Annual report [Section 13 and 15(d), not S-K Item 405]

FINANCIAL HIGHLIGHTS

v3.25.4
FINANCIAL HIGHLIGHTS
12 Months Ended
Dec. 31, 2025
Investment Company [Abstract]  
FINANCIAL HIGHLIGHTS FINANCIAL HIGHLIGHTS
The following is a schedule of financial highlights of Main Street for the years ended December 31, 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017 and 2016:
Year Ended December 31,
Per Share Data: 2025 2024 2023 2022 2021
NAV as of the beginning of the period $ 31.65  $ 29.20  $ 26.86  $ 25.29  $ 22.35 
Net investment income (1) 3.95  3.93  4.04  3.29  2.65 
Net realized gain (loss) (1)(2) 0.61  0.53  (1.47) (0.07) 0.66 
Net unrealized appreciation (depreciation) (1)(2) 1.10  1.59  2.84  0.33  1.97 
Income tax provision on net realized gain (loss) and net unrealized appreciation (depreciation) (1)(2) (0.14) (0.20) (0.18) (0.31) (0.48)
Net increase in net assets resulting from operations (1) 5.52  5.85  5.23  3.24  4.80 
Dividends paid from net investment income (4.23) (4.11) (3.70) (2.95) (2.58)
Dividends paid (4.23) (4.11) (3.70) (2.95) (2.58)
Impact of the net change in monthly dividends declared prior to the end of the period and paid in the subsequent period (0.01) (0.01) (0.01) (0.01) (0.01)
Accretive effect of stock offerings (issuing shares above NAV per share) 0.15  0.51  0.67  1.17  0.58 
Accretive effect of DRIP issuance (issuing shares above NAV per share) 0.19  0.15  0.10  0.09  0.09 
Other (3) 0.06  0.06  0.05  0.03  0.06 
NAV as of the end of the period $ 33.33  $ 31.65  $ 29.20  $ 26.86  $ 25.29 
Market value as of the end of the period $ 60.39  $ 58.58  $ 43.23  $ 36.95  $ 44.86 
Shares outstanding as of the end of the period 89,838,001  88,400,391  84,833,002  78,506,816  70,737,021 
Year Ended December 31,
Per Share Data: 2020 2019 2018 2017 2016
NAV as of the beginning of the period $ 23.91  $ 24.09  $ 23.53  $ 22.10  $ 21.24 
Net investment income (1) 2.10  2.50  2.60  2.39  2.23 
Net realized gain (loss) (1)(2) (1.77) (0.33) (0.03) 0.19  0.56 
Net unrealized appreciation (depreciation) (1)(2) (0.09) (0.09) 0.32  0.86  (0.14)
Income tax benefit (provision) on net realized gain (loss) and net unrealized appreciation (depreciation) (1)(2) 0.21  (0.02) (0.09) (0.43) 0.02 
Net increase in net assets resulting from operations (1) 0.45  2.06  2.80  3.01  2.67 
Dividends paid from net investment income (2.46) (2.91) (2.69) (2.47) (1.99)
Distributions from capital gains —  —  (0.16) (0.32) (0.74)
Dividends paid (2.46) (2.91) (2.85) (2.79) (2.73)
Impact of the net change in monthly dividends declared prior to the end of the period and paid in the subsequent period —  (0.01) (0.01) (0.01) (0.01)
Accretive effect of stock offerings (issuing shares above NAV per share) 0.41  0.55  0.47  1.07  0.76 
Accretive effect of DRIP issuance (issuing shares above NAV per share) 0.08  0.12  0.09  0.06  0.08 
Other (3) (0.04) 0.01  0.06  0.09  0.09 
NAV as of the end of the period $ 22.35  $ 23.91  $ 24.09  $ 23.53  $ 22.10 
Market value as of the end of the period $ 32.26  $ 43.11  $ 33.81  $ 39.73  $ 36.77 
Shares outstanding as of the end of the period 67,762,032  64,252,937  61,264,861  58,660,680  54,354,857 
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(1)Based on weighted-average number of common shares outstanding for the period.
(2)Net realized gains or losses, net unrealized appreciation or depreciation and the related income tax provision or benefit can fluctuate significantly from period to period.
(3)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.
Year Ended December 31,
2025 2024 2023 2022 2021
(dollars in thousands)
NAV as of the end of the period $ 2,993,893 $ 2,797,838 $ 2,477,399 $ 2,108,586 $ 1,788,846
Average NAV $ 2,890,131 $ 2,612,483 $ 2,276,932 $ 1,923,134 $ 1,626,585
Average outstanding debt $ 2,240,846 $ 2,128,092 $ 1,951,923 $ 1,882,462 $ 1,417,831
Ratios to average NAV:
Ratio of total expenses, including tax expenses, to average NAV (1) 7.84  % 8.29  % 8.08  % 8.05  % 8.56  %
Ratio of operating expenses to average NAV (2) 6.91  % 7.12  % 7.09  % 6.84  % 6.54  %
Ratio of operating expenses, excluding interest expense, to average NAV (2) 2.48  % 2.39  % 2.58  % 2.77  % 2.92  %
Ratio of net investment income to average NAV 12.20  % 13.07  % 14.53  % 12.76  % 11.23  %
Portfolio turnover ratio 19.76  % 22.33  % 19.24  % 16.79  % 29.81  %
Total investment return (3) 10.65  % 47.24  % 28.23  % (11.18) % 48.24  %
Total return based on change in NAV (4) 17.63  % 20.51  % 20.32  % 13.51  % 21.84  %
Year Ended December 31,
2020 2019 2018 2017 2016
(dollars in thousands)
NAV as of the end of the period $ 1,514,767 $ 1,536,390 $ 1,476,049 $ 1,380,368 $ 1,201,481
Average NAV $ 1,436,291 $ 1,517,615 $ 1,441,163 $ 1,287,639 $ 1,118,567
Average outstanding debt $ 1,152,108 $ 1,055,800 $ 947,694 $ 843,993 $ 801,048
Ratios to average NAV:
Ratio of total expenses, including tax expenses, to average NAV (1) 4.95  % 5.75  % 5.75  % 7.37  % 5.48  %
Ratio of operating expenses to average NAV (2) 5.89  % 5.67  % 5.32  % 5.47  % 5.59  %
Ratio of operating expenses, excluding interest expense, to average NAV (2) 2.44  % 2.36  % 2.30  % 2.63  % 2.58  %
Ratio of net investment income to average NAV 9.60  % 10.37  % 10.87  % 10.51  % 10.35  %
Portfolio turnover ratio 18.00  % 18.86  % 29.13  % 38.18  % 24.63  %
Total investment return (3) (19.11) % 36.86  % (8.25) % 16.02  % 37.36  %
Total return based on change in NAV (4) 1.91  % 8.78  % 12.19  % 14.20  % 12.97  %
___________________________
(1)Total expenses are the sum of operating expenses and all tax expenses.
(2)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 $23.5 million, $23.1 million, $22.1 million, $13.0 million, $10.3 million, $7.4 million, $6.7 million, $6.8 million, $6.4 million and $5.1 million for the years ended December 31, 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017 and 2016, respectively.
(3)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.
(4)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 plans and other miscellaneous items.