Summary of Second Quarter 2022 Regular Monthly Dividends
| Declared | Ex-Dividend | Record Date | Payment Date | Amount Per | 
| 2/23/2022 2/23/2022 2/23/2022 | 4/1/2022 5/2/2022 6/1/2022 | 4/4/2022 5/3/2022 6/2/2022 | 4/14/2022 5/13/2022 6/15/2022 | $0.215 $0.215 $0.215 | 
| Total for Second Quarter 2022: | $0.645 | |||
In addition to the regular monthly dividends for the second quarter 
of 2022, the Board of Directors declared a supplemental cash dividend of
 $0.075 per share payable in March 2022. This supplemental cash 
dividend, which will be payable as set forth in the table below, will be
 paid out of Main Street's undistributed taxable income (taxable income 
in excess of dividends paid) as of December 31, 2021. Including all 
dividends declared to date, including the second quarter 2022 regular 
monthly dividend and the first quarter 2022 supplemental dividend, Main 
Street will have paid $33.54 per share in cumulative cash dividends 
since its October 2007 initial public offering at $15.00 per share.  
Supplemental Cash Dividend Payable in March 2022
| Declared | Ex-Dividend Date | Record Date | Payment Date | Amount Per Share | 
| 2/23/2022 | 3/21/2022 | 3/22/2022 | 3/30/2022 | $0.075  | 
