v3.25.2
Investments - Composition of investment portfolio at cost and fair value (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Investments    
Amortized Cost $ 2,649,172 [1],[2],[3],[4],[5] $ 2,502,807 [6],[7],[8],[9],[10]
Fair Value $ 2,653,666 [1],[2],[3],[5] $ 2,504,242 [6],[7],[10]
Percent of Total Portfolio at Fair Value 100.00% 100.00%
First Lien Loans    
Investments    
Amortized Cost $ 2,333,060 $ 2,207,578
Fair Value $ 2,335,714 $ 2,209,392
Percent of Total Portfolio at Fair Value 88.00% 88.20%
Second Lien Loans    
Investments    
Amortized Cost $ 155,331 $ 157,690
Fair Value $ 149,799 $ 151,362
Percent of Total Portfolio at Fair Value 5.70% 6.00%
Unsecured Notes    
Investments    
Amortized Cost $ 111,299 $ 90,353
Fair Value $ 112,475 $ 91,375
Percent of Total Portfolio at Fair Value 4.20% 3.70%
Preferred Equity    
Investments    
Amortized Cost $ 37,116 $ 34,833
Fair Value $ 38,583 $ 36,226
Percent of Total Portfolio at Fair Value 1.50% 1.50%
Common Equity and Warrants    
Investments    
Amortized Cost $ 12,366 $ 12,353
Fair Value $ 17,095 $ 15,887
Percent of Total Portfolio at Fair Value 0.60% 0.60%
[1] All investments were qualifying assets as defined under Section 55(a) of the Investment Company Act of 1940 except for ALP CFO LP 2024-1, Barings Middle Market CLO Ltd., Best Egg Asset Structured Pass Through Master Trust, Churchill Middle Market CLO Ltd., Claros Mortgage Trust, Inc., Exeter Short Term Funding LLC, Imagine Software Inc, Ivy Hill Asset Management, L.P., Ivy Hill Middle Market Credit XII Ltd, LD Holdings Grouup LLC., New Mountain Capital LLC, and Syntax Systems Limited.
[2] All of the Company’s investments are domiciled in the United States except for Barings Middle Market CLO Ltd., New Mountain Guardian, and Syntax Systems Limited, which are domiciled in the Cayman Islands, Bermuda, and Canada, respectively.
[3] As of June 30, 2025, all investments are pledged as collateral unless otherwise stated.
[4] Cost represents the original cost adjusted for amortization of discounts and premiums, as applicable, on debt investments using the effective interest method.
[5] Unless otherwise indicated, all securities are valued using significant unobservable inputs, which are categorized as Level 3 assets under the definition of ASC 820 fair value hierarchy.
[6] All investments were qualifying assets as defined under Section 55(a) of the Investment Company Act of 1940 except for Ardonagh Finco B.V., New Mountain Guardian, Syntax Systems Limited, Exeter Short Term Funding LLC, and ALP CFO 2024, L.P
[7] All of the Company's investments are domiciled in the United States except for Ardonagh Finco B.V., New Mountain Guardian, and Syntax Systems Limited, which are domiciled in the United Kingdom, Bermuda, and Canada, respectively.
[8] As of December 31, 2024, all investments are pledged as collateral unless otherwise stated.
[9] Cost represents the original cost adjusted for amortization of discounts and premiums, as applicable, on debt investments using the effective interest method.
[10] Unless otherwise indicated, all securities are valued using significant unobservable inputs, which are categorized as Level 3 assets under the definition of ASC 820 fair value hierarchy.