Press Releases

Main Street Capital Announces Third Quarter 2007 Financial Results

HOUSTON, Nov. 12, 2007 (PRIME NEWSWIRE) -- Main Street Capital Corporation (Nasdaq:MAIN) ("Main Street") announced today its financial results for the third quarter of 2007 and the nine months ended September 30, 2007. The reported financial results for the third quarter of 2007 and the nine months ended September 30, 2007, and corresponding 2006 periods, reflect the combined results of Main Street Mezzanine Fund, LP and its general partner (together, the "Existing Portfolio") prior to the consummation of Main Street's initial public offering and related formation transactions in October of 2007.

Third Quarter 2007 Financial Highlights for the Existing Portfolio


 * Total investment income of $3.1 million - 27.6% increase over
   prior year
 * Net investment income of $1.7 million - 41.9% increase over prior
   year
 * Net realized income of $3.9 million - 19.4% increase over prior
   year
 * Net Asset Value of $42.7 million at September 30, 2007 - $0.9
   million increase over prior quarter end
 * Net increase in members' equity and partners' capital of $2.7
   million - 59.8% decrease over prior year
 * Originated $9.0 million of new investments
 * Realized gains of $2.2 million from two investments

Third Quarter 2007 Results for the Existing Portfolio

Total investment income increased 27.6% to $3.1 million in the third quarter of 2007 compared to $2.5 million in the corresponding period of 2006. This comparable period increase was principally attributable to greater interest income on higher levels of average debt investments and greater cash dividend income from equity investments. Total investment income did not materially change on a sequential basis compared with the second quarter of 2007.

Net investment income increased 41.9% to $1.7 million in the third quarter of 2007 compared to $1.2 million in the corresponding period of 2006. This comparable period increase was attributable to higher levels of total investment income, partially offset by greater interest expense due to higher average outstanding SBIC debentures. Net investment income also sequentially increased 79.8% compared with the second quarter of 2007. Net investment income in the second quarter of 2007 was decreased by $0.7 million in professional costs related to the initial public offering.

Net realized income increased 19.4% to $3.9 million in the third quarter of 2007 compared to $3.3 million in the corresponding period of 2006. This comparable period increase was attributable to higher levels of net investment income and greater net realized gains from investments. Net realized income also sequentially increased 373.9% compared with the second quarter of 2007. Net realized income for the second quarter of 2007 was decreased by $0.7 million in professional costs related to the initial public offering.

Net increase in members' equity and partners' capital decreased 59.8% to $2.7 million in the third quarter of 2007 compared to $6.7 million in the same period of 2006. The lower net increase in members' equity and partners' capital was attributable to a decreased level of net change in unrealized appreciation for the third quarter of 2007. The net change in unrealized appreciation for the third quarter of 2007 was principally impacted by the accounting reversal of approximately $1.0 million in previously unrealized appreciation into realized gains. The net change in unrealized appreciation during the third quarter of 2007 also included unrealized appreciation on nine Existing Portfolio investments offset by unrealized depreciation on four Existing Portfolio investments. The net increase in members' equity and partners' capital also sequentially increased 103.5% compared with the second quarter of 2007.

Liquidity and Capital Resources

Based on the net cash proceeds from its initial public offering and available cash from the Existing Portfolio, Main Street currently estimates that it will be able to fund its investment activities for the next 12 months without requiring new debt or equity capital. However, this estimate will be impacted by, among other things, the pace of investment originations and investment redemptions, the level of cash from operations and amount of cash flow from realized gains, and the level of dividends paid net of dividend reinvestment plan participation.

As of September 30, 2007, the Existing Portfolio had $55.0 million of SBIC debenture leverage outstanding. The SBIC debenture leverage bears an annual weighted average interest rate of 5.8%, payable semiannually, and matures ten years from original issuance. Main Street will also seek to borrow additional non-SBIC debt as reasonable and necessary to supplement the funding of its investment activities.

Key Portfolio Statistics (all as of September 30, 2007)

The Existing Portfolio had debt and equity investments in 27 portfolio companies with the average portfolio investment equaling less than 4% of the total portfolio at cost.

Approximately 89% of the Existing Portfolio's total investments at cost were in the form of secured debt investments, and approximately 93% of those secured debt investments were secured by first priority liens on the assets of portfolio companies. The annual weighted average effective yield on the Existing Portfolio debt investments held at September 30, 2007 was 14.7%, including amortization of deferred debt origination fees and original issue discounts. Approximately 93% of the Existing Portfolio's debt investments were structured at fixed rates of interest with cash interest payments generally due monthly.

Based upon the information provided by our portfolio companies, which we have not independently verified, our portfolio companies had a weighted average net debt (interest-bearing debt less cash and cash equivalents) to EBITDA (Earnings Before Interest, Taxes, Depreciation and Amortization) ratio of approximately 3.2 to 1.0 and a total EBITDA to interest expense ratio of approximately 2.2 to 1.0. (1) Excluding all debt that was junior to the Existing Portfolio's debt position, these ratios were approximately 2.6 to 1.0 and approximately 2.5 to 1.0, respectively. (1)

The Existing Portfolio had equity ownership in approximately 85% of its portfolio companies and the average fully diluted equity ownership in these portfolio companies was approximately 22%.

Based upon Main Street's internal investment rating system, with a rating of "1" being the highest and a rating of "5" being the lowest, the weighted average investment rating for the Existing Portfolio was 2.2 compared to 2.1 at June 30, 2007.

Portfolio Activity in the Third Quarter of 2007

New Investment Originations:


 * Main Street provided "one-stop" financing to Universal Scaffolding
   & Equipment, LLC ("Universal") in the form of approximately $4.3
   million in secured debt and a $1.0 million equity investment,
   representing an approximate 19% fully diluted equity interest.
   Universal is in the business of manufacturing, sourcing and selling
   scaffolding, forming and shoring products, and custom fabricated
   cast iron products principally for the industrial and commercial
   construction and maintenance markets.
 * Main Street provided "one-stop" financing to Gulf Manufacturing,
   LLC ("Gulf") in the form of approximately $3.2 million in secured
   debt and a $0.5 million equity investment, which, with nominally-
   priced equity warrants received with the debt investment,
   represents an approximate 27% fully diluted equity interest.  Gulf
   is a manufacturer and distributor of machined parts for industrial
   piping systems and energy sector applications.

Key Realized Gains:


 * In connection with a $20 million equity capital funding
   transaction, Turbine Air Systems, Ltd. ("TAS") purchased the
   Existing Portfolio's equity warrant position in TAS for
   approximately $1.1 million in cash resulting in a realized gain of
   approximately $1.0 million.
 * In connection with a recapitalization financing transaction,
   Technical Innovations, LLC redeemed the Existing Portfolio's equity
   and equity warrant interests for approximately $1.6 million in cash
   resulting in a total realized gain of approximately $1.2 million.

Portfolio Activity Subsequent to the Third Quarter of 2007

New Investment Originations:


 * In November 2007, Main Street provided "one-stop" financing to
   Hydratec Holdings, LLC ("Hydratec") in the form of approximately
   $7.5 million in secured debt and a $1.8 million equity investment,
   representing a 60% fully diluted equity interest.  Hydratec is
   engaged in the design, sale and installation of agricultural
   irrigation products and systems throughout California.

Key Realized Gains:


 * In connection with the previously announced sale in October 2007 of
   All Hose & Specialty, LLC, Main Street recognized a total realized
   gain of approximately $2.3 million including structuring fees.

Initial Quarterly Dividend of $0.33 Per Share

On November 5, 2007, Main Street declared its initial quarterly dividend of $0.33 per share, or the equivalent of an 8.8% annual yield based upon its $15.00 per share initial public offering price. This initial quarterly dividend is payable on November 30, 2007 to shareholders of record on November 16, 2007. The initial quarterly dividend is being paid based upon the accumulated taxable income recognized by Main Street, including the long-term capital gain realized from the previously announced sale of portfolio company, All Hose & Specialty, LLC. Main Street estimates that approximately 67% of this initial quarterly dividend will be designated as long-term capital gain with the remainder representing ordinary taxable income.

Main Street estimates that its 2007 taxable income will exceed the initial quarterly dividend declared on November 5, 2007. Main Street intends to carry over (or "spill over") any undistributed excess 2007 taxable income for distribution to its shareholders in 2008 as permitted by the applicable Regulated Investment Company tax provisions. Any undistributed excess 2007 taxable income will be subject to a 4% excise tax. The final determination of the tax attributes for the initial dividend and the final amount of any undistributed excess 2007 taxable income will be made after the close of the 2007 tax year and may differ from the estimates above.

Third Quarter 2007 Financial Results Conference Call / Webcast

Main Street has scheduled a conference call for Tuesday, November 13, 2007 at 10:00 a.m. Eastern Time to discuss the Existing Portfolio's third quarter 2007 financial results.

You can access the conference call by dialing (303) 262-2140 or (800) 218-4007 and asking for the Main Street Capital conference call at least 10 minutes prior to the start time. You can also access the conference call via a live webcast by logging into the investor relations section of the Main Street website at www.mainstreethouston.com.

A telephonic replay of the conference call will be available through November 20, 2007 and may be accessed by dialing (303) 590-3000 and using the passcode 11100148#. An audio archive will also be available on the investor relations section of the Main Street website at www.mainstreethouston.com shortly after the call and will be accessible for approximately 90 days.

For a more detailed discussion of the financial and other information included in this press release, please also refer to the Main Street Form 10-Q to be filed shortly with the Securities and Exchange Commission (www.sec.gov).

(1) For purposes of calculating these ratios, one portfolio company with significant cash in excess of its outstanding debt and one portfolio company with a net debt to EBITDA ratio that exceeds 15.0 to 1.0 have both been excluded.

ABOUT MAIN STREET CAPITAL CORPORATION

Main Street (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.

The Main Street Capital Corporation logo is available at http://www.primenewswire.com/newsroom/prs/?pkgid=4309

FORWARD-LOOKING STATEMENTS

Main Street cautions that statements in this press release that are forward-looking and provide other than historical information involve risks and uncertainties that may impact our future results of operations. The forward-looking statements in this press release are based on current conditions and include statements regarding our goals, beliefs, strategies and future operating results and cash flows, including but not limited to the equivalent annual yield represented by our initial quarterly dividend; our estimates of allocation of our initial quarterly dividend between long-term capital gain and ordinary taxable income; our estimate that 2007 taxable income will exceed our initial quarterly dividend; our intention to carry over any excess 2007 taxable income for distribution to shareholders in 2008; and our estimate regarding the ability to fund investment activities for the next 12 months. Although our management believes that the expectations reflected in those forward-looking statements are reasonable, we can give no assurance that those expectations will prove to have been correct. Those statements are made based on various underlying assumptions and are subject to numerous uncertainties and risks, including, without limitation: our continued effectiveness in raising, deploying and managing capital; adverse changes in the economy generally or in the industries in which our portfolio companies operate; changes in laws and regulations that may adversely impact our operations or the operations of one or more of our portfolio companies; the operating and financial performance of our portfolio companies; retention of key investment personnel; competitive factors; and such other factors described under the captions "Special Note Regarding Forward-Looking Statements" and "Risk Factors" included in our filings with the Securities and Exchange Commission. We undertake no obligation to update the information contained herein to reflect subsequently occurring events or circumstances, except as required by applicable securities laws and regulations.


                           Main Street Mezzanine Fund, LP
                               Combined Balance Sheets

                                            September 30, December 31,
                                                2007          2006
                                            ------------  ------------
 ASSETS                                      (Unaudited)

 Investments at fair value:
  Control investments (cost: $35,430,945
   and $33,312,337 as of September 30, 2007
   and December 31, 2006, respectively)     $ 41,491,608  $ 42,429,000
  Affiliate investments (cost: $36,658,701
   and $24,328,596 as of September 30, 2007
   and December 31, 2006, respectively)       43,014,921    28,822,245
  Non-Control/Non-Affiliate investments
   (cost: $3,427,940 and $4,983,015 as of
   September 30, 2007 and December 31,
   2006, respectively)                         3,787,940     4,958,183
                                            ------------  ------------
    Total investments (cost: $75,517,586
     and $62,623,948 as of September 30,
     2007 and December 31, 2006,
     respectively)                            88,294,469    76,209,428

 Accumulated unearned income                  (2,613,344)   (2,498,427)
                                            ------------  ------------
 Total investments net of accumulated
  unearned income                             85,681,125    73,711,001
 Cash and cash equivalents                     9,564,003    13,768,719
 Deferred costs related to initial public
  offering                                     1,399,206            --
 Interest receivable                             596,538       527,597
 Other assets                                    109,396       102,461
 Deferred financing costs (net of
  accumulated amortization of $482,013 and
  $343,846 as of September 30, 2007 and
  December 31, 2006, respectively)             1,435,562     1,333,654
                                            ------------  ------------

    Total assets                            $ 98,785,830  $ 89,443,432
                                            ============  ============

 LIABILITIES, MEMBERS' EQUITY AND PARTNERS'
  CAPITAL

 SBIC debentures                            $ 55,000,000  $ 45,100,000
 Interest payable                                261,313       854,941
 Accounts payable related to initial public
  offering costs                                 619,431            --
 Other liabilities                               246,895       215,960
                                            ------------  ------------

    Total  liabilities                        56,127,639    46,170,901
 Members' equity (General Partner)             3,709,906     3,849,796
 Limited Partners' capital                    38,948,285    39,422,735
                                            ------------  ------------

    Total members' equity and partners'
     capital                                  42,658,191    43,272,531
                                            ------------  ------------

    Total liabilities, members' equity and
     partners' capital                      $ 98,785,830  $ 89,443,432
                                            ============  ============

                      Main Street Mezzanine Fund, LP
                      Combined Statement of Operations
                                (Unaudited)

                      For the Three Months      For the Nine Months
                       Ended September 30,      Ended September 30,
                    ------------------------  ------------------------
                        2007         2006       2007 (a)      2006
                    -----------  -----------  -----------  -----------

 INVESTMENT INCOME:
  Interest, fee and
   dividend income:
   Control
    investments     $ 1,454,790  $ 1,192,052  $ 3,709,221  $ 3,615,494
   Affiliate
    investments       1,362,521      860,692    3,871,178    2,271,673
   Non-Control/Non-
    Affiliate
    investments         151,114      202,426      568,527      941,657
                    -----------  -----------  -----------  -----------
  Total interest,
   fee and dividend
   income             2,968,425    2,255,170    8,148,926    6,828,824
  Interest from idle
   funds and other      158,958      196,709      533,318      565,410
                    -----------  -----------  -----------  -----------

   Total
    investment
    income            3,127,383    2,451,879    8,682,244    7,394,234
                    -----------  -----------  -----------  -----------

 EXPENSES:
  Management fees to
   affiliate            499,979      486,546    1,499,937    1,454,053
  Interest              849,299      684,172    2,396,541    2,033,063
  General and
   administrative        32,961       51,008      204,296      155,655
  Professional costs
   related to initial
   public offering           --           --      695,250           --
                    -----------  -----------  -----------  -----------

   Total expenses     1,382,239    1,221,726    4,796,024    3,642,771
                    -----------  -----------  -----------  -----------

 NET INVESTMENT
  INCOME              1,745,144    1,230,153    3,886,220    3,751,463
                    -----------  -----------  -----------  -----------

 NET REALIZED GAIN
  (LOSS) FROM
  INVESTMENTS:
  Control
   investments        1,191,463       87,816    1,802,713      263,449
  Affiliate
   investments          953,334    1,940,794    1,209,513    1,940,794
  Non-Control/Non-
   Affiliate
   investments               --           --     (270,538)       5,478
                    -----------  -----------  -----------  -----------
   Total net realized
    gain (loss) from
    investments       2,144,797    2,028,610    2,741,688    2,209,721
                    -----------  -----------  -----------  -----------

 NET REALIZED
  INCOME              3,889,941    3,258,763    6,627,908    5,961,184
                    -----------  -----------  -----------  -----------

 NET CHANGE IN
  UNREALIZED
  APPRECIATION
  (DEPRECIATION)
  FROM INVESTMENTS:
  Control
   investments       (1,366,000)   2,904,700   (2,007,250)   6,743,602
  Affiliate
   investments          150,000      413,000      813,822      263,827
  Non-Control/Non-
   Affiliate
   investments           35,000      155,000      384,832      163,498
                    -----------  -----------  -----------  -----------
   Total net change
    in unrealized
    appreciation
    (depreciation)
    from
    investments      (1,181,000)   3,472,700     (808,596)   7,170,927
                    -----------  -----------  -----------  -----------

 NET INCREASE IN
  MEMBERS' EQUITY
  AND PARTNERS'
  CAPITAL
  RESULTING
  FROM OPERATIONS   $ 2,708,941  $ 6,731,463  $ 5,819,312  $13,132,111
                    ===========  ===========  ===========  ===========

 (a) The nine months ended September 30, 2007 operating results
     include professional costs related the initial public offering.
     These costs were 29.0% of operating expenses for that period.
CONTACT:  Main Street Capital Corporation
          Todd A. Reppert, President and CFO
          713-350-6000
          treppert@mainstreethouston.com

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