Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Mar. 31, 2026		Sep. 30, 2025
Assets
Investments, at fair value	$ 8,317,245	[1]	$ 8,769,389	[2]
Cash	19,401		0
Cash equivalents	46,028		11,935
Foreign currencies (cost of $6,884 and $11,685, respectively)	6,763		11,681
Restricted cash	22,777		7,107
Restricted cash equivalents	40,210		81,720
Interest receivable	63,678		68,031
Receivable for investments	3,587		7,273
Net unrealized appreciation on derivatives	8,923		12,129
Other assets	1,085		9,034
Total Assets	8,529,697		8,978,299
Liabilities
Debt	4,723,905		4,926,778
Less unamortized debt issuance costs	(21,427)		(26,005)
Debt less unamortized debt issuance costs	4,702,478		4,900,773
Net unrealized depreciation on derivatives	0		5,023
Interest payable	33,891		38,254
Management and income incentive fees payable	36,533		40,884
Accrued trustee fees	646		1,039
Accounts payable and other liabilities	8,029		9,759
Total Liabilities	4,781,577		4,995,732
Commitments and Contingencies (Note 8)
Net Assets
Preferred stock, par value $0.001 per share, 1,000,000 shares authorized, zero shares issued and outstanding as of March 31, 2026 and September 30, 2025	0		0
Common stock, par value $0.001 per share, 500,000,000 shares authorized, 261,147,881 and 266,008,083 shares issued and outstanding as of March 31, 2026 and September 30, 2025, respectively	261		266
Paid in capital in excess of par	3,967,414		4,031,117
Distributable earnings (losses)	(219,555)		(48,816)
Total Net Assets	3,748,120		3,982,567
Total Liabilities and Total Net Assets	$ 8,529,697		$ 8,978,299
Number of common shares outstanding (in shares)	261,147,881		266,008,083
Net asset value per common share (in dollars per share)	$ 14.35		$ 14.97
Non-controlled/non-affiliate company investments
Assets
Investments, at fair value	$ 8,021,462	[1]	$ 8,463,764	[2]
Non-controlled affiliate company investments
Assets
Investments, at fair value	284,292	[1],[3]	293,763	[2],[4]
Controlled affiliate company investments
Assets
Investments, at fair value	$ 11,491	[1],[5]	$ 11,862	[2],[6]

[1] The fair values of investments were valued using significant unobservable inputs, unless noted otherwise. See Note 6. The fair value of loan investments may include the impact of the unfunded commitment being valued below par.

[2] The fair values of investments were valued using significant unobservable inputs, unless noted otherwise. See Note 6. The fair value of loan investments may include the impact of the unfunded commitment being valued below par.

[3] As defined in the 1940 Act, the Company is deemed to be an “affiliated person” of the portfolio company as the Company owns five percent or more of the portfolio company's voting securities (“non-controlled affiliate”). Transactions related to investments in non-controlled affiliates for the six months ended March 31, 2026 were as follows: Portfolio CompanyFair value as of September 30, 2025 Gross additions(a) Gross reductions(b) Net change in unrealized appreciation (depreciation)Net realized gain (loss) Fair value as of March 31, 2026 Interest, dividend and fee incomeAbita Brewing Co. LLC$5,216 $703 $— $(633)$— $5,286 $73 Bayside Opco, LLC33,986 932 (79)248 — 35,087 1,570 Benetech, Inc.2,089 — — 60 — 2,149 — Chestnut Optical Midco, Inc.101,952 5,142 — (556)— 106,538 1,599 Elite Dental Partners LLC10,692 1,471 — (2,619)— 9,544 184 Fleet Farm Group LLC33,243 433 — (1,861)— 31,815 442 G & H Wire Company, Inc.6,070 244 (41)(1,371)— 4,902 148 IMPLUS Footcare, LLC23,769 537 — 825 — 25,131 656 Opening Day Borrower 111 LLC23,236 1,520 — (7,853)— 16,903 288 Reaction Biology Corporation7,259 829 — (3,012)— 5,076 182 SPF Borrower LLC37,469 452 (82)(1,688)— 36,151 1,436 Switchfly LLC8,782 414 — (3,486)— 5,710 11 Total Non-Controlled Affiliates$293,763 $12,677 $(202)$(21,946)$— $284,292 $6,589  (a) Gross additions could include increases in the cost basis of investments resulting from new investments, amounts related to PIK interest capitalized and added to the principal balance of the respective loans, the accretion of discounts, the exchange of one or more existing investments for one or more new investments and the movement of an existing portfolio company into this affiliated category from a different category. (b) Gross reductions could include decreases in the cost basis of investments resulting from principal collections related to investment repayments and sales, the amortization of premiums, the reversal of capitalized PIK for non-accrual positions and the exchange of one or more existing securities for one or more new securities.

[4] As defined in the 1940 Act, the Company is deemed to be an “affiliated person” of the portfolio company as the Company owns five percent or more of the portfolio company's voting securities (“non-controlled affiliate”). Transactions related to investments in non-controlled affiliates for the year ended September 30, 2025 were as follows: Portfolio CompanyFair value as of September 30, 2024 Gross additions(a) Gross reductions(b) Net change in unrealized appreciation (depreciation)Net realized gain (loss)Fair value as of September 30, 2025Interest, dividend and fee incomeAbita Brewing Co. LLC$6,000 $11,690 $(9,725)$(2,749)$— $5,216 $114 Bayside Opco, LLC29,127 1,165 (156)3,850 — 33,986 3,263 Benetech, Inc.1,793 — (189)485 — 2,089 8  Chestnut Optical Midco, Inc.(c) 93,864 3,717 — 4,371 — 101,952 3,440 Elite Dental Partners LLC11,696 1,145 — (2,149)— 10,692 223 Fleet Farm Group LLC— 32,523 — 720 — 33,243 416 G & H Wire Company, Inc.— 6,657 — (587)— 6,070 251 IMPLUS Footcare, LLC— 23,769 — — — 23,769 238 Opening Day Borrower 111 LLC24,936 12,900 (8,225)(6,375)— 23,236 303 Reaction Biology Corporation— 10,426 (1,684)(1,483)— 7,259 182 SPF Borrower LLC36,653 620 (328)524 — 37,469 2,994 Switchfly LLC7,313 2,547 (1,427)349 — 8,782 26 Total Non-Controlled Affiliates$211,382 $107,159 $(21,734)$(3,044)$— $293,763 $11,458  (a) Gross additions could include increases in the cost basis of investments resulting from new investments, amounts related to PIK interest capitalized and added to the principal balance of the respective loans, the accretion of discounts, the exchange of one or more existing investments for one or more new investments and the movement of an existing portfolio company into this affiliated category from a different category. (b) Gross reductions could include decreases in the cost basis of investments resulting from principal collections related to investment repayments and sales, the amortization of premiums, the reversal of capitalized PIK for non-accrual positions and the exchange of one or more existing securities for one or more new securities. (c) Formerly known as Imperial Optical Midco Inc.

[5] As defined in the 1940 Act, the Company is deemed to be both an “affiliated person” of and “control” this portfolio company as the Company owns more than 25% of the portfolio company's outstanding voting securities or has the power to exercise control over management or policies of such portfolio company (including through a management agreement) (“controlled affiliate”). Transactions related to investments in controlled affiliates for the six months ended March 31, 2026 were as follows: Portfolio Company Fair value as of September 30, 2025 Gross additions(a) Gross reductions(b) Net change in unrealized appreciation (depreciation)Net realized gain (loss) Fair value as of March 31, 2026 Interest, dividend and fee incomeMMan Acquisition Co.$11,862 $264 $— $(635)$— $11,491 $274 Total Controlled Affiliates$11,862 $264 $— $(635)$— $11,491 $274  (a) Gross additions could include increases in the cost basis of investments resulting from new investments, amounts related to PIK interest capitalized and added to the principal balance of the respective loans, the accretion of discounts, the exchange of one or more existing investments for one or more new investments and the movement of an existing portfolio company into this affiliated category from a different category. (b) Gross reductions could include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the amortization of premiums, the reversal of capitalized PIK for non-accrual positions and the exchange of one or more existing securities for one or more new securities.

[6] As defined in the 1940 Act, the Company is deemed to be both an “affiliated person” of and “control” this portfolio company as the Company owns more than 25% of the portfolio company's outstanding voting securities or has the power to exercise control over management or policies of such portfolio company (including through a management agreement) (“controlled affiliate”). Transactions related to investments in controlled affiliates for the year ended September 30, 2025 were as follows: Portfolio CompanyFair value as of September 30, 2024 Gross additions(a) Gross reductions(b) Net change in unrealized appreciation (depreciation)Net realized gain (loss)Fair value as of September 30, 2025Interest, dividend and fee incomeMMan Acquisition Co.$12,205 $490 $— $(833)$— $11,862 $510 Total Controlled Affiliates$12,205 $490 $— $(833)$— $11,862 $510  (a) Gross additions could include increases in the cost basis of investments resulting from new investments, amounts related to PIK interest capitalized and added to the principal balance of the respective loans, the accretion of discounts, the exchange of one or more existing investments for one or more new investments and the movement of an existing portfolio company into this affiliated category from a different category. (b) Gross reductions could include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the amortization of premiums, the reversal of capitalized PIK for non-accrual positions and the exchange of one or more existing securities for one or more new securities.