Dividend increase #19 of 2023 : Main Street Capital Corporation

Main Street Capital Corporation (NYSE: MAIN) ("Main Street") is pleased to announce that its Board of Directors declared regular monthly cash dividends of $0.23 per share for each of July, August and September 2023.  These monthly dividends, which will be payable pursuant to the table below, total $0.69 per share for the third quarter of 2023 and represent a 2.2% increase from the regular monthly dividends declared for the second quarter of 2023 and a 7.0% increase from the regular monthly dividends paid in the third quarter of 2022. Since its October 2007 initial public offering, Main Street has periodically increased the amount of its regular monthly dividends paid per share and has never reduced its regular monthly dividend amount per share.

Summary of Third Quarter 2023 Regular Monthly Dividends

Declared	Ex-Dividend Date	Record Date	Payment Date	Amount Per Share
5/1/2023 5/1/2023 5/1/2023	7/6/2023 8/7/2023 9/7/2023	7/7/2023 8/8/2023 9/8/2023	7/14/2023 8/15/2023 9/15/2023	$0.23 $0.23 $0.23
		Total for Third Quarter 2023:		$0.69

In addition to the regular monthly dividends for the third quarter of 2023, the Board of Directors declared a supplemental cash dividend of $0.225 per share payable in June 2023. 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 March 31, 2023.

Supplemental Cash Dividend Payable in June 2023

Declared	Ex-Dividend Date	Record Date	Payment Date	Amount Per Share
5/1/2023	6/20/2023	6/21/2023	6/28/2023	$0.225