v3.26.1
Fair Value Measurements (Tables)
9 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets Measured on Recurring Basis
The following tables present fair value measurements of the Company’s assets and liabilities recorded at fair value and indicate the fair value hierarchy of the valuation techniques utilized to determine such fair value as of June 30, 2026 and September 30, 2025:
As of June 30, 2026Fair Value Measurements Using
DescriptionLevel 1Level 2Level 3Total
Assets, at fair value:  
Debt investments(1)
$— $— $2,626,368 $2,626,368 
Equity investments(1)
— — 41,121 41,121 
Money market funds(1)(2)
39,950 — — 39,950 
Forward currency contracts— 51 — 51 
Total assets, at fair value:$39,950 $51 $2,667,489 $2,707,490 
Liabilities, at fair value:
Forward currency contracts$— $(554)$— $(554)
Total liabilities, at fair value:$— $(554)$— $(554)
As of September 30, 2025Fair Value Measurements Using
DescriptionLevel 1Level 2Level 3Total
Assets, at fair value:
Debt investments(1)
$— $— $2,174,044 $2,174,044 
Equity investments(1)
— — 35,130 35,130 
Money market funds(1)(2)
46,041 — — 46,041 
Total assets, at fair value:$46,041 $— $2,209,174 $2,255,215 
Liabilities, at fair value:
Forward currency contracts$— $(864)$— $(864)
Total liabilities, at fair value:$— $(864)$— $(864)

(1) Refer to the Consolidated Schedules of Investments for further details.
(2) Included in “Cash equivalents” and “Restricted cash equivalents” on the Consolidated Statements of Financial Condition.
Schedule of Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
The following tables present the changes in investments measured at fair value using Level 3 inputs for the nine months ended June 30, 2026 and 2025:
For the nine months ended June 30, 2026
  Debt
Investments
Equity
Investments
Total
Investments
Fair value, beginning of period
$2,174,044 $35,130 $2,209,174 
Net change in unrealized appreciation (depreciation) on investments (33,984)(1,772)(35,756)
Net translation of investments in foreign currencies(4,225)(10)(4,235)
Realized gain (loss) on investments64 1,255 1,319 
Realized gain (loss) on translation of investments in foreign currencies823 — 823 
Fundings of (proceeds from) revolving loans, net15,684 — 15,684 
Fundings of investments626,595 16,480 643,075 
PIK interest and non-cash dividends11,390 711 12,101 
Proceeds from non-cash dividends— (111)(111)
Proceeds from principal payments and sales of portfolio investments(169,194)(10,562)(179,756)
Accretion of discounts and amortization of premiums5,171 — 5,171 
Fair value, end of period
$2,626,368 $41,121 $2,667,489 
For the nine months ended June 30, 2025
Debt
Investments
Equity
Investments
Total
Investments
Fair value, beginning of period
$1,294,931 $16,070 $1,311,001 
Net change in unrealized appreciation (depreciation) on investments1,803 2,257 4,060 
Net translation of investments in foreign currencies9,225 — 9,225 
Realized gain (loss) on translation of investments in foreign currencies105 — 105 
Fundings of (proceeds from) revolving loans, net5,697 — 5,697 
Fundings of investments623,803 12,373 636,176 
PIK interest and non-cash dividends6,973 387 7,360 
Proceeds from non-cash dividends— (170)(170)
Proceeds from principal payments and sales of portfolio investments(81,345)(349)(81,694)
Accretion of discounts and amortization of premiums3,722 — 3,722 
Fair value, end of period
$1,864,914 $30,568 $1,895,482 
Schedule of Fair Value Measurement Inputs and Valuation Techniques
The following tables present quantitative information about the significant unobservable inputs of the Company’s Level 3 investments as of June 30, 2026 and September 30, 2025:

Quantitative Information about Level 3 Fair Value Measurements
Fair Value as of
June 30, 2026
Valuation TechniquesUnobservable Input
Range (Weighted Average)(1)
Assets:      
Senior secured loans$120,063 Yield analysisMarket interest rate
8.5% - 10.3% (8.8%)
Market comparable companiesEBITDA multiples
5.5x - 20.5x (10.6x)
One stop loans(2)(3)
$2,456,010 Yield analysisMarket interest rate
7.5% - 21.0% (9.5%)
Market comparable companiesEBITDA multiples
7.5x - 29.3x (14.7x)
Revenue multiples
1.3x - 14.0x (8.2x)
24,718 Broker/dealer bids or quotesBroker/dealer bids or quotes
N/A
Subordinated debt and second lien loans$25,577 Yield analysisMarket interest rate
10.5% - 13.5% (11.5%)
Market comparable companiesEBITDA multiples
9.5x - 21.0x (18.4x)
Equity(4)
$41,121 Market comparable companiesEBITDA multiples
5.5x - 26.0x (16.1x)
Revenue multiples
1.3x - 14.0x (9.9x)
(1)Unobservable inputs were weighted by the relative fair value of the instruments.
(2)$2,274 of loans at fair value were valued using the market comparable companies approach only.
(3)The Company valued $2,173,599 and $282,411 of one stop loans using EBITDA and revenue multiples, respectively.
(4)The Company valued $33,790 and $7,331 of equity investments using EBITDA and revenue multiples, respectively.
Quantitative Information about Level 3 Fair Value Measurements
Fair Value as of September 30, 2025
Valuation TechniquesUnobservable Input
Range (Weighted Average)(1)
Assets:
Senior secured loans$77,408 Yield analysisMarket interest rate
7.3% - 9.0% (8.3%)
Market comparable companiesEBITDA multiples
6.0x - 20.0x (10.6x)
One stop loans(2)(3)
$2,043,193 Yield analysisMarket interest rate
3.8% - 20.5% (8.6%)
Market comparable companiesEBITDA multiples
8.0x - 33.0x (15.8x)
Revenue multiples
2.0x - 15.0x (9.1x)
$19,980 Broker/dealer bids or quotesBroker/dealer bids or quotesN/A
Subordinated debt and second lien loans(4)
$33,463 Yield analysisMarket interest rate
9.8% - 15.0% (11.1%)
Market comparable companiesEBITDA multiples
9.5x - 24.0x (17.8x)
Equity(5)
$35,130 Market comparable companiesEBITDA multiples
8.0x - 28.0x (17.4x)
Revenue multiples
2.0x - 15.0x (11.3x)
(1)Unobservable inputs were weighted by the relative fair value of the instruments.
(2)$49 of loans at fair value were valued using the market comparable companies approach only.
(3)The Company valued $1,758,059 and $285,134 of one stop loans using EBITDA and revenue multiples, respectively.
(4)$66 of loans at fair value were valued using the market comparable companies approach only.
(5)The Company valued $29,941 and $5,189 of equity investments using EBITDA and revenue multiples, respectively.
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments
The following are the carrying values and fair values of the Company’s debt as of June 30, 2026 and September 30, 2025:
As of June 30, 2026As of September 30, 2025
  Carrying ValueFair ValueCarrying ValueFair Value
Debt$1,496,929 $1,496,929 $1,189,555 $1,189,555