v3.25.2
Consolidated Schedule of Investments (Parenthetical) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Percentage representing senior secured loans in investments owned   112.50%
Percentage representing net assets in investments owned 100.00% 100.00%
Percentage representing total investments and cash equivalents 250.30% 242.00%
Percentage liabilities in excess of other assets (150.30%) (142.00%)
Percentage of outstanding voting securities of the investment 25.00% 25.00%
Percentage of non-qualifying assets in the portfolio of total assets 26.90% 26.30%
Tax Basis of Investments, Unrealized Appreciation (Depreciation), Net $ 8,255 $ 7,625
Tax Basis of Investments, Gross, Unrealized Appreciation 124,489 109,461
Tax Basis of Investments, Gross, Unrealized Depreciation 116,234 101,836
Investment Owned tax costs 2,126,683 1,998,009
Investment Company Change in Net Assets    
Beginning balance [1] 2,005,634  
Ending balance $ 2,134,938 [2] $ 2,005,634 [1]
US Treasury Bill [Member]    
Percentage representing investments on securities 4.03% 4.24%
Cash Equivalents [Member]    
Cash equivalents, percent of net assets 35.20% 40.00%
Senior Secured Loans [Member]    
Percentage representing net assets in investments owned [2] 127.80%  
Investment Company Change in Net Assets    
Beginning balance $ 1,117,118  
Ending balance $ 1,268,904 $ 1,117,118
Equipment Financing [Member]    
Percentage representing net assets in investments owned 14.00% 18.20%
Investment Company Change in Net Assets    
Beginning balance $ 181,016  
Ending balance $ 138,988 $ 181,016
Preferred Equity [Member]    
Percentage representing net assets in investments owned 3.30% 3.20%
Investment Company Change in Net Assets    
Beginning balance $ 31,682  
Ending balance $ 32,510 $ 31,682
Common Equity/Equity Interests/Warrants [Member]    
Percentage representing net assets in investments owned 70.00% 68.10%
Investment Company Change in Net Assets    
Beginning balance $ 675,818  
Ending balance $ 694,536 $ 675,818
Securities Investment [Member]    
Percentage representing net assets in investments owned 215.10% [2] 202.00% [1]
Spread One [Member]    
Investment interest rate, Paid in kind 2.75% 4.75%
Debt instrument variable interest rate spread 475.00% 200.00%
Spread Two [Member]    
Investment interest rate, Paid in kind 4.75%  
Debt instrument variable interest rate spread 200.00% 795.00%
Spread Three [Member]    
Debt instrument variable interest rate spread 795.00% 425.00%
Spread Four [Member]    
Debt instrument variable interest rate spread 425.00% 400.00%
Spread Five [Member]    
Debt instrument variable interest rate spread 400.00% 650.00%
Spread Six [Member]    
Investment interest rate, Paid in kind   5.00%
Debt instrument variable interest rate spread 650.00% 700.00%
Investment, interest rate, paid in cash   2.00%
Spread Seven [Member]    
Investment interest rate, Paid in kind 5.00% 1.00%
Debt instrument variable interest rate spread 700.00% 600.00%
Investment, interest rate, paid in cash 2.00%  
Spread Eight [Member]    
Investment interest rate, Paid in kind 1.00%  
Debt instrument variable interest rate spread 600.00% 550.00%
Spread Nine [Member]    
Investment interest rate, Paid in kind 0.50%  
Debt instrument variable interest rate spread 600.00% 650.00%
SLR Senior Lending Program LLC [Member]    
Investment Company Change in Net Assets    
Beginning balance [3] $ 178,740  
Ending balance $ 184,110 [4] $ 178,740 [3]
Kaseya Inc [Member]    
Investment interest rate, Paid in kind   2.50%
ASC Holdco LLC [Member]    
Investment Company Percentage of Holding 5.70% 5.70%
Companies more than 25% owned [Member]    
Investment Company Change in Net Assets    
Beginning balance $ 888,232 $ 839,074
Gross Additions 84,014 69,886
Gross Reductions 78,359 23,346
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 3,954 2,731
Ending balance 897,873 888,232
Interest/ Dividend/ Other Income 42,232 66,511
Companies more than 25% owned [Member] | Equipment Operating Leases LLC [Member]    
Investment Company Change in Net Assets    
Beginning balance 2,812 3,296
Gross Additions 0 0
Gross Reductions 2,884 496
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 72 12
Ending balance 0 2,812
Interest/ Dividend/ Other Income 104 264
Companies more than 25% owned [Member] | Kingsbridge Holdings, LLC [Member]    
Investment Company Change in Net Assets    
Beginning balance 100,500 96,000
Gross Additions 0 4,500
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) (32) 113
Ending balance 100,500 100,500
Interest/ Dividend/ Other Income 5,823 11,972
Companies more than 25% owned [Member] | BH Topco LLC (Kingsbridge) [Member]    
Investment Company Change in Net Assets    
Beginning balance 152,071 142,000
Gross Additions 4,514 4,323
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 11,915 5,748
Ending balance 168,500 152,071
Interest/ Dividend/ Other Income 10,116 12,159
Companies more than 25% owned [Member] | Loyer Capital LLC [Member]    
Investment Company Change in Net Assets    
Beginning balance 7,361 7,361
Gross Additions 0 0
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 0 0
Ending balance 7,361 7,361
Interest/ Dividend/ Other Income 374 757
Companies more than 25% owned [Member] | RD Holdco Inc Common Equity [Member]    
Investment Company Change in Net Assets    
Beginning balance 0 0
Gross Additions 0 0
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 0 0
Ending balance 0 0
Interest/ Dividend/ Other Income 0 0
Companies more than 25% owned [Member] | RD Holdco Inc Class B [Member]    
Investment Company Change in Net Assets    
Beginning balance 0 0
Gross Additions 0 0
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 0 0
Ending balance 0 0
Interest/ Dividend/ Other Income 0 0
Companies more than 25% owned [Member] | RD Holdco Inc Debt [Member]    
Investment Company Change in Net Assets    
Beginning balance 7,827 7,827
Gross Additions 0 0
Gross Reductions 2,025 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 0 (0)
Ending balance 5,802 7,827
Interest/ Dividend/ Other Income 0 0
Companies more than 25% owned [Member] | SLR Business Credit [Member]    
Investment Company Change in Net Assets    
Beginning balance 125,370 90,370
Gross Additions 0 30,000
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 4,000 5,000
Ending balance 129,370 125,370
Interest/ Dividend/ Other Income 7,700 8,350
Companies more than 25% owned [Member] | SLR Business Credit revolver [Member]    
Investment Company Change in Net Assets    
Beginning balance 0 0
Gross Additions 11,500 19,000
Gross Reductions 11,500 19,000
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 0 0
Ending balance 0 0
Interest/ Dividend/ Other Income 6 33
Companies more than 25% owned [Member] | SLR Credit Solutions [Member]    
Investment Company Change in Net Assets    
Beginning balance 288,250 284,000
Gross Additions 0 0
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 4,250
Ending balance 288,250 288,250
Interest/ Dividend/ Other Income 11,900 20,500
Companies more than 25% owned [Member] | SLR Equipment Finance Equity [Member]    
Investment Company Change in Net Assets    
Beginning balance 107,600 120,820
Gross Additions 0 0
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) (10,600) (13,220)
Ending balance 97,000 107,600
Interest/ Dividend/ Other Income 0 0
Companies more than 25% owned [Member] | SLR Equipment Finance Debt [Member]    
Investment Company Change in Net Assets    
Beginning balance 3,000 3,850
Gross Additions 7,600 3,000
Gross Reductions 5,750 3,850
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 0 0
Ending balance 4,850 3,000
Interest/ Dividend/ Other Income 92 28
Companies more than 25% owned [Member] | SLR Healthcare ABL [Member]    
Investment Company Change in Net Assets    
Beginning balance 37,850 35,850
Gross Additions 0 0
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) (350) 2,000
Ending balance 37,500 37,850
Interest/ Dividend/ Other Income 3,130 5,123
Companies more than 25% owned [Member] | SLR Healthcare ABL revolver [Member]    
Investment Company Change in Net Assets    
Beginning balance 4,000 0
Gross Additions 60,400 4,000
Gross Reductions 56,200 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 0 0
Ending balance 8,200 4,000
Interest/ Dividend/ Other Income 23 1
Companies more than 25% owned [Member] | SLR Senior Lending Program LLC [Member]    
Investment Company Change in Net Assets    
Beginning balance 49,091 43,899
Gross Additions 0 5,000
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) (551) 192
Ending balance 48,540 49,091
Interest/ Dividend/ Other Income 2,964 7,262
Companies more than 25% owned [Member] | SOINT LLC [Member]    
Investment Company Change in Net Assets    
Beginning balance 2,500 3,801
Gross Additions 0 63
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) (500) (1,364)
Ending balance 2,000 2,500
Interest/ Dividend/ Other Income 0 62
Companies more than 5% Less Than 25% owned [Member]    
Investment Company Change in Net Assets    
Beginning balance 89,945 44,250
Gross Additions 2,757 43,535
Gross Reductions 90 136
Net realized gain (loss) 0  
Change in unrealized gain (loss) (1,944) 2,105
Ending balance 91,015 89,945
Interest/ Dividend/ Other Income 4,023 4,726
Companies more than 5% Less Than 25% owned [Member] | Vapotherm, Inc. [Member]    
Investment Company Change in Net Assets    
Beginning balance 14,254 0
Gross Additions 0 14,080
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) (16) 108
Ending balance 14,357 14,254
Interest/ Dividend/ Other Income 846 488
Companies more than 5% Less Than 25% owned [Member] | Bayside Opco L L C One [Member]    
Investment Company Change in Net Assets    
Beginning balance 19,905 19,415
Gross Additions 0 626
Gross Reductions 90 136
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 0 0
Ending balance 19,815 19,905
Interest/ Dividend/ Other Income 1,176 2,543
Companies more than 5% Less Than 25% owned [Member] | Bayside Parent Llc Loan [Member]    
Investment Company Change in Net Assets    
Beginning balance 6,008 5,153
Gross Additions 445 855
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 0 0
Ending balance 6,453 6,008
Interest/ Dividend/ Other Income 445 850
Companies more than 5% Less Than 25% owned [Member] | Bayside Parent Llc Equity [Member]    
Investment Company Change in Net Assets    
Beginning balance 7,179 3,815
Gross Additions 0 0
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 2,062 3,364
Ending balance 9,241 7,179
Interest/ Dividend/ Other Income 0 0
Companies more than 5% Less Than 25% owned [Member] | SLR-AMI Topco Blocker, LLC [Member]    
Investment Company Change in Net Assets    
Beginning balance 12,778 15,867
Gross Additions 984 0
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) (3,762) (3,089)
Ending balance 10,000 12,778
Interest/ Dividend/ Other Income 0 0
Companies more than 5% Less Than 25% owned [Member] | Veronica Holdings, LLC (preferred equity) [Member]    
Investment Company Change in Net Assets    
Beginning balance 29,182 0
Gross Additions 1,328 27,644
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) (228) 1,413
Ending balance 30,510 29,182
Interest/ Dividend/ Other Income 1,556 845
Companies more than 5% Less Than 25% owned [Member] | Veronica Holdings, LLC (common equity) [Member]    
Investment Company Change in Net Assets    
Beginning balance 639 0
Gross Additions 0 330
Gross Reductions 0 0
Net realized gain (loss) 0 0
Change in unrealized gain (loss) 0 309
Ending balance 639 639
Interest/ Dividend/ Other Income $ 0 $ 0
[1] Aggregate net unrealized appreciation for U.S. federal income tax purposes is $7,625; aggregate gross unrealized appreciation and depreciation for U.S. federal tax purposes is $109,461 and $101,836, respectively, based on a tax cost of $1,998,009. Unless otherwise noted, all of the Company’s investments are pledged as collateral against the borrowings outstanding on the senior secured credit facility. The Company generally acquires its investments in private transactions exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”). These investments are generally subject to certain limitations on resale, and may be deemed to be “restricted securities” under the Securities Act. All investments are Level 3 unless otherwise indicated.
[2] Aggregate net unrealized appreciation for U.S. federal income tax purposes is $8,255; aggregate gross unrealized appreciation and depreciation for U.S. federal tax purposes is $124,489 and $116,234, respectively, based on a tax cost of $2,126,683. Unless otherwise noted, all of the Company’s investments are pledged as collateral against the borrowings outstanding on the senior secured credit facility. The Company generally acquires its investments in private transactions exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”). These investments are generally subject to certain limitations on resale, and may be deemed to be “restricted securities” under the Securities Act. All investments are Level 3 unless otherwise indicated.
[3] Represents the fair value in accordance with ASC Topic 820. The determination of such fair value is not included in the Board’s valuation process described elsewhere herein.
[4] Represents the fair value in accordance with ASC Topic 820. The determination of such fair value is not included in the Board’s valuation process described elsewhere herein.