Main Street Capital Declares Quarterly Dividend of $0.34 Per Share

HOUSTON, Feb. 7 /PRNewswire-FirstCall/ -- Main Street Capital Corporation (Nasdaq: MAIN) ("Main Street") announced today that its Board of Directors declared a quarterly dividend of $0.34 per share. This quarterly dividend represents a 3.0% sequential increase from Main Street's initial quarterly dividend declared in November 2007 and represents a 10.1% annualized yield based upon the current share price of Main Street's common stock.

This quarterly dividend will be paid based upon the accumulated taxable income recognized by Main Street, including excess undistributed taxable income from 2007 that was carried forward for distribution during 2008. For tax purposes, it is estimated that approximately 80% of the current quarterly dividend will be designated as ordinary taxable income, with the remainder designated as long-term capital gain. The final determination of the tax attributes for this dividend will be made after the close of the 2008 tax year and may differ from the estimates above.

The current quarterly dividend will be payable on March 21, 2008 to shareholders of record on February 15, 2008.

Main Street maintains a dividend reinvestment plan ("DRIP") that provides for the reinvestment of dividends on behalf of its stockholders, unless a stockholder has elected to receive dividends in cash. As a result, if Main Street declares a cash dividend, our stockholders who have not "opted out" of the DRIP by the dividend record date will have their cash dividend automatically reinvested into additional shares of our common stock. Main Street has the option to satisfy the share requirements of the DRIP through the issuance of new shares of common stock or through open market purchases of common stock by the DRIP plan administrator. Newly-issued shares will be valued based upon the final closing price of Main Street's common stock on the last trading day prior to the dividend payment date. Shares purchased in the open market to satisfy the DRIP requirements will be valued based upon the average price of the applicable shares purchased by the DRIP plan administrator, before any associated brokerage or other costs.

ABOUT MAIN STREET CAPITAL CORPORATION

Main Street (http://www.mainstreethouston.com) is a principal investment firm that provides long-term debt and equity capital to lower middle market companies. Main Street's investments are generally 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 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.

FORWARD-LOOKING STATEMENTS

This press release may contain certain forward-looking statements. Any such statements, other than statements of historical fact, are likely to be affected by other unknowable future events and conditions, including elements of the future that are or are not under Main Street's control, and that Main Street may or may not have considered; accordingly, such statements cannot be guarantees or assurances of any aspect of future performance. Actual developments and results are highly likely to vary materially from these estimates and projections of the future. Such statements speak only as of the time when made, and Main Street undertakes no obligation to update any such statement now or in the future.

    Contacts:
    Main Street Capital Corporation
    Todd A. Reppert, President and CFO
    treppert@mainstreethouston.com
    713-350-6000

    Dennard Rupp Gray and Easterly, LLC
    Ken Dennard
    ksdennard@drg-e.com / 713-529-6600
    Augustine Okwu
    gokwu@drg-e.com / 404-532-0086

SOURCE Main Street Capital Corporation

Released February 7, 2008