Exhibit 10.1

EXECUTION COPY

EIGHTH AMENDMENT TO THIRD AMENDED AND RESTATED CREDIT

AGREEMENT

This EIGHTH AMENDMENT TO THIRD AMENDED AND RESTATED

CREDIT AGREEMENT, dated as of March 12, 2026 (this “Amendment”), by and among MAIN

STREET CAPITAL CORPORATION, a Maryland corporation (the “Borrower”), solely with

respect to Section 9, the GUARANTORS party hereto, the LENDERS party hereto (the “Lenders”)

and TRUIST BANK, as Administrative Agent (in such capacity, the “Administrative Agent”).

R E C I T A L S:

WHEREAS, the Borrower, the Guarantors, the Administrative Agent and the

lenders party thereto have entered into that certain Third Amended and Restated Credit Agreement

dated as of June 5, 2018 (as amended by that certain First Amendment to Third Amended and

Restated Credit Agreement, dated as of May 28, 2020, that certain Omnibus Amendment No. 1,

dated as of April 7, 2021, that certain Third Amendment to Third Amended and Restated Credit

Agreement, dated as of August 4, 2022, that certain Fourth Amendment to Third Amended and

Restated Credit Agreement, dated as of December 22, 2022, that certain Fifth Amendment to Third

Amended and Restated Credit Agreement, dated as of May 26, 2024, that certain Sixth

Amendment to Third Amended and Restated Credit Agreement, dated as of June 27, 2024, and

that certain Seventh Amendment to Third Amended and Restated Credit Agreement, dated as of

April 30, 2025, the “Existing Credit Agreement”, and, as amended by this Amendment, the “Credit

Agreement”). Capitalized terms used in this Amendment that are not otherwise defined in this

Amendment shall have the respective meanings assigned to them in the Credit Agreement.

WHEREAS, the Borrower has requested that the Administrative Agent and the

Lenders amend the Existing Credit Agreement. Pursuant to and in accordance with Section 9.05

of the Existing Credit Agreement, the Lenders, the Administrative Agent and the Borrower desire

to amend the Existing Credit Agreement upon the terms and conditions hereinafter set forth.

NOW, THEREFORE, in consideration of the Recitals and the mutual promises

contained herein and for other good and valuable consideration, the receipt and sufficiency of

which are hereby acknowledged, the Borrower, the Administrative Agent and the Lenders,

intending to be legally bound hereby, agree as follows:

SECTION 1. Recitals. The recitals (the “Recitals”) are incorporated herein by

reference and shall be deemed to be a part of this Amendment.

SECTION 2. Amendment to Existing Credit Agreement. Subject to the

occurrence of the Effective Date (as hereinafter defined), the parties hereto hereby agree that the

Existing Credit Agreement is amended as follows:

(a)

Clause (g)(ii)(A) of Section 5.31 of the Existing Credit Agreement is hereby

amended by replacing the amount “$500,000,000” with the amount “$700,000,000” where it

appears therein; and

(b)

The definition of “Existing Debt” in the Existing Credit Agreement is

hereby deleted in its entirety and replaced with the following:

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Exhibit 10.1

““Existing Debt” means (a) the Debt evidenced by Borrower’s 6.95% Notes due

2029, (b) the Debt evidenced by Borrower’s 5.40% Notes due 2028, (c) the Debt

evidenced by Borrower’s 6.50% Notes due 2027, and (d) the Debt evidenced by

Borrower’s 3.00% Notes due 2026.”

SECTION 3.  [Reserved.]

SECTION 4. Conditions to Effectiveness. The effectiveness of this Amendment

and the obligations of the Lenders hereunder shall occur on such date (the “Effective Date”) that

the following conditions have been satisfied or waived:

(a)

The Borrower shall have delivered to the Administrative Agent the

following, in form and substance reasonably satisfactory to the Administrative Agent:

(i)

from each party hereto either (A) a counterpart of this Amendment signed

on behalf of such party or (B) written evidence satisfactory to the Administrative Agent

(which may include telecopy or electronic transmission of a signed signature page to this

Amendment) that such party has signed a counterpart of this Amendment; and

(ii)

such other documents or items that the Administrative Agent, the Lenders

or their counsel may reasonably request.

(b)

The Borrower shall have paid (i) to the Administrative Agent, upon

application with appropriate documentation, all reasonable and documented out-of-pocket costs

and expenses of the Administrative Agent, including reasonable and documented out-of-pocket

fees, charges and disbursements of counsel for the Administrative Agent, incurred in connection

with this Amendment and the transactions contemplated herein, in each case, to the extent required

by and subject to the terms and limitations of Section 9.03 of the Credit Agreement and (ii) to the

Administrative Agent any fees due and owing by the Borrower to the Lenders and Administrative

Agent as of the date hereof.

SECTION 5. No Other Amendment. Except for the amendments set forth in this

Amendment, the text of the Existing Credit Agreement shall remain unchanged and in full force

and effect. On and after the Effective Date, all references to the Credit Agreement in each of the

Loan Documents shall hereafter mean the Existing Credit Agreement as amended by this

Amendment. It is the intention of each of the parties hereto that the Existing Credit Agreement be

amended hereunder so as to preserve the perfection and priority of all Liens securing the

“Obligations” under the Loan Documents and that all “Obligations” of the Borrower under the

Existing Credit Agreement shall continue to be secured by Liens evidenced under the Collateral

Documents, and this Amendment is not intended to effect, nor shall it be construed as, a novation.

The Existing Credit Agreement and this Amendment shall be construed together as a single

agreement. This Amendment shall constitute a Loan Document under the terms of the Credit

Agreement. The Lenders and the Administrative Agent do hereby reserve all of their rights and

remedies against all parties who may be or may hereafter become secondarily liable for the

repayment of the Obligations. The Borrower promises and agrees to perform all of the

requirements, conditions, agreements and obligations under the terms of the Credit Agreement, as

heretofore and hereby amended, and the other Collateral Documents and the other Loan

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Exhibit 10.1

Documents being hereby ratified and affirmed. The Borrower hereby expressly agrees that the

Credit Agreement, as heretofore and hereby amended, the Collateral Documents and the other

Loan Documents are in full force and effect.

SECTION 6. Representations and Warranties. The Borrower hereby represents

and warrants to the Administrative Agent and each of the Lenders as follows:

(a)

No Default or Event of Default has occurred and is continuing on the date

hereof immediately before giving effect to this Amendment, or shall immediately result therefrom.

(b)

The Borrower has the power and authority to enter into this Amendment

and to do all such acts and things as are required or contemplated hereunder or thereunder to be

done, observed and performed by it.

(c)  The execution, delivery and performance of this Amendment has been duly

authorized by all necessary Organizational Action of the Borrower and this Amendment

constitutes a valid and binding agreement of the Borrower enforceable against it in accordance

with its terms, provided that the enforceability hereof is subject in each case to general principles

of equity (regardless of whether such enforceability is considered in a proceeding in equity or at

law) and to bankruptcy, insolvency and similar laws affecting the enforcement of creditors’ rights

generally.

(d)  The execution and delivery of this Amendment and the performance by the

Borrower hereunder requires no action by or in respect of, or filing with, any Governmental

Authority that has not been obtained or made when required, and do not contravene, or constitute

a default under, any provision of applicable law or regulation or of the Organizational Documents

and Operating Documents of the Borrower or of any agreement, judgment, injunction, order,

decree or other instrument binding upon the Borrower.

(e)

The representations and warranties of the Borrower as set forth in the Loan

Documents, as applicable, are true and correct in all material respects (except those representations

and warranties qualified by materiality or by reference to a material adverse effect, which are true

and correct in all respects) on and as of the date hereof as though made on and as of the date hereof

(unless such representations and warranties specifically refer to a previous day, in which case, they

shall be complete and correct in all material respects (or, with respect to such representations or

warranties qualified by materiality or by reference to a material adverse effect, complete and

correct in all respects) on and as of such previous day).

SECTION 7. Counterparts; Governing Law. This Amendment may be executed

in counterparts (and by different parties hereto in different counterparts), each of which shall

constitute an original, but all of which when taken together shall constitute a single contract.

Delivery of an executed counterpart of a signature page of this Amendment by facsimile shall be

effective as delivery of a manually executed counterpart of this Agreement. The words

“execution,” “signed,” “signature,” and words of like import shall be deemed to include electronic

signatures or the keeping of records in electronic form, each of which shall be of the same legal

effect, validity or enforceability as a manually executed signature or the use of a paper-based

recordkeeping system, as the case may be, to the extent and as provided for in any applicable law,

1758071084 21672061

Exhibit 10.1

including the Federal Electronic Signatures in Global and National Commerce Act, the New York

State Electronic Signatures and Records Act, or any other similar state laws based on the Uniform

Electronic Transactions Act. This Amendment shall be construed in accordance with and governed

by the law of the State of New York.

SECTION 8. Amendment. This Amendment may not be amended or modified

without the written consent of the Lenders required under Section 9.05 of the Credit Agreement

and the Administrative Agent.

SECTION 9. Consent by Guarantors. The Guarantors consent to the foregoing

amendments. The Guarantors promise and agree to perform all of the requirements, conditions,

agreements and obligations under the terms of the Existing Credit Agreement, as hereby amended,

the Collateral Documents and the other Loan Documents to which they are party, said Existing

Credit Agreement, as hereby amended, the Collateral Documents and such other Loan Documents

being hereby ratified and affirmed. The Guarantors hereby expressly agree that the Existing Credit

Agreement, as hereby amended, the Collateral Documents and the other Loan Documents are in

full force and effect.

SECTION 10. Severability. In case any one or more of the provisions contained in

this Amendment should be invalid, illegal or unenforceable in any respect, the validity, legality

and enforceability of the remaining provisions contained herein shall not in any way be affected

or impaired thereby and shall be enforced to the greatest extent permitted by law.

SECTION 11. Notices. All notices, requests and other communications to any

party to the Loan Documents, as amended hereby, shall be given in accordance with the terms of

Section 9.01 of the Credit Agreement.

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1758071084 21672061

Exhibit 10.1

IN WITNESS WHEREOF, the parties hereto have executed and delivered, or have caused

their respective duly authorized officers and representatives to execute and deliver, this

Amendment as of the day and year first above written.

		MAIN STREET CAPITAL CORPORATION, as
		Borrower
		By:	/s/ Ryan Nelson
		Name:	Ryan Nelson
		Title:	Chief Financial Officer and Treasurer

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		TRUIST BANK
		as Administrative Agent and a Lender
		By:	/s/ Hays Wood
		Name:	Hays Wood
		Title:	Managing Director

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		THE HUNTINGTON NATIONAL BANK,
		as a Lender
		By:	/s/ Greg Williamson
		Name:	Greg Williamson
		Title:	Managing Director

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		SUMITOMO MITSUI BANKING CORPORATION,
		as a Lender
		By:	/s/ Shane Klein
		Name:	Shane Klein
		Title:	Managing Director

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		FROST BANK,
		as a Lender
		By:	/s/ Jake Fitzpatrick
		Name:	Jake Fitzpatrick
		Title:	Senior Vice President

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		CADENCE BANK,
		as a Lender
		By:	/s/ Greg Williamson
		Name:	Greg Williamson
		Title:	Managing Director

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		ROYAL BANK OF CANADA,
		as a Lender
		By:	/s/ Lucas Labercane
		Name:	Lucas Labercane
		Title:	Authorized Signatory

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		ZIONS BANCORPORATION, N.A. dba AMEGY BANK,
		as a Lender
		By:	/s/ Brad Ellis
		Name:	Brad Ellis
		Title:	Senior Vice President

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		HANCOCK WHITNEY BANK,
		as a Lender
		By:	/s/ Katie Sandoval
		Name:	Katie Sandoval
		Title:	Senior Vice President

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		TRUSTMARK BANK, NA
		as a Lender
		By:	/s/ Jon Deutsch
		Name:	Jon Deutsch
		Title:	SVP

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		VERITEX COMMUNITY BANK,
		as a Lender
		By:	/s/ Greg Williamson
		Name:	Greg Williamson
		Title:	Managing Director

(SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		FIFTH THIRD BANK, N.A.,
		successor by merger to Comerica Bank, a Texas banking association,
		as a Lender
		By:	/s/ Joshua Huse
		Name:	Joshua Huse
		Title:	Vice President

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		FIRST-CITIZENS BANK & TRUST COMPANY,
		as a Lender
		By:	/s/ Robert Klein
		Name:	Robert Klein
		Title:	Managing Director

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Internal

Exhibit 10.1

		RAYMOND JAMES BANK,
		as a Lender
		By:	/s/ Camilo Rincon
		Name:	Camilo Rincon
		Title:	Vice President

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		WOODFOREST NATIONAL BANK,
		as a Lender
		By:	/s/ Trey McCord
		Name:	Trey McCord
		Title:	Executive Vice President

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		FIRST NATIONAL BANK OF PENNSYLVANIA, as a Lender
		By:	/s/ Khushi Kantawala
		Name:	Khushi Kantawala
		Title:	Vice President

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		FIRST FINANCIAL BANK,
		as a Lender
		By:	/s/ Matthew J. Sylvia
		Name:	Matthew J. Sylvia
		Title:	EVP

[SIGNATURE PAGE TO EIGHTH AMENDMENT]

Exhibit 10.1

		Acknowledged and Agreed, solely with respect to
		Section 9:
		GUARANTORS:
		MAIN STREET CAPITAL PARTNERS, LLC
		By:	/s/ Ryan Nelson
		Name:	Ryan Nelson
		Title:	Chief Financial Officer and Treasurer
		MAIN STREET EQUITY INTERESTS, INC.
		By:	/s/ Ryan Nelson
		Name:	Ryan Nelson
		Title:	Chief Financial Officer and Treasurer
		MAIN STREET CA LENDING, LLC
		By:	/s/ Ryan Nelson
		Name:	Ryan Nelson
		Title:	Chief Financial Officer and Treasurer

[SIGNATURE PAGE TO EIGHTH AMENDMENT]