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CONSOLIDATED STATEMENTS OF ASSETS AND LIABILITIES (Parenthetical) - USD ($) $ in Thousands | Jun. 30, 2025 | Mar. 31, 2025
--- | --- | ---
Cost | $ 1,798,438 | [1],[2],[3],[4],[5] | $ 1,779,360 | [6],[7],[8],[9],[10],[11]
Accumulated amortization | 11,061 |  | 10,357 |
Unamortized debt issuance costs | $ 12,925 |  | $ 13,810 |
Common stock, par value (in usd per share) | $ 0.25 |  | $ 0.25 |
Common stock, authorized (in shares) | 75,000,000 |  | 75,000,000 |
Common stock, issued (in shares) | 55,227,370 |  | 52,912,796 |
Common stock, outstanding (in shares) | 55,227,370 |  | 52,912,796 |
SBA Debentures |  |  |  |
Unamortized debt issuance costs | $ 3,885 |  | $ 4,082 |
October 2026 Notes |  |  |  |
Unamortized debt issuance costs | 962 |  | 1,154 |
August 2028 Notes |  |  |  |
Unamortized debt issuance costs | 1,555 |  | 1,681 |
2029 Convertible Notes |  |  |  |
Unamortized debt issuance costs | 6,523 |  | 6,893 |
Non-control/Non-affiliate investments |  |  |  |
Cost | 1,438,979 |  | 1,403,623 |
Affiliate investments |  |  |  |
Cost | 287,517 |  | 304,824 |
Control investments |  |  |  |
Cost | $ 71,942 |  | $ 70,913 |
[1] | All debt investments are income-producing, unless otherwise noted. Equity investments are non-income producing, unless otherwise noted. All amounts are stated in U.S. Dollars.
[2] | Non-Control/Non-Affiliate investments are generally defined by the 1940 Act as investments that are neither control investments nor affiliate investments. Investments are classified as non-control/non-affiliate investments, unless otherwise noted. At June 30, 2025, the Company held $1,449.5 million of non-control/non-affiliate investments, which represented approximately 81.4% of the Company’s investment assets. The fair value of these investments as a percent of net assets is 158.1%.
[3] | As of June 30, 2025, the cumulative gross unrealized appreciation for U.S. federal income tax purposes was approximately $103.8 million; cumulative gross unrealized depreciation for federal income tax purposes was $119.7 million. Cumulative net unrealized depreciation was $15.9 million, based on a tax cost of $1,796.1 million.
[4] | Equity ownership may be held in shares or units of a company that is either wholly owned by the portfolio company or under common control by the same parent company to the portfolio company.
[5] | Unless otherwise noted, all portfolio company headquarters are based in the United States.
[6] | As of March 31, 2025, the cumulative gross unrealized appreciation for U.S. federal income tax purposes was approximately $117.4 million; cumulative gross unrealized depreciation for federal income tax purposes was $108.2 million. Cumulative net unrealized depreciation was $9.2 million, based on a tax cost of $1,776.1 million.
[7] | Equity ownership may be held in shares or units of a company that is either wholly owned by the portfolio company or under common control by the same parent company to the portfolio company.
[8] | Negative cost in this column represents the original issue discount of certain undrawn revolvers and delayed draw term loans.
[9] | Unless otherwise noted, all portfolio company headquarters are based in the United States.
[10] | All debt investments are income-producing, unless otherwise noted. Equity investments are non-income producing, unless otherwise noted. All amounts are stated in U.S. Dollars.
[11] | Non-Control/Non-Affiliate investments are generally defined by the 1940 Act as investments that are neither control investments nor affiliate investments. Investments are classified as non-control/non-affiliate investments, unless otherwise noted. At March 31, 2025, the Company held $1,436.3 million of non-control/non-affiliate investments, which represented approximately 80.5% of the Company’s investment assets. The fair value of these investments as a percent of net assets is 162.6%.

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