Main Street Capital Corporation to pay supplemental dividend in September

Board of Directors of Main Street Capital Corporation (NYSE:MAIN) declared a supplemental cash dividend of $0.30 per share payable in September 2026. 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 June 30, 2026.

Supplemental Cash Dividend Payable in September 2026
Declared	Ex-Dividend Date	Record Date	Payment Date	Amount Per Share
8/3/2026	9/21/2026	9/21/2026	9/28/2026	$0.30

Main Street Capital Corporation to pay supplemental dividend in June

In addition to the regular monthly dividends for the third quarter of 2026, the Board of Directors declared a supplemental cash dividend of $0.30 per share payable in June 2026. 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, 2026.

Supplemental Cash Dividend Payable in June 2026
Declared	Ex-Dividend Date	Record Date	Payment Date	Amount Per Share
5/4/2026	6/22/2026	6/22/2026	6/29/2026	$0.30

Dividend increase #24 of 2026 : 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 $0.265 per share for each of July, August and September 2026. These monthly dividends, which will be payable pursuant to the table below, total $0.795 per share for the third quarter of 2026 and represent a 1.9% increase from the regular monthly dividends declared for the second quarter of 2026 and a 3.9% increase from the regular monthly dividends paid in the third quarter of 2025. 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 2026 Regular Monthly Dividends
Declared	Ex-Dividend Date	Record Date	Payment Date	Amount Per Share
5/4/2026	7/8/2026	7/8/2026	7/15/2026	$0.265
5/4/2026	8/7/2026	8/7/2026	8/14/2026	$0.265
5/4/2026	9/8/2026	9/8/2026	9/15/2026	$0.265
		Total for Third Quarter 2026:		$0.795

Main Street Capital Corporation to pay supplemental dividend in March

Main Street Capital Corporation (NYSE: MAIN) ("Main Street") is pleased to announce that its Board of Directors declared regular monthly cash dividends of $0.26 per share for each of April, May and June 2026. These monthly dividends, which will be payable pursuant to the table below, total $0.78 per share for the second quarter of 2026-

Summary of Second Quarter 2026 Regular Monthly Dividends

Declared	Ex-Dividend Date	Record Date	Payment Date	Amount Per Share
2/23/2026	4/8/2026	4/8/2026	4/15/2026	$0.26
2/23/2026	5/8/2026	5/8/2026	5/15/2026	$0.26
2/23/2026	6/8/2026	6/8/2026	6/15/2026	$0.26
		Total for Second Quarter 2026:		$0.78

In addition to the regular monthly dividends for the second quarter of 2026, the Board of Directors declared a supplemental cash dividend of $0.30 per share payable in March 2026. 

Supplemental Cash Dividend Payable in March 2026

Declared	Ex-Dividend Date	Record Date	Payment Date	Amount Per Share
2/23/2026	3/20/2026	3/20/2026	3/27/2026	$0.30

Main Street Capital Corporation to pay supplemental dividend in December

Board of Directors of Main Street Capital Corporation (NYSE:MAIN) declared a supplemental cash dividend of $0.30 per share payable in December 2025. 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 September 30, 2025.

Supplemental Cash Dividend Payable in December 2025
Declared	Ex-Dividend Date	Record Date	Payment Date	Amount Per Share
11/3/2025	12/22/2025	12/22/2025	12/29/2025	$0.30

Dividend increase #42 of 2025 : 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 $0.26 per share for each of January, February and March 2026. These monthly dividends, which will be payable pursuant to the table below, total $0.78 per share for the first quarter of 2026 and represent a 2.0% increase from the regular monthly dividends declared for the fourth quarter of 2025 and a 4.0% increase from the regular monthly dividends paid in the first quarter of 2025. 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 First Quarter 2026 Regular Monthly Dividends
Declared	Ex-Dividend Date	Record Date	Payment Date	Amount Per Share
11/3/2025	1/8/2026	1/8/2026	1/15/2026	$0.26
11/3/2025	2/6/2026	2/6/2026	2/13/2026	$0.26
11/3/2025	3/6/2026	3/6/2026	3/13/2026	$0.26
		Total for First Quarter 2026:		$0.78

Main Street Capital to pay supplemental dividend in September

Board of Directors declared a supplemental cash dividend of $0.30 per share payable in September 2025. 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 June 30, 2025.

Supplemental Cash Dividend Payable in September 2025
Declared	Ex-Dividend Date	Record Date	Payment Date	Amount Per Share
8/4/2025	9/19/2025	9/19/2025	9/26/2025	$0.30

Main Street Capital Corp. to pay supplemental dividend in June

Board of Directors of Main Street Capital Corporation (NYSE:MAIN) declared a supplemental cash dividend of $0.30 per share payable in June 2025. 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, 2025.

Supplemental Cash Dividend Payable in June 2025

Declared	Ex-Dividend Date	Record Date	Payment Date	Amount Per Share
5/5/2025	6/20/2025	6/20/2025	6/27/2025	$0.30

Dividend increase #23 of 2025 : Main Street Capital Corporation

Main Street Capital Corporation (NYSE: MAIN)  is pleased to announce that its Board of Directors declared regular monthly cash dividends of $0.255 per share for each of July, August and September 2025. These monthly dividends, which will be payable pursuant to the table below, total $0.765 per share for the third quarter of 2025 and represent a 2.0% increase from the regular monthly dividends declared for the second quarter of 2025 and a 4.1% increase from the regular monthly dividends paid in the third quarter of 2024. 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 2025 Regular Monthly Dividends

Declared	Ex-Dividend Date	Record Date	Payment Date	Amount Per Share
5/5/2025	7/8/2025	7/8/2025	7/15/2025	$0.255
5/5/2025	8/8/2025	8/8/2025	8/15/2025	$0.255
5/5/2025	9/8/2025	9/8/2025	9/15/2025	$0.255
		Total for Third Quarter 2025:		$0.765