Fifth Supplemental Indenture by and between Capital Southwest Corporation and U.S. Bank Trust Company National Association (as successor in interest for U.S. Bank National Association), as trustee

THIS FIFTH SUPPLEMENTAL INDENTURE (this “Fifth Supplemental Indenture”), dated as of June 14, 2023, is between Capital Southwest Corporation, a Texas corporation (the “Company”), and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), as trustee (the “Trustee”). All capitalized terms used herein shall have the meaning set forth in the Base Indenture (as defined below).

The Company and the Trustee executed and delivered an Indenture, dated as of October 23, 2017 (the “Base Indenture” and, as supplemented by this Fifth Supplemental Indenture, the “Indenture”), to provide for the issuance by the Company from time to time of the Company’s unsecured debentures, notes or other evidences of indebtedness (the “Securities”), to be issued in one or more series as provided in the Indenture.

The Company desires to issue and sell $71,875,000 aggregate principal amount of the Company’s 7.75% Notes due 2028 (the “Notes”).

The Company previously entered into the First Supplemental Indenture, dated as of December 15, 2017 (the “First Supplemental Indenture”), the Second Supplemental Indenture, dated as of September 27, 2019 (the “Second Supplemental Indenture”), the Third Supplemental Indenture, dated as of December 29, 2020 (the “Third Supplemental Indenture”) and the Fourth Supplemental Indenture, dated as of August 27, 2021 (the “Fourth Supplemental Indenture”), each of which supplemented the Base Indenture.  The First Supplemental Indenture, the Second Supplemental Indenture, the Third Supplemental Indenture and the Fourth Supplemental Indenture are not applicable to the Notes.

Sections 9.01(iv) and 9.01(vi) of the Base Indenture provide that without the consent of Holders of the Securities of any series issued under the Indenture, the Company, when authorized by or pursuant to a Board Resolution, and the Trustee, at any time and from time to time, may enter into one or more indentures supplemental to the Base Indenture in form reasonably satisfactory to the Trustee to (i) change or eliminate any of the provisions of the Indenture when there is no Security Outstanding of any series created prior to the execution of the supplemental indenture that is entitled to the benefit of such provision and (ii) establish the form or terms of Securities of any series as permitted by Section 2.01 and Section 3.01 of the Base Indenture.

The Company desires to establish the form and terms of the Notes and to modify, alter, supplement and change certain provisions of the Base Indenture for the benefit of the Holders of the Notes (except as may be provided in a future supplemental indenture to the Indenture (each, a “Future Supplemental Indenture”)).

The Company has duly authorized the execution and delivery of this Fifth Supplemental Indenture to provide for the issuance of the Notes and all acts and things necessary to make this Fifth Supplemental Indenture a valid, binding, and legal obligation of the Company and to constitute a valid agreement of the Company, in accordance with its terms, have been done and performed.

NOW, THEREFORE, for and in consideration of the premises and the purchase of the Notes by the Holders thereof, it is mutually agreed, for the equal and proportionate benefit of all Holders of the Notes, as follows:

Section 1.01.Terms of the Notes. The following terms relating to the Notes are hereby established:

(b)The aggregate principal amount of the Notes that may be initially authenticated and delivered under the Indenture (except for Notes authenticated and delivered upon registration of, transfer of, or in exchange for, or in lieu of, other Notes pursuant to Sections 3.04, 3.05, 3.06, 9.06, 11.07 or 13.05 of the Base Indenture, and except for any Securities that, pursuant to Section 3.03 of the Base Indenture, are deemed never to have been authenticated and delivered under the Indenture) shall be $71,875,000. Under a Board Resolution, Officers’ Certificate pursuant to Board Resolutions or an indenture supplement, the Company may from time to time, without the consent of the Holders of Notes, issue additional Notes (in any such case “Additional Notes”) having the same ranking and the same interest rate, maturity and other terms as the Notes; provided that, if such Additional Notes are not fungible with the Notes (or any other tranche of Additional Notes) for U.S. federal income tax purposes, then such Additional Notes will have different CUSIP and ISIN numbers from the Notes (and any such other tranche of Additional Notes). Any Additional Notes and the existing Notes will constitute a single series under the Indenture and all references to the relevant Notes herein shall include the Additional Notes unless the context otherwise requires.

(e)The Notes shall be initially issuable in global form (each such Note, a “Global Note”). The Global Notes and the Trustee’s certificate of authentication thereon shall be substantially in the form of Exhibit A to this Fifth Supplemental Indenture. Each Global Note shall represent the aggregate amount of the outstanding Notes as shall be specified therein and each shall provide that it shall represent the aggregate amount of outstanding Notes from time to time endorsed thereon and that the aggregate amount of outstanding Notes represented thereby may from time to time be reduced or increased, as appropriate, to reflect exchanges and redemptions. Any endorsement of a Global Note to reflect the amount of any increase or decrease in the amount of outstanding Notes represented thereby shall be made by the Trustee or the Security Registrar, in accordance with Sections 2.03 and 3.05 of the Base Indenture.

(f)The depositary for such Global Notes (the “Depositary”) shall be The Depository Trust Company, New York, New York. The Security Registrar with respect to the Global Notes shall be the Trustee.

(g)The Notes shall be defeasible pursuant to Section 14.02 or Section 14.03 of the Base Indenture. Covenant defeasance contained in Section 14.03 of the Base Indenture shall apply to the covenants

contained in Sections 10.08, 10.09, and 10.10 of the Indenture. For the avoidance of doubt, Article IV of the Base Indenture also applies to the Notes.

(h)The Notes shall be redeemable pursuant to Section 11.01 of the Base Indenture and as follows:

(i)The Notes will be redeemable in whole or in part, at any time or from time to time, at the option of the Company, on or after August 1, 2025, at a Redemption Price equal to 100% of the outstanding principal amount thereof, plus accrued and unpaid interest payments otherwise payable for the then-current quarterly interest period accrued to, but excluding, the Redemption Date.

(ii)Notice of redemption shall be given in writing and mailed, first-class postage prepaid or by overnight courier guaranteeing next-day delivery, to each Holder of the Notes to be redeemed, not less than thirty (30) nor more than sixty (60) days prior to the Redemption Date, at the Holder’s address appearing in the Security Register. All notices of redemption shall contain the information set forth in Section 11.04 of the Base Indenture.

(iii)Any exercise of the Company’s option to redeem the Notes will be done in compliance with the Indenture and the Investment Company Act, to the extent applicable.

(iv)If the Company elects to redeem only a portion of the Notes, the Trustee or, with respect to the Global Notes, the Depositary will determine the method for selecting the particular Notes to be redeemed, in accordance with Section 11.03 of the Indenture and the Investment Company Act and the rules of any national securities exchange or quotation system on which the Notes are listed, in each case to the extent applicable.

(v)Unless the Company defaults in payment of the Redemption Price, on and after the Redemption Date, interest will cease to accrue on the Notes called for redemption hereunder.

(i)The Notes shall not be subject to any sinking fund pursuant to Section 12.01 of the Base Indenture.

(j)The Notes shall be issuable in denominations of $25 and integral multiples of $25 in excess thereof.

(k)Holders of the Notes will not have the option to have the Notes repaid prior to the Stated Maturity other than in accordance with Article XIII of the Indenture.

(l)The Notes are hereby designated as “Senior Securities” under the Indenture.

“‘Exchange Act’ means the Securities Exchange Act of 1934, as amended, and any statute successor thereto.”

“‘GAAP’ means generally accepted accounting principles in the United States set forth in the opinions and pronouncements of the Accounting Principles Board of the American Institute of Certified Public Accountants, the opinions and pronouncements of the Public Company Accounting Oversight Board and the statements and pronouncements of the Financial Accounting Standards Board or in such other statements by such other entity as have been approved by a significant segment of the accounting profession in the United States, which are in effect from time to time.”

“‘Investment Company Act’ means the Investment Company Act of 1940, as amended, and the rules, regulations and interpretations promulgated thereunder, to the extent applicable, and any statute successor thereto.”

“If an Event of Default (other than an Event of Default under Section 5.01(v) or Section 5.01(vi)) with respect to the Notes at the time Outstanding occurs and is continuing, then and in every such case the Trustee or the Holders of not less than 25% in principal amount of the Outstanding Notes may (and the Trustee shall at the written request of such Holders) declare the principal of all the 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 or specified portion thereof shall become immediately due and payable, but does not entitle any Holder to any redemption payout or redemption premium. If an Event of Default under Section 5.01(v) or Section 5.01(vi) occurs, the entire principal amount of all the Notes will automatically become due and immediately payable.”

“Notwithstanding any of the foregoing and subject to the Investment Company Act, any Subsidiary of the Company may consolidate with, merge into or transfer all or part of its property and assets to other Subsidiaries of the Company or to the Company. Additionally, this covenant shall not apply to: (1) the Company’s merger or the merger of one of the Company’s Subsidiaries with an Affiliate solely for the purpose of reincorporating in another jurisdiction; (2) any conversion by the Company or a Subsidiary of the Company from an entity formed under the laws of one state to any entity formed under the laws of another state; or (3) any combination of (1) and (2) above.”

“Section 10.08. Section 18(a)(1)(A) of the Investment Company Act.

The Company hereby agrees that for the period of time during which the Notes are Outstanding, the Company will not violate Section 18(a)(1)(A) as modified by Section 61(a)(2) of the Investment Company Act or any successor provisions thereto, whether or not the Company continues to be subject to such provisions of the Investment Company Act, but giving effect, in either case, to any exemptive relief granted to the Company by the Commission.”

“Section 10.09. Section 18(a)(1)(B) of the Investment Company Act.

The Company hereby agrees that, for the period of time during which the Notes are Outstanding, the Company will not violate Section 18(a)(1)(B) as modified by Section 61(a)(2) of the Investment Company Act or any successor provisions thereto, whether or not the Company is subject to such provisions of the Investment Company Act, and after giving effect to any exemptive relief granted to the Company by the Commission, except that the Company may declare a cash dividend or distribution, notwithstanding the prohibition contained in Section 18(a)(1)(B) as modified by Section 61(a)(2) of the Investment Company Act or any successor provisions thereto, but only up to such amount as is necessary in order for the Company to maintain its status as a regulated investment company under Subchapter M of the Internal Revenue Code of 1986; provided, however, that the prohibition in this Section 10.09 shall not apply until such time as the Company’s asset coverage has been below the minimum asset coverage required pursuant to Section 18(a)(1)(B) as modified by Section 61(a)(2) of the Investment Company Act

or any successor provisions thereto (after giving effect to any exemptive relief granted to the Company by the Commission) for more than six (6) consecutive months.”

“Section 10.10. Commission Reports and Reports to Holders.

If, at any time, the Company is not subject to the reporting requirements of Sections 13 or 15(d) of the Exchange Act to file any periodic reports with the Commission, the Company agrees to furnish to the Holders of the Notes and the Trustee for the period of time during which the Notes are Outstanding: (i) within 90 days after the end of the each fiscal year of the Company, audited annual consolidated financial statements of the Company and (ii) within 45 days after the end of each fiscal quarter of the Company (other than the Company’s fourth fiscal quarter), unaudited interim consolidated financial statements of the Company. All such financial statements shall be prepared, in all material respects, in accordance with applicable GAAP.”

“If less than all the Securities of any series issued on the same day with the same terms are to be redeemed, the particular Securities to be redeemed shall be selected by the Trustee, or by the Depositary in the case of global Securities, in compliance with the requirements of DTC, from the Outstanding Securities of such series issued on such date with the same terms not previously called for redemption, in compliance with the requirements of the principal national securities exchange on which the Securities are listed (if the Securities are listed on any national securities exchange), or if the Securities are not held through DTC or listed on any national securities exchange, or DTC prescribed no method of selection, by such method as the Trustee shall deem fair and appropriate and subject to and otherwise in accordance with the procedures of the applicable Depositary; provided that such method complies with the rules of any national securities exchange or quotation system on which the Securities are listed (which rules shall be certificated to the Trustee by the Company or such national securities exchange at the Trustee’s request), and may provide for the selection for redemption of portions (equal to the minimum authorized denomination for Securities of that series or any integral multiple thereof) of the principal amount of Securities of such series of a denomination larger than the minimum authorized denomination for Securities of that series; provided, however, that no such partial redemption shall reduce the portion of the principal amount of a Security not redeemed to less than the minimum authorized denomination for Securities of such series.”

“(vi) The Company shall have delivered to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that all conditions precedent to either the defeasance under Section 14.02 or the covenant defeasance under Section 14.03 (as the case may be) have been complied with and an Opinion of Counsel to the effect that as a result of a deposit pursuant to subsection (i) above and the related exercise of the Company’s option under Section 14.02 or Section 14.03 (as the case may be), registration is not required under the Investment Company Act by the Company, with respect to the trust funds representing such deposit or by the trustee for such trust funds.”

This Security is a Global Note within the meaning of the Indenture hereinafter referred to and is registered in the name of The Depository Trust Company or a nominee thereof. This Security may not be exchanged in whole or in part for a Security registered, and no transfer of this Security in whole or in part may be registered, in the name of any Person other than The Depository Trust Company or a nominee thereof, except in the limited circumstances described in the Indenture.

Unless this certificate is presented by an authorized representative of The Depository Trust Company to the issuer or its agent for registration of transfer, exchange or payment and such certificate issued in exchange for this certificate is registered in the name of Cede & Co., or such other name as requested by an authorized representative of The Depository Trust Company, any transfer, pledge or other use hereof for value or otherwise by or to any person is wrongful, as the registered owner hereof, Cede & Co., has an interest herein.

Capital Southwest Corporation, a corporation duly organized and existing under the laws of Texas (herein called the “Company,” which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co., or registered assigns, the principal sum of (U.S. $ ) on August 1, 2028, and to pay interest thereon from June 14, 2023 or from the most recent Interest Payment Date to which interest has been paid or duly provided for, quarterly on February 1, May 1, August 1 and November 1 in each year, commencing August 1, 2023, at the rate of 7.75% per annum, until the principal hereof is paid or made available for payment. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Security is registered at the close of business on the Regular Record Date for such interest, which shall be January 15, April 15, July 15 and October 15 (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Regular Record Date and may either be paid to the Person in whose name this Security is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Securities of this series not less than 10 days prior to such Special Record Date, or be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture. This Security may be issued as part of a series.

Payment of the principal of (and premium, if any, on) and any such interest on this Security will be made at the office of the Trustee located at 100 Wall Street, Suite 1600, New York, New York 10005, Attention: Capital Southwest Corporation (7.75% Notes Due 2028) and at such other address as designated by the Trustee, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided, however, that at the option of the Company payment of interest may be made by check mailed to the address of the Person entitled thereto as such address shall appear in the Security Register; provided, further, however, that so long as this Security is registered to Cede & Co., such payment will be made by wire transfer in accordance with the procedures established by The Depository Trust Company and the Trustee.

Reference is hereby made to the further provisions of this Security 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 Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

This Security is one of a duly authorized issue of Senior Securities of the Company (herein called the “Securities”), issued and to be issued in one or more series under an Indenture, dated as of October 23, 2017 (herein called the “Base Indenture”, which term shall have the meaning assigned to it in such instrument), between the Company and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), as Trustee (herein called the “Trustee”, which term includes any successor trustee under the Base Indenture), and reference is hereby made to the Base Indenture for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee, and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered, as supplemented by the Fifth Supplemental Indenture relating to the Securities, dated June 14, 2023, by and between the Company and the Trustee (herein called the “Fifth Supplemental Indenture”; the Fifth Supplemental Indenture and together with the Base Indenture, collectively are herein called the “Indenture”). In the event of any conflict between the Base Indenture and the Fifth Supplemental Indenture, the Fifth Supplemental Indenture shall govern and control.

This Security is one of the series designated on the face hereof, which series is initially limited in aggregate principal amount to $ (or up to $ aggregate principal amount if the underwriters’ option to purchase additional Securities is exercised in full). Under a Board Resolution, Officers’ Certificate pursuant to Board Resolutions or an indenture supplement, the Company may from time to time, without the consent of the Holders of Securities, issue additional Securities of this series (in any such case “Additional Securities”) having the same ranking and the same interest rate, maturity and other terms as the Securities; provided that, if such Additional Securities are not fungible with the Securities (or any other tranche of Additional Securities for U.S. federal income tax purposes), then such Additional Securities will have different CUSIP and ISIN numbers from the Securities (and any such other tranche of Additional Securities). Any Additional Securities and the existing Securities will constitute a single series under the Indenture and all references to the relevant Securities herein shall include the Additional Securities unless the context otherwise requires. The aggregate amount of outstanding Securities represented hereby may from time to time be reduced or increased, as appropriate, to reflect exchanges and redemptions.

The Securities of this series are subject to redemption in whole or in part, at any time or from time to time, at the option of the Company, on or after August 1, 2025, at a Redemption Price per Security equal to 100% of the outstanding principal amount thereof, plus accrued and unpaid interest payments otherwise payable for the then-current quarterly interest period accrued to, but excluding, the Redemption Date.

Notice of redemption shall be given in writing and mailed, first-class postage prepaid or by overnight courier guaranteeing next-day delivery, to each Holder of the Securities to be redeemed, not less than thirty (30) nor more than sixty (60) days prior to the Redemption Date, at the Holder’s address appearing in the Security Register. All notices of redemption shall contain the information set forth in Section 11.04 of the Base Indenture.

Any exercise of the Company’s option to redeem the Securities will be done in compliance with the Indenture and the Investment Company Act, to the extent applicable.

If the Company elects to redeem only a portion of the Securities, the Trustee or, with respect to global Securities, the Depositary will determine the method for selecting the particular Securities to be redeemed, in accordance with Section 1.01 of the Fifth Supplemental Indenture and Section 11.03 of the Indenture. In the event of redemption of this Security in part only, a new Security or Securities of this series and of like tenor for the unredeemed portion hereof will be issued in the name of the Holder hereof upon the cancellation hereof.

Unless the Company defaults in payment of the Redemption Price, on and after the Redemption Date, interest will cease to accrue on the Securities called for redemption.

The Indenture contains provisions for defeasance at any time of the entire indebtedness of this Security or certain restrictive covenants and Events of Default with respect to this Security, in each case upon compliance with certain conditions set forth in the Indenture.

If an Event of Default with respect to Securities of this series shall occur and be continuing (other than Events of Default under Section 5.01(v) or Section 5.01(vi) of the Indenture), the principal of the Securities of this series may be declared due and payable in the manner and with the effect provided in the Indenture. If an Event of Default under Section 5.01(v) or Section 5.01(vi) of the Indenture occurs, the entire principal amount of the Securities of this series will automatically become due and immediately payable.

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 of each series to be affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders of not less than a majority in principal amount of the Securities at the time Outstanding of each series to be affected. The Indenture also contains provisions permitting the Holders of specified percentages in principal amount of the Securities of each series at the time Outstanding, on behalf of the Holders of all Securities of such series, to waive compliance by the Company with certain provisions of the Indenture and certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer hereof or in exchange herefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Security.

As provided in and subject to the provisions of the Indenture, the Holder of this Security shall not have the right to institute any proceeding with respect to the Indenture or for the appointment of a receiver or trustee or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice of a continuing Event of Default (other than an Event of Default under Section 5.01(v) or Section 5.01(vi) of the Indenture) with respect to the Securities of this series, the Holders of not less than 25% in principal amount of the Securities of this series at the time Outstanding shall have made written request to the Trustee to institute proceedings in respect of such Event of Default as Trustee and offered the Trustee reasonable indemnity against the costs, expenses and liabilities to be incurred in compliance with such request, and the Trustee shall not have received from the Holders of a majority in principal amount of Securities of this series at the time Outstanding a direction inconsistent with such request, and shall have failed to institute any such proceeding, for sixty (60) days after receipt of such notice, request and offer of indemnity. The foregoing shall not apply to any suit instituted by the Holder of this Security for the enforcement of any payment of principal hereof or any premium or interest hereon on or after the respective due dates expressed herein.

No reference herein to the Indenture and no provision of this Security or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and any premium and interest on this Security at the times, place and rate, and in the coin or currency, herein prescribed.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Security is registrable in the Security Register, upon surrender of this Security for registration of transfer at the office or agency of the Company in any place where the principal of and any premium and interest on this Security 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 Securities of this series and of like tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

The Securities of this series are issuable only in registered form without coupons in denominations of $25 and any integral multiples of $25 in excess thereof. As provided in the Indenture and subject to certain limitations therein set forth, Securities of this series are exchangeable for a like aggregate principal amount of Securities of this series and of like tenor of a different authorized denomination, as requested by the Holder surrendering the same.

No service charge shall be made for any such registration of transfer or exchange of Securities, but the Company or the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Prior to due presentment of this Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee shall treat the Person in whose name this Security is registered as the owner hereof for all purposes, whether or not this Security be overdue, and none of the Company, the Trustee or any agent thereof shall be affected by notice to the contrary.

All terms used in this Security which are defined in the Indenture shall have the meanings assigned to them in the Indenture.

To the extent any provision of this Security conflicts with the express provisions of the Indenture, the provisions of the Indenture shall govern and be controlling.

The Indenture and this Security shall be governed by and construed in accordance with the laws of the State of New York, without regard to principles of conflicts of laws.