Main Street Capital Corporation
1300 Post Oak Boulevard, Suite 800
Houston, TX 77056
(713) 350-6000
July 19, 2011
U.S. Securities and Exchange Commission
100 F Street, N.E.
Washington, DC 20549
Attn: James E. OConnor, Esq.
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 | Re: | Main Street Capital Corporation | 
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 | Registration Statement on Form N-2 (File No. 333-173674) | 
Dear Mr. OConnor:
In accordance with Rule 461 of the General Rules and Regulations under the Securities Act of 1933, as amended, Main Street Capital Corporation hereby respectfully requests that the above-captioned registration statement, including all amendments thereto, be ordered effective on July 20, 2011, at 3:00 p.m., or as soon thereafter as practicable.
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 | Main Street Capital Corporation | |
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 | By: | /s/ Jason B. Beauvais | 
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 | Jason B. Beauvais | 
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 | Vice President, General Counsel and Secretary |