Quarterly report [Sections 13 or 15(d)]

CONSOLIDATED SCHEDULE OF INVESTMENTS (Parenthetical)

v3.26.1
CONSOLIDATED SCHEDULE OF INVESTMENTS (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 198.20% [1],[2],[3],[4] 195.90% [5],[6],[7],[8],[9]
Cash equivalents, net assets, percentage 0.00% [1],[2],[3],[4] 0.00% [5],[6],[7],[9]
Investment and cash equivalents, net assets, percentage 198.20% [1],[2],[3],[4] 195.90% [5],[6],[7],[9]
Investments owned, fair value $ 1,282,020 $ 1,309,248 [8]
Percentage threshold of qualified assets representing total assets in order to acquire non-qualified assets 70.00%  
Investment, interest rate, paid in cash 3.70% 3.70%
Cumulative net unrealized appreciation   $ 428,500
Cumulative gross unrealized depreciation   173,700
Cumulative gross unrealized appreciation for federal income tax purposes   254,800
Based on a tax cost   $ 1,100,000
Pyrotek Special Effects, Inc. And Gladstone Alternative    
Schedule of Investments [Line Items]    
Percentage of acquired non-qualifying assets of total assets 2.20% 2.10%
Investment, Identifier [Axis]: B+T Group Acquisition, Inc. - Common Stock Warrants    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 0 $ 0
Investment, Identifier [Axis]: B+T Group Acquisition, Inc. – Common Stock Warrants    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 0 [10],[11],[12] $ 0 [13],[14]
Investment, Identifier [Axis]: B+T Group Acquisition, Inc. – Line of Credit 1    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 2.00% [1],[2],[3],[4],[10],[11],[15] 2.00% [5],[6],[7],[9],[14],[16],[17]
Investment interest rate 7.00% [1],[2],[3],[4],[10],[11],[15] 7.00% [5],[6],[7],[9],[14],[16],[17]
Line of credit facility, available $ 0 [1],[2],[3],[4],[10],[11],[15] $ 0 [5],[6],[7],[9],[14],[16],[17]
Investments owned, fair value $ 3,080 [10],[11],[15] $ 3,080 [14],[16],[17]
Investment, Identifier [Axis]: B+T Group Acquisition, Inc. – Line of Credit 2    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 2.00% [1],[2],[3],[4],[10],[11],[15] 2.00% [5],[6],[7],[9],[14],[16],[17]
Investment interest rate 7.00% [1],[2],[3],[4],[10],[11],[15] 7.00% [5],[6],[7],[9],[14],[16],[17]
Line of credit facility, available $ 0 [1],[2],[3],[4],[10],[11],[15] $ 0 [5],[6],[7],[9],[14],[16],[17]
Investments owned, fair value 1,050 [10],[11],[15] 1,050 [14],[16],[17]
Investment, Identifier [Axis]: B+T Group Acquisition, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 0 0 [13],[14]
Investment, Identifier [Axis]: B+T Group Acquisition, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[10],[11],[15] 2.00%  
Investment interest rate [1],[2],[3],[4],[10],[11],[15] 7.00%  
Investments owned, fair value $ 3,329 [10],[11],[15] $ 3,812
Investment, Identifier [Axis]: B+T Group Acquisition, Inc. – Term Debt 1    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14],[16],[17]   2.00%
Investment interest rate [5],[6],[7],[9],[14],[16],[17]   7.00%
Investments owned, fair value [14],[16],[17]   $ 3,812
Investment, Identifier [Axis]: B+T Group Acquisition, Inc.– Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value [10],[11],[12] 0  
Investment, Identifier [Axis]: Brunswick Bowling Products, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 52,374 [11],[12] $ 49,815 [13],[14]
Investment, Identifier [Axis]: Brunswick Bowling Products, Inc. – Term Debt 1    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 10.00% [1],[2],[3],[4],[11] 10.00% [5],[6],[7],[9],[14]
Investment interest rate 13.70% [1],[2],[3],[4],[11] 13.70% [5],[6],[7],[9],[14]
Investments owned, fair value $ 17,700 [11] $ 17,700 [14]
Investment, Identifier [Axis]: Brunswick Bowling Products, Inc. – Term Debt 2    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 10.00% [1],[2],[3],[4],[11] 10.00% [5],[6],[7],[9],[14]
Investment interest rate 13.70% [1],[2],[3],[4],[11] 13.70% [5],[6],[7],[9],[14]
Investments owned, fair value $ 6,850 [11] $ 6,850 [14]
Investment, Identifier [Axis]: Dema/Mai Holdings, Inc - Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value [11],[12] $ 26,580  
Investment, Identifier [Axis]: Dema/Mai Holdings, Inc – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[11] 11.00%  
Investment interest rate [1],[2],[3],[4],[11] 14.70%  
Investments owned, fair value [11] $ 38,250  
Investment, Identifier [Axis]: Dema/Mai Holdings, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value [13],[14]   $ 30,737
Investment, Identifier [Axis]: Dema/Mai Holdings, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14]   11.00%
Investment interest rate [5],[6],[7],[9],[14]   14.70%
Investments owned, fair value [14]   $ 38,250
Investment, Identifier [Axis]: Detroit Defense, Inc. - Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value [10],[11],[12] $ 1,771  
Investment, Identifier [Axis]: Detroit Defense, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value [13],[14],[18]   $ 12,572
Investment, Identifier [Axis]: Detroit Defense, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 9.00% [1],[2],[3],[4],[10],[11] 9.00% [5],[6],[7],[9],[14],[17],[18]
Investment interest rate 13.00% [1],[2],[3],[4],[10],[11] 13.00% [5],[6],[7],[9],[14],[17],[18]
Investments owned, fair value $ 61,305 [10],[11] $ 61,305 [14],[17],[18]
Investment, Identifier [Axis]: Diligent Delivery Systems – Common Stock Warrants    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 0 [11],[12] $ 0 [13],[14]
Investment, Identifier [Axis]: Diligent Delivery Systems – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 9.00% [1],[2],[3],[4],[11],[15] 9.00% [5],[6],[7],[9],[14],[16]
Investment interest rate 12.70% [1],[2],[3],[4],[11],[15] 12.70% [5],[6],[7],[9],[14],[16]
Investments owned, fair value $ 4,279 [11],[15] $ 512 [14],[16]
Investment, Identifier [Axis]: Dreyfus Treasury Obligations Cash Management Fund    
Schedule of Investments [Line Items]    
Investment interest rate 3.29% [1],[2],[3],[4],[19] 3.30% [5],[6],[7],[9],[20]
Investment, Identifier [Axis]: Edge Adhesives Holdings, Inc - Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[10],[11],[15] 5.50%  
Investment interest rate [1],[2],[3],[4],[10],[11],[15] 9.20%  
Investments owned, fair value $ 504 [10],[11],[15] $ 613
Investment, Identifier [Axis]: Edge Adhesives Holdings, Inc. - Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value [10],[11],[12] 0  
Investment, Identifier [Axis]: Edge Adhesives Holdings, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value 0 $ 0 [13],[14],[17]
Investment, Identifier [Axis]: Edge Adhesives Holdings, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14],[16]   5.50%
Investment interest rate [5],[6],[7],[9],[14],[16]   9.20%
Investments owned, fair value [14],[16]   $ 613
Investment, Identifier [Axis]: Educators Resource, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 11,823 [11],[12] $ 11,630 [13],[14]
Investment, Identifier [Axis]: Educators Resource, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 10.50% [1],[2],[3],[4],[11] 10.50% [5],[6],[7],[9],[14]
Investment interest rate 14.20% [1],[2],[3],[4],[11] 14.20% [5],[6],[7],[9],[14]
Investments owned, fair value $ 30,000 [11] $ 30,000 [14]
Investment, Identifier [Axis]: Galaxy Technologies Holdings, Inc. – Common Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 12,648 [11],[12] $ 3,447 [13],[14]
Investment, Identifier [Axis]: Galaxy Technologies Holdings, Inc. – Term Debt 1    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 4.10% [1],[2],[3],[4],[11] 4.10% [5],[6],[7],[9],[14]
Investment interest rate 7.80% [1],[2],[3],[4],[11] 7.80% [5],[6],[7],[9],[14]
Investments owned, fair value $ 6,900 [11] $ 6,900 [14]
Investment, Identifier [Axis]: Galaxy Technologies Holdings, Inc. – Term Debt 2    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 7.00% [1],[2],[3],[4],[11] 7.00% [5],[6],[7],[9],[14]
Investment interest rate 10.70% [1],[2],[3],[4],[11] 10.70% [5],[6],[7],[9],[14]
Investments owned, fair value $ 18,796 [11] $ 18,796 [14]
Investment, Identifier [Axis]: Ginsey Home Solutions, Inc. – Common Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value 0 [11],[12] 0 [13],[14]
Investment, Identifier [Axis]: Ginsey Home Solutions, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 13,645 [11],[12] $ 12,258 [13],[14]
Investment, Identifier [Axis]: Ginsey Home Solutions, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 10.00% [1],[2],[3],[4],[11] 10.00% [5],[6],[7],[9],[14]
Investment interest rate 13.70% [1],[2],[3],[4],[11] 13.70% [5],[6],[7],[9],[14]
Investments owned, fair value $ 12,200 [11] $ 12,200 [14]
Investment, Identifier [Axis]: Gladstone Alternative Income Fund – Common Equity    
Schedule of Investments [Line Items]    
Investments owned, fair value 4,945 5,005 [13],[21]
Investment, Identifier [Axis]: Gladstone Alternative Income Fund. – Common Equity    
Schedule of Investments [Line Items]    
Investments owned, fair value [12],[22] 4,945  
Investment, Identifier [Axis]: Global GRAB Technologies, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 21,134 [11],[12] $ 25,022 [13],[14]
Investment, Identifier [Axis]: Global GRAB Technologies, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14]   9.00%
Investment interest rate [5],[6],[7],[9],[14]   13.50%
Investments owned, fair value [14]   $ 46,500
Investment, Identifier [Axis]: Global GRAB Technologies, Inc. –Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[11] 9.00%  
Investment interest rate [1],[2],[3],[4],[11] 13.50%  
Investments owned, fair value [11] $ 46,500  
Investment, Identifier [Axis]: Home Concepts Acquisition, Inc. - Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[11] 9.00%  
Investment interest rate [1],[2],[3],[4],[11] 13.00%  
Investments owned, fair value [11] $ 3,000  
Investment, Identifier [Axis]: Home Concepts Acquisition, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value [13],[14]   $ 0
Investment, Identifier [Axis]: Home Concepts Acquisition, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14]   9.00%
Investment interest rate [5],[6],[7],[9],[14]   13.00%
Investments owned, fair value [14]   $ 8,379
Investment, Identifier [Axis]: Home Concepts Acquisition, Inc.- Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value [11],[12] 311  
Investment, Identifier [Axis]: Horizon Facilities Services, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 0 [11],[12] $ 0 [13],[14]
Investment, Identifier [Axis]: Horizon Facilities Services, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 0.50% [1],[2],[3],[4],[11] 0.50% [5],[6],[7],[9],[14]
Investment interest rate 6.00% [1],[2],[3],[4],[11] 6.00% [5],[6],[7],[9],[14]
Investments owned, fair value $ 15,770 [11] $ 16,545 [14]
Investment, Identifier [Axis]: ImageWorks Display and Marketing Group, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value 33,537 [11],[12] $ 30,453 [13],[14]
Investment, Identifier [Axis]: ImageWorks Display and Marketing Group, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14]   11.00%
Investment interest rate [5],[6],[7],[9],[14]   14.70%
Investments owned, fair value [14]   $ 22,000
Investment, Identifier [Axis]: ImageWorks Display and Marketing Group, Inc. – Term Debt 1    
Schedule of Investments [Line Items]    
Investments owned, fair value [11] $ 22,000  
Investment, Identifier [Axis]: ImageWorks Display and Marketing Group, Inc. – Term Debt 2    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[11] 11.00%  
Investment interest rate [1],[2],[3],[4],[11] 14.70%  
Investments owned, fair value $ 22,000 $ 22,000
Investment, Identifier [Axis]: J.R. Hobbs Co. - Atlanta, LLC - Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14]   6.00%
Investment interest rate [5],[6],[7],[9],[14]   10.00%
Investments owned, fair value [14]   $ 20,000
Investment, Identifier [Axis]: J.R. Hobbs Co. - Atlanta, LLC – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[11] 6.00%  
Investment interest rate [1],[2],[3],[4],[11] 10.00%  
Investments owned, fair value $ 20,000 [11] 20,000
Investment, Identifier [Axis]: J.R. Hobbs Co. – Atlanta, LLC – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value 10,183 [11],[12] 9,236 [13],[14]
Investment, Identifier [Axis]: Mason West, LLC – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 20,047 [11],[12] $ 19,235 [13],[14]
Investment, Identifier [Axis]: Mason West, LLC – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 10.00% [1],[2],[3],[4],[11] 10.00% [5],[6],[7],[9],[14]
Investment interest rate 13.70% [1],[2],[3],[4],[11] 13.70% [5],[6],[7],[9],[14]
Investments owned, fair value $ 25,250 [11] $ 25,250 [14]
Investment, Identifier [Axis]: Nielsen-Kellerman Acquisition Corp. - Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[10],[11] 8.50%  
Investment interest rate [1],[2],[3],[4],[10],[11] 13.50%  
Investments owned, fair value $ 48,082 [10],[11] $ 48,082
Investment, Identifier [Axis]: Nielsen-Kellerman Acquisition Corp. TL - Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14],[17]   8.50%
Investment interest rate [5],[6],[7],[9],[14],[17]   13.50%
Investments owned, fair value [14],[17]   $ 48,082
Investment, Identifier [Axis]: Nielsen-Kellerman Acquisition Corp. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value 14,886 [10],[11],[12] 14,641 [13],[14]
Investment, Identifier [Axis]: Nielsen-Kellerman Acquisition Corp.– Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value 14,886 14,641
Investment, Identifier [Axis]: Old World Christmas, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 32,577 [11],[12] 29,730 [13],[14]
Investment, Identifier [Axis]: Old World Christmas, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[11] 9.50%  
Investment interest rate [1],[2],[3],[4],[11] 13.20%  
Investments owned, fair value $ 38,000 [11] $ 38,000
Investment, Identifier [Axis]: Old World Christmas, Inc. – Term Loan    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14]   9.50%
Investment interest rate [5],[6],[7],[9],[14]   13.20%
Investments owned, fair value [14]   $ 38,000
Investment, Identifier [Axis]: PSI Molded Plastics, Inc. – Line of Credit    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[11] 1.00%  
Investment interest rate [1],[2],[3],[4],[11] 7.00%  
Line of credit facility, available [1],[2],[3],[4],[11] $ 0  
Investments owned, fair value 2,000 [11] $ 1,400
Investment, Identifier [Axis]: PSI Molded Plastics, Inc. – Line of Credit 1    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14]   1.00%
Investment interest rate [5],[6],[7],[9],[14]   7.00%
Line of credit facility, available [5],[6],[7],[9],[14]   $ 600
Investments owned, fair value [14]   1,400
Investment, Identifier [Axis]: PSI Molded Plastics, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 5,510 [11],[12] $ 4,928 [13],[14]
Investment, Identifier [Axis]: PSI Molded Plastics, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 1.00% [1],[2],[3],[4],[11] 1.00% [5],[6],[7],[9],[14]
Investment interest rate 7.00% [1],[2],[3],[4],[11] 7.00% [5],[6],[7],[9],[14]
Investments owned, fair value $ 400 [11] $ 400 [14]
Investment, Identifier [Axis]: Phoenix Door Systems, Inc – Line of Credit    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 7.00% [1],[2],[3],[4],[11] 7.00% [5],[6],[7],[9],[14]
Investment interest rate 10.70% [1],[2],[3],[4],[11] 10.70% [5],[6],[7],[9],[14]
Line of credit facility, available $ 0 [1],[2],[3],[4],[11] $ 0 [5],[6],[7],[9],[14]
Unused fee percentage 0.30% [1],[2],[3],[4],[11] 0.30% [5],[6],[7],[9],[14]
Investments owned, fair value $ 2,950 [11] $ 2,950 [14]
Investment, Identifier [Axis]: Phoenix Door Systems, Inc. – Common Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 136 [11],[12] $ 0 [13],[14]
Investment, Identifier [Axis]: Phoenix Door Systems, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 11.00% [1],[2],[3],[4],[11] 11.00% [5],[6],[7],[9],[14]
Investment interest rate 14.70% [1],[2],[3],[4],[11] 14.70% [5],[6],[7],[9],[14]
Investments owned, fair value $ 3,200 [11] $ 3,200 [14]
Investment, Identifier [Axis]: Pyrotek Special Effects, Inc. - Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 8.00% [1],[2],[3],[4],[11],[23] 8.00% [5],[6],[7],[9],[14],[24]
Investment interest rate 13.00% [1],[2],[3],[4],[11],[23] 13.00% [5],[6],[7],[9],[14],[24]
Investments owned, fair value $ 20,120 [11],[23] $ 20,120 [14],[24]
Investment, Identifier [Axis]: Pyrotek Special Effects, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value 3,620 1,835
Investment, Identifier [Axis]: Pyrotek Special Effects, Inc.. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value 3,620 [11],[12],[23] 1,835 [13],[14],[24]
Investment, Identifier [Axis]: Rowan Energy Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 4,065 [11],[12] $ 7,495 [13],[14]
Investment, Identifier [Axis]: Rowan Energy Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 9.00% [1],[2],[3],[4],[11] 9.00% [5],[6],[7],[9],[14]
Investment interest rate 14.50% [1],[2],[3],[4],[11] 14.50% [5],[6],[7],[9],[14]
Investments owned, fair value $ 25,790 [11] $ 25,790 [14]
Investment, Identifier [Axis]: SFEG Holdings, Inc. – Common Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 167,361 [12],[25] $ 204,048 [13],[14]
Investment, Identifier [Axis]: SFEG Holdings, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14]   7.00%
Investment interest rate [5],[6],[7],[9],[14]   12.50%
Investments owned, fair value [14]   $ 54,644
Investment, Identifier [Axis]: SFEG Holdings, Inc. – Term Debt 1    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[25] 7.00%  
Investment interest rate [1],[2],[3],[4],[25] 12.50%  
Investments owned, fair value [25] $ 54,644  
Investment, Identifier [Axis]: Schylling, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 69,829 [11],[12] $ 66,403 [13],[14]
Investment, Identifier [Axis]: Schylling, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 11.00% [1],[2],[3],[4],[11] 11.00% [5],[6],[7],[9],[14]
Investment interest rate 14.70% [1],[2],[3],[4],[11] 14.70% [5],[6],[7],[9],[14]
Investments owned, fair value $ 16,981 [11] $ 16,981 [14]
Investment, Identifier [Axis]: Smart Chemical Solutions, LLC - Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 8,929 [10],[11],[12] $ 7,327 [13],[14],[17]
Investment, Identifier [Axis]: Smart Chemical Solutions, LLC – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 9.00% [1],[2],[3],[4],[10],[11] 9.00% [5],[6],[7],[9],[14],[17]
Investment interest rate 13.50% [1],[2],[3],[4],[10],[11] 13.50% [5],[6],[7],[9],[14],[17]
Investments owned, fair value $ 35,660 [10],[11] $ 35,660 [14],[17]
Investment, Identifier [Axis]: Sun State Nursery and Landscaping, LLC – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 4,271 [11],[12] $ 3,718 [13],[14]
Investment, Identifier [Axis]: Sun State Nursery and Landscaping, LLC – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 9.00% [1],[2],[3],[4],[11] 9.00% [5],[6],[7],[9],[14]
Investment interest rate 13.50% [1],[2],[3],[4],[11] 13.50% [5],[6],[7],[9],[14]
Investments owned, fair value $ 9,520 [11] $ 9,520 [14]
Investment, Identifier [Axis]: The E3 Company, LLC – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 59,945 [11],[12] $ 58,570 [13],[14]
Investment, Identifier [Axis]: The E3 Company, LLC – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread 9.00% [1],[2],[3],[4],[11] 9.00% [5],[6],[7],[9],[14]
Investment interest rate 13.50% [1],[2],[3],[4],[11] 13.50% [5],[6],[7],[9],[14]
Investments owned, fair value $ 33,750 [11] $ 33,750 [14]
Investment, Identifier [Axis]: The Maids International, LLC - Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value 4,899 4,631
Investment, Identifier [Axis]: The Maids International, LLC – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 4,899 [11],[12] 4,631 [13],[14]
Investment, Identifier [Axis]: The Maids International, LLC – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[11] 10.50%  
Investment interest rate [1],[2],[3],[4],[11] 14.20%  
Investments owned, fair value $ 28,560 [11] $ 28,560
Investment, Identifier [Axis]: The Maids International, LLC – Term Debt 1    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14]   10.50%
Investment interest rate [5],[6],[7],[9],[14]   14.20%
Investments owned, fair value [14]   $ 28,560
Investment, Identifier [Axis]: UPB Acquisition, Inc. - Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value 29,574 $ 26,713
Investment, Identifier [Axis]: UPB Acquisition, Inc. - Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [5],[6],[7],[9],[14]   10.00%
Investment interest rate [5],[6],[7],[9],[14]   13.70%
Investments owned, fair value [14]   $ 11,000
Investment, Identifier [Axis]: UPB Acquisition, Inc. – Preferred Stock    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 29,574 [11],[12] 26,713 [13],[14]
Investment, Identifier [Axis]: UPB Acquisition, Inc. – Term Debt    
Schedule of Investments [Line Items]    
Investment, reference rate and spread [1],[2],[3],[4],[11] 10.00%  
Investment interest rate [1],[2],[3],[4],[11] 13.70%  
Investments owned, fair value $ 11,000 [11] 11,000
Collateral Pledged    
Schedule of Investments [Line Items]    
Investments owned, fair value 1,100,000 1,200,000
Aerospace and Defense    
Schedule of Investments [Line Items]    
Investments owned, fair value 169,054 174,542
Buildings and Real Estate    
Schedule of Investments [Line Items]    
Investments owned, fair value 64,830 68,987
Chemicals, Plastics, and Rubber    
Schedule of Investments [Line Items]    
Investments owned, fair value 52,499 49,715
Diversified/Conglomerate Services    
Schedule of Investments [Line Items]    
Investments owned, fair value 194,037 189,148
Healthcare, Education, and Childcare    
Schedule of Investments [Line Items]    
Investments owned, fair value 41,823 41,630
Home and Office Furnishings, Housewares, and Durable Consumer Products    
Schedule of Investments [Line Items]    
Investments owned, fair value 173,346 166,553
Leisure, Amusement, Motion Pictures, and Entertainment    
Schedule of Investments [Line Items]    
Investments owned, fair value 110,550 105,339
Oil and Gas    
Schedule of Investments [Line Items]    
Investments owned, fair value 123,550 125,605
Machinery (Non-Agriculture, Non-Construction, and Non-Electronic)    
Schedule of Investments [Line Items]    
Investments owned, fair value 222,005 258,692
Electronics    
Schedule of Investments [Line Items]    
Investments owned, fair value 62,968 62,723
Mining, Steel, Iron and Non-Precious Metals    
Schedule of Investments [Line Items]    
Investments owned, fair value 40,574 37,713
Telecommunications    
Schedule of Investments [Line Items]    
Investments owned, fair value 7,459 7,942
Secured First Lien Debt    
Schedule of Investments [Line Items]    
Investments owned, fair value 564,631 570,602
Secured Second Lien Debt    
Schedule of Investments [Line Items]    
Investments owned, fair value 102,789 99,197
Preferred Equity    
Schedule of Investments [Line Items]    
Investments owned, fair value 429,510 426,949
Common Equity/ Equivalents    
Schedule of Investments [Line Items]    
Investments owned, fair value $ 185,090 $ 212,500
Non-Control/Non-Affiliate Investments    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 145.90% [1],[2],[3],[4],[26] 147.20% [5],[6],[7],[9],[27]
Investments owned, fair value $ 944,164 [26] $ 983,959 [27]
Non-Control/Non-Affiliate Investments | Secured First Lien Debt    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 57.00% [1],[2],[3],[4],[26] 56.00% [5],[6],[7],[9],[27]
Investments owned, fair value $ 368,906 [26] $ 374,285 [27]
Non-Control/Non-Affiliate Investments | Secured First Lien Debt | Aerospace and Defense    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 16.70% [1],[2],[3],[4],[26] 16.10% [5],[6],[7],[9],[27]
Investments owned, fair value $ 107,805 [26] $ 107,805 [27]
Non-Control/Non-Affiliate Investments | Secured First Lien Debt | Buildings and Real Estate    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 5.90% [1],[2],[3],[4],[26] 5.70% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Secured First Lien Debt | Chemicals, Plastics, and Rubber    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 5.50% [1],[2],[3],[4],[26] 5.30% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Secured First Lien Debt | Diversified/Conglomerate Manufacturing    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.90% [1],[2],[3],[4],[26] 0.90% [5],[6],[7],[9],[27]
Investments owned, fair value $ 6,150 [26] $ 6,150 [27]
Non-Control/Non-Affiliate Investments | Secured First Lien Debt | Diversified/Conglomerate Services    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 5.40% [1],[2],[3],[4],[26] 5.20% [5],[6],[7],[9],[27]
Investments owned, fair value $ 34,770 [26] $ 34,770 [27]
Non-Control/Non-Affiliate Investments | Secured First Lien Debt | Healthcare, Education, and Childcare    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 4.60% [1],[2],[3],[4],[26] 4.50% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Secured First Lien Debt | Home and Office Furnishings, Housewares, and Durable Consumer Products    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 5.70% [1],[2],[3],[4],[26] 5.50% [5],[6],[7],[9],[27]
Investments owned, fair value $ 36,750 [26] $ 36,750 [27]
Non-Control/Non-Affiliate Investments | Secured First Lien Debt | Leisure, Amusement, Motion Pictures, and Entertainment    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 2.60% [1],[2],[3],[4],[26] 2.50% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Secured First Lien Debt | Oil and Gas    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 9.20% [1],[2],[3],[4],[26] 9.00% [5],[6],[7],[9],[27]
Investments owned, fair value $ 59,540 [26] $ 59,540 [27]
Non-Control/Non-Affiliate Investments | Secured First Lien Debt | Printing and Publishing    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.50% [1],[2],[3],[4],[26] 1.30% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Secured Second Lien Debt    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 15.50% [1],[2],[3],[4],[26] 14.60% [5],[6],[7],[9],[27]
Investments owned, fair value $ 100,389 [26] $ 97,397 [27]
Non-Control/Non-Affiliate Investments | Secured Second Lien Debt | Aerospace and Defense    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 4.00% [1],[2],[3],[4],[26] 3.80% [5],[6],[7],[9],[27]
Investments owned, fair value $ 25,696 [26] $ 25,696 [27]
Non-Control/Non-Affiliate Investments | Secured Second Lien Debt | Diversified/Conglomerate Services    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 2.40% [1],[2],[3],[4],[26] 2.50% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Secured Second Lien Debt | Cargo Transport    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.70% [1],[2],[3],[4],[26] 0.10% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Secured Second Lien Debt | Machinery (Non-Agriculture, Non-Construction, and Non-Electronic)    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 8.40% [1],[2],[3],[4],[26] 8.20% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Preferred Equity    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 45.50% [1],[2],[3],[4],[26] 45.60% [5],[6],[7],[9],[27]
Investments owned, fair value $ 294,724 [26] $ 304,782 [27]
Non-Control/Non-Affiliate Investments | Preferred Equity | Aerospace and Defense    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 3.50% [1],[2],[3],[4],[26] 5.60% [5],[6],[7],[9],[27]
Investments owned, fair value $ 22,905 [26] $ 37,594 [27]
Non-Control/Non-Affiliate Investments | Preferred Equity | Buildings and Real Estate    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 4.10% [1],[2],[3],[4],[26] 4.60% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Preferred Equity | Chemicals, Plastics, and Rubber    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 1.40% [1],[2],[3],[4],[26] 1.10% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Preferred Equity | Diversified/Conglomerate Services    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 3.80% [1],[2],[3],[4],[26] 3.50% [5],[6],[7],[9],[27]
Investments owned, fair value $ 24,318 [26] $ 22,953 [27]
Non-Control/Non-Affiliate Investments | Preferred Equity | Healthcare, Education, and Childcare    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 1.80% [1],[2],[3],[4],[26] 1.70% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Preferred Equity | Home and Office Furnishings, Housewares, and Durable Consumer Products    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 10.20% [1],[2],[3],[4],[26] 9.30% [5],[6],[7],[9],[27]
Investments owned, fair value $ 66,019 [26] $ 62,073 [27]
Non-Control/Non-Affiliate Investments | Preferred Equity | Leisure, Amusement, Motion Pictures, and Entertainment    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 10.80% [1],[2],[3],[4],[26] 9.90% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Preferred Equity | Oil and Gas    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 9.90% [1],[2],[3],[4],[26] 9.90% [5],[6],[7],[9],[27]
Investments owned, fair value $ 64,010 [26] $ 66,065 [27]
Non-Control/Non-Affiliate Investments | Preferred Equity | Printing and Publishing    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.00% [1],[2],[3],[4],[26] 0.00% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Common Equity/ Equivalents    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 27.90% [1],[2],[3],[4],[26] 31.00% [5],[6],[7],[9],[27]
Investments owned, fair value $ 180,145 [26] $ 207,495 [27]
Non-Control/Non-Affiliate Investments | Common Equity/ Equivalents | Aerospace and Defense    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 2.00% [1],[2],[3],[4],[26] 0.50% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Common Equity/ Equivalents | Diversified/Conglomerate Manufacturing    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.00% [1],[2],[3],[4],[26] 0.00% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Common Equity/ Equivalents | Home and Office Furnishings, Housewares, and Durable Consumer Products    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.00% [1],[2],[3],[4],[26] 0.00% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Common Equity/ Equivalents | Cargo Transport    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.00% [1],[2],[3],[4],[26] 0.00% [5],[6],[7],[9],[27]
Non-Control/Non-Affiliate Investments | Common Equity/ Equivalents | Machinery (Non-Agriculture, Non-Construction, and Non-Electronic)    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 25.90% [1],[2],[3],[4],[26] 30.50% [5],[6],[7],[9],[27]
Affiliate Investments    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 52.20% [1],[2],[3],[4],[28] 48.60% [5],[6],[7],[9],[29]
Investments owned, fair value $ 337,352 [28] $ 324,676 [29]
Affiliate Investments | Secured First Lien Debt    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 30.10% [1],[2],[3],[4],[28] 29.40% [5],[6],[7],[9],[29]
Investments owned, fair value $ 195,221 [28] $ 195,704 [29]
Affiliate Investments | Secured First Lien Debt | Diversified/Conglomerate Services    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 10.90% [1],[2],[3],[4],[28] 10.60% [5],[6],[7],[9],[29]
Investments owned, fair value $ 70,560 [28] $ 70,560 [29]
Affiliate Investments | Secured First Lien Debt | Home and Office Furnishings, Housewares, and Durable Consumer Products    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 5.90% [1],[2],[3],[4],[28] 5.70% [5],[6],[7],[9],[29]
Affiliate Investments | Secured First Lien Debt | Leisure, Amusement, Motion Pictures, and Entertainment    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 3.10% [1],[2],[3],[4],[28] 3.00% [5],[6],[7],[9],[29]
Affiliate Investments | Secured First Lien Debt | Electronics    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 7.40% [1],[2],[3],[4],[28] 7.20% [5],[6],[7],[9],[17],[29]
Affiliate Investments | Secured First Lien Debt | Mining, Steel, Iron and Non-Precious Metals    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 1.70% [1],[2],[3],[4],[28] 1.60% [5],[6],[7],[9],[29]
Affiliate Investments | Secured First Lien Debt | Telecommunications    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 1.10% [1],[2],[3],[4],[28] 1.30% [5],[6],[7],[9],[29]
Investments owned, fair value $ 7,459 [28] $ 7,942 [29]
Affiliate Investments | Secured Second Lien Debt    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.40% [1],[2],[3],[4],[28] 0.30% [5],[6],[7],[9],[29]
Investments owned, fair value $ 2,400 [28] $ 1,800 [29]
Affiliate Investments | Secured Second Lien Debt | Chemicals, Plastics, and Rubber    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.40% [1],[2],[3],[4],[28] 0.30% [5],[6],[7],[9],[29]
Investments owned, fair value $ 2,400 [28] $ 1,800
Affiliate Investments | Preferred Equity    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 20.90% [1],[2],[3],[4],[28] 18.20% [5],[6],[7],[9],[29]
Investments owned, fair value $ 134,786 [28] $ 122,167 [29]
Affiliate Investments | Preferred Equity | Chemicals, Plastics, and Rubber    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.90% [1],[2],[3],[4],[28] 0.70% [5],[6],[7],[9],[29]
Affiliate Investments | Preferred Equity | Diversified/Conglomerate Services    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 7.50% [1],[2],[3],[4],[28] 6.60% [5],[6],[7],[9],[29]
Investments owned, fair value $ 48,619 [28] $ 44,320 [29]
Affiliate Investments | Preferred Equity | Home and Office Furnishings, Housewares, and Durable Consumer Products    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 5.00% [1],[2],[3],[4],[28] 4.40% [5],[6],[7],[9],[29]
Affiliate Investments | Preferred Equity | Leisure, Amusement, Motion Pictures, and Entertainment    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.60% [1],[2],[3],[4],[28] 0.30% [5],[6],[7],[9],[29]
Affiliate Investments | Preferred Equity | Electronics    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 2.30% [1],[2],[3],[4],[28] 2.20% [5],[6],[7],[9],[29]
Affiliate Investments | Preferred Equity | Mining, Steel, Iron and Non-Precious Metals    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 4.60% [1],[2],[3],[4],[28] 4.00% [5],[6],[7],[9],[29]
Affiliate Investments | Preferred Equity | Telecommunications    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.00% [1],[2],[3],[4],[28] 0.00% [5],[6],[7],[9],[29]
Affiliate Investments | Common Equity/ Equivalents    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.80% [1],[2],[3],[4],[28] 0.70% [5],[6],[7],[9],[29]
Investments owned, fair value $ 4,945 [28] $ 5,005 [29]
Affiliate Investments | Common Equity/ Equivalents | Telecommunications    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.00% [1],[2],[3],[4],[28] 0.00% [5],[6],[7],[9],[29]
Affiliate Investments | Common Equity/ Equivalents | Finance    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.80% [1],[2],[3],[4],[28] 0.70% [5],[6],[7],[9],[29]
Control Investments    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.10% [1],[2],[3],[4],[30] 0.10% [5],[6],[7],[9],[31]
Investments owned, fair value $ 504 [30] $ 613 [31]
Control Investments | Secured First Lien Debt    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.10% [1],[2],[3],[4],[30] 0.10% [5],[6],[7],[9],[31]
Investments owned, fair value $ 504 [30] $ 613 [31]
Control Investments | Secured First Lien Debt | Diversified/Conglomerate Manufacturing    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.10% [1],[2],[3],[4],[30] 0.10% [5],[6],[7],[9],[31]
Control Investments | Preferred Equity    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets [5],[6],[7],[9],[31]   0.00%
Investments owned, fair value $ 0 [30] $ 0 [31]
Control Investments | Preferred Equity | Diversified/Conglomerate Manufacturing    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 0.00% [1],[2],[3],[4],[30] 0.00% [5],[6],[7],[9],[31]
[1] Category percentages represent the fair value of each category and subcategory as a percentage of net assets as of June 30, 2026.
[2] Certain of the securities listed are issued by affiliate(s) of the indicated portfolio company. The majority of the securities listed, totaling $1.1 billion at fair value, are pledged as collateral to our revolving line of credit, as described further in Note 5 — Borrowings in the accompanying Notes to Consolidated Financial Statements. Additionally, under Section 55 of the Investment Company Act of 1940, as amended (the "1940 Act"), we may not acquire any non-qualifying assets unless, at the time such acquisition is made, qualifying assets represent at least 70% of our total assets. As of June 30, 2026, our investments in Pyrotek Special Effects, Inc. ("Pyrotek") and Gladstone Alternative Income Fund ("Gladstone Alternative") are considered non-qualifying assets under Section 55 of the 1940 Act. Such non-qualifying assets represent 2.2% of total investments, at fair value, as of June 30, 2026.
[3] Unless indicated otherwise, all cash interest rates are indexed to 30-day Secured Overnight Financing Rate ("SOFR"), which was 3.7% as of June 30, 2026. If applicable, paid-in-kind interest rates are noted separately from the cash interest rate. Certain securities are subject to an interest rate floor. The cash interest rate is the greater of the floor or the reference rate plus a spread. Due dates represent the contractual maturity date.
[4] Unless indicated otherwise, all of our investments are valued using Level 3 inputs within the Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 820, "Fair Value Measurement" ("ASC 820") fair value hierarchy. Refer to Note 3 — Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[5] Unless indicated otherwise, all cash interest rates are indexed to 30-day SOFR, which was 3.7% as of March 31, 2026. If applicable, paid-in-kind interest rates are noted separately from the cash interest rate. Certain securities are subject to an interest rate floor. The cash interest rate is the greater of the floor or the reference rate plus a spread. Due dates represent the contractual maturity date.
[6] Category percentages represent the fair value of each category and subcategory as a percentage of net assets as of March 31, 2026.
[7] Certain of the securities listed are issued by affiliate(s) of the indicated portfolio company. The majority of the securities listed, totaling $1.2 billion at fair value, are pledged as collateral to our revolving line of credit, as described further in Note 5 — Borrowings in the accompanying Notes to Consolidated Financial Statements. Additionally, under Section 55 of the 1940 Act, we may not acquire any non-qualifying assets unless, at the time such acquisition is made, qualifying assets represent at least 70% of our total assets. As of March 31, 2026, our investments in Pyrotek and Gladstone Alternative are considered non-qualifying assets under Section 55 of the 1940 Act. Such non-qualifying assets represent 2.1% of total investments, at fair value, as of March 31, 2026.
[8] Cumulative gross unrealized appreciation for federal income tax purposes is $428.5 million; cumulative gross unrealized depreciation for federal income tax purposes is $173.7 million. Cumulative net unrealized appreciation is $254.8 million, based on a tax cost of $1.1 billion.
[9] Unless indicated otherwise, all of our investments are valued using Level 3 inputs within the ASC 820 fair value hierarchy. Refer to Note 3 —Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[10] One or more of our affiliated funds, Gladstone Capital Corporation and Gladstone Alternative, co-invested with us in this portfolio company pursuant to an exemptive order granted by the U.S. Securities and Exchange Commission.
[11] Fair value was based on the total enterprise value of the portfolio company, which is generally allocated to the portfolio company’s securities in order of their relative priority in the capital structure. Refer to Note 3 — Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[12] Security is non-income producing
[13] Security is non-income producing.
[14] Fair value was based on the total enterprise value of the portfolio company, which is generally allocated to the portfolio company’s securities in order of their relative priority in the capital structure. Refer to Note 3 — Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[15] Debt security is on non-accrual status.
[16] Debt security is on non-accrual status.
[17] One or more of our affiliated funds, Gladstone Capital Corporation and Gladstone Alternative, co-invested with us in this portfolio company pursuant to an exemptive order granted by the U.S. Securities and Exchange Commission.
[18] The portfolio company changed its name from Ricardo Defense, Inc. to Detroit Defense, Inc. during the year ended March 31, 2026.
[19] Valued using Level 1 inputs within the FASB ASC 820 fair value hierarchy. Refer to Note 3 — Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[20] Valued using Level 1 inputs within the FASB ASC 820 fair value hierarchy. Refer to Note 3 — Investments in the accompanying Notes to Consolidated Financial Statements for additional information.
[21] Fair value was based on net asset value provided by the underlying fund as a practical expedient.
[22] Fair value was based on net asset value provided by the underlying fund as a practical expedient.
[23] This portfolio company is headquartered in Ontario, Canada.
[24] This portfolio company is headquartered in Ontario, Canada.
[25] Fair value was based on the expected exit.
[26] Non-Control/Non-Affiliate investments, as defined by the 1940 Act, are those that are neither Control nor Affiliate investments and in which we own less than 5.0% of the issued and outstanding voting securities.
[27] Non-Control/Non-Affiliate investments, as defined by the 1940 Act, are those that are neither Control nor Affiliate investments and in which we own less than 5.0% of the issued and outstanding voting securities.
[28] Affiliate investments, as defined by the 1940 Act, are those that are not Control investments and in which we own, with the power to vote, between and inclusive of 5.0% and 25.0% of the issued and outstanding voting securities.
[29] Affiliate investments, as defined by the 1940 Act, are those that are not Control investments and in which we own, with the power to vote, between and inclusive of 5.0% and 25.0% of the issued and outstanding voting securities.
[30] Control investments, as defined by the 1940 Act, are those where we have the power to exercise a controlling influence over the management or policies of the portfolio company, which may include owning, with the power to vote, more than 25.0% of the issued and outstanding voting securities.
[31] Control investments, as defined by the 1940 Act, are those where we have the power to exercise a controlling influence over the management or policies of the portfolio company, which may include owning, with the power to vote, more than 25.0% of the issued and outstanding voting securities.