v3.26.1
Consolidated Statements of Changes in Net Assets - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Investment Company, Net Assets [Roll Forward]      
Beginning balance (in shares) 43,346,830.17 12,178,965.292 4,628,404.94
Beginning balance $ 650,202 $ 182,684 $ 69,426
Issuance of common stock (in shares) 26,693,590.969 30,448,083.954 7,334,065.187
Issuance of common stock $ 400,404 $ 456,721 $ 110,011
Net increase (decrease) in net assets resulting from operations:      
Net investment income - after tax 89,263 54,447 13,407
Net realized gain (loss) on investment transactions 263 185 (30)
Net change in unrealized appreciation (depreciation) on investment transactions $ 4,859 $ 14,328 $ 2,732
Distributions to stockholders:      
Stock issued in connection with dividend reinvestment plan (in shares) 1,196,571.794 719,780.924 216,495.165
Stock issued in connection with dividend reinvestment plan $ 17,949 $ 10,797 $ 3,247
Distributions from distributable earnings (losses) (74,594) (53,458) (12,129)
Distributions declared and payable (19,791) (15,502) (3,980)
Tax reclassification of stockholders equity in accordance with generally accepted accounting principles 0 0 0
Total increase (decrease) common stock, outstanding value $ 418,353 $ 467,518 $ 113,258
Ending balance (in shares) 71,236,992.933 43,346,830.17 12,178,965.292
Ending balance $ 1,068,555 $ 650,202 $ 182,684
Common Stock      
Investment Company, Net Assets [Roll Forward]      
Beginning balance (in shares) 43,346,830.17 12,178,965.292 4,628,404.94
Beginning balance $ 43 $ 12 $ 5
Issuance of common stock (in shares) 26,693,590.969 30,448,083.954 7,334,065.187
Issuance of common stock $ 27 $ 30 $ 7
Distributions to stockholders:      
Stock issued in connection with dividend reinvestment plan (in shares) 1,196,571.794 719,780.924 216,495.165
Stock issued in connection with dividend reinvestment plan $ 1 $ 1  
Total increase (decrease) common stock, outstanding (in shares) 27,890,162.763 31,167,864.878 7,550,560.352
Total increase (decrease) common stock, outstanding value $ 28 $ 31 $ 7
Ending balance (in shares) 71,236,992.933 43,346,830.17 12,178,965.292
Ending balance $ 71 $ 43 $ 12
Paid in Capital in Excess of Par      
Investment Company, Net Assets [Roll Forward]      
Beginning balance 649,853 182,525 69,421
Issuance of common stock 400,377 456,691 110,004
Distributions to stockholders:      
Stock issued in connection with dividend reinvestment plan 17,948 10,796 3,247
Tax reclassification of stockholders equity in accordance with generally accepted accounting principles (69) (159) (147)
Total increase (decrease) common stock, outstanding value 418,256 467,328 113,104
Ending balance 1,068,109 649,853 182,525
Distributable Earnings (Losses)      
Investment Company, Net Assets [Roll Forward]      
Beginning balance 306 147 0
Net increase (decrease) in net assets resulting from operations:      
Net investment income - after tax 89,263 54,447 13,407
Net realized gain (loss) on investment transactions 263 185 (30)
Net change in unrealized appreciation (depreciation) on investment transactions 4,859 14,328 2,732
Distributions to stockholders:      
Stock issued in connection with dividend reinvestment plan 0    
Distributions from distributable earnings (losses) (74,594) (53,458) (12,129)
Distributions declared and payable (19,791) (15,502) (3,980)
Tax reclassification of stockholders equity in accordance with generally accepted accounting principles 69 159 147
Total increase (decrease) common stock, outstanding value 69 159 147
Ending balance $ 375 $ 306 $ 147