the Benchmark Replacement Date:

(1)          the

spread adjustment, or method for calculating or determining such spread adjustment (which may be a positive or negative value or zero),

that has been selected or recommended by the Relevant Governmental Body for the applicable Unadjusted Benchmark Replacement;

(2)          if

the applicable Unadjusted Benchmark Replacement is equivalent to the ISDA Fallback Rate, then the ISDA Fallback Adjustment; and

(3)          the

spread adjustment (which may be a positive or negative value or zero) that has been selected by the Calculation Agent giving due consideration

to any industry-accepted spread adjustment or method for calculating or determining such spread adjustment, for the replacement of the

then-current Benchmark with the applicable Unadjusted Benchmark Replacement for U.S. Dollar-denominated floating rate securities at such

time.

“Benchmark

Replacement Conforming Changes” means, with respect to any Benchmark Replacement, any technical, administrative, or

operational changes (including changes to the definition of “Interest Period,” timing and frequency of determining rates

with respect to each Interest Period and making payments of interest, rounding of amounts or tenors, and other administrative matters)

that the Calculation Agent decides may be appropriate to reflect the adoption of such Benchmark Replacement in a manner substantially

consistent with market practice (or, if the Calculation Agent decides that adoption of any portion of such market practice is not administratively

feasible or if the Calculation Agent determines that no market practice for use of the Benchmark Replacement exists, in such other manner

as the Calculation Agent determines is reasonably necessary).

“Benchmark

Replacement Date” means the earliest to occur of the following events with respect to the then-current Benchmark:

(1)          in

the case of clause (1) of the definition of “Benchmark Transition Event,” the relevant Reference Time in respect

of any determination;

(2)          in

the case of clause (2) or (3) of the definition of “Benchmark Transition Event,” the later of (a) the

date of the public statement or publication of information referenced therein and (b) the date on which the administrator of the

Benchmark permanently or indefinitely ceases to provide the Benchmark; or

(3)          in

the case of clause (4) of the definition of “Benchmark Transition Event,” the date of the public statement or publication

of information referenced therein.

For the avoidance of doubt, for purposes of the

definitions of Benchmark Replacement Date and Benchmark Transition Event, references to the Benchmark also include any reference rate

underlying the Benchmark (for example, if the Benchmark becomes Compounded SOFR, references to the Benchmark would include SOFR).

For the avoidance of doubt, if the event giving

rise to the Benchmark Replacement Date occurs on the same day as, but earlier than, the Reference Time in respect of any determination,

the Benchmark Replacement Date will be deemed to have occurred prior to the Reference Time for such determination.

“Benchmark

Transition Event” means the occurrence of one or more of the following events with respect to the then-current Benchmark:

(1)          if

the Benchmark is Three-Month Term SOFR, (a) the Relevant Governmental Body has not selected or recommended a forward-looking term

rate for a tenor of three months based on SOFR, (b) the development of a forward-looking term rate for a tenor of three months based

on SOFR that has been recommended or selected by the Relevant Governmental Body is not complete, or (c) the Company determines that

the use of a forward-looking rate for a tenor of three months based on SOFR is not administratively feasible;

(2)          a

public statement or publication of information by or on behalf of the administrator of the Benchmark announcing that such administrator

has ceased or will cease to provide the Benchmark, permanently or indefinitely; provided that, at the time of such statement or publication,

there is no successor administrator that will continue to provide the Benchmark;

(3)          a

public statement or publication of information by the regulatory supervisor for the administrator of the Benchmark, the central bank

for the currency of the Benchmark, an insolvency official with jurisdiction over the administrator for the Benchmark, a resolution authority

with jurisdiction over the administrator for the Benchmark, or a court or an entity with similar insolvency or resolution authority over

the administrator for the Benchmark, which states that the administrator of the Benchmark has ceased or will cease to provide the Benchmark

permanently or indefinitely; provided that, at the time of such statement or publication, there is no successor administrator that will

continue to provide the Benchmark; or

(4)          a

public statement or publication of information by the regulatory supervisor for the administrator of the Benchmark announcing that the

Benchmark is no longer representative.

“Business

Day” means any day other than a Saturday, a Sunday, or a day on which banking institutions in the City of New York are

authorized or required by law, regulation, or executive order to remain closed.

“Calculation

Agent” means the agent appointed by the Company prior to the commencement of the Floating Rate Period, which may include

the Company or any of its affiliates, or any other successor appointed by the Company, to act as calculation agent.

“Company”

has the meaning provided in the preamble.

“Compounded

SOFR” means the compounded average of SOFRs for the applicable Corresponding Tenor, with the rate, or methodology for

this rate, and conventions for this rate being established by the Calculation Agent in accordance with:

(1)          the

rate, or methodology for this rate, and conventions for this rate selected or recommended by the Relevant Governmental Body for determining

Compounded SOFR; provided that:

(2)          if,

and to the extent that, the Calculation Agent determines that Compounded SOFR cannot be determined in accordance with clause (1) above,

then the rate, or methodology for this rate, and conventions for this rate that have been selected by the Calculation Agent giving due

consideration to any industry-accepted market practice for U.S. Dollar-denominated floating rate securities at such time.

For the avoidance of doubt, the calculation of

Compounded SOFR shall exclude the Benchmark Replacement Adjustment (if applicable) and the spread of 186 basis points per annum.

“Corresponding

Tenor” with respect to a Benchmark Replacement means a tenor (including overnight) having approximately the same length

(disregarding business day adjustment) as the applicable tenor for the then-current Benchmark.

“DTC”

has the meaning provided in Section 3.04.

“Federal

Reserve Board” means the Board of Governors of the Federal Reserve System or any successor regulatory authority with

jurisdiction over bank or financial holding companies.

“First

Reset Date” has the meaning provided in Section 3.05(a).

“Fixed

Rate Interest Payment Date” has the meaning provided in Section 3.05(a).

“Floating

Rate Interest Payment Date” has the meaning provided in Section 3.05(a).

“Floating

Rate Period” has the meaning provided in Section 3.05(a).

“Global

Note” shall be a global security representing 2036 Notes and have the meaning set forth in Section 3.04.

“Indenture”

has the meaning provided in the recitals.

“Independent

Regulatory Counsel” means a law firm, a member of a law firm, or an independent practitioner that is experienced in

matters of federal bank holding company and banking regulatory law, including the laws, rules, and guidelines of the Federal Reserve

Board relating to regulatory capital, and shall include any Person who, under the standards of professional conduct then prevailing and

applicable to such counsel, would not have a conflict of interest in representing the Company or the Trustee in connection with providing

the legal opinion contemplated by the definition of the term “Tier 2 Capital Event.”

“Independent

Tax Counsel” means a law firm, a member of a law firm, or an independent practitioner that is experienced in matters

of federal income taxation law, including the deductibility of interest payments made with respect to corporate debt instruments, and

shall include any Person who, under the standards of professional conduct then prevailing and applicable to such counsel, would not have

a conflict of interest in representing the Company or the Trustee in connection with providing the legal opinion contemplated by the

definition of the term “Tax Event.”

“Initial

2036 Notes” has the meaning provided in Section 5.01.

“Interest

Payment Date” has the meaning provided in Section 3.05(a).

“Interest

Period” has the meaning provided in Section 3.05(b).

“Interpolated

Benchmark” with respect to the Benchmark means the rate determined for the Corresponding Tenor by interpolating on a

linear basis between: (1) the Benchmark for the longest period (for which the Benchmark is available) that is shorter than the Corresponding

Tenor, and (2) the Benchmark for the shortest period (for which the Benchmark is available) that is longer than the Corresponding

Tenor.

“ISDA”

means the International Swaps and Derivatives Association, Inc. or any successor.

“ISDA

Definitions” means the 2021 ISDA Definitions published by the ISDA or any successor thereto, as amended or supplemented

from time to time, or any successor definitional booklet for interest rate derivatives published from time to time.

“ISDA

Fallback Adjustment” means the spread adjustment (which may be a positive or negative value or zero) that would apply

for derivatives transactions referencing the ISDA Definitions to be determined upon the occurrence of an index cessation event with respect

to the Benchmark for the applicable tenor.

“ISDA

Fallback Rate” means the rate that would apply for derivatives transactions referencing the ISDA Definitions to be effective

upon the occurrence of an index cessation date with respect to the Benchmark for the applicable tenor excluding the applicable ISDA Fallback

Adjustment.

“Place

of Payment” shall mean an office or agency of the Company maintained for such purpose, which shall initially be the

corporate trust office of the Trustee located at 60 Livingston Avenue, St. Paul, MN 55107, Attn: Global Corporate Trust Services.

“Regular

Record Date” means the 15th calendar day that is immediately preceding the applicable Interest Payment Date, whether

or not a Business Day.

“Reference

Time” with respect to any determination of the Benchmark means (1) if the Benchmark is Three-Month Term SOFR, the

date that is two (2) Business Days prior to the start of the relevant Floating Rate Interest Period, or such other time determined

by the Calculation Agent after giving effect to the Three-Month Term SOFR Conventions, and (2) if the Benchmark is not Three-Month

Term SOFR, the time determined by the Calculation Agent after giving effect to the Benchmark Replacement Conforming Changes.

“Relevant

Governmental Body” means the Federal Reserve Board and/or the Federal Reserve Bank of New York, or a committee officially

endorsed or convened by the Federal Reserve Board and/or the Federal Reserve Bank of New York or any successor thereto.

“Third

Supplemental Indenture” has the meaning provided in the preamble.

“SOFR”

means the secured overnight financing rate published by the Federal Reserve Bank of New York, as the administrator of the Benchmark (or

a successor administrator), on the Federal Reserve Bank of New York’s website.

“Stated

Maturity Date” shall have the meaning set forth in Section 3.02 hereof.

“Tax

Event” means the receipt by the Company of an opinion of Independent Tax Counsel to the effect that, as a result of:

(a) an amendment to or change (including any announced prospective amendment or change) in any law or treaty, or any regulation

thereunder, of the United States or any of its political subdivisions or taxing authorities; (b) a judicial decision, administrative

action, official administrative pronouncement, ruling, regulatory procedure, regulation, notice, or announcement, including any notice

or announcement of intent to adopt or promulgate any ruling, regulatory procedure, or regulation (any of the foregoing, an “administrative

or judicial action”); (c) an amendment to or change in any official position with respect to, or any interpretation of,

an administrative or judicial action or a law or regulation of the United States that differs from the previously generally accepted

position or interpretation; or (d) a threatened challenge asserted in writing in connection with an audit of the Company’s

federal income tax returns or positions, or a similar audit of any of its Subsidiaries, or a publicly known threatened challenge asserted

in writing against any other taxpayer that has raised capital through the issuance of securities that are substantially similar to the

2036 Notes, in each case, occurring or becoming publicly known on or after the original issue date of the 2036 Notes, there is more than

an insubstantial risk that interest payable by the Company on the 2036 Notes is not, or, within 90 days of the date of such opinion,

will not be, deductible by the Company, in whole or in part, for United States federal income tax purposes.

“Term

SOFR” means the forward-looking term rate based on SOFR that has been selected or recommended by the Relevant Governmental

Body.

“Term

SOFR Administrator” means any entity designated by the Relevant Governmental Body as the administrator of Term SOFR

(or a successor administrator).

“Three-Month

Term SOFR” means the rate for Term SOFR for a tenor of three months that is published by the Term SOFR Administrator

at the Reference Time for any Interest Period, as determined by the Calculation Agent after giving effect to the Three-Month Term SOFR

Conventions. All percentages used in or resulting from any calculation of Three-Month Term SOFR shall be rounded, if necessary, to the

nearest one-hundred-thousandth of a percentage point, with 0.000005% rounded up to 0.00001%.

“Three-Month

Term SOFR Conventions” means any determination, decision, or election with respect to any technical, administrative,

or operational matter (including with respect to the manner and timing of the publication of Three-Month Term SOFR, or changes to the

definition of “Interest Period,” timing and frequency of determining Three-Month Term SOFR with respect to each Interest

Period and making payments of interest, rounding of amounts or tenors, and other administrative matters) that the Calculation Agent decides

may be appropriate to reflect the use of Three-Month Term SOFR as the Benchmark in a manner substantially consistent with market practice

(or, if the Calculation Agent decides that adoption of any portion of such market practice is not administratively feasible or if the

Calculation Agent determines that no market practice for the use of Three-Month Term SOFR exists, in such other manner as the Calculation

Agent determines is reasonably necessary).

“Tier

2 Capital Event” means the receipt by the Company of an opinion of Independent Regulatory Counsel that as a result of:

(a)         any

amendment to, or change in, the laws, rules, or regulations of the United States (including, for the avoidance of doubt, any agency or

instrumentality of the United States, including the Federal Reserve Board and other appropriate federal bank regulatory agencies) or

any political subdivision of or in the United States that is enacted or becomes effective after the initial issuance of the 2036 Notes;

(b)         any

proposed change in those laws, rules, or regulations that is announced or becomes effective after the initial issuance of the 2036 Notes;

official administrative decision, judicial decision, administrative action, or other official pronouncement interpreting or applying

those laws, rules, or regulations or policies with respect thereto that is announced after the initial issuance of the 2036 Notes,

each case, there is more than an insubstantial risk that the Company will not be entitled to treat the 2036 Notes then outstanding as

“Tier 2 Capital” (or its equivalent) for purposes of the capital adequacy rules of the Federal Reserve

Board (or, as and if applicable, the capital adequacy rules or regulations of any successor appropriate federal banking agency)

as then in effect and applicable, for so long as any 2036 Note is outstanding. “Appropriate federal banking agency”

means the “appropriate federal banking agency” with respect to the Company as that term is defined in Section 3(q) of

the Federal Deposit Insurance Act or any successor provision.

“Trustee”

has the meaning provided in the preamble.

“Unadjusted

Benchmark Replacement” means the Benchmark Replacement excluding the Benchmark Replacement Adjustment.

“U.S.

Dollars” means such currency of the United States as at the time of payment shall be legal tender for the payment of

public and private debt.

Article 3

FORM AND

TERMS OF THE 2036 Notes

Section 3.01         Establishment

of the Series; Designation, and Form of the 2036 Notes.

(a)          Pursuant

to the terms hereof and Sections 2.01 and 3.01 of the Base Indenture, the Company hereby creates a series of Securities designated as

the “6.25% Fixed-to-Floating Rate Subordinated Notes due August 1, 2036,” which are referred to herein as the 2036 Notes,

and have the CUSIP number 04911AAB3, which 2036 Notes shall be deemed “Securities” for all purposes under the Base Indenture

and shall have the terms set forth in the Base Indenture, as amended and supplemented by this Third Supplemental Indenture.

(b)         The

2036 Notes shall have such other terms as are set forth in the form thereof attached hereto as Exhibit A. The terms contained

in the 2036 Notes shall constitute, and are hereby expressly made, a part of the Indenture, and the Company and the Trustee, by their

execution and delivery of this Third Supplemental Indenture, expressly agree to such terms and provisions and to be bound thereby.

2036 Notes and the Trustee’s certificate of authentication thereon are to be substantially in the form attached as Exhibit A

hereto, with such changes therein as the officer of the Company executing the 2036 Notes (by manual or facsimile signature) in accordance

with Section 3.04 of the Base Indenture may approve in accordance with the terms hereof and of the Base Indenture, such approval

to be conclusively evidenced by such officer’s execution thereof.

(d)         The

2036 Notes will be issuable and may be transferred only in denominations of $1,000 or any amount in excess thereof that is an integral

multiple of $1,000.

Section 3.02         Maturity.

The date upon which the 2036 Notes shall become due and payable at final maturity, together with any accrued and unpaid interest then

owing, is August 1, 2036 (the “Stated Maturity Date”), unless such 2036 Notes shall have been redeemed in full

prior to such date pursuant to Article 4 hereof.

Section 3.03         Payment;

Appointment of Agents. Principal and, in the case of redemption, interest, if any, due on the Stated Maturity Date or any earlier

date of redemption of a 2036 Note shall be payable against presentation and, if the final payment, surrender of such 2036 Note at the

Place of Payment. Interest payable on an Interest Payment Date will be made by wire transfer in immediately available funds or, at the

option of the Company in the event that the 2036 Notes are not represented by one or more Global Notes, by check mailed to the Person

entitled thereto at such address as shall appear in the Security Register.

The Security Registrar, Paying Agent, and Calculation

Agent for the 2036 Notes shall initially be the Trustee.

The amounts payable with respect to the 2036 Notes

shall be payable in U.S. Dollars.

Section 3.04         Global

Notes. Except as provided in Section 3.06 of the Base Indenture, the 2036 Notes will be issued as one or more fully registered

global notes in book-entry form (each such global note, a “Global Note”) registered in the name of or held by The

Depository Trust Company (and any successor thereto) (“DTC”) or its nominee, as the U.S. Depository for the 2036 Notes,

and deposited with DTC or its designated custodian or such other U.S. Depository as any officer of the Company may from time to time

designate. Unless and until a Global Note is exchanged for 2036 Notes in certificated form, such Global Note may be transferred, in whole

but not in part, and any payments on the 2036 Notes shall be made, only to DTC or a nominee of DTC, or to a successor U.S. Depository

selected or approved by the Company or to a nominee of such successor U.S. Depository as provided in the Base Indenture.

Section 3.05         Interest.

(a)         The

2036 Notes will bear interest (i) at an initial rate of 6.25% per annum, payable semi-annually in arrears on February 1 and

August 1 of each year (each, a “Fixed Rate Interest Payment Date”), commencing on February 1, 2027, from

and including the date of issuance to but excluding August 1, 2031 (the “First Reset Date”) and (ii) from

and including the First Reset Date (the “Floating Rate Period”) at an annual floating rate equal to the then-current

Three-Month Term SOFR or such other Benchmark, as determined by the Calculation Agent at the Reference Time for the applicable Interest

Period, plus a spread of 213 basis points, payable quarterly in arrears on February 1, May 1, August 1, and November 1

of each year to but excluding the Stated Maturity Date or earlier redemption date (each, a “Floating Rate Interest Payment Date,”

and together with the Fixed Rate Interest Payment Dates, the “Interest Payment Dates”), commencing on November 1,

2031. The Calculation Agent will provide the Company and the Trustee (if not the Calculation Agent) with the interest rate in effect

during each Floating Rate Period on the 2036 Notes promptly after the Reference Time (or such other date of determination for the applicable

Benchmark). Notwithstanding the foregoing, if Three-Month Term SOFR (or other applicable Benchmark) is less than zero, then Three-Month

Term SOFR (or other such Benchmark) shall be deemed to be zero. The determination of Three-Month Term SOFR for each relevant Interest

Period by the Calculation Agent will (in the absence of manifest error) be final and binding. The Calculation Agent’s calculation

of the floating interest rate for each Interest Period during the Floating Rate Period will be maintained on file at the Calculation

Agent’s principal offices, and will be provided to the Trustee (to the extent that the Calculation Agent is not the Trustee). Interest

on the 2036 Notes will accrue from and including the immediately preceding Interest Payment Date in respect of which interest has been

paid or duly provided for (or from and including the date of issuance of the 2036 Notes, if no interest has previously been paid or duly

provided for with respect to any of the 2036 Notes) to but excluding the applicable Interest Payment Date, the Stated Maturity Date,

or the Redemption Date (each, an “Interest Period”).

(b)         Interest

on the 2036 Notes on any Interest Payment Date shall be payable to the Persons in whose names the relevant 2036 Notes are registered

at the close of business on the Regular Record Date for such Interest Payment Date, except as provided in Section 3.08 of the Base

Indenture. For the purpose of determining the Persons in whose names the relevant 2036 Notes are registered at the close of business

on a Regular Record Date that is not a Business Day, the close of business shall mean 5:00 p.m., New York City time, on the Regular

Record Date.

interest payable on the 2036 Notes on or prior to the First Reset Date will be computed on the basis of a 360-day year consisting of

twelve 30-day months and any interest payable on the 2036 Notes after the First Reset Date will be computed on the basis of the actual

number of days in the Interest Period in respect of which interest is payable divided by 360. Dollar amounts resulting from that calculation

will be rounded to the nearest cent, with one-half cent being rounded upward.

(d)         Effect

of Benchmark Transition Event.

(i)            If

the Calculation Agent determines that a Benchmark Transition Event and its related Benchmark Replacement Date have occurred on or prior

to the Reference Time in respect of any determination of the Benchmark on any date, then the Benchmark Replacement will replace the then-current

Benchmark for all purposes relating to the 2036 Notes during the Floating Rate Period in respect of such determination on such date and

all determinations on all subsequent dates. In connection with the implementation of a Benchmark Replacement, the Calculation Agent will

have the right to make Benchmark Replacement Conforming Changes from time to time.

(ii)           Notwithstanding

anything set forth in Section 3.05(a) above, if the Calculation Agent determines on or prior to the relevant Reference Time

that a Benchmark Transition Event and its related Benchmark Replacement Date have occurred with respect to Three-Month Term SOFR, then

the provisions set forth in this Section 3.05(f) will thereafter apply to all subsequent determinations of the interest rate

on the 2036 Notes during the Floating Rate Period. After a Benchmark Transition Event and its related Benchmark Replacement Date have

occurred, the interest rate on the 2036 Notes for each Interest Period during the Floating Rate Period will subsequently be an annual

rate equal to the Benchmark Replacement plus 213 basis points.

(iii)          The

Calculation Agent is expressly authorized to make certain determinations, decisions, and elections under the terms of the 2036 Notes,

including with respect to the use of Three-Month Term SOFR as the Benchmark and under this Section 3.05(e). Any determination, decision,

or election that may be made by the Calculation Agent under the terms of the 2036 Notes, including any determination with respect to

a tenor, rate, or adjustment or of the occurrence or non-occurrence of an event, circumstance, or date and any decision to take or refrain

from taking any action or selection (A) will be conclusive and binding on the Holders of the 2036 Notes and the Trustee absent manifest

error, (B) if made by the Company as Calculation Agent, will be made in the Company’s sole discretion, (C) if made by

a Calculation Agent other than the Company, will be made after consultation with the Company, and the Calculation Agent will not make

any such determination, decision, or election to which the Company reasonably objects and (D) notwithstanding anything to the contrary

herein or in the Base Indenture, shall become effective without consent from the Holders of the 2036 Notes, the Trustee, or any other

party. If the Calculation Agent fails to make any determination, decision, or election that it is required to make under the terms of

the 2036 Notes, then the Company will make such determination, decision, or election on the same basis as described above. The Calculation

Agent may conclusively rely upon, and shall be protected in acting or refraining from acting upon, and shall not be bound to make any

investigation into any information provided to (or obtained by) it in connection with the calculations and determinations to be made

by the Calculation Agent in connection with the 2036 Notes. The Calculation Agent shall not be liable for any error resulting from use

of or reliance upon any source of information in accordance with the terms of the Indenture.

(iv)          The

Company (or its Calculation Agent) shall notify the Trustee in writing (i) upon the occurrence of the Benchmark Transition Event

or the Benchmark Replacement Date, and (ii) of any Benchmark Replacements and Benchmark Replacement Conforming Changes, and other

items affecting the interest rate on the 2036 Notes after a Benchmark Transition Event.

(v)           The

Trustee (including in its capacity as Paying Agent) shall have no (A) responsibility or liability for the (w) Three-Month Term

SOFR Conventions, (x) selection of an alternative reference rate to Three-Month Term SOFR (including, without limitation, whether

the conditions for the designation of such rate have been satisfied or whether such rate is a Benchmark Replacement or an Unadjusted

Benchmark Replacement), (y) determination or calculation of a Benchmark Replacement, or (z) determination of whether a Benchmark

Transition Event or Benchmark Replacement Date has occurred, and in each such case under clauses (w) through (z) above

shall be entitled to conclusively rely upon the selection, determination, and/or calculation thereof as provided by the Company or its

Calculation Agent, as applicable, and (B) liability for any failure or delay in performing its duties hereunder as a result of the

unavailability of a Benchmark rate as described in the definition thereof, including, without limitation, as a result of the Company’s

or Calculation Agent’s failure to select a Benchmark Replacement or the Calculation Agent’s failure to calculate a Benchmark.

The Trustee shall be entitled to rely conclusively on all notices from the Company or its Calculation Agent regarding any Benchmark or

Benchmark Replacement, including, without limitation, with regard to Three-Month Term SOFR Conventions, a Benchmark Transition Event,

Benchmark Replacement Date, and Benchmark Replacement Conforming Changes. The Trustee shall not be responsible or liable for the actions

or omissions of the Calculation Agent, or any failure or delay in the performance of the Calculation Agent’s duties or obligations,

nor shall it be under any obligation to monitor or oversee the performance of the Calculation Agent. The Trustee shall be entitled to

conclusively rely on any determination made, and any instruction, notice, Officer’s Certificate, or other instruction or information

provided by the Calculation Agent without independent verification, investigation, or inquiry of any kind. The Trustee and the Calculation

Agent shall not be obligated to enter into any amendment or supplement hereto that adversely impacts its rights, duties, obligations,

immunities, or liabilities (including, without limitation, in connection with the adoption of any Benchmark Replacement Conforming Changes).

(vi)          If

the then-current Benchmark is Three-Month Term SOFR, the Calculation Agent will have the right to establish the Three-Month Term SOFR

Conventions, and if any of the foregoing provisions concerning the calculation of the interest rate and the payment of interest during

the Floating Rate Period are inconsistent with any of the Three-Month Term SOFR Conventions determined by the Calculation Agent, then

the relevant Three-Month Term SOFR Conventions will apply.

(e)          The

Calculation Agent shall have all the rights, protections, and indemnities afforded to the Trustee under the Base Indenture and hereunder.

The Calculation Agent may be removed by the Company at any time. If the Calculation Agent is unable or unwilling to act as Calculation

Agent or is removed by the Company, the Company will promptly appoint a replacement Calculation Agent or act as Calculation Agent. The

Calculation Agent may not resign its duties without a successor having been duly appointed; provided that if a successor Calculation

Agent has not been appointed by the Company and such successor accepted such position within 30 days after the giving of notice of resignation

by the Calculation Agent, the resigning Calculation Agent may petition, at the expense of the Company, any court of competent jurisdiction

for the appointment of a successor Calculation Agent with respect to such series. The Company shall take such actions as are necessary

to ensure that, from the commencement of the Floating Rate Period, for so long as any of the 2036 Notes are outstanding, there will at

all times be a Calculation Agent appointed by the Company to calculate Three-Month Term SOFR or such other Benchmark in respect of each

Interest Period during the Floating Rate Period. The Trustee will not be under any duty to succeed to, assume, or otherwise perform any

of the duties of the Calculation Agent, or to appoint a successor or replacement in the event of the Calculation Agent’s resignation

or removal or to replace the Calculation Agent in the event of a default, breach, or failure of performance on the part of the Calculation

Agent with respect to the Calculation Agent’s duties and obligations hereunder. For the avoidance of doubt, if at any time there

is no Calculation Agent appointed by the Company, then the Company shall be the Calculation Agent. The Company may appoint itself or

any of its Affiliates to be the Calculation Agent.

Section 3.06         Subordination.

The Company, for itself, its successors, and assigns, covenants and agrees, and each Holder of 2036 Notes by the Holder’s acceptance

thereof, likewise covenants and agrees, that the indebtedness evidenced by the 2036 Notes and the payment of the principal of, and interest

on, each and all of the 2036 Notes is and will be expressly subordinated in right of payment to the prior payment in full of all Senior

Indebtedness to the extent and in the manner described in Article 13 of the Base Indenture and will rank junior in right of payment

and upon the Company’s liquidation to any of the Company’s existing and future general creditors. The 2036 Notes will rank

senior to the Company’s obligations relating to any outstanding junior subordinated debt securities issued to the Company’s

capital trust subsidiaries, whether now existing or hereafter acquired. It is intended that the 2036 Notes be and are Tier 2 capital

or the equivalent for all regulatory purposes.

Section 3.07         No

Sinking Fund. The 2036 Notes are not entitled to the benefit of, or subject to, any sinking fund.

Section 3.08         No

Conversion or Exchange Rights. The 2036 Notes shall not be convertible into, or exchangeable for, any equity securities, other

securities, or other assets of the Company or any Subsidiary.

Section 3.09         Events

of Default; Acceleration.

(a)          Solely

with respect to the 2036 Notes, Section 5.01(6) and Section 5.01(7) of the Base Indenture are hereby amended and

restated as follows:

“(6) a court having jurisdiction

in the premises shall enter a decree or order for relief in respect of the Company or the Bank in an involuntary case under any applicable

bankruptcy, insolvency or other similar law now or hereafter in effect, or appointing a receiver, liquidator, assignee, custodian, trustee,

sequestrator (or similar official) of the Company or the Bank or for any substantial part of its property, or ordering the winding up

or liquidation of its affairs, and such decree or order shall remain unstayed and in effect for a period of 60 consecutive days;

(7) the Company or the Bank shall

commence a voluntary case under any applicable bankruptcy, insolvency or other similar law now or hereafter in effect, or shall consent

to the entry of an order for relief in any involuntary case under any such law, or shall consent to the appointment of or taking possession

by a receiver, liquidator, assignee, trustee, custodian, sequestrator (or similar official) of the Company or the Bank or for any substantial

part of its property, or shall make any general assignment for the benefit of creditors, or shall fail generally to pay its debts as

they become due or shall take any corporate action in furtherance of any of the foregoing; or”

(b)         Soley

with respect to the 2036 Notes, the first paragraph of Section 5.02 of the Base Indenture is hereby amended and restated as follows:

“If an Event of Default specified in Section 5.01(6) or

Section 5.01(7) occurs and is continuing with respect to the 2036 Notes, then the Trustee or the Holders of not less than 25%

in principal amount of the Outstanding 2036 Notes may declare the principal of the 2036 Notes, to be due and payable immediately, by

a notice in writing to the Company (and to the Trustee if given by the Holders), and upon any such declaration such principal, together

with accrued and unpaid interest, if any, thereon, shall become immediately due and payable. The Maturity of the 2036 Notes shall not

otherwise be accelerated as a result of an Event of Default.”

Section 3.10         Defeasance.

Sections 4.03 and 4.04 of the Base Indenture shall apply to the 2036 Notes. However, and in addition, any defeasance of the 2036

Notes pursuant to Sections 4.03 or 4.04 of the Base Indenture shall be subject to the Company obtaining the prior approval of the

Federal Reserve Board and any additional requirements that the Federal Reserve Board may impose with respect to defeasance of the 2036

Notes. Notwithstanding the foregoing, if, due to a change in law, regulation or policy subsequent to the date of this Third Supplemental

Indenture, the Federal Reserve Board does not require that defeasance of instruments be subject to Federal Reserve Board approval in

order for the instrument to be accorded Tier 2 capital treatment, then no such approval of the Federal Reserve Board will be required

for such defeasance.

Section 3.11         No

Collateral. The 2036 Notes shall not be entitled to the benefit of any security interest in, or collateralization by, any rights,

property, or interest of the Company.

Article 4

REDEMPTION

OF THE 2036 Notes

Section 4.01         Optional

Redemption. The Company may, at its option, redeem the 2036 Notes before the Stated Maturity Date, in whole or in part, beginning

with the Interest Payment Date of August 1, 2031, and on any date thereafter. Any such redemption will be at a Redemption Price

equal to 100% of the principal amount of the 2036 Notes to be redeemed, plus unpaid interest, if any, accrued thereon to but excluding

the Redemption Date fixed by the Company; provided, however, that interest due on an Interest Payment Date falling on or prior to the

scheduled Redemption Date will be payable to the Holders thereof as of the Regular Record Date for such Interest Payment Date. Any early

redemption of the 2036 Notes by the Company pursuant to this Section 4.01 will be subject to the receipt of the prior approval of

the Federal Reserve Board, to the extent then required under applicable laws or regulations, including capital regulations.

Section 4.02         Redemption

Upon Special Events. The Company may also, at its option, redeem the 2036 Notes before the Stated Maturity Date in whole, but

not in part, at any time, upon the occurrence of a Tax Event, a Tier 2 Capital Event, or a 1940 Act Event. Any such redemption will be

at a Redemption Price equal to 100% of the principal amount of the 2036 Notes to be redeemed, plus unpaid interest, if any, accrued thereon

to but excluding the Redemption Date fixed by the Company; provided, however, that interest due on an Interest Payment Date falling on

or prior to the scheduled Redemption Date will be payable to the Holders thereof as of the Regular Record Date for such Interest Payment

Date. Any early redemption of the 2036 Notes by the Company pursuant to this Section 4.02 will be subject to the receipt of the

prior approval of the Federal Reserve Board, to the extent then required under applicable laws or regulations, including capital regulations.

Section 4.03         Notice

of Redemption. Soley with respect to the 2036 Notes, the first paragraph of Section 11.04 of the Base Indenture is hereby

amended and restated as follows:

“Notice of redemption shall be

given in the manner provided in Section 1.06, not less than 10 nor more than 60 days prior to the Redemption Date, unless a shorter

period is specified in the 2036 Notes to be redeemed (provided notice may be given more than 60 days prior to the Redemption Date in

connection with a defeasance or the satisfaction and discharge of the series), to the Holders of the 2036 Notes to be redeemed. Failure

to give notice by sending in the manner herein provided to the Holder of any 2036 Notes designated for redemption as a whole or in part,

or any defect in the notice to any such Holder, shall not affect the validity of the proceedings for the redemption of any other 2036

Notes or portion thereof. Notices of redemption may be conditional, in the Company’s discretion, on one or more conditions precedent,

and the Redemption Date may be delayed until such time as any or all of such conditions have been satisfied or revoked by the Company

if it determines that such conditions will not be satisfied.”

Section 4.04         Applicability

of Base Indenture. To the extent not inconsistent with this Article 4, the provisions of Article 11 of the Base Indenture

shall apply to any redemption of the 2036 Notes hereunder.

Article 5

ISSUE

OF 2036 Notes

Section 5.01         Original

Issue of 2036 Notes. 2036 Notes having an aggregate principal amount of Two-Hundred-Fifty-Million Dollars ($250,000,000) (the

“Initial 2036 Notes”) may from time to time, upon execution of this Third Supplemental Indenture, be executed by the

Company and delivered to the Trustee for authentication, and the Trustee shall thereupon authenticate and deliver the Initial 2036 Notes

in accordance with a Company Order delivered pursuant to Section 3.04 of the Base Indenture).

Section 5.02         Additional

Issues of Notes. The Company may from time to time, without notice to or the consent of the Holders of the 2036 Notes, create

and issue additional 2036 Notes, which 2036 Notes will rank pari passu with the Initial 2036 Notes and be identical in all respects

as the Initial 2036 Notes except for their issuance date, the issue price, and the first Interest Payment Date; provided that such additional

2036 Notes either shall be fungible with the Initial 2036 Notes for federal income tax purposes or shall be issued under a separate CUSIP

number. Such additional 2036 Notes will be consolidated and form a single series with the Initial 2036 Notes under the Indenture.

Article 6

SUPPLEMENTAL

INDENTURES

Section 6.01         Supplemental

Indentures. Solely with respect to the 2036 Notes, Section 9.01 of the Base Indenture is hereby amended by (a) replacing

the “; or” at the end of clause (10) with a semicolon, and (b) replacing the period at the end of clause (11) with

“;” and (iii) inserting the following new clauses (12) and (13) immediately after clause (11):

“(12)

to add guarantors or permit any Person to guarantee the obligations under any series of Securities; or

(13)

to conform the terms of the Indenture and the 2036 Notes to the description of the 2036 Notes in the prospectus supplement dated July 27,

2026 relating to the offering of the Initial 2036 Notes.”

Article 7

MISCELLANEOUS

Section 7.01         Trust

Indenture Act. This Third Supplemental Indenture is subject to the provisions of the Trust Indenture Act that are required to

be part of the Indenture and shall, to the extent applicable, be governed by such provisions. If any provision of this Third Supplemental

Indenture limits, qualifies, or conflicts with a provision of the Trust Indenture Act that is required under such act to be a part of

and govern this Third Supplemental Indenture, the latter provision shall control.

Section 7.02         Governing

Law; Waiver of Jury Trial. The laws of the State of New York shall govern this Third Supplemental Indenture and the 2036 Notes.

THE PARTIES HERETO EACH HEREBY WAIVE ANY RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM ARISING OUT OF OR RELATING

TO THIS THIRD SUPPLEMENTAL INDENTURE OR THE 2036 NOTES OR ANY TRANSACTION RELATED HERETO OR THERETO TO THE FULLEST EXTENT PERMITTED BY

APPLICABLE LAW.

Section 7.03         Duplicate

Originals. This Third Supplemental Indenture may be executed in any number of counterparts, each of which so executed shall be

an original, with the same effect as if the signatures thereto and hereto were upon the same instrument, but all such counterparts shall

together constitute but one and the same instrument. Signatures to this Third Supplemental Indenture transmitted by electronic mail in

“portable document format” (“.pdf”) form, or by any other electronic means intended to preserve the original

graphic and pictorial appearance of a document (including any electronic signature covered by the U.S. federal ESIGN Act of 2000, Uniform

Electronic Transactions Act, the Electronic Signatures and Records Act or other applicable law, e.g., www.docusign.com), shall have the

same effect as physical delivery of the paper document bearing the original signature.

Section 7.04         Severability.

In case any provision in this Third Supplemental Indenture or the 2036 Notes shall be invalid, illegal, or unenforceable, the validity,

legality, and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

Section 7.05         Ratification.

The Base Indenture, as supplemented and amended by this Third Supplemental Indenture, is in all respects ratified and confirmed. The

Base Indenture and this Third Supplemental Indenture shall be read, taken, and construed as one and the same instrument and every Holder

of 2036 Notes authenticated and delivered under this Third Supplemental Indenture shall be bound hereby; provided that the provisions

of this Third Supplemental Indenture apply solely with respect to the 2036 Notes. All provisions included in this Third Supplemental

Indenture supersede any conflicting provisions included in the Base Indenture with respect to the 2036 Notes unless not permitted by

law. The Trustee accepts the trusts created by the Base Indenture, as supplemented and amended by this Third Supplemental Indenture,

and agrees to perform the same upon the terms and conditions of the Base Indenture, as supplemented and amended by this Third Supplemental

Indenture. All of the rights, protections, benefits, immunities and indemnities afforded or given to the Trustee, the Paying Agent, the

Security Registrar and/or the Calculation Agent pursuant to the Base Indenture shall apply to and be enforceable by each of the Trustee,

the Paying Agent, the Security Registrar and the Calculation Agent acting in its respective capacities relating to the 2036 Notes and

pursuant to this Third Supplemental Indenture mutatis mutandis as if set forth and incorporated herein.

Section 7.06         Effectiveness.

The provisions of this Third Supplemental Indenture shall become effective as of the date hereof.

Section 7.07         Successors.

All agreements of the Company in this Third Supplemental Indenture shall bind its successors. All agreements of the Trustee in this Third

Supplemental Indenture shall bind its successors.

Section 7.08         Indenture

and 2036 Notes Solely Corporate Obligations. No recourse for the payment of the principal of or interest on any 2036 Note, or

for any claim based thereon or otherwise in respect thereof, shall be had against any shareholder, employee, agent, officer, or director,

as such, past, present, or future, of the Company or of any successor Person; it being expressly understood that all such liability is

hereby expressly waived and released as a condition of, and as a consideration for, the execution of this Third Supplemental Indenture

and the issue of the 2036 Notes.

Section 7.09         Trustee’s

Disclaimer. The recitals contained herein shall be taken as the statements of the Company and the Trustee assumes no responsibility

for their correctness. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency

of this Third Supplemental Indenture, the 2036 Notes, any offering materials or for or in respect of the recitals contained herein, all

of which recitals are made solely by the Company.

[Remainder of page intentionally left blank.]

IN WITNESS WHEREOF, the parties hereto have caused

this Third Supplemental Indenture to be duly executed as of the date first above written.

ATLANTIC UNION BANKSHARES CORPORATION, as the Company

By:

/s/ Alexander D. Dodd

Name:

Alexander D. Dodd

Title:

Executive Vice President and Chief Financial Officer

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,

as Trustee, Paying Agent, Security Registrar and Calculation Agent

By:

/s/ Wally Jones

Name:

Wally Jones

Title:

Vice President

[Signature Page to

Third Supplemental Indenture]

EXHIBIT A

[NOTE: The following legend is to be placed at the beginning of

any Global Note representing the 2036 Notes.]

GLOBAL NOTE

THIS SECURITY IS A GLOBAL NOTE WITHIN THE MEANING

OF THE INDENTURE REFERRED TO IN THIS SECURITY AND IS REGISTERED IN THE NAME OF A DEPOSITORY OR ITS NOMINEE. UNLESS AND UNTIL IT

IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES OF THIS SERIES IN CERTIFICATED FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT

AS A WHOLE BY THE DEPOSITORY TO A NOMINEE OF THE DEPOSITORY OR BY A NOMINEE OF THE DEPOSITORY TO THE DEPOSITORY OR ANY SUCH NOMINEE TO

A SUCCESSOR DEPOSITORY OR A NOMINEE OF SUCH DEPOSITORY. UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF SUCH

A TRANSFEROR TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED

IN THE NAME OF SUCH A TRANSFEREE OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF SUCH A TRANSFEROR AND ANY PAYMENT

IS MADE TO SUCH A TRANSFEREE, ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE

THE REGISTERED OWNER HEREOF, SUCH A TRANSFEROR, HAS AN INTEREST HEREIN.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED

REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE COMPANY (AS DEFINED HEREIN) OR ITS

AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO.

OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH

OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE

BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

THIS SECURITY AND THE OBLIGATIONS OF THE COMPANY

AS EVIDENCED HEREBY (1) ARE NOT SAVINGS ACCOUNTS, DEPOSITS, OR OTHER OBLIGATIONS OF ANY BANK OR ANY OF THE COMPANY’S SUBSIDIARIES

AND ARE NOT INSURED OR GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY OTHER GOVERNMENTAL AGENCY OR INSTRUMENTALITY AND

(2) ARE SUBORDINATE IN THE RIGHT OF PAYMENT TO THE SENIOR INDEBTEDNESS (AS DEFINED IN THE INDENTURE REFERRED TO IN THIS SECURITY).

A-1

ATLANTIC UNION BANKSHARES CORPORATION

6.25% FIXED-TO-FLOATING RATE SUBORDINATED NOTE

DUE AUGUST 1, 2036

No. R-[___]

CUSIP: 04911AAB3

$[____]

ISIN: US04911AAB35

Atlantic

Union Bankshares Corporation, a Virginia corporation (hereinafter called the “Company,” which term includes

any permitted successor under the Indenture hereinafter referred to), for value received, hereby promises to pay to                             ,

or registered assigns, the principal sum of

Dollars ($                    ) (or

such other amount as set forth in the Schedule of Increases or Decreases in Global Note attached hereto) on August 1, 2036 (such

date is hereinafter referred to as the “Stated Maturity Date”), unless redeemed prior to such date as permitted below,

and to pay interest on the outstanding principal amount of this 2036 Note from and including the date of issuance or from and including

the most recent Interest Payment Date to which interest has been paid or duly provided for, as the case may be, at the rate of 6.25%

per annum, payable semi-annually in arrears on February 1 and August 1 of each year (each, a “Fixed Rate Interest

Payment Date”), commencing on February 1, 2027, from and including the date of issuance to but excluding August 1,

2031 (the “First Reset Date”), and from and including the First Reset Date, at an annual floating rate equal to the

then-current Three-Month Term SOFR (as defined in the Third Supplemental Indenture hereinafter referred to), or such other Benchmark

(as defined in the Third Supplemental Indenture hereinafter referred to) as determined pursuant to the Third Supplemental Indenture for

the applicable Interest Period (as defined in the Third Supplemental Indenture hereinafter referred to), plus a spread of 213 basis points,

payable quarterly in arrears on February 1, May 1, August 1, and November 1 of each year through the Stated Maturity

Date or earlier redemption (each, a “Floating Rate Interest Payment Date,” and together with the Fixed Rate Interest

Payment Dates, the “Interest Payment Dates”), commencing on November 1, 2031, with such interest, in the case

of any interest payable on this 2036 Note on or prior to the First Reset Date, calculated on the basis of a 360-day year consisting of

twelve 30-day months, or, in the case of any interest payable on this 2036 Note after the First Reset Date, calculated on the basis of

the actual number of days in the Interest Period in respect of which interest is payable divided by 360. Notwithstanding the foregoing,

if Three-Month Term SOFR (or other applicable Benchmark) is less than zero, then Three-Month Term SOFR (or other such Benchmark) shall

be deemed to be zero. Dollar amounts resulting from that calculation will be rounded to the nearest cent, with one-half cent being rounded

upward. All percentages used in or resulting from any calculation of Three-Month Term SOFR (or, if different, the then-current Benchmark)

shall be rounded, if necessary, to the nearest one-hundred-thousandth of a percentage point, with 0.000005% rounded up to 0.00001%.

The interest so payable, and punctually paid or

duly provided for, on any Interest Payment Date will, as provided in, and subject to exceptions specified in, the Indenture, be paid

to the Person in whose name this 2036 Note, or any predecessor 2036 Note, is registered at the close of business on the Regular Record

Date for such Interest Payment Date.

A-2

Principal

and, in the case of redemption, interest, if any, due on the Stated Maturity Date or any earlier date of redemption of a 2036 Note shall

be payable against presentation and, if the final payment, surrender of this 2036 Note at the office or agency of the Company maintained

for such purpose, which shall initially be the Corporate Trust Office of U.S. Bank Trust Company, National Association, as Trustee,

located at 60 Livingston Avenue, St. Paul, MN 55107, Attn: Global Corporate Trust Services. Interest payable on an Interest Payment Date

will be made by wire transfer in immediately available funds or, at the option of the Company in the event that the 2036 Notes are not

represented by one or more Global Notes, by check mailed to the Person entitled thereto at such address as shall appear in the Security

Reference is hereby made to the further provisions

of this 2036 Note set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth

at this place.

Unless the certificate of authentication hereon

has been executed by the Trustee referred to on the reverse hereof by manual signature, this 2036 Note shall not be entitled to any benefit

under the Indenture or be valid or obligatory for any purpose.

[Signature Page Follows]

A-3

IN WITNESS WHEREOF, the Company has caused this

instrument to be duly executed.

ATLANTIC UNION BANKSHARES CORPORATION

By:

Name:

Title:

A-4

TRUSTEE’S CERTIFICATE OF AUTHENTICATION

This is one of the Securities of the series designated

herein referred to in the within-mentioned Indenture.

Dated:

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,

as Trustee

By:

Authorized Signatory

A-5

REVERSE OF 2036 NOTE

ATLANTIC UNION BANKSHARES CORPORATION

6.25% FIXED-TO-FLOATING RATE SUBORDINATED NOTE

DUE August 1, 2036

This

2036 Note is one of a duly authorized issue of Securities of the Company of a series designated as the “6.25% Fixed-to-Floating

Rate Subordinated Notes due August 1, 2036” (herein called the “2036 Notes”) initially issued in

an aggregate principal amount of Two-Hundred-Fifty-Million Dollars ($250,000,000) on July 30, 2026. Such series of Securities

has been established pursuant to the Indenture, dated as of December 5, 2016 (the “Base Indenture”), between

the Company and U.S. Bank Trust Company, National Association (as successor to U.S. Bank National Association), as Trustee (herein called

the “Trustee,” which term includes any successor trustee), as supplemented and amended by the Third Supplemental Indenture

between the Company and the Trustee, dated as of July 30, 2026 (the “Third Supplemental Indenture,” and together

with the Base Indenture, the “Indenture”), to which Indenture and any other indentures supplemental thereto reference

is hereby made for a statement of the respective rights, limitations of rights, duties, and immunities thereunder of the Company, the

Trustee, and the Persons in whose names 2036 Notes are registered on the Security Register from time to time and of the terms upon which

the 2036 Notes are, and are to be, authenticated and delivered. The terms of the 2036 Notes are those stated in the Indenture,

those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended, and those set forth in this 2036 Note.

To the extent that the terms of this 2036 Note modify, supplement, or are inconsistent with those of the Indenture, then the terms

of this 2036 Note shall govern to the extent such terms of this 2036 Note are not inconsistent with the terms made part of the Indenture

by reference to the Trust Indenture Act of 1939, as amended.

All capitalized terms used in this 2036 Note and

not defined herein that are defined in the Base Indenture or the Third Supplemental Indenture shall have the meanings assigned to them

in the Base Indenture or the Third Supplemental Indenture. If any capitalized term used and defined in this 2036 Note is also defined

in the Base Indenture or the Third Supplemental Indenture, in the event of any conflict in the meanings ascribed to such capitalized

term, the definition of the capitalized term in this 2036 Note shall control.

The indebtedness of the Company evidenced by the

2036 Notes, including the principal thereof and interest thereon, is subordinated in right of payment to all existing and future obligations

of the Company constituting Senior Indebtedness (as defined in the Base Indenture), on the terms and subject to the terms and conditions

as provided and set forth in Article 13 of the Base Indenture, shall rank junior in right of payment and upon the Company’s

liquidation to any of the Company’s existing and future general creditors; and shall rank at least equally in right of payment

with all other unsecured subordinated indebtedness of the Company, including securities issued pursuant to the Base Indenture the terms

of which provide that such Securities rank junior in right of payment to Senior Indebtedness. Each Holder of this 2036 Note, by

the acceptance hereof, agrees to and shall be bound by such provisions of the Indenture and authorizes and directs the Trustee on his

behalf to take such actions as may be necessary or appropriate to effectuate the subordination so provided.

A-6

The

2036 Notes are intended to be treated as Tier 2 capital (or its then-equivalent if the Company were subject to such capital requirement)

for purposes of capital adequacy guidelines of the Board of Governors of the Federal Reserve System (or, as and if applicable, the capital

adequacy rules or regulations of any appropriate successor federal banking agency) (the “Federal Reserve Board”)

as then in effect and applicable to the Company.

If an Event of Default with respect to 2036 Notes

shall occur and be continuing, the principal and interest owed on the 2036 Notes shall only become due and payable in accordance with

the terms and conditions set forth in Article 5 of the Base Indenture or Section 3.09 of the Third Supplemental Indenture.

Accordingly, the Holder of this 2036 Note has no right to accelerate the Maturity of this 2036 Note in the event the Company fails

to pay the principal of, or interest on, any of the 2036 Notes or fails to perform any other obligations under the 2036 Notes or in the

Indenture that are applicable to the 2036 Notes.

The Company may, at its option, redeem the 2036

Notes: (a) in whole or in part, beginning with the Interest Payment Date of August 1, 2031 and on any date thereafter, or (b) in

whole, but not in part, at any time following the occurrence of a Tax Event, Tier 2 Capital Event, or 1940 Act Event. Any such

redemption will be at a Redemption Price equal to 100% of the principal amount of the 2036 Notes to be redeemed, plus unpaid interest,

if any, accrued thereon to but excluding the Redemption Date fixed by the Company; provided, however, that the interest

due on an Interest Payment Date falling on or prior to the scheduled Redemption Date will be payable to the Holders thereof as of the

Regular Record Date for such Interest Payment Date. Any early redemption of the 2036 Notes by the Company will be subject to the receipt

of the prior approval of the Federal Reserve Board, to the extent then required under applicable laws or regulations, including capital

regulations.

The 2036 Notes are not entitled to the benefit

of, or subject to, any sinking fund.

The Indenture permits, with certain exceptions

as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders

of the Securities at any time by the Company and the Trustee with the consent of the Holders of a majority in aggregate principal amount

of the Securities of each series (each series voting as a class) affected thereby and at the time Outstanding. The Indenture also contains

provisions permitting the Holders of specified percentages in aggregate principal amount of the Securities of a series at the time Outstanding,

on behalf of the Holders of all Securities of such series, to waive certain past defaults under the Indenture and their consequences.

Any such consent or waiver by the Holder of this 2036 Note shall be conclusive and binding upon such Holder and upon all future Holders

of this 2036 Note and of any 2036 Note issued upon the registration of transfer hereof, in exchange herefor, or in lieu hereof, whether

or not notation of such consent or waiver is made upon this 2036 Note.

As provided in the Indenture and subject to certain

limitations herein and therein set forth, the transfer of this 2036 Note is registrable in the Security Register, upon surrender of this

2036 Note for registration of transfer at the office or agency of the Company in any place where the principal of, and interest on, this

2036 Note are payable, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the

Security Registrar duly executed by the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new 2036

Notes of this series, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee

or transferees.

A-7

The 2036 Notes shall not be convertible into,

or exchangeable for, any equity securities, other securities, or other assets of the Company or any Subsidiary.

Sections 4.03 and 4.04 of the Base Indenture

shall apply to the 2036 Notes. However, and in addition, any defeasance of the 2036 Notes pursuant to Sections 4.03 or 4.04 of the

Base Indenture shall be subject to the Company obtaining the prior approval of the Federal Reserve Board and any additional requirements

that the Federal Reserve Board may impose with respect to defeasance of the 2036 Notes. Notwithstanding the foregoing, if, due to a change

in law, regulation or policy subsequent to the date of this Third Supplemental Indenture, the Federal Reserve Board does not require

that defeasance of instruments be subject to Federal Reserve Board approval in order for the instrument to be accorded Tier 2 capital

treatment, then no such approval of the Federal Reserve Board will be required for such defeasance.

The 2036 Notes shall not be entitled to the benefit

of any security interest in, or collateralization by, any rights, property, or interest of the Company.

The 2036 Notes are issuable only in registered

form without coupons in denominations of $1,000 and any integral multiple of $1,000 in excess thereof.

The Company, the Trustee, and any agent of the

Company or the Trustee may treat the Person in whose name this 2036 Note is registered as the owner hereof for all purposes, whether

or not this 2036 Note is overdue, and neither the Company, the Trustee, nor any such agent shall be affected by notice to the contrary.

No reference herein to the Indenture and no provision

of this 2036 Note or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay

the principal of and interest (if any) on this 2036 Note at the times, place, and rate, and in the coin or currency, herein prescribed.

U.S.

Bank Trust Company, National Association will act as the Company’s principal Paying Agent with respect to the 2036 Notes

through its offices presently located at 60 Livingston Avenue, St. Paul, MN 55107, Attn: Global Corporate Trust Services. The Company

may at any time rescind the designation of a Paying Agent, appoint a successor Paying Agent, or approve a change in the office through

which any Paying Agent acts.

The Indenture contains provisions setting forth

certain conditions to the institution of proceedings by the Holders of 2036 Notes with respect to the Indenture or for any remedy under

the Indenture.

THE INDENTURE AND THE 2036 NOTES SHALL BE GOVERNED

BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

[End reverse side of Note]

A-8

ASSIGNMENT FORM

To assign the within Note, fill in the form below:

I or we assign and transfer the within Note to:

(Insert assignee’s legal name)

(Insert assignee’s social security or tax I.D. no.)

(Print or type assignee’s name, address, and zip code)

and irrevocably appoint as agent to transfer this Note on the books

of Atlantic Union Bankshares Corporation. The agent may substitute another to act for it.

Your Signature:

(Sign exactly as your name appears on the other side of this Note)

Your Name:

Date:

Signature Guarantee: *

* NOTICE: Signatures must be guaranteed by an

“eligible guarantor institution” meeting the requirements of the Security Registrar, which requirements include membership

or participation in the Security Transfer Agent Medallion Program (“STAMP”) or such other “signature guarantee program”

as may be determined by the Security Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange

Act of 1934, as amended.

A-9

SCHEDULE OF INCREASES OR DECREASES IN GLOBAL

NOTE

The initial outstanding principal amount of this

Global Note is Two-Hundred-Fifty-Million Dollars ($250,000,000). The following increases or decreases in the principal amount of this

Global Note have been made:

Date of

Increase

Decrease

Amount of

Decrease

Principal

Amount of this

Global Note

Amount of

Increase

in the

Principal

Amount of this

Global Note

Principal Amount

of this Global

Note following

such Decrease or

Increase

Signature of

Authorized

Signatory of

Trustee

A-10

EX-5.1 — EXHIBIT 5.1

EX-5.1

Filename: tm2621600d1_ex5-1.htm · Sequence: 3

Exhibit 5.1

Troutman Pepper Locke LLP

Troutman Pepper Locke Building, 1001 Haxall Point, 15th Floor

Richmond, VA 23219

troutman.com

July 30, 2026

Atlantic Union Bankshares Corporation

4300 Cox Road

Glen Allen, Virginia 23060

Ladies and Gentlemen:

We have acted as counsel to

Atlantic Union Bankshares Corporation, a Virginia corporation (the “Company”), in connection with the issuance

and sale to the Underwriters (as defined below) of $250,000,000 in aggregate principal amount of the Company’s 6.25% Fixed-to-Floating

Rate Subordinated Notes due 2036 (the “Notes”) pursuant to the terms of an Underwriting Agreement, dated

July 27, 2026 (the “Underwriting Agreement”), by and among the Company and Keefe, Bruyette & Woods,

Inc. and Piper Sandler & Co., as representatives of the several underwriters named in Schedule I therein (collectively, the “Underwriters”).

The Notes will be issued pursuant to the Subordinated Indenture dated as of December 5, 2016 (the “Base Indenture”),

between the Company and U.S. Bank Trust Company, National Association, a national banking association duly organized and existing under

the laws of the United States, as trustee (the “Trustee”), as supplemented by the Third Supplemental Indenture

dated as of July 30, 2026, between the Company and the Trustee (the “Third Supplemental Indenture”

and together with the Base Indenture, the “Indenture”).

This opinion is being furnished

in accordance with the requirements of Item 601(b)(5)(i) of Regulation S-K promulgated under the Securities Act of 1933, as amended (the

“Securities Act”).

In connection with our representation

of the Company, and as a basis for the opinions hereinafter set forth, we have examined originals, or copies certified or otherwise identified

to our satisfaction, of the following documents (hereinafter collectively referred to as the “Documents”):

The Registration Statement on Form S-3ASR (Registration No. 333-281290) (the “Registration Statement”), including

the (i) Prospectus dated August 6, 2024 therein, (ii) the Preliminary Prospectus Supplement, dated July 27, 2026, related to the offer

and sale of the Notes (the “Preliminary Prospectus Supplement”) and (iii) the Final Prospectus Supplement, dated

July 27, 2026, related to the offer and sale of the Notes (the “Final Prospectus Supplement”);

Atlantic

Union Bankshares Corporation

July 30, 2026

Page 2

2.                  The Amended and Restated Articles of Incorporation of the Company, as amended and supplemented through the date hereof (the “Articles

of Incorporation”), certified as of a recent date by the State Corporation Commission of the Commonwealth of Virginia (the

“SCC”);

The Amended and Restated Bylaws of the Company, as amended through the date hereof, certified as of a recent date by an officer of the

Company;

A certificate of the SCC as to the good standing of the Company, dated as of a recent date;

Resolutions adopted by the Board of Directors of the Company and the Pricing Committee of the Board of Directors of the Company, relating

to the offer and sale of the Notes (the “Resolutions”), certified by an officer of the Company as being complete,

accurate and in effect;

The Underwriting Agreement;

The Indenture;

The form of global note certificate evidencing the Notes; and

Such other documents, records, instruments, and matters as we have deemed necessary or appropriate to express the opinion set forth below,

subject to the assumptions, limitations and qualifications stated herein.

In expressing the opinions

set forth below, we have assumed the following:

Each individual executing or delivering any of the Documents, whether on behalf of such individual or another person, is legally competent

to do so;

Each individual executing or delivering any of the Documents on behalf of a party (other than the Company) is duly authorized to do so;

All Documents submitted to us as originals are authentic. The form and content of all Documents submitted to us as unexecuted drafts do

not differ in any respect relevant to this opinion from the form and content of such Documents as executed and delivered. All Documents

submitted to us as certified or photostatic copies conform to the original documents. All signatures on all Documents are genuine. All

public records reviewed or relied upon by us or on our behalf are true and complete. All statements and information contained in the Documents

are true and complete. There has been no oral or written modification of or amendment to any of the Documents, and there has been no waiver

of any provision of any of the Documents, by action or conduct of the parties or otherwise; and

Atlantic

Union Bankshares Corporation

July 30, 2026

Page 3

Based on the foregoing and in reliance thereon,

and subject to the limitations, qualifications, assumptions, exceptions and other matters set forth herein, we are of the opinion that

when the Notes have been duly authenticated by the Trustee and duly executed and delivered on behalf of the Company as contemplated by

the Indenture and upon receipt by the Company of the consideration to be paid therefor pursuant to the Underwriting Agreement, the Notes

will be legally issued and will constitute valid and binding obligations of the Company enforceable against the Company in accordance

with their terms.

Our opinion set forth above

is subject to applicable bankruptcy, insolvency, reorganization, fraudulent conveyance and transfer, moratorium or other laws now or hereafter

in effect relating to or affecting the rights or remedies of creditors generally and by general principles of equity (whether applied

in a proceeding at law or in equity) including, without limitation, standards of materiality, good faith and reasonableness in the interpretation

and enforcement of contracts, and the application of such principles to limit the availability of equitable remedies such as specific

performance.

The foregoing opinion is limited

to the substantive laws of the Commonwealth of Virginia and the State of New York, and we do not express any opinion herein concerning

any other law. We express no opinion as to compliance with any federal or state securities laws, including the securities laws of the

Commonwealth of Virginia and the State of New York, or as to federal or state laws regarding fraudulent transfers. We assume no obligation

to supplement this opinion letter if any applicable law changes after the date hereof or if we become aware of any fact that might change

the opinion expressed herein after the date hereof.

No opinion is rendered as

to matters not specifically referred to herein and under no circumstances are you to infer from anything stated or not stated herein any

opinion with respect to which such reference is not made.

This opinion is being furnished

to you for your submission to the Commission as an exhibit to a current report on Form 8-K (the “8-K”), to be

filed by the Company with the Commission on or about the date hereof, and its incorporation by reference into the Registration Statement.

We hereby consent to the filing of this opinion as an exhibit to the 8-K and to the use of the name of our firm therein and under the

section “Legal Matters” in the Preliminary Prospectus Supplement and Final Prospectus Supplement. In giving

this consent, we do not admit that we are within the category of persons whose consent is required by Section 7 of the Securities Act.

Very truly yours,

/s/ Troutman Pepper Locke LLP

TROUTMAN PEPPER LOCKE LLP

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Jul. 30, 2026

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

+ Details

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dei_DocumentInformationLineItems

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- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

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dei_DocumentPeriodEndDate

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dei_

Data Type:

xbrli:dateItemType

Balance Type:

Period Type:

duration

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:

dei_DocumentType

Namespace Prefix:

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Data Type:

dei:submissionTypeItemType

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- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

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dei_EntityAddressCityOrTown

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

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duration

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

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Data Type:

dei:stateOrProvinceItemType

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- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

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Data Type:

dei:centralIndexKeyItemType

Balance Type:

Period Type:

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- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

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duration

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

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Data Type:

dei:fileNumberItemType

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duration

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

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Data Type:

dei:edgarStateCountryItemType

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Period Type:

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- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

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- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

Period Type:

duration

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

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Data Type:

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- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

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Data Type:

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Balance Type:

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- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

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Namespace Prefix:

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- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

Period Type:

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- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

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Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

Period Type:

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- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

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Data Type:

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- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

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Namespace Prefix:

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Data Type:

dei:tradingSymbolItemType

Balance Type:

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- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

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