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Investment Calculator

I invested		Shares Dollars (USD)	on	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec	01020304050607080910111213141516171819202122232425262728293031	2010200920082007
Reinvest Dividends:

Calculate Current Value and Shares Since: October 5, 2007

Investment Date:	Original Shares:	Original Value:	Current Shares:	Current Value:	Percent Return:
Oct 5, 2007	1,000	$ 14,700.00	1,387	$ 22,617.43	53.86%

Adjustments

Date	Reason	Factor	Shares	Price	Value	%
Oct 5, 2007	Initial Investment		1,000	14.70	$ 14,700.00	0.00%
Nov 14, 2007	Dividend	0.330	1,023	14.33	$ 14,660.00	( 0.27)%
Feb 13, 2008	Dividend	0.340	1,049	13.63	$ 14,291.71	( 2.78)%
May 8, 2008	Dividend	0.350	1,079	12.13	$ 13,085.88	( 10.98)%
Aug 12, 2008	Dividend	0.360	1,109	12.96	$ 14,369.65	( 2.25)%
Sep 16, 2008	Dividend	0.125	1,119	13.49	$ 15,095.90	2.69%
Oct 15, 2008	Dividend	0.125	1,132	10.68	$ 12,091.27	( 17.75)%
Nov 17, 2008	Dividend	0.125	1,146	10.49	$ 12,017.68	( 18.25)%
Dec 17, 2008	Dividend	0.125	1,161	9.25	$ 10,740.30	( 26.94)%
Jan 20, 2009	Dividend	0.125	1,176	9.50	$ 11,175.71	( 23.97)%
Feb 18, 2009	Dividend	0.125	1,191	9.74	$ 11,605.10	( 21.05)%
Mar 18, 2009	Dividend	0.125	1,208	9.27	$ 11,194.03	( 23.85)%
Apr 17, 2009	Dividend	0.125	1,219	12.99	$ 15,837.08	7.74%
May 19, 2009	Dividend	0.125	1,231	12.79	$ 15,745.64	7.11%
Jun 17, 2009	Dividend	0.125	1,243	13.02	$ 16,182.68	10.09%
Jul 17, 2009	Dividend	0.125	1,254	14.15	$ 17,742.53	20.70%
Aug 18, 2009	Dividend	0.125	1,265	13.69	$ 17,322.48	17.84%
Sep 17, 2009	Dividend	0.125	1,277	13.61	$ 17,379.42	18.23%
Oct 19, 2009	Dividend	0.125	1,288	13.93	$ 17,947.67	22.09%
Nov 18, 2009	Dividend	0.125	1,300	14.14	$ 18,379.29	25.03%
Jan 4, 2010	Dividend	0.125	1,310	16.14	$ 21,141.38	43.82%
Jan 19, 2010	Dividend	0.125	1,321	14.79	$ 19,536.78	32.90%
Feb 18, 2010	Dividend	0.125	1,332	14.58	$ 19,424.50	32.14%
Mar 23, 2010	Dividend	0.125	1,343	15.25	$ 20,483.66	39.34%
Apr 19, 2010	Dividend	0.125	1,354	16.01	$ 21,672.38	47.43%
May 18, 2010	Dividend	0.125	1,365	15.25	$ 20,812.79	41.58%
Jun 17, 2010	Dividend	0.125	1,376	15.27	$ 21,010.69	42.93%
Jul 19, 2010	Dividend	0.125	1,387	15.96	$ 22,132.08	50.56%
Jul 29, 2010	Current Investment		1,387	16.31	$ 22,617.43	53.86%

ADDRESS:

Main Street Capital Corporation
1300 Post Oak Blvd.
Suite 800
Houston, TX 77056

PH. 713 - 350 - 6000
FX. 713 - 350 - 6042

EMAIL US

STOCK QUOTE:

INVESTOR QUESTIONS:

Todd A. Reppert
President and CFO
treppert@mainstcapital.com  

PH. 713 - 350 - 6000

Ken Dennard
Dennard Rupp Gray and Easterly
ksdennard@drg-e.com

PH. 713-529-6600

TRANSFER AGENT:

American Stock Transfer and Trust Company
6201 15th Ave.
Brooklyn, NY 11219

PH. 866 - 706 - 8371

FORWARD-LOOKING STATEMENTS

This website 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.