
	Three Months Ended March 31,
Per Share Data:	2026		2025
NAV as of the beginning of the period	$	33.33	$	31.65
Net investment income (1)	0.93		0.97
Net realized gain (loss) (1)(2)	0.20		(0.33)
Net unrealized appreciation (depreciation) (1)(2)	(0.56)		0.71
Income tax provision on net realized gain (loss) and net unrealized appreciation (depreciation) (1)(2)	(0.03)		(0.04)
Net increase in net assets resulting from operations (1)	0.54		1.31
Dividends paid from net investment income	(1.08)		(1.05)

Dividends paid (3)	(1.08)		(1.05)

Accretive effect of stock offerings (issuing shares above NAV per share)	0.59		0.03
Accretive effect of DRIP issuance (issuing shares above NAV per share)	0.05		0.05
Other (4)	0.03		0.04
NAV as of the end of the period	$	33.46	$	32.03
Market value as of the end of the period	$	52.96	$	56.56
Shares outstanding as of the end of the period	92,462,273		88,659,597

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(3)MSCC’s taxable income for each period is an estimate and will not be finally determined until MSCC files its tax return for each year. As a result, the tax character of MSCC’s dividends and distributions for each period is also an estimate. Therefore, the final tax character of MSCC’s dividends and distributions may be different than this estimate.

(4)Includes the impact of the different share amounts as a result of calculating certain per share data based on the weighted-average basic shares outstanding during the period and certain per share data based on the shares outstanding as of a period end or transaction date.


	Three Months Ended March 31,
	2026			2025

	(dollars in thousands)
NAV as of the end of the period	$	3,093,644		$	2,840,133
Average NAV	$	3,043,769		$	2,818,986
Average outstanding debt	$	2,495,500		$	2,181,500

Ratios to average NAV:
Ratio of total expenses, including tax expenses, to average NAV (1)(2)	1.92		%	1.94		%
Ratio of operating expenses to average NAV (2)(3)	1.72		%	1.68		%
Ratio of operating expenses, excluding interest expense, to average NAV (2)(3)	0.60		%	0.57		%
Ratio of net investment income to average NAV (2)	2.78		%	3.05		%
Portfolio turnover ratio (2)	3.64		%	3.29		%
Total investment return (2)(4)	(10.64)		%	(1.69)		%
Total return based on change in NAV (2)(5)	1.64		%	4.15		%

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(3)Unless otherwise noted, operating expenses include interest, compensation, general and administrative and share-based compensation expenses, net of expenses allocated to the External Investment Manager of $5.5 million and $5.3 million for the three months ended March 31, 2026 and 2025, respectively.

(4)Total investment return is based on the purchase of stock at the current market price on the first day and a sale at the current market price on the last day of each period reported on the table and assumes reinvestment of dividends at prices obtained by Main Street’s DRIP (as defined below) during the period. The return does not reflect any sales load that may be paid by an investor.

(5)Total return based on change in NAV was calculated using the sum of ending NAV plus dividends to stockholders and other non-operating changes during the period, divided by the beginning NAV. Non-operating changes include any items that affect NAV other than the net increase in net assets resulting from operations, such as the effects of stock offerings, shares issued under the DRIP and equity incentive compensation plans and other miscellaneous items.