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SUMMARY OF PER SHARE INFORMATION | 12 Months Ended
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Mar. 31, 2025
Investment Company [Abstract] |
SUMMARY OF PER SHARE INFORMATION | SUMMARY OF PER SHARE INFORMATION The following presents a summary of per share data for the years ended March 31, 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018 and 2017 (share amounts presented in thousands).
| Years Ended
| March 31,
Per Share Data: | 2025 |  | 2024 |  | 2023 |  | 2022 |  | 2021 |  | 2020 |  | 2019 |  | 2018 |  | 2017
Investment income 1 | $ | 4.25 |  |  | $ | 4.37 |  |  | $ | 3.97 |  |  | $ | 3.60 |  |  | $ | 3.57 |  |  | $ | 3.45 |  |  | $ | 3.10 |  |  | $ | 2.18 |  |  | $ | 1.48 |
Operating expenses 1 | (1.74) |  |  | (1.65) |  |  | (1.67) |  |  | (1.70) |  |  | (1.78) |  |  | (1.76) |  |  | (1.62) |  |  | (1.16) |  |  | (0.87) |
Income taxes 1 | (0.05) |  |  | (0.02) |  |  | (0.01) |  |  | (0.03) |  |  | (0.13) |  |  | (0.12) |  |  | (0.06) |  |  | (0.01) |  |  | (0.11) |
Net investment income 1 | 2.46 |  |  | 2.70 |  |  | 2.29 |  |  | 1.87 |  |  | 1.66 |  |  | 1.57 |  |  | 1.42 |  |  | 1.01 |  |  | 0.50 |
Net realized (loss) gain, net of tax 1 | (1.03) |  |  | (0.98) |  |  | (0.57) |  |  | 0.26 |  |  | (0.45) |  |  | 2.35 |  |  | 1.24 |  |  | 0.10 |  |  | 0.50 |
Net unrealized appreciation (depreciation) on investments, net of tax 1 | 0.05 |  |  | 0.34 |  |  | (0.62) |  |  | 0.50 |  |  | 1.51 |  |  | (5.16) |  |  | (0.68) |  |  | 1.34 |  |  | 0.49 |
Realized loss on extinguishment of debt 1 | (0.01) |  |  | (0.01) |  |  | — |  |  | (0.75) |  |  | (0.05) |  |  | — |  |  | — |  |  | — |  |  | — |
Total increase (decrease) from investment operations | 1.47 |  |  | 2.05 |  |  | 1.10 |  |  | 1.88 |  |  | 2.67 |  |  | (1.24) |  |  | 1.98 |  |  | 2.45 |  |  | 1.49 |
Accretive effect of share issuances and repurchases | 0.94 |  |  | 0.86 |  |  | 0.50 |  |  | 1.45 |  |  | 0.30 |  |  | 0.45 |  |  | 0.06 |  |  | (0.04) |  |  | — |
Dividends to shareholders | (2.54) |  |  | (2.47) |  |  | (2.28) |  |  | (2.52) |  |  | (2.05) |  |  | (2.75) |  |  | (2.27) |  |  | (0.99) |  |  | (0.79) |
Spin-off Compensation Plan Distribution, net of tax | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (0.03) |  |  | (0.08) |
Issuance of restricted stock 1,2 | (0.10) |  |  | (0.13) |  |  | (0.14) |  |  | (0.10) |  |  | (0.16) |  |  | (0.06) |  |  | (0.23) |  |  | (0.18) |  |  | (0.15) |
Common stock withheld for payroll taxes upon vesting of restricted stock | (0.10) |  |  | (0.05) |  |  | (0.01) |  |  | (0.03) |  |  | — |  |  | — |  |  | (0.01) |  |  | (0.01) |  |  | — |
Exercise of employee stock options 3 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (0.12) |  |  | 0.01 |  |  | (0.09) |
Share based compensation expense | 0.13 |  |  | 0.10 |  |  | 0.10 |  |  | 0.14 |  |  | 0.14 |  |  | 0.16 |  |  | 0.13 |  |  | 0.11 |  |  | 0.08 |
Change in restoration plan | — |  |  | — |  |  | 0.06 |  |  | 0.01 |  |  | — |  |  | (0.01) |  |  | (0.01) |  |  | (0.05) |  |  | — |
Repurchase of common stock | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 0.15 |  |  | — |  |  | — |  |  | — |
Other 4 | 0.13 |  |  | 0.04 |  |  | 0.18 |  |  | 0.02 |  |  | (0.02) |  |  | (0.19) |  |  | 0.01 |  |  | 0.01 |  |  | — |
(Decrease) increase in net asset value | (0.07) |  |  | 0.40 |  |  | (0.49) |  |  | 0.85 |  |  | 0.88 |  |  | (3.49) |  |  | (0.46) |  |  | 1.28 |  |  | 0.46 |
Net asset value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning of period | 16.77 |  |  | 16.37 |  |  | 16.86 |  |  | 16.01 |  |  | 15.13 |  |  | 18.62 |  |  | 19.08 |  |  | 17.80 |  |  | 17.34 |
End of period | $ | 16.70 |  |  | $ | 16.77 |  |  | $ | 16.37 |  |  | $ | 16.86 |  |  | $ | 16.01 |  |  | $ | 15.13 |  |  | $ | 18.62 |  |  | $ | 19.08 |  |  | $ | 17.80 |
Ratios and Supplemental Data |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ratio of operating expenses to average net assets | 10.32 | % |  | 9.82 | % |  | 10.06 | % |  | 10.31 | % |  | 11.51 | % |  | 9.87 | % |  | 8.61 | % |  | 6.35 | % |  | 4.95 | %
Ratio of operating expenses (excluding interest expense) to average net assets | 3.57 | % |  | 3.52 | % |  | 4.28 | % |  | 5.03 | % |  | 5.43 | % |  | 4.94 | % |  | 4.75 | % |  | 4.72 | % |  | 4.60 | %
Ratio of net investment income to average net assets | 14.52 | % |  | 16.07 | % |  | 13.75 | % |  | 11.31 | % |  | 10.74 | % |  | 8.77 | % |  | 7.53 | % |  | 5.51 | % |  | 2.83 | %
Portfolio turnover | 18.84 | % |  | 15.65 | % |  | 13.68 | % |  | 33.91 | % |  | 18.81 | % |  | 22.76 | % |  | 23.38 | % |  | 25.42 | % |  | 23.57 | %
Total investment return 5 | (1.01) | % |  | 55.66 | % |  | (15.36) | % |  | 18.10 | % |  | 118.56 | % |  | (37.52) | % |  | 38.34 | % |  | 6.61 | % |  | 27.88 | %
Total return based on change in NAV 6 | 14.73 | % |  | 17.53 | % |  | 10.62 | % |  | 21.05 | % |  | 19.37 | % |  | (3.97) | % |  | 9.49 | % |  | 12.75 | % |  | 7.21 | %
Per share market value at the end of the period | $ | 22.32 |  |  | $ | 24.96 |  |  | $ | 17.78 |  |  | $ | 23.73 |  |  | $ | 22.16 |  |  | $ | 11.42 |  |  | $ | 21.04 |  |  | $ | 17.02 |  |  | $ | 16.91 |
Weighted-average basic common shares outstanding | 47,448 |  |  | 40,727 |  |  | 30,016 |  |  | 22,840 |  |  | 19,060 |  |  | 18,000 |  |  | 16,074 |  |  | 16,074 |  |  | 15,825 |
Weighted-average diluted common shares outstanding | 51,188 |  |  | 40,727 |  |  | 30,016 |  |  | 22,840 |  |  | 19,060 |  |  | 18,000 |  |  | 16,139 |  |  | 16,139 |  |  | 15,877 |
Common shares outstanding at end of period | 52,913 |  |  | 45,051 |  |  | 36,076 |  |  | 24,959 |  |  | 21,005 |  |  | 17,998 |  |  | 17,503 |  |  | 16,162 |  |  | 16,011 |
1 Based on weighted average of common shares outstanding for the period. 2 Reflects impact of the different share amounts as a result of issuance or forfeiture of restricted stock during the period. 3 Net decrease is due to the exercise of employee stock options at prices less than beginning of period net asset value. 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. The balance increases with the increase in variability of shares outstanding throughout the year due to share issuance and repurchase activity. 5 Total investment return based on 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 CSWC’s dividend reinvestment plan during the period. The return does not reflect any sales load that may be paid by an investor. 6 Total return based on change in NAV was calculated using the sum of ending NAV plus dividends to shareholders and other non-operating changes during the period, as divided by the beginning NAV, and has not been annualized.

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