Main Street Capital Announces First Quarter 2010 Earnings Release and Conference Call Schedule

HOUSTON, April 27 /PRNewswire-FirstCall/ -- Main Street Capital Corporation (Nasdaq: MAIN) ("Main Street") today announced it will release first quarter 2010 financial results on Thursday, May 6, 2010, after the financial markets close.  In conjunction with the first quarter 2010 earnings release, Main Street has scheduled a conference call for Friday, May 7, 2010 at 10:00 a.m. Eastern Time.

What:  Main Street Capital First Quarter 2010 Earnings Conference Call

When:  Friday, May 7, 2010 – 10:00 a.m. Eastern Time

How:   Live via phone by dialing 480-629-9819 or 877-941-8610 and quote
       passcode #4289345 at least 10 minutes prior to the start time, or via
       simultaneous webcast by logging into the investor relations section of
       the company's web address below.

Where: http://www.mainstcapital.com

A telephonic replay of the conference call will be available through Friday, May 14, 2010 and may be accessed by dialing 303-590-3030 and using the passcode #4289345.  An audio archive will also be available on the investor relations section of the company's website at http://www.mainstcapital.com shortly after the call and will be accessible for approximately 90 days.  For more information, please contact Ben Burnham with DRG&E at 713-529-6600 or email at bburnham@drg-e.com.

ABOUT MAIN STREET CAPITAL CORPORATION

Main Street (www.mainstcapital.com) is a principal investment firm that provides long-term debt and equity capital to lower middle market companies.  Main Street's investments are made to support management buyouts, recapitalizations, growth financings and acquisitions of companies that operate in diverse industry sectors and generally have annual revenues ranging from $10 million to $100 million. Main Street seeks to partner with entrepreneurs, business owners and management teams and generally provides "one stop" financing alternatives to its portfolio companies.

Contacts:

Main Street Capital Corporation

Todd A. Reppert, President and CFO

treppert@mainstcapital.com

713-350-6000



Dennard Rupp Gray and Easterly, LLC

Ken Dennard / ksdennard@drg-e.com

Ben Burnham / bburnham@drg-e.com

713-529-6600

SOURCE Main Street Capital Corporation