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Item 1.02 Termination of a Material Definitive Agreement.

Effective as of July 10, 2009, Main Street Capital Corporation (“Main Street”) unilaterally exercised its right to terminate the Treasury Secured Revolving Credit Agreement (the “Treasury Credit Agreement”) entered into on December 31, 2007 among Main Street, as borrower, Main Street Capital Partners, LLC, as initial guarantor, Wachovia Bank, National Association and Branch Banking and Trust Company (“BB&T”), as lenders, and BB&T, as administrative agent for the lenders. Main Street unilaterally terminated the Treasury Credit Agreement in order to eliminate the unused commitment fees that would have been paid under this facility over its remaining term. Main Street did not intend to renew the Treasury Credit Facility at its maturity date of December 31, 2009 based upon the funding available from its recent follow on equity offering, funding availability under its separate $30,000,000, three-year investment credit facility entered into on October 24, 2008 (the “Credit Agreement”), and additional funding capacity available through participation in the Small Business Investment Company program.

Under the Treasury Credit Agreement, the lenders had agreed to extend revolving loans to Main Street in an amount not to exceed $50,000,000 (reduced from $100,000,000 unilaterally by Main Street on October 24, 2008) to provide flexibility in the sizing of portfolio investments and to facilitate the growth of Main Street’s investment portfolio. The Treasury Credit Agreement had an original maturity date of December 31, 2009 and advances accrued interest, at Main Street’s option, either (i) at the LIBOR rate or (ii) at a published prime rate of interest, plus 25 basis points in each case, subject to increase for outstanding advances in excess of 50% of the days within a given calendar quarter. The Treasury Credit Agreement also required payment of 15 basis points per annum in unused commitment fees based on average daily unused balances under the facility. The Treasury Credit Agreement was also secured by certain securities accounts maintained by BB&T and was also guaranteed by certain of Main Street’s subsidiaries. On the date of termination, Main Street did not have any outstanding borrowings under the Treasury Credit Agreement and was in compliance with all covenants of the Treasury Credit Agreement. Main Street will not incur any additional fees or penalties for terminating the facility prior to its maturity date.

BB&T is a lender and the administrative agent under the Credit Agreement. In addition, BB&T and the other lenders under the Treasury Credit Agreement and the Credit Agreement, and their respective affiliates, may from time to time receive customary fees and expenses in the performance of investment banking, financial advisory or other services for Main Street.

The above summary is not complete and is qualified in its entirety to the full text of the Treasury Credit Agreement.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

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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.

Main Street Capital Corporation

Date: July 10, 2009

By: /s/ Rodger A. Stout                                     
Name: Rodger A. Stout
Title: Chief Compliance Officer

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Exhibit Index

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