| Fair Value Measurements |
Fair Value Measurements The following tables present the fair value hierarchy of financial instruments: | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2026 | | Level 1 | | Level 2 | | Level 3 | | Total | | First lien debt | $ | — | | | $ | 77,889 | | | $ | 12,330,802 | | | $ | 12,408,691 | | | Second lien debt | — | | | — | | | 252,721 | | | 252,721 | | | Unsecured debt | — | | | — | | | 12,498 | | | 12,498 | | | Equity | — | | | — | | | 272,324 | | | 272,324 | | | Total | $ | — | | | $ | 77,889 | | | $ | 12,868,345 | | | $ | 12,946,234 | |
| | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | Level 1 | | Level 2 | | Level 3 | | Total | | First lien debt | $ | — | | | $ | 106,617 | | | $ | 13,759,817 | | | $ | 13,866,434 | | | Second lien debt | — | | | — | | | 231,650 | | | 231,650 | | | Unsecured debt | — | | | — | | | 12,278 | | | 12,278 | | | Equity | 438 | | | — | | | 96,494 | | | 96,932 | | | Total | $ | 438 | | | $ | 106,617 | | | $ | 14,100,239 | | | $ | 14,207,294 | |
Within Investments at fair value, substantially all Equity investments are illiquid and privately negotiated in nature and are subject to contractual sale constraints or other restrictions pursuant to their respective governing or similar agreements. As of September 30, 2026, $115.0 million of such Equity investments had a sale constraint or other restriction that lapses after a predetermined date; the weighted average remaining duration of such restrictions was 1.9 years. As of December 31, 2025, $5.8 million of such Equity investments had a sale constraint or other restriction that lapses after a predetermined date; the weighted average remaining duration of such restrictions was 4.2 years. The following tables present changes in the fair value of financial instruments for which Level 3 inputs were used to determine the fair value: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, 2026 | | First Lien Debt | | Second Lien Debt | | Unsecured Debt | | Equity | | Total | | Fair value, beginning of period | $ | 12,863,118 | | | $ | 250,182 | | | $ | 12,348 | | | $ | 157,187 | | | $ | 13,282,835 | | | Purchases of investments | 255,650 | | | 3,368 | | | 537 | | | 122,129 | | | 381,684 | | | Proceeds from principal repayments and sales of investments | (754,802) | | | (779) | | | (11) | | | (7,211) | | | (762,803) | | | Accretion of discount (amortization of premium) | 11,846 | | | 150 | | | 10 | | | — | | | 12,006 | | | Net realized gain (loss) | (237,953) | | | (2) | | | 5 | | | 4,006 | | | (233,944) | | | Net change in unrealized appreciation (depreciation) | 192,943 | | | (198) | | | (391) | | | (3,787) | | | 188,567 | | Transfers into Level 3 (1) | — | | | — | | | — | | | — | | | — | | Transfers out of Level 3 (1) | — | | | — | | | — | | | — | | | — | | | Fair value, end of period | $ | 12,330,802 | | | $ | 252,721 | | | $ | 12,498 | | | $ | 272,324 | | | $ | 12,868,345 | | Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of September 30, 2026 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations | $ | 194,982 | | | $ | (198) | | | $ | (391) | | | $ | (3,787) | | | $ | 190,606 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Nine Months Ended September 30, 2026 | | First Lien Debt | | Second Lien Debt | | Unsecured Debt | | Equity | | Total | | Fair value, beginning of period | $ | 13,759,817 | | | $ | 231,650 | | | $ | 12,278 | | | $ | 96,494 | | | $ | 14,100,239 | | | Purchases of investments | 925,793 | | | 28,482 | | | 1,963 | | | 192,317 | | | 1,148,555 | | | Proceeds from principal repayments and sales of investments | (2,001,125) | | | (2,819) | | | (11) | | | (16,928) | | | (2,020,883) | | | Accretion of discount (amortization of premium) | 35,509 | | | 423 | | | 29 | | | — | | | 35,961 | | | Net realized gain (loss) | (276,518) | | | 5 | | | 5 | | | 12,303 | | | (264,205) | | | Net change in unrealized appreciation (depreciation) | (103,528) | | | (5,020) | | | (1,766) | | | (11,862) | | | (122,176) | | Transfers into Level 3 (1) | — | | | — | | | — | | | — | | | — | | Transfers out of Level 3 (1) | (9,146) | | | — | | | — | | | — | | | (9,146) | | | Fair value, end of period | $ | 12,330,802 | | | $ | 252,721 | | | $ | 12,498 | | | $ | 272,324 | | | $ | 12,868,345 | | Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of September 30, 2026 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations | $ | (85,573) | | | $ | (5,020) | | | $ | (1,766) | | | $ | (11,192) | | | $ | (103,551) | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, 2025 | | First Lien Debt | | Second Lien Debt | | Unsecured Debt | | Equity | | Total | | Fair value, beginning of period | $ | 12,800,357 | | | $ | 122,942 | | | $ | 13,721 | | | $ | 99,506 | | | $ | 13,036,526 | | | Purchases of investments | 928,219 | | | 104,168 | | | 487 | | | 996 | | | 1,033,870 | | | Proceeds from principal repayments and sales of investments | (434,248) | | | (196) | | | — | | | (1,506) | | | (435,950) | | | Accretion of discount (amortization of premium) | 12,913 | | | 94 | | | 11 | | | — | | | 13,018 | | | Net realized gain (loss) | (9,270) | | | — | | | — | | | — | | | (9,270) | | | Net change in unrealized appreciation (depreciation) | (48,999) | | | (759) | | | (228) | | | (1,014) | | | (51,000) | | Transfers into Level 3 (1) | 8,360 | | | — | | | — | | | — | | | 8,360 | | Transfers out of Level 3 (1) | — | | | — | | | — | | | — | | | — | | | Fair value, end of period | $ | 13,257,332 | | | $ | 226,249 | | | $ | 13,991 | | | $ | 97,982 | | | $ | 13,595,554 | | Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of September 30, 2025 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations | $ | (54,660) | | | $ | (759) | | | $ | (228) | | | $ | (365) | | | $ | (56,012) | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Nine Months Ended September 30, 2025 | | First Lien Debt | | Second Lien Debt | | Unsecured Debt | | Equity | | Total | | Fair value, beginning of period | $ | 12,714,636 | | | $ | 119,184 | | | $ | 33,521 | | | $ | 109,424 | | | $ | 12,976,765 | | | Purchases of investments | 2,190,326 | | | 107,954 | | | 1,426 | | | 1,172 | | | 2,300,878 | | | Proceeds from principal repayments and sales of investments | (1,562,430) | | | (3,206) | | | (20,595) | | | (11,960) | | | (1,598,191) | | | Accretion of discount (amortization of premium) | 39,343 | | | 244 | | | 32 | | | — | | | 39,619 | | | Net realized gain (loss) | (9,292) | | | (1) | | | — | | | 7,316 | | | (1,977) | | | Net change in unrealized appreciation (depreciation) | (21,661) | | | 2,074 | | | (393) | | | (7,970) | | | (27,950) | | Transfers into Level 3 (1) | 8,585 | | | — | | | — | | | — | | | 8,585 | | Transfers out of Level 3 (1) | (102,175) | | | — | | | — | | | — | | | (102,175) | | | Fair value, end of period | $ | 13,257,332 | | | $ | 226,249 | | | $ | 13,991 | | | $ | 97,982 | | | $ | 13,595,554 | | Net change in unrealized appreciation (depreciation) included in earnings related to financial instruments still held as of September 30, 2025 included in net change in unrealized appreciation (depreciation) on the Condensed Consolidated Statements of Operations | $ | (25,068) | | | $ | 1,588 | | | $ | (663) | | | $ | (2,924) | | | $ | (27,067) | |
For the three and nine months ended September 30, 2026 and 2025, transfers into or out of Level 3 were primarily due to decreased or increased price transparency.The following tables present quantitative information about the significant unobservable inputs of the Company’s Level 3 financial instruments. These tables are not intended to be all-inclusive but instead capture the significant unobservable inputs relevant to the Company’s determination of fair value. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2026 | | | | | | | | Range | | | | Fair Value | | Valuation Technique | | Unobservable Input | | Low | | High | | Weighted Average (1) | | Investments in first lien debt | $ | 11,965,877 | | | Yield Analysis | | Discount Rate | | 7.42 | % | | 47.90 | % | | 10.95 | % | | 267,186 | | | Asset Recoverability | | Market Multiple | | 7.25x | | 12.75x | | 8.73x | | | | | | | | | | | | | | 97,739 | | | Market Quotations | | Broker quoted price | | 94.00 | | 99.48 | | 96.95 | | | | | | | | | | | | | | 12,330,802 | | | | | | | | | | | | | Investments in second lien debt | 252,721 | | | Yield Analysis | | Discount Rate | | 9.35 | % | | 21.54 | % | | 11.00 | % | | | | | | | | | | | | | | | | | | | | | | | | | | Investments in unsecured debt | 12,479 | | | Yield Analysis | | Discount Rate | | | | | | 17.77 | % | | 19 | | | Asset Recoverability | | Market Multiple | | | | | | 18.72x | | 12,498 | | | | | | | | | | | | | Investments in equity | 174,970 | | | Yield Analysis | | Discount Rate | | 10.25 | % | | 75.00 | % | | 14.37 | % | | 74,389 | | | Market Approach | | Performance Multiple | | 5.75x | | 26.50x | | 12.36x | | 11,104 | | | Asset Recoverability | | Market Multiple | | 7.25x | | 12.75x | | 9.33x | | 10,779 | | | Option Pricing Model | | Expected Volatility | | 32.00 | % | | 70.50 | % | | 32.37 | % | | 1,082 | | | Asset Recoverability | | Discount to Expected Proceeds | | 25.00 | % | | 85.00 | % | | 44.74 | % | | | | | | | | | | | | | | 272,324 | | | | | | | | | | | | | Total | $ | 12,868,345 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | | | | | | | Range | | | | Fair Value | | Valuation Technique | | Unobservable Input | | Low | | High | | Weighted Average (1) | | Investments in first lien debt | $ | 13,198,498 | | | Yield Analysis | | Discount Rate | | 6.94 | % | | 19.36 | % | | 9.44 | % | | 462,825 | | | Asset Recoverability | | Market Multiple | | 7.25x | | 12.47x | | 11.23x | | 98,494 | | | Market Quotations | | Broker quoted price | | 97.25 | | 100.00 | | 99.97 | | | | | | | | | | | | | | | | | | | | | | | | | | 13,759,817 | | | | | | | | | | | | | Investments in second lien debt | 231,650 | | | Yield Analysis | | Discount Rate | | 8.45 | % | | 15.78 | % | | 10.11 | % | | Investments in unsecured debt | 12,278 | | | Yield Analysis | | Discount Rate | | 15.10 | % | | 15.10 | % | | 15.10 | % | | Investments in equity | 62,579 | | | Market Approach | | Performance Multiple | | 6.40x | | 33.63x | | 12.28x | | 19,678 | | | Yield Analysis | | Discount Rate | | 12.50 | % | | 19.50 | % | | 15.08 | % | | 11,235 | | | Option Pricing Model | | Expected Volatility | | 32.00 | % | | 70.50 | % | | 33.34 | % | | 3,002 | | | Asset Recoverability | | Market Multiple | | 8.50x | | 16.00x | | 11.22x | | | | | | | | | | | | | | 96,494 | | | | | | | | | | | | | Total | $ | 14,100,239 | | | | | | | | | | | |
(1)Weighted averages are calculated based on fair value of investments. The significant unobservable input used in the yield analysis is the discount rate based on comparable market yields. Significant increases in discount rates would result in a significantly lower fair value measurement. The significant unobservable input used for market quotations are broker quoted prices provided by independent pricing services. The significant unobservable input used under the market approach is the Performance Multiple. The significant unobservable inputs used under the asset recoverability approach are the market multiple and the discount to expected proceeds. Significant decreases in quoted prices, Performance Multiples, or market multiples or significant increases to the discount to expected proceeds would result in a significantly lower fair value measurement. The significant input used in the option pricing model is expected volatility. Significant increases or decreases in expected volatility could result in a significantly higher or significantly lower fair market value measurement, respectively. Financial Instruments Not Carried at Fair Value Debt The fair value of the Company’s SPV Financing Facilities (as defined in Note 7) and Revolving Credit Facility (as defined in Note 7), as of September 30, 2026 and December 31, 2025, approximates their carrying value as the credit facilities have variable interest based on selected short-term rates. These financial instruments would be categorized as Level 3 within the fair value hierarchy. The following table presents the fair value measurements of the Company’s Unsecured Notes and Debt Securitization Notes (as defined in Note 7) had they been accounted for at fair value. These financial instruments would be categorized as Level 3 within the fair value hierarchy as of September 30, 2026 and December 31, 2025. | | | | | | | | | | | | | September 30, 2026 | | December 31, 2025 | | Fair Value | | Fair Value | | 2026 Notes | $ | — | | | $ | 799,357 | | | New 2026 Notes | — | | | 691,950 | |
| | | | | | | | | | | | | September 30, 2026 | | December 31, 2025 | | Fair Value | | Fair Value | | 2027 Notes | $ | 642,315 | | | $ | 632,710 | | | 2028 Notes | 610,735 | | | 615,550 | | | November 2027 Notes | 400,930 | | | 408,680 | | | April 2028 Notes | 694,057 | | | 706,370 | | | June 2030 Notes | 475,614 | | | 497,550 | | | January 2031 Notes | 467,187 | | | 494,000 | | | September 2029 Notes | 387,930 | | | — | | | May 2031 Notes | 621,082 | | | — | | | 2024-1 Notes | 457,509 | | | 457,450 | | | Total | $ | 4,757,359 | | | $ | 5,303,617 | |
Other Assets and Liabilities As of September 30, 2026 and December 31, 2025, the carrying amounts of the Company’s other assets and liabilities, other than investments at fair value, debt obligations listed above and derivative instruments listed in Note 6, approximate fair value due to their short maturities. These other assets and liabilities, with the exception of cash and cash equivalents (including money market funds classified within Cash and Cash Equivalents in the Condensed Consolidated Statements of Assets and Liabilities) which would be categorized as Level 1, would be categorized as Level 3 within the fair value hierarchy.
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