Quarterly report [Sections 13 or 15(d)]

Consolidated Balance Sheets (Parenthetical)

v3.26.1
Consolidated Balance Sheets (Parenthetical) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Investment, cost $ 4,933,484,000 [1],[2],[3] $ 4,724,528,000 [4],[5],[6]
Deferred financing costs, accumulated amortization $ 18,351,000 $ 17,601,000
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 150,000,000 150,000,000
Common stock, shares issued (in shares) 92,454,655 89,834,849
Common stock, shares outstanding (in shares) 92,454,655 89,834,849
March 2029 Notes | Unsecured Notes    
Debt instrument, par value $ 550,000,000 $ 350,000,000
July 2026 Notes | Unsecured Notes    
Debt instrument, par value 500,000,000 500,000,000
June 2027 Notes | Unsecured Notes    
Debt instrument, par value 400,000,000.0 400,000,000
August 2028 Notes | Unsecured Notes    
Debt instrument, par value 350,000,000 350,000,000
SBIC debentures | Unsecured Notes    
Debt instrument, par value 350,000,000 350,000,000
Control investments    
Investment, cost 1,884,724,000 [3],[7] 1,824,132,000 [6],[8]
Affiliate investments    
Investment, cost 966,939,000 [3],[9] 881,641,000 [6]
Non‑Control/Non‑Affiliate investments    
Investment, cost $ 2,081,821,000 [3],[10] $ 2,018,755,000 [6],[11]
[1] All portfolio company headquarters are based in the U.S., unless otherwise noted.
[2] All investments are LMM (as defined below) portfolio investments, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of LMM portfolio investments. All of the Company’s investments, unless otherwise noted, are encumbered either as security for
the Corporate Facility or SPV Facility (each as defined below) or in support of the debentures guaranteed by the SBA (as defined below) and issued by the Funds (as defined below).
[3] Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.
[4] All portfolio company headquarters are based in the U.S., unless otherwise noted.
[5] All investments are LMM portfolio investments, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of LMM portfolio investments. All of the Company’s investments, unless otherwise noted, are encumbered either as security for the Corporate Facility or SPV Facility or in support of the debentures guaranteed by the SBA and issued by the Funds.
[6] Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.
[7] “Control” investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained.
[8] “Control” investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained.
[9] “Affiliate” investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments.
[10] “Non-Control/Non-Affiliate” investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.
[11] “Non-Control/Non-Affiliate” investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.