v3.26.1
Investments - Schedule of Investments at Fair Value and Amortized Cost (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Amortized Cost $ 36,258,686 [1],[2],[3],[4] $ 35,983,158 [5],[6],[7],[8]
Investments at fair value 35,690,147 [1],[4] 35,918,948 [5],[8]
First-lien senior secured debt investments    
Schedule of Investments [Line Items]    
Amortized Cost 31,522,055 31,727,075
Investments at fair value 31,053,486 31,597,264
Second-lien senior secured debt investments    
Schedule of Investments [Line Items]    
Amortized Cost 1,487,237 1,554,896
Investments at fair value 1,320,759 1,500,498
Unsecured debt investments    
Schedule of Investments [Line Items]    
Amortized Cost 439,632 463,745
Investments at fair value 441,892 479,850
Specialty finance debt investments    
Schedule of Investments [Line Items]    
Amortized Cost 146,790 134,800
Investments at fair value 146,790 134,800
Preferred equity investments    
Schedule of Investments [Line Items]    
Amortized Cost 524,734 508,942
Investments at fair value 491,965 496,312
Common equity investments    
Schedule of Investments [Line Items]    
Amortized Cost 414,912 370,541
Investments at fair value 491,911 435,238
Specialty finance equity investments    
Schedule of Investments [Line Items]    
Amortized Cost 1,294,004 814,147
Investments at fair value 1,390,072 900,635
Joint ventures    
Schedule of Investments [Line Items]    
Amortized Cost 429,322 409,012
Investments at fair value $ 353,272 $ 374,351
[1] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 30 for additional information on our restricted securities.
[2] The amortized cost represents the original cost adjusted for the amortization and accretion of premiums and discounts, as applicable, on debt investments using the effective interest method.
[3] As of June 30, 2026, the net estimated unrealized loss on investments for U.S. federal income tax purposes was $466.7 million based on a tax cost basis of $36.16 billion. As of June 30, 2026, the estimated aggregate gross unrealized loss for U.S. federal income tax purposes was $812.3 million. As of June 30, 2026, the estimated aggregate gross unrealized gain for U.S. federal income tax purposes was $345.6 million.
[4] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Company’s Amended and Restated Senior Secured Revolving Credit Agreement (the “Revolving Credit Facility”), credit facilities to which certain of our subsidiaries are parties (the “SPV Asset Facilities”) and collateral loan obligation transactions (“CLOs”). See “Note 5 — Debt.”
[5] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 30 for additional information on our restricted securities.
[6] The amortized cost represents the original cost adjusted for the amortization and accretion of premiums and discounts, as applicable, on debt investments using the effective interest method.
[7] As of December 31, 2025, the net estimated unrealized loss on investments for U.S. federal income tax purposes was $9.4 million based on a tax cost basis of $35.9 billion. As of December 31, 2025, the estimated aggregate gross unrealized loss for U.S. federal income tax purposes was $358.1 million As of December 31, 2025, the estimated aggregate gross unrealized gain for U.S. federal income tax purposes was $348.7 million.
[8] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Revolving Credit Facility, SPV Asset Facilities and CLOs. See “Note 5 — Debt.”