v3.26.3
CONSOLIDATED SCHEDULE OF INVESTMENTS - CY - USD ($)
 9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Dec. 31, 2024
Cost $ 10,294,764,000 $ 2,988,655,000  
Fair value $ 10,566,935,000 $ 3,120,386,000  
% of Net Assets 136.77% 148.98%  
Interest rate swap      
Derivative, notional amount $ 1,480,666,000 $ 632,406,000  
Fair Value 79,872,000 3,084,000  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 79,872,000 $ 3,084,000  
Open Swap Contract, Identifier [Axis]: Interest rate swap | BNP Paribas | Aspen Credit Agreement 1      
Fund Pays 4.058% 4.058%  
Derivative, notional amount $ 18,750,000 $ 18,750,000  
Fair Value 1,538,000    
Fair Value   (169,000)  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 1,538,000    
Unrealized Appreciation/(Depreciation)   $ (169,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | BNP Paribas | Aspen Credit Agreement 2      
Fund Pays 3.757% 3.757%  
Derivative, notional amount $ 65,425,000 $ 65,430,000  
Fair Value 3,815,000    
Fair Value   (346,000)  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 3,815,000    
Unrealized Appreciation/(Depreciation)   $ (346,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | BNP Paribas | Aspen Credit Agreement 3      
Fund Pays 4.926%    
Derivative, notional amount $ 85,986,000    
Fair Value (788,000)    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ (788,000)    
Open Swap Contract, Identifier [Axis]: Interest rate swap | BNP Paribas | Aspen Credit Agreement 4      
Fund Pays 4.816%    
Derivative, notional amount $ 85,985,000    
Fair Value (153,000)    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ (153,000)    
Open Swap Contract, Identifier [Axis]: Interest rate swap | BNP Paribas | Denali Credit Agreement      
Fund Pays 2.525% 2.525%  
Derivative, notional amount $ 39,180,000 $ 40,132,000  
Fair Value 5,989,000 3,756,000  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 5,989,000 $ 3,756,000  
Open Swap Contract, Identifier [Axis]: Interest rate swap | Bank of China Limited New York Branch | Denali Credit Agreement      
Fund Pays 4.194% 4.194%  
Derivative, notional amount $ 12,664,000 $ 12,972,000  
Fair Value 456,000    
Fair Value   (441,000)  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 456,000    
Unrealized Appreciation/(Depreciation)   $ (441,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | Bayerische Landesbank | Denali Credit Agreement      
Fund Pays 4.194% 4.194%  
Derivative, notional amount $ 14,882,000 $ 15,244,000  
Fair Value 535,000    
Fair Value   (519,000)  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 535,000    
Unrealized Appreciation/(Depreciation)   $ (519,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | Bayerische Landesbank | Pioneer Credit Agreement      
Fund Pays 4.225%    
Derivative, notional amount $ 25,640,000    
Fair Value 1,487,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 1,487,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | Bayerische Landesbank | Tango Credit Agreement 1      
Fund Pays 4.158%    
Derivative, notional amount $ 23,094,000    
Fair Value 1,759,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 1,759,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | Bayerische Landesbank | Tango Credit Agreement 2      
Fund Pays 3.913%    
Derivative, notional amount $ 18,750,000    
Fair Value 826,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 826,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | Canadian Imperial Bank of Commerce | Denali Credit Agreement      
Fund Pays 4.194% 4.194%  
Derivative, notional amount $ 11,905,000 $ 12,195,000  
Fair Value 429,000    
Fair Value   (415,000)  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 429,000    
Unrealized Appreciation/(Depreciation)   $ (415,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | Canadian Imperial Bank of Commerce | Tango Credit Agreement      
Fund Pays   4.158%  
Derivative, notional amount   $ 69,281,000  
Fair Value   (1,323,000)  
Upfront Payments/Receipts   0  
Unrealized Appreciation/(Depreciation)   $ (1,323,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | Canadian Imperial Bank of Commerce | Tango Credit Agreement 1      
Fund Pays 4.158%    
Derivative, notional amount $ 23,094,000    
Fair Value 1,756,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 1,756,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | Canadian Imperial Bank of Commerce | Tango Credit Agreement 2      
Fund Pays 3.913%    
Derivative, notional amount $ 18,750,000    
Fair Value 823,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 823,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | Lloyds Bank Corporate Markets plc | Pioneer Credit Agreement      
Fund Pays 4.226%    
Derivative, notional amount $ 25,640,000    
Fair Value 1,480,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 1,480,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | MUFG Bank, Ltd. | Aspen Credit Agreement 1      
Fund Pays 4.059% 4.059%  
Derivative, notional amount $ 18,750,000 $ 18,750,000  
Fair Value 1,538,000    
Fair Value   (172,000)  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 1,538,000    
Unrealized Appreciation/(Depreciation)   $ (172,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | MUFG Bank, Ltd. | Aspen Credit Agreement 2      
Fund Pays 3.759% 3.759%  
Derivative, notional amount $ 65,425,000 $ 65,430,000  
Fair Value 3,816,000    
Fair Value   (357,000)  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 3,816,000    
Unrealized Appreciation/(Depreciation)   $ (357,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | MUFG Bank, Ltd. | Denali Credit Agreement      
Fund Pays 2.53% 2.53%  
Derivative, notional amount $ 39,180,000 $ 40,132,000  
Fair Value 5,983,000 3,743,000  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 5,983,000 $ 3,743,000  
Open Swap Contract, Identifier [Axis]: Interest rate swap | Morgan Stanley Bank, N.A. | Rover Credit Agreement      
Fund Pays 4.085%    
Derivative, notional amount $ 455,000,000    
Fair Value 16,590,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 16,590,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | NatWest Markets Plc | Denali Credit Agreement      
Fund Pays 4.194% 4.194%  
Derivative, notional amount $ 19,588,000 $ 20,064,000  
Fair Value 706,000    
Fair Value   (684,000)  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 706,000    
Unrealized Appreciation/(Depreciation)   $ (684,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | NatWest Markets Plc | Pioneer Credit Agreement      
Fund Pays 4.215%    
Derivative, notional amount $ 35,580,000    
Fair Value 2,098,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 2,098,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | NatWest Markets Plc | Tango Credit Agreement      
Fund Pays   4.158%  
Derivative, notional amount   $ 23,094,000  
Fair Value   (442,000)  
Upfront Payments/Receipts   0  
Unrealized Appreciation/(Depreciation)   $ (442,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | NatWest Markets Plc | Tango Credit Agreement 1      
Fund Pays 4.158%    
Derivative, notional amount $ 23,094,000    
Fair Value 1,758,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 1,758,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | NatWest Markets Plc | Tango Credit Agreement 2      
Fund Pays 3.913%    
Derivative, notional amount $ 18,750,000    
Fair Value 825,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 825,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | Natixis Bank, New York Branch | Pioneer Credit Agreement      
Fund Pays 3.884% 3.884%  
Derivative, notional amount $ 84,750,000 $ 84,750,000  
Fair Value 8,387,000 884,000  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 8,387,000 $ 884,000  
Open Swap Contract, Identifier [Axis]: Interest rate swap | Oversea-Chinese Banking Corporation Limited | Pioneer Credit Agreement      
Fund Pays 4.226%    
Derivative, notional amount $ 25,640,000    
Fair Value 1,483,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 1,483,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | Oversea-Chinese Banking Corporation Limited | Tango Credit Agreement 1      
Fund Pays 3.913%    
Derivative, notional amount $ 18,750,000    
Fair Value 825,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 825,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | Oversea-Chinese Banking Corporation Limited | Tango Credit Agreement 2      
Fund Pays 4.158%    
Derivative, notional amount $ 23,094,000    
Fair Value 1,758,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 1,758,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | PNC Bank, National Association | Denali Credit Agreement      
Fund Pays 4.194% 4.194%  
Derivative, notional amount $ 14,882,000 $ 15,244,000  
Fair Value 536,000    
Fair Value   (519,000)  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 536,000    
Unrealized Appreciation/(Depreciation)   $ (519,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | Societe Generale | Pioneer Credit Agreement      
Fund Pays 3.875% 3.875%  
Derivative, notional amount $ 84,750,000 $ 84,750,000  
Fair Value 8,451,000 975,000  
Upfront Payments/Receipts 0 0  
Unrealized Appreciation/(Depreciation) $ 8,451,000 $ 975,000  
Open Swap Contract, Identifier [Axis]: Interest rate swap | Societe Generale | Tango Credit Agreement      
Fund Pays   4.158%  
Derivative, notional amount   $ 23,094,000  
Fair Value   (443,000)  
Upfront Payments/Receipts   0  
Unrealized Appreciation/(Depreciation)   $ (443,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | Societe Generale | Tango Credit Agreement 1      
Fund Pays 4.158%    
Derivative, notional amount $ 23,094,000    
Fair Value 1,757,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 1,757,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | Societe Generale | Tango Credit Agreement 2      
Fund Pays 3.913%    
Derivative, notional amount $ 18,750,000    
Fair Value 824,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 824,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | Sumitomo Bank | Tango Credit Agreement      
Fund Pays   4.158%  
Derivative, notional amount   $ 23,094,000  
Fair Value   (444,000)  
Upfront Payments/Receipts   0  
Unrealized Appreciation/(Depreciation)   (444,000)  
Open Swap Contract, Identifier [Axis]: Interest rate swap | Sumitomo Bank | Tango Credit Agreement 1      
Fund Pays 4.158%    
Derivative, notional amount $ 23,094,000    
Fair Value 1,759,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) $ 1,759,000    
Open Swap Contract, Identifier [Axis]: Interest rate swap | Sumitomo Bank | Tango Credit Agreement 2      
Fund Pays 3.913%    
Derivative, notional amount $ 18,750,000    
Fair Value 826,000    
Upfront Payments/Receipts 0    
Unrealized Appreciation/(Depreciation) 826,000    
Non-controlled/non-affiliated investments      
Cost 9,356,531,000 2,750,308,000  
Fair value $ 9,612,947,000 $ 2,867,841,000  
% of Net Assets 124.42% 136.91%  
Investment, Affiliated Issuer      
Cost $ 938,233,000 $ 238,347,000  
Fair value $ 953,988,000 $ 252,545,000 $ 0
% of Net Assets 12.35% 12.07%  
Senior subordinated loans      
Cost $ 506,866,000 $ 90,449,000  
Fair value 510,064,000 89,618,000  
First lien senior secured loans      
Cost 2,007,895,000 597,964,000  
Fair value $ 2,015,358,000 $ 597,891,000  
% of Net Assets 26.08% 28.54%  
Equity investments | Non-controlled/non-affiliated investments      
Cost $ 7,348,636,000 $ 2,152,344,000  
Fair value $ 7,597,589,000 $ 2,269,950,000  
% of Net Assets 98.34% 108.37%  
Equity investments | Investment, Affiliated Issuer      
Cost $ 938,233,000 $ 238,347,000  
Fair value $ 953,988,000 $ 252,545,000  
% of Net Assets 12.35% 12.07%  
Other equity      
Cost $ 945,844,000 $ 340,995,000  
Fair value 987,596,000 354,399,000  
Preferred equity      
Cost 1,047,597,000 0  
Fair value 1,047,597,000 0  
Common equity      
Cost 6,293,428,000 2,049,696,000  
Fair value 6,516,384,000 2,168,096,000  
Money Markey Funds      
Cost 4,801,000 347,000  
Fair value $ 4,801,000 $ 347,000  
% of Net Assets 0.06% 0.02%  
Data centers | Corporate Bonds      
Cost $ 29,400,000    
Fair value $ 29,400,000    
% of Net Assets 0.38%    
Data centers | First Lien Senior Secured Loans      
Cost $ 370,491,000    
Fair value $ 377,230,000    
% of Net Assets 4.89%    
Data centers | Senior subordinated loans      
Cost $ 310,738,000    
Fair value $ 314,064,000    
% of Net Assets 4.06%    
Data centers | Common equity      
Cost $ 793,837,000    
Fair value $ 793,837,000    
% of Net Assets 10.28%    
Independent power and renewable electricity producers | Corporate Bonds      
Cost $ 5,964,000    
Fair value $ 5,822,000    
% of Net Assets 0.08%    
Independent power and renewable electricity producers | First Lien Senior Secured Loans      
Cost $ 156,397,000 $ 33,639,000  
Fair value $ 156,544,000 $ 33,742,000  
% of Net Assets 2.03% 1.61%  
Independent power and renewable electricity producers | Equity investments      
Cost $ 349,185,000    
Fair value $ 390,937,000    
% of Net Assets 5.06%    
Independent power and renewable electricity producers | Other equity      
Cost   $ 340,995,000  
Fair value   $ 354,399,000  
% of Net Assets   16.92%  
Independent power and renewable electricity producers | Common equity      
Cost $ 2,958,561,000 $ 1,811,349,000  
Fair value $ 3,188,289,000 $ 1,915,551,000  
% of Net Assets 41.27% 91.45%  
Oil, gas and consumable fuels | Corporate Bonds      
Cost $ 5,564,000    
Fair value $ 5,476,000    
% of Net Assets 0.07%    
Oil, gas and consumable fuels | First Lien Senior Secured Loans      
Cost $ 265,193,000 $ 137,227,000  
Fair value $ 264,952,000 $ 137,505,000  
% of Net Assets 3.43% 6.56%  
Oil, gas and consumable fuels | Senior subordinated loans      
Cost $ 196,128,000    
Fair value $ 196,000,000    
% of Net Assets 2.53%    
Oil, gas and consumable fuels | Preferred equity      
Cost $ 1,047,597,000    
Fair value $ 1,047,597,000    
% of Net Assets 13.56%    
Oil, gas and consumable fuels | Common equity      
Cost $ 1,602,797,000 $ 238,347,000  
Fair value 1,580,270,000 $ 252,545,000  
% of Net Assets   12.07%  
Energy equipment and services | Corporate Bonds      
Cost 18,871,000    
Fair value $ 18,424,000    
% of Net Assets 0.24%    
Energy equipment and services | First Lien Senior Secured Loans      
Cost $ 26,280,000    
Fair value $ 26,236,000    
% of Net Assets 0.34%    
Chemicals | First Lien Senior Secured Loans      
Cost $ 39,150,000 $ 7,500,000  
Fair value $ 39,147,000 $ 7,511,000  
% of Net Assets 0.51% 0.36%  
Diversified telecommunication services | First Lien Senior Secured Loans      
Cost $ 25,819,000    
Fair value $ 25,631,000    
% of Net Assets 0.33%    
Electric utilities | First Lien Senior Secured Loans      
Cost $ 311,117,000 $ 119,599,000  
Fair value $ 310,716,000 $ 119,996,000  
% of Net Assets 4.02% 5.73%  
Electrical equipment | First Lien Senior Secured Loans      
Cost $ 67,796,000 $ 6,178,000  
Fair value $ 67,609,000 $ 6,182,000  
% of Net Assets 0.88% 0.30%  
Construction and engineering | First Lien Senior Secured Loans      
Cost $ 10,841,000    
Fair value $ 10,795,000    
% of Net Assets 0.14%    
Commercial services and supplies | First Lien Senior Secured Loans      
Cost $ 48,220,000 $ 4,492,000  
Fair value $ 48,032,000 $ 4,500,000  
% of Net Assets 0.62% 0.21%  
IT services | First Lien Senior Secured Loans      
Cost $ 55,997,000    
Fair value $ 55,959,000    
% of Net Assets 0.72%    
Machinery | First Lien Senior Secured Loans      
Cost $ 18,843,000 $ 2,489,000  
Fair value $ 18,718,000 $ 2,494,000  
% of Net Assets 0.24% 0.12%  
Software | First Lien Senior Secured Loans      
Cost $ 14,617,000 $ 18,539,000  
Fair value $ 14,205,000 $ 18,473,000  
% of Net Assets 0.18% 0.88%  
Technology hardware and equipment | First Lien Senior Secured Loans      
Cost $ 30,469,000    
Fair value $ 30,398,000    
% of Net Assets 0.39%    
Transportation infrastructure | Equity investments      
Cost $ 596,659,000    
Fair value $ 596,659,000    
% of Net Assets 7.72%    
Transportation infrastructure | Other equity      
Cost $ 945,844,000    
Fair value $ 987,596,000    
% of Net Assets 12.78%    
Transportation infrastructure | Common equity      
Cost $ 691,674,000    
Fair value $ 692,076,000    
% of Net Assets 8.96%    
Data centers, Independent power and renewable electricity producers, Oil, gas and consumable fuels | Common equity      
Cost $ 5,355,195,000    
Fair value $ 5,562,396,000    
% of Net Assets 72.00%    
Oil, Gas and Consumable Fuels 1 | Common equity      
Cost $ 246,559,000    
Fair value $ 261,912,000    
% of Net Assets 3.39%    
Oil, Gas, Consumable Fuels And Transportation Infrastructure | Common equity      
Cost $ 938,233,000    
Fair value $ 953,988,000    
% of Net Assets 12.35%    
Investment, Identifier [Axis]: AEJV SPV LP Membership Interest | Affiliated Issuer      
Fair value $ 692,076,000 $ 0  
Investment, Identifier [Axis]: AEJV SPV LP Membership Interest, Common equity | Affiliated Issuer      
Cost [1],[2],[3],[4] 691,674,000    
Fair value [1],[2],[3],[4] $ 692,076,000    
Shares/ Units [1],[2],[3],[4] 736,437,719    
Investment, Identifier [Axis]: AI Aqua Merger Sub, Inc. | First lien senior secured loans      
Coupon [5] 6.21%    
Spread [5] 2.50%    
Principal $ 18,750,000    
Cost 18,843,000    
Fair value $ 18,718,000    
Investment, Identifier [Axis]: AI Aqua Merger Sub, Inc., First lien senior secured loans      
Coupon [6],[7]   6.85%  
Spread [6],[7]   3.00%  
Principal [6]   $ 2,490,000  
Cost [6]   2,489,000  
Fair value [6]   $ 2,494,000  
Investment, Identifier [Axis]: AL GCX Holdings, LLC | First lien senior secured loans      
Coupon [5] 6.01%    
Spread [5] 2.25%    
Principal $ 19,253,000    
Cost 19,241,000    
Fair value $ 19,244,000    
Investment, Identifier [Axis]: AL GCX Holdings, LLC, First lien senior secured loans      
Coupon [7]   5.98%  
Spread [7]   2.25%  
Principal   $ 12,000,000  
Cost   11,955,000  
Fair value   $ 12,008,000  
Investment, Identifier [Axis]: AL NGPL Holdings, LLC | First lien senior secured loans      
Coupon [5] 5.73%    
Spread [5] 2.00%    
Principal $ 2,700,000    
Cost 2,710,000    
Fair value $ 2,698,000    
Investment, Identifier [Axis]: Acrisure, LLC, First lien senior secured loans      
Coupon [7]   6.72%  
Spread [7]   3.00%  
Principal   $ 496,000  
Cost   490,000  
Fair value   $ 495,000  
Investment, Identifier [Axis]: Alpha Generation LLC | First lien senior secured loans 1      
Coupon [5] 5.65%    
Spread [5] 1.75%    
Principal $ 20,549,000    
Cost 20,530,000    
Fair value $ 20,390,000    
Investment, Identifier [Axis]: Alpha Generation LLC | First lien senior secured loans 2      
Coupon [5] 5.65%    
Spread [5] 1.75%    
Principal $ 15,137,000    
Cost 15,033,000    
Fair value 15,005,000    
Investment, Identifier [Axis]: Alpha Generation LLC, First lien senior secured loans      
Coupon [7]   5.72%  
Spread [7]   2.00%  
Principal   $ 10,258,000  
Cost   10,271,000  
Fair value   $ 10,285,000  
Investment, Identifier [Axis]: Applied Systems, Inc. , First lien senior secured loans      
Coupon [7]   6.17%  
Spread [7]   2.50%  
Principal   $ 2,538,000  
Cost   2,538,000  
Fair value   2,552,000  
Investment, Identifier [Axis]: Aspen Renewables Equity Holdings LLC | Common equity      
Cost [2],[3],[4] 432,982,000    
Fair value [2],[3],[4] $ 487,701,000    
Shares/ Units [2],[3],[4] 4,918    
Investment, Identifier [Axis]: Aspen Renewables Equity Holdings LLC, Common equity      
Cost [8],[9],[10]   431,267,000  
Fair value [8],[9],[10]   $ 479,667,000  
Shares/ Units [8],[9],[10]   4,900  
Investment, Identifier [Axis]: Astoria Energy LLC | First lien senior secured loans 1      
Coupon [5] 6.32%    
Spread [5] 2.25%    
Principal $ 20,423,000    
Cost 20,490,000    
Fair value $ 20,470,000    
Investment, Identifier [Axis]: Astoria Energy LLC | First lien senior secured loans 2      
Coupon [5] 6.15%    
Spread [5] 2.25%    
Principal $ 13,612,000    
Cost 13,656,000    
Fair value $ 13,643,000    
Investment, Identifier [Axis]: Astoria Energy LLC, First lien senior secured loans 1      
Coupon [7]   6.42%  
Spread [7]   2.75%  
Principal   $ 6,989,000  
Cost   6,992,000  
Fair value   $ 7,035,000  
Investment, Identifier [Axis]: Astoria Energy LLC, First lien senior secured loans 2      
Coupon [7]   6.47%  
Spread [7]   2.75%  
Principal   $ 2,121,000  
Cost   2,122,000  
Fair value   $ 2,135,000  
Investment, Identifier [Axis]: BCP Renaissance Parent L.L.C., First lien senior secured loans      
Coupon [7]   6.17%  
Spread [7]   2.50%  
Principal   $ 8,865,000  
Cost   8,882,000  
Fair value   $ 8,909,000  
Investment, Identifier [Axis]: Bayonne Energy Center, LLC | First lien senior secured loans      
Coupon [5] 6.75%    
Spread [5] 3.00%    
Principal $ 17,565,000    
Cost 17,592,000    
Fair value $ 17,620,000    
Investment, Identifier [Axis]: Bayonne Energy Center, LLC, First lien senior secured loans      
Coupon [7]   6.67%  
Spread [7]   3.00%  
Principal   $ 9,113,000  
Cost   9,134,000  
Fair value   $ 9,165,000  
Investment, Identifier [Axis]: Blackfin Pipeline LLC | First lien senior secured loans      
Coupon [5] 6.40%    
Spread [5] 2.50%    
Principal $ 7,471,000    
Cost 7,496,000    
Fair value $ 7,486,000    
Investment, Identifier [Axis]: Blackfin Pipeline LLC, First lien senior secured loans      
Coupon [7]   6.75%  
Spread [7]   3.00%  
Principal   $ 6,000,000  
Cost   5,999,000  
Fair value   $ 6,005,000  
Investment, Identifier [Axis]: Buckeye Partners LP | First lien senior secured loans      
Coupon [5] 5.65%    
Spread [5] 1.75%    
Principal $ 3,962,000    
Cost 3,968,000    
Fair value 3,959,000    
Investment, Identifier [Axis]: Buckeye Partners LP, First lien senior secured loans      
Coupon [7]   5.47%  
Spread [7]   1.75%  
Principal   $ 3,992,000  
Cost   3,999,000  
Fair value   4,011,000  
Investment, Identifier [Axis]: CMH01 Holdings LP | Delayed Draw Term Loan      
Principal $ 165,000,000 $ 125,000,000  
Investment, Identifier [Axis]: CMH01 Holdings LP | First lien senior secured loans      
Coupon [4],[5],[11] 8.17%    
Spread [4],[5],[11] 4.35%    
Principal [4],[11] $ 150,279,000    
Cost [4],[11] 146,561,000    
Fair value [4],[11] $ 150,279,000    
Investment, Identifier [Axis]: CMH01 Holdings LP, First lien senior secured loans      
Coupon [7],[10],[12]   8.03%  
Spread [7],[10],[12]   4.35%  
Principal [10],[12]   $ 80,929,000  
Cost [10],[12]   77,179,000  
Fair value [10],[12]   $ 77,179,000  
Investment, Identifier [Axis]: CPPIB OVM Member U.S. LLC | First lien senior secured loans      
Coupon [5] 6.32%    
Spread [5] 2.25%    
Principal $ 18,718,000    
Cost 18,765,000    
Fair value $ 18,756,000    
Investment, Identifier [Axis]: CPPIB OVM Member U.S. LLC, First lien senior secured loans      
Coupon [7]   6.17%  
Spread [7]   2.50%  
Principal   $ 2,282,000  
Cost   2,272,000  
Fair value   $ 2,295,000  
Investment, Identifier [Axis]: CPV Fairview, LLC | First lien senior secured loans      
Coupon [5] 6.57%    
Spread [5] 2.50%    
Principal $ 28,999,000    
Cost 29,047,000    
Fair value 29,063,000    
Investment, Identifier [Axis]: CPV Fairview, LLC, First lien senior secured loans      
Coupon [7]   6.17%  
Spread [7]   2.50%  
Principal   $ 6,000,000  
Cost   6,007,000  
Fair value   6,021,000  
Investment, Identifier [Axis]: CW Nest Property Owner LLC | Delayed Draw Term Loan      
Principal $ 100,000,000 $ 100,000,000  
Investment, Identifier [Axis]: CW Nest Property Owner LLC | First lien senior secured loans      
Coupon [4],[5],[11] 7.65%    
Spread [4],[5],[11] 3.75%    
Principal [4],[11] $ 82,888,000    
Cost [4],[11] 79,698,000    
Fair value [4],[11] $ 80,451,000    
Investment, Identifier [Axis]: CW Nest Property Owner LLC, First lien senior secured loans      
Coupon [7],[10],[12]   7.48%  
Spread [7],[10],[12]   3.75%  
Principal [10],[12]   $ 18,841,000  
Cost [10],[12]   14,591,000  
Fair value [10],[12]   $ 14,591,000  
Investment, Identifier [Axis]: Calpine Construction Finance Company, L.P. , First lien senior secured loans      
Coupon [7]   5.47%  
Spread [7]   1.75%  
Principal   $ 6,354,000  
Cost   6,351,000  
Fair value   $ 6,357,000  
Investment, Identifier [Axis]: Calpine Construction Finance Company, L.P. | First lien senior secured loans      
Coupon [5] 5.65%    
Spread [5] 1.75%    
Principal $ 6,354,000    
Cost 6,352,000    
Fair value $ 6,351,000    
Investment, Identifier [Axis]: Carroll County Energy LLC | First lien senior secured loans      
Coupon [5] 6.82%    
Spread [5] 2.75%    
Principal $ 24,473,000    
Cost 24,567,000    
Fair value $ 24,534,000    
Investment, Identifier [Axis]: Carroll County Energy LLC, First lien senior secured loans      
Coupon [7]   6.42%  
Spread [7]   2.75%  
Principal   $ 16,958,000  
Cost   16,995,000  
Fair value   $ 17,021,000  
Investment, Identifier [Axis]: Cloud Software Group, Inc. | First lien senior secured loans      
Coupon [5] 7.32%    
Spread [5] 3.25%    
Principal $ 3,699,000    
Cost 3,690,000    
Fair value $ 3,505,000    
Investment, Identifier [Axis]: Cloud Software Group, Inc., First lien snior secured loans      
Coupon [7]   6.92%  
Spread [7]   3.25%  
Principal   $ 3,985,000  
Cost   3,974,000  
Fair value   $ 3,988,000  
Investment, Identifier [Axis]: Cogentrix Finance Holdco I, LLC | First lien senior secured loans      
Coupon [5] 6.15%    
Spread [5] 2.25%    
Principal $ 12,637,000    
Cost 12,659,000    
Fair value $ 12,612,000    
Investment, Identifier [Axis]: Cogentrix Finance Holdco I, LLC, First lien senior secured loans      
Coupon [7]   5.97%  
Spread [7]   2.25%  
Principal   $ 11,623,000  
Cost   11,640,000  
Fair value   $ 11,684,000  
Investment, Identifier [Axis]: Colossus AcquireCo LLC | First lien senior secured loans      
Coupon [5] 5.82%    
Spread [5] 1.75%    
Principal $ 19,223,000    
Cost 19,161,000    
Fair value 19,117,000    
Investment, Identifier [Axis]: Colossus AcquireCo LLC, First lien senior secured loans      
Coupon [7]   5.41%  
Spread [7]   1.75%  
Principal   $ 10,548,000  
Cost   10,514,000  
Fair value   $ 10,535,000  
Investment, Identifier [Axis]: Commonwealth LNG Intermediate Parent, LLC | Preferred equity      
Cost [2],[3],[4] 1,047,597,000    
Fair value [2],[3],[4] $ 1,047,597,000    
Investment, Interest Rate, Paid in Kind [2],[3],[4],[5] 13.00%    
Shares/ Units [2],[3],[4] 1,000,000,000    
Investment, Identifier [Axis]: ConnectWise, LLC | First lien senior secured loans      
Coupon [5] 7.84%    
Spread [5] 3.76%    
Principal $ 3,935,000    
Cost 3,941,000    
Fair value $ 3,864,000    
Investment, Identifier [Axis]: ConnectWise, LLC, First lien senior secured loans      
Coupon [7]   7.43%  
Spread [7]   3.76%  
Principal   $ 4,974,000  
Cost   4,984,000  
Fair value   $ 4,878,000  
Investment, Identifier [Axis]: Coreweave Financing DDTL V, LLC | First lien senior secured loans      
Coupon [5],[13] 8.37%    
Spread [5],[13] 4.50%    
Principal [13] $ 31,542,000    
Cost [13] 31,970,000    
Fair value [13] 31,749,000    
Investment, Identifier [Axis]: Coreweave Financing DDTL V-V, LLC | Delayed Draw Term Loan      
Principal $ 40,071,000    
Investment, Identifier [Axis]: Coreweave Financing DDTL V-V, LLC | First lien senior secured loans      
Coupon [5],[11],[13] 9.26%    
Spread [5],[11],[13] 5.50%    
Principal [11],[13] $ 23,960,000    
Cost [11],[13] 24,027,000    
Fair value [11],[13] 24,210,000    
Investment, Identifier [Axis]: Cornerstone Generation, LLC, First lien senior secured loans      
Coupon [7]   7.09%  
Spread [7]   3.25%  
Principal   $ 8,738,000  
Cost   8,769,000  
Fair value   $ 8,807,000  
Investment, Identifier [Axis]: Corporate bonds      
Cost 59,799,000    
Fair value $ 59,122,000    
% of Net Assets 0.77%    
Investment, Identifier [Axis]: Covanta Holding Corporation | First lien senior secured loans      
Coupon [5] 6.15%    
Spread [5] 2.25%    
Principal $ 4,474,000    
Cost 4,466,000    
Fair value 4,467,000    
Investment, Identifier [Axis]: Covanta Holding Corporation, First lien senior secured loans      
Coupon [7]   5.98%  
Spread [7]   2.25%  
Principal   $ 4,500,000  
Cost   4,492,000  
Fair value   4,500,000  
Investment, Identifier [Axis]: Denali Equity Holdings LLC      
Fair value $ 8,551,600,000 $ 2,522,500,000  
% of Net Assets 110.69% 120.43%  
Investment, Identifier [Axis]: Denali Equity Holdings LLC | Other equity      
Cost [2],[3],[4] $ 317,124,000    
Fair value [2],[3],[4] $ 352,779,000    
Shares/ Units [2],[3],[4] 3,749    
Investment, Identifier [Axis]: Denali Equity Holdings LLC, Other equity      
Cost [8],[9],[10]   $ 340,995,000  
Fair value [8],[9],[10]   $ 354,399,000  
Shares/ Units [8],[9],[10]   3,749  
Investment, Identifier [Axis]: EFS Cogen Holdings I LLC, First lien senior secured loans      
Coupon [7]   6.67%  
Spread [7]   3.00%  
Principal   $ 4,136,000  
Cost   4,149,000  
Fair value   $ 4,165,000  
Investment, Identifier [Axis]: ELK Grove Village Property LLC | Corporate bonds      
Coupon [4],[5] 9.75%    
Principal [4] $ 30,000,000    
Cost [4] 29,400,000    
Fair value [4] $ 29,400,000    
Investment, Identifier [Axis]: EMG Utica Midstream Holdings, LLC | First lien senior secured loans      
Coupon [4],[5] 7.57%    
Spread [4],[5] 3.50%    
Principal [4] $ 5,500,000    
Cost [4] 5,500,000    
Fair value [4] 5,500,000    
Investment, Identifier [Axis]: ET Rover Pipeline LLC |Common equity      
Cost [2],[3],[4] 1,602,797,000    
Fair value [2],[3],[4] $ 1,580,270,000    
% of Net Assets 20.45%    
Shares/ Units [2],[3],[4] 1,625,000,000    
Investment, Identifier [Axis]: Ellucian Holdings Inc. | First lien senior secured loans      
Coupon [5] 6.40%    
Spread [5] 2.50%    
Principal $ 6,966,000    
Cost 6,986,000    
Fair value $ 6,836,000    
Investment, Identifier [Axis]: Ellucian Holdings Inc., First lien senior secured loans      
Coupon [7]   6.47%  
Spread [7]   2.75%  
Principal   $ 7,019,000  
Cost   7,043,000  
Fair value   7,055,000  
Investment, Identifier [Axis]: EnergySolutions, LLC | First lien senior secured loan      
Coupon [5] 6.51%    
Spread [5] 2.75%    
Principal $ 14,054,000    
Cost 14,120,000    
Fair value 14,049,000    
Investment, Identifier [Axis]: First American U.S. Treasury Sweep (Y Shares)      
Principal 4,755    
Cost 4,755,000    
Fair value $ 4,755,000    
Dividend Yield 3.40%    
Investment, Identifier [Axis]: First American U.S. Treasury Sweep (Y Shares) 1      
Principal $ 46 173,000  
Cost 46,000 173,000  
Fair value $ 46,000 $ 173,000  
Dividend Yield 3.40% 3.45%  
Investment, Identifier [Axis]: First American U.S. Treasury Sweep (Y Shares) 2      
Principal   $ 174,000  
Cost   174,000  
Fair value   $ 174,000  
Dividend Yield   3.46%  
Investment, Identifier [Axis]: First lien senior secured loans      
Cost $ 1,441,230,000 $ 507,515,000  
Fair value $ 1,446,172,000 $ 508,273,000  
% of Net Assets 18.72% 24.27%  
Investment, Identifier [Axis]: Freeport LNG Investments, LLLP | First lien senior secured loans      
Coupon [5] 6.73%    
Spread [5] 2.75%    
Principal $ 59,181,000    
Cost 59,299,000    
Fair value $ 59,390,000    
Investment, Identifier [Axis]: Freeport LNG investments, LLLP, First lien senior secured loans 1      
Coupon [7]   7.15%  
Spread [7]   3.26%  
Principal   $ 3,476,000  
Cost   3,465,000  
Fair value   $ 3,477,000  
Investment, Identifier [Axis]: Freeport LNG investments, LLLP, First lien senior secured loans 2      
Coupon [7]   7.12%  
Spread [7]   3.25%  
Principal   $ 8,161,000  
Cost   8,128,000  
Fair value   $ 8,185,000  
Investment, Identifier [Axis]: GIP Pilot Acquisition Partners, L.P. | First lien senior secured loans      
Coupon [5] 5.72%    
Spread [5] 2.00%    
Principal $ 11,981,000    
Cost 12,012,000    
Fair value 11,981,000    
Investment, Identifier [Axis]: GIP Pilot Acquisition Partners, L.P., First lien senior secured loans      
Coupon [7]   5.94%  
Spread [7]   2.00%  
Principal   $ 5,000,000  
Cost   5,013,000  
Fair value   5,005,000  
Investment, Identifier [Axis]: Galaxy Helios LLC | Delayed Draw Term Loan      
Principal $ 97,019,000 $ 100,000,000  
Investment, Identifier [Axis]: Galaxy Helios LLC | First lien senior secured loans      
Coupon [4],[5],[11] 8.65%    
Spread [4],[5],[11] 4.75%    
Principal [4],[11] $ 91,672,000    
Cost [4],[11] 88,976,000    
Fair value [4],[11] $ 91,180,000    
Investment, Identifier [Axis]: Galaxy Helios LLC, First lien senior secured loans      
Coupon [7],[10],[12]   8.43%  
Spread [7],[10],[12]   4.75%  
Principal [10],[12]   $ 62,713,000  
Cost [10],[12]   58,963,000  
Fair value [10],[12]   $ 58,963,000  
Investment, Identifier [Axis]: Hamilton Projects Acquiror, LLC | First lien senior secured loans      
Coupon [5] 6.40%    
Spread [5] 2.50%    
Principal $ 18,486,000    
Cost 18,569,000    
Fair value $ 18,522,000    
Investment, Identifier [Axis]: Hamilton Projects Acquiror, LLC, First lien senior secured loans      
Coupon [7]   6.22%  
Spread [7]   2.50%  
Principal   $ 5,333,000  
Cost   5,350,000  
Fair value   $ 5,363,000  
Investment, Identifier [Axis]: Hill Top Energy Center, LLC | First lien senior secured loans      
Coupon [5] 6.82%    
Spread [5] 2.75%    
Principal $ 54,077,000    
Cost 54,320,000    
Fair value $ 54,144,000    
Investment, Identifier [Axis]: Hill Top Energy Center, LLC, First lien senior secured loans      
Coupon [7]   6.92%  
Spread [7]   3.25%  
Principal   $ 11,842,000  
Cost   11,886,000  
Fair value   $ 11,945,000  
Investment, Identifier [Axis]: ITT Holdings LLC | Corporate bonds      
Coupon [5] 6.50%    
Principal $ 3,508,000    
Cost 3,482,000    
Fair value $ 3,436,000    
Investment, Identifier [Axis]: ITT Holdings LLC | First lien senior secured loans      
Coupon [5] 5.88%    
Spread [5] 1.98%    
Principal $ 12,972,000    
Cost 12,977,000    
Fair value $ 12,948,000    
Investment, Identifier [Axis]: ITT Holdings LLC, First lien senior secured loans      
Coupon [7]   6.19%  
Spread [7]   2.48%  
Principal   $ 1,739,000  
Cost   1,740,000  
Fair value   $ 1,748,000  
Investment, Identifier [Axis]: Independent power and renewable electricity producers | Corporate bonds      
Coupon [5],[13] 6.13%    
Principal [13] $ 6,000,000    
Cost [13] 5,964,000    
Fair value [13] $ 5,822,000    
Investment, Identifier [Axis]: Invenergy Thermal Operating I LLC | First lien senior secured loans      
Coupon [5] 6.62%    
Spread [5] 2.75%    
Principal $ 4,394,000    
Cost 4,405,000    
Fair value $ 4,409,000    
Investment, Identifier [Axis]: Invenergy Thermal Operating I LLC, First lien senior secured loans      
Coupon [7]   6.41%  
Spread [7]   2.75%  
Principal   $ 4,817,000  
Cost   4,830,000  
Fair value   $ 4,830,000  
Investment, Identifier [Axis]: Isotope FinCo S.a r.l. | First lien senior secured loan      
Coupon [4],[5],[13] 6.55%    
Spread [4],[5],[13] 2.50%    
Principal [4],[13] $ 6,000,000    
Cost [4],[13] 5,985,000    
Fair value [4],[13] $ 6,000,000    
Investment, Identifier [Axis]: Jackson Generation, LLC | First lien senior secured loans 1      
Coupon [5] 6.60%    
Spread [5] 2.50%    
Principal $ 47,500,000    
Cost 47,104,000    
Fair value $ 47,203,000    
Investment, Identifier [Axis]: Jackson Generation, LLC | First lien senior secured loans 2      
Coupon [5] 6.57%    
Spread [5] 2.50%    
Principal $ 5,500,000    
Cost 5,501,000    
Fair value $ 5,479,000    
Investment, Identifier [Axis]: Kodiak Gas Services, LLC | Corporate bonds 1      
Coupon [5],[13] 5.88%    
Principal [13] $ 6,500,000    
Cost [13] 6,395,000    
Fair value [13] $ 6,258,000    
Investment, Identifier [Axis]: Kodiak Gas Services, LLC | Corporate bonds 2      
Coupon [5],[13] 6.50%    
Principal [13] $ 5,500,000    
Cost [13] 5,473,000    
Fair value [13] $ 5,311,000    
Investment, Identifier [Axis]: Lackawanna Energy Center LLC | First lien senior secured loans      
Coupon [5] 6.54%    
Spread [5] 2.75%    
Principal $ 32,393,000    
Cost 32,455,000    
Fair value $ 32,535,000    
Investment, Identifier [Axis]: Lackawanna Energy Center LLC, First lien senior secured loans      
Coupon [7]   6.78%  
Spread [7]   3.00%  
Principal   $ 12,903,000  
Cost   12,943,000  
Fair value   $ 12,971,000  
Investment, Identifier [Axis]: Lightning Power, LLC | First lien senior secured loans      
Coupon [5],[13] 5.65%    
Spread [5],[13] 1.75%    
Principal [13] $ 5,869,000    
Cost [13] 5,886,000    
Fair value [13] $ 5,863,000    
Investment, Identifier [Axis]: Lightning Power, LLC, First lien senior secured loans      
Coupon [6],[7]   5.97%  
Spread [6],[7]   2.25%  
Principal [6]   $ 2,914,000  
Cost [6]   2,926,000  
Fair value [6]   $ 2,926,000  
Investment, Identifier [Axis]: M6 ETX Holdings II Midco LLC, First lien senior secured loans      
Coupon [7]   6.22%  
Spread [7]   2.50%  
Principal   $ 11,472,000  
Cost   11,496,000  
Fair value   11,525,000  
Investment, Identifier [Axis]: MS FLNGI Owner Holdco, LLC | Senior subordinated loans      
Coupon [4],[5] 9.75%    
Spread [4],[5] 6.00%    
Principal [4] $ 200,000,000    
Cost [4] 196,128,000    
Fair value [4] 196,000,000    
Investment, Identifier [Axis]: Meade Pipeline Co LLC | Affiliated Issuer      
Fair value 222,918,000 214,956,000 0
Investment, Identifier [Axis]: Meade Pipeline Co LLC, Common equity | Affiliated Investment      
Cost [8],[9],[10]   202,888,000  
Fair value [8],[9],[10]   $ 214,956,000  
Shares/ Units [8],[9],[10]   43  
Investment, Identifier [Axis]: Meade Pipeline Co LLC, Common equity | Affiliated Issuer      
Cost [1],[2],[3],[4] 209,829,000    
Fair value [1],[2],[3],[4] $ 222,918,000    
Shares/ Units [1],[2],[3],[4] 43    
Investment, Identifier [Axis]: Meridiam North America Core Infrastructure Fund I (Domestic), LP | Other equity      
Cost [2],[3],[4],[13] $ 596,659,000    
Fair value [2],[3],[4],[13] $ 596,659,000    
Shares/ Units [2],[3],[4],[13] 595,000,000    
Investment, Identifier [Axis]: NRG Energy Inc | First lien senior secured loans      
Coupon [5],[13] 5.65%    
Spread [5],[13] 1.75%    
Principal [13] $ 3,975,000    
Cost [13] 3,975,000    
Fair value [13] $ 3,966,000    
Investment, Identifier [Axis]: Oryx Midstream Services Permian Basin LLC, First lien senior secured loans      
Coupon [7]   5.98%  
Spread [7]   2.25%  
Principal   $ 8,413,000  
Cost   8,398,000  
Fair value   $ 8,446,000  
Investment, Identifier [Axis]: Par Petroleum LLC / Par Petroleum Finance Corp, First lien senior secured loans      
Coupon [7]   6.95%  
Spread [7]   3.25%  
Principal   $ 1,995,000  
Cost   2,002,000  
Fair value   $ 2,001,000  
Investment, Identifier [Axis]: Pasadena Performance Products, LLC | First lien senior secured loans      
Coupon [5] 7.32%    
Spread [5] 3.25%    
Principal $ 5,381,000    
Cost 5,397,000    
Fair value $ 5,399,000    
Investment, Identifier [Axis]: Pasadena Performance Products, LLC, First lien senior secured loans      
Coupon [7]   6.92%  
Spread [7]   3.25%  
Principal   $ 3,889,000  
Cost   3,899,000  
Fair value   3,884,000  
Investment, Identifier [Axis]: Pathfinder Power, LLC | First lien senior secured loans      
Coupon [5] 5.81%    
Spread [5] 2.00%    
Principal $ 49,746,000    
Cost 49,627,000    
Fair value 49,659,000    
Investment, Identifier [Axis]: Pinnacle Buyer, LLC | Delayed Draw Term Loan      
Principal $ 9,979,000    
Investment, Identifier [Axis]: Pinnacle Buyer, LLC | First lien senior secured loan      
Coupon [5],[11] 6.23%    
Spread [5],[11] 2.50%    
Principal [11] $ 8,363,000    
Cost [11] 8,436,000    
Fair value [11] 8,388,000    
Investment, Identifier [Axis]: Pioneer JV Holdings LLC | Common equity      
Cost [2],[3],[4],[11] 713,559,000    
Fair value [2],[3],[4],[11] $ 758,886,000    
Shares/ Units [2],[3],[4],[11] 49    
Investment, Identifier [Axis]: Pioneer JV Holdings LLC | Equity      
Principal $ 770,725,000 768,580,000  
Investment, Identifier [Axis]: Pioneer JV Holdings LLC, Common equity      
Cost [8],[9],[10],[12]   731,872,000  
Fair value [8],[9],[10],[12]   $ 753,613,000  
Shares/ Units [8],[9],[10],[12]   49  
Investment, Identifier [Axis]: Potomac Energy Center, LLC | First lien senior secured loans      
Coupon [5] 6.57%    
Spread [5] 2.75%    
Principal $ 47,614,000    
Cost 47,813,000    
Fair value 47,852,000    
Investment, Identifier [Axis]: Potomac Energy Center, LLC, First lien senior secured loans      
Coupon [7]   6.84%  
Spread [7]   3.00%  
Principal   $ 12,356,000  
Cost   12,379,000  
Fair value   12,449,000  
Investment, Identifier [Axis]: PowerHouse Data LCX, LLC | Delayed Draw Term Loan      
Principal $ 75,000,000 $ 75,000,000  
Investment, Identifier [Axis]: PowerHouse Data LCX, LLC | First lien senior secured loans      
Coupon [4],[5],[11] 9.20%    
Spread [4],[5],[11] 5.45%    
Principal [4],[11] $ 55,700,000    
Cost [4],[11] 55,256,000    
Fair value [4],[11] $ 55,320,000    
Investment, Identifier [Axis]: PowerHouse Data LCX, LLC, First lien senior secured loans      
Coupon [7],[10],[12]   8.62%  
Spread [7],[10],[12]   4.95%  
Principal [10],[12]   $ 15,379,000  
Cost [10],[12]   14,440,000  
Fair value [10],[12]   $ 14,440,000  
Investment, Identifier [Axis]: Prairie ECI Acquiror LP | First lien senior secured loans      
Coupon [5] 7.15%    
Spread [5] 3.25%    
Principal $ 14,744,000    
Cost 14,782,000    
Fair value 14,772,000    
Investment, Identifier [Axis]: Prairie ECI Acquiror LP, First lien senior secured loans      
Coupon [7]   7.47%  
Spread [7]   3.75%  
Principal   $ 8,825,000  
Cost   8,832,000  
Fair value   $ 8,867,000  
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp, First lien senior secured loans      
Coupon [7]   6.58%  
Spread [7]   2.86%  
Principal   $ 6,823,000  
Cost   6,839,000  
Fair value   6,839,000  
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC | Delayed Draw Term Loan      
Principal $ 16,974,000    
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC | First lien senior secured loan      
Coupon [5],[11] 6.57%    
Spread [5],[11] 2.50%    
Principal [11] $ 15,110,000    
Cost [11] 15,213,000    
Fair value [11] $ 15,128,000    
Investment, Identifier [Axis]: QTS Thunder Managing Issuer, LLC | First lien senior secured loans      
Coupon [5] 6.03%    
Spread [5] 2.25%    
Principal $ 25,955,000    
Cost 25,819,000    
Fair value 25,631,000    
Investment, Identifier [Axis]: Ravens Edge Renewables, LLC | Common equity      
Cost [2],[3],[4],[11] 441,605,000    
Fair value [2],[3],[4],[11] $ 441,605,000    
Shares/ Units [2],[3],[4],[11] 4,999    
Investment, Identifier [Axis]: Ravens Edge Renewables, LLC | Equity      
Principal $ 1,405,333,000    
Investment, Identifier [Axis]: Redwood Meade Midstream MPC, LLC | Affiliated Issuer      
Fair value 38,994,000 37,589,000 $ 0
Investment, Identifier [Axis]: Redwood Meade Midstream MPC, LLC, Common equity | Affiliated Investment      
Cost [8],[9],[10]   35,459,000  
Fair value [8],[9],[10]   $ 37,589,000  
Shares/ Units [8],[9],[10]   50  
Investment, Identifier [Axis]: Redwood Meade Midstream MPC, LLC, Common equity | Affiliated Issuer      
Cost [1],[2],[3],[4] 36,730,000    
Fair value [1],[2],[3],[4] $ 38,994,000    
Shares/ Units [1],[2],[3],[4] 50    
Investment, Identifier [Axis]: Resilience Parent, LLC | First lien senior secured loans      
Coupon [5] 6.57%    
Spread [5] 2.50%    
Principal $ 31,540,000    
Cost 31,583,000    
Fair value 31,468,000    
Investment, Identifier [Axis]: Retained Vantage Data Centers Intermediate Holdco, L.P, Senior subordinated loans      
Coupon [7],[9],[10],[12]   9.50%  
Spread [7],[9],[10],[12]   9.50%  
Principal [9],[10],[12]   $ 38,542,000  
Cost [9],[10],[12]   35,345,000  
Fair value [9],[10],[12]   35,304,000  
Investment, Identifier [Axis]: Retained Vantage Data Centers Intermediate Holdco, L.P. | Delayed Draw Term Loan      
Principal $ 185,000,000 $ 185,000,000  
Investment, Identifier [Axis]: Retained Vantage Data Centers Intermediate Holdco, L.P. | Senior subordinated loans      
Coupon [4],[5],[11] 9.50%    
Spread [4],[5],[11] 9.50%    
Principal [4],[11] $ 185,000,000    
Cost [4],[11] 182,206,000    
Fair value [4],[11] $ 185,000,000    
Investment, Identifier [Axis]: Rosen International S.a r.l. | First lien senior secured loans      
Coupon [5],[13] 6.32%    
Spread [5],[13] 2.25%    
Principal [13] $ 26,223,000    
Cost [13] 26,280,000    
Fair value [13] $ 26,236,000    
Investment, Identifier [Axis]: SCIH Salt Holdings Inc. | First lien senior secured loans      
Coupon [5] 6.50%    
Spread [5] 2.75%    
Principal $ 39,482,000    
Cost 39,150,000    
Fair value 39,147,000    
Investment, Identifier [Axis]: SCIH Salt Holdings Inc., First lien senior secured loans      
Coupon [7]   6.52%  
Spread [7]   2.75%  
Principal   $ 7,500,000  
Cost   7,500,000  
Fair value   7,511,000  
Investment, Identifier [Axis]: SI SNM01A Aggregator LLC | Common equity      
Cost [2],[3],[4],[11] 186,667,000    
Fair value [2],[3],[4],[11] $ 186,667,000    
Shares/ Units [2],[3],[4],[11] 179,117,205    
Investment, Identifier [Axis]: SI SNM01A Aggregator LLC | Equity      
Principal $ 219,853,000    
Investment, Identifier [Axis]: SI SNM01B Aggregator JV LLC | Common equity      
Cost [2],[3],[4],[11] 607,170,000    
Fair value [2],[3],[4],[11] $ 607,170,000    
Shares/ Units [2],[3],[4],[11] 574,198,315    
Investment, Identifier [Axis]: SI SNM01B Aggregator JV LLC | Equity      
Principal $ 723,016,000    
Investment, Identifier [Axis]: Saber Power Services, LLC | Delayed Draw Term Loan      
Principal $ 5,500,000    
Investment, Identifier [Axis]: Saber Power Services, LLC | First lien senior secured loan      
Coupon [5],[11] 6.58%    
Spread [5],[11] 2.50%    
Principal [11] $ 4,661,000    
Cost [11] 4,647,000    
Fair value [11] 4,630,000    
Investment, Identifier [Axis]: Senior subordinated loans      
Cost 506,866,000 90,449,000  
Fair value $ 510,064,000 $ 89,618,000  
% of Net Assets 6.59% 4.28%  
Investment, Identifier [Axis]: Sierra Equity Holdings LLC | Common equity      
Cost [2],[3],[4],[11] $ 443,672,000    
Fair value [2],[3],[4],[11] $ 499,710,000    
Shares/ Units [2],[3],[4],[11] 4,900    
Investment, Identifier [Axis]: Sierra Equity Holdings LLC | Equity      
Principal $ 443,991,000 $ 425,424,000  
Investment, Identifier [Axis]: Sierra Equity Holdings LLC, Common equity      
Cost [8],[9],[10],[12]   155,587,000  
Fair value [8],[9],[10],[12]   $ 155,587,000  
Shares/ Units [8],[9],[10],[12]   4,900  
Investment, Identifier [Axis]: South Field Energy LLC | First lien senior secured loans      
Coupon 7.07%    
Spread [5] 3.00%    
Principal $ 37,787,000    
Cost 37,933,000    
Fair value 37,940,000    
Investment, Identifier [Axis]: South Field Energy LLC, First lien senior secured loans      
Coupon [7]   6.67%  
Spread [7]   3.00%  
Principal   $ 10,937,000  
Cost   10,935,000  
Fair value   11,006,000  
Investment, Identifier [Axis]: Stack SJ Holdings Parent A-I, LLC | Delayed Draw Term Loan      
Principal $ 137,500,000 $ 137,500,000  
Investment, Identifier [Axis]: Stack SJ Holdings Parent A-I, LLC | Senior subordinated loans      
Coupon [4],[5],[11] 9.25%    
Spread [4],[5],[11] 9.25%    
Principal [4],[11] $ 129,065,000    
Cost [4],[11] 128,532,000    
Fair value [4],[11] $ 129,064,000    
Investment, Identifier [Axis]: Stack SJ Holdings Parent A-I, LLC, Senior subordinated loans      
Coupon [7],[9],[10],[12]   9.25%  
Spread [7],[9],[10],[12]   9.25%  
Principal [9],[10],[12]   $ 55,742,000  
Cost [9],[10],[12]   55,104,000  
Fair value [9],[10],[12]   $ 54,314,000  
Investment, Identifier [Axis]: Summit Midstream Holdings LLC | Corporate bonds      
Coupon [5] 8.63%    
Principal $ 2,000,000    
Cost 2,082,000    
Fair value 2,040,000    
Investment, Identifier [Axis]: Sunrun Acropolis Owner 2026, LLC | Equity      
Principal 500,000,000    
Investment, Identifier [Axis]: Sunrun Acropolis Owner 2026, LLC | Other equity      
Cost [2],[3],[4],[11] 32,061,000    
Fair value [2],[3],[4],[11] $ 38,158,000    
Shares/ Units [2],[3],[4],[11] 1,000    
Investment, Identifier [Axis]: Talen Energy Supply LLC , First lien senior secured loans      
Coupon [6],[7]   5.67%  
Spread [6],[7]   2.00%  
Principal [6]   $ 11,461,000  
Cost [6]   11,440,000  
Fair value [6]   11,454,000  
Investment, Identifier [Axis]: Tango Holdings LLC, Common equity      
Cost [8],[9],[10],[12]   492,623,000  
Fair value [8],[9],[10],[12]   $ 526,684,000  
Shares/ Units [8],[9],[10],[12]   488,168  
Investment, Identifier [Axis]: Tango Holdings, LLC | Common equity      
Cost [2],[3],[4],[11] $ 701,762,000    
Fair value [2],[3],[4],[11] $ 775,406,000    
Shares/ Units [2],[3],[4],[11] 708,907    
Investment, Identifier [Axis]: Tango Holdings, LLC | Equity      
Principal $ 803,569,000 $ 517,419,000  
Investment, Identifier [Axis]: TerraForm Power Operating, LLC , First lien senior secured loans      
Coupon [7]   5.67%  
Spread [7]   2.00%  
Principal   $ 3,484,000  
Cost   3,469,000  
Fair value   $ 3,482,000  
Investment, Identifier [Axis]: Tiger Acquisition, LLC | First lien senior secured loans 1      
Coupon [5] 6.65%    
Spread [5] 2.75%    
Principal $ 25,615,000    
Cost 25,714,000    
Fair value $ 25,663,000    
Investment, Identifier [Axis]: Tiger Acquisition, LLC | First lien senior secured loans 2      
Coupon [5] 6.40%    
Spread [5] 2.50%    
Principal $ 4,731,000    
Cost 4,755,000    
Fair value $ 4,735,000    
Investment, Identifier [Axis]: TransMontaigne Operating Company L.P. | First lien senior secured loans      
Coupon [5] 6.15%    
Spread [5] 2.25%    
Principal $ 26,619,000    
Cost 26,684,000    
Fair value $ 26,658,000    
Investment, Identifier [Axis]: TransMontaigne Operating Company L.P., First lien senior secured loans      
Coupon [7]   6.22%  
Spread [7]   2.50%  
Principal   $ 13,507,000  
Cost   13,544,000  
Fair value   $ 13,591,000  
Investment, Identifier [Axis]: Traverse Midstream Partners LLC, First lien senior secured loans      
Coupon [7]   6.34%  
Spread [7]   2.50%  
Principal   $ 8,250,000  
Cost   8,292,000  
Fair value   $ 8,258,000  
Investment, Identifier [Axis]: Trilon Group, LLC | First lien senior secured loan      
Coupon [5] 7.25%    
Spread [5] 3.50%    
Principal $ 6,163,000    
Cost 6,194,000    
Fair value $ 6,165,000    
Investment, Identifier [Axis]: USA Compression Partners LP / USA Compression Finance Corp | Corporate bonds 1      
Coupon [5],[13] 7.13%    
Principal [13] $ 3,500,000    
Cost [13] 3,565,000    
Fair value [13] $ 3,528,000    
Investment, Identifier [Axis]: USA Compression Partners LP / USA Compression Finance Corp | Corporate bonds 2      
Coupon [5],[13] 6.25%    
Principal [13] $ 3,500,000    
Cost [13] 3,438,000    
Fair value [13] $ 3,327,000    
Investment, Identifier [Axis]: Venture Global | First lien senior secured loans 1      
Coupon [5],[13] 6.13%    
Spread [5],[13] 2.23%    
Principal [13] $ 10,465,000    
Cost [13] 10,488,000    
Fair value [13] $ 10,459,000    
Investment, Identifier [Axis]: Venture Global | First lien senior secured loans 2      
Coupon [5],[13] 7.32%    
Spread [5],[13] 3.25%    
Principal [13] $ 3,990,000    
Cost [13] 3,956,000    
Fair value [13] $ 4,009,000    
Investment, Identifier [Axis]: Venture Global | First lien senior secured loans 3      
Coupon [4],[5],[13] 6.13%    
Spread [4],[5],[13] 2.23%    
Principal [4],[13] $ 1,309,000    
Cost [4],[13] 1,312,000    
Fair value [4],[13] 1,311,000    
Investment, Identifier [Axis]: Venture Global, First lien senior secured loans 1      
Coupon [6],[7]   5.94%  
Spread [6],[7]   2.23%  
Principal [6]   $ 1,577,000  
Cost [6]   1,581,000  
Fair value [6]   $ 1,568,000  
Investment, Identifier [Axis]: Venture Global, First lien senior secured loans 2      
Coupon [6],[7],[10]   5.94%  
Spread [6],[7],[10]   2.23%  
Principal [6],[10]   $ 197,000  
Cost [6],[10]   198,000  
Fair value [6],[10]   $ 196,000  
Investment, Identifier [Axis]: Voyager JV Holdings LLC | Common equity      
Cost [2],[3],[4],[11] 224,981,000    
Fair value [2],[3],[4],[11] $ 224,981,000    
Shares/ Units [2],[3],[4],[11] 80    
Investment, Identifier [Axis]: Voyager JV Holdings LLC | Equity      
Principal $ 445,098,000    
Investment, Identifier [Axis]: WEC US Holdings Inc. | First lien senior secured loans      
Coupon [5] 5.68%    
Spread [5] 2.00%    
Principal $ 36,178,000    
Cost 36,213,000    
Fair value $ 36,141,000    
Investment, Identifier [Axis]: WEC US Holdings Inc., First lien senior secured loans      
Coupon [7]   5.87%  
Spread [7]   2.00%  
Principal   $ 6,174,000  
Cost   6,178,000  
Fair value   $ 6,182,000  
Investment, Identifier [Axis]: WhiteWater Matterhorn Holdings, LLC | First lien senior secured loans      
Coupon [5] 5.88%    
Spread [5] 1.75%    
Principal $ 23,008,000    
Cost 22,960,000    
Fair value $ 22,844,000    
Investment, Identifier [Axis]: WhiteWater Matterhorn Holdings, LLC, First lien senior secured loans      
Coupon [7]   5.92%  
Spread [7]   2.25%  
Principal   $ 3,550,000  
Cost   3,548,000  
Fair value   $ 3,560,000  
Investment, Identifier [Axis]: WhiteWater Whistler Holdings, LLC | First lien senior secured loans      
Coupon [5] 5.88%    
Spread [5] 1.75%    
Principal $ 18,497,000    
Cost 18,485,000    
Fair value $ 18,421,000    
Investment, Identifier [Axis]: WhiteWater Whistler Holdings, LLC, First lien senior secured loans      
Coupon [7]   5.44%  
Spread [7]   1.75%  
Principal   $ 13,487,000  
Cost   13,470,000  
Fair value   $ 13,431,000  
[1] As defined in the Investment Company Act, the Fund is deemed both to be an “Affiliated Person” and to “Control” this portfolio company because it owns more than 25% of the portfolio company’s outstanding voting securities or it has the power to exercise control over the management or policies of such portfolio company (including through a management agreement). For the nine months ended September 30, 2026, the Fund’s controlled/affiliated investments were as follows:
Company
Fair value as of December 31, 2025
Gross AdditionsGross ReductionsNet realized gains/(losses)Net unrealized gains/(losses)
Fair value as of September 30, 2026
Dividend and Interest Income
Meade Pipeline Co LLC$214,956 $9,451 $2,509 $— $1,020 $222,918 $20,769 
Redwood Meade Midstream MPC, LLC37,589 1,668 397 — 134 38,994 2,184 
AEJV SPV LP Membership Interest— 738,725 47,051 — 402 692,076 10,328 
$252,545 $749,844 $49,957 $— $1,556 $953,988 $33,281 
[2] Securities exempt from registration under the Securities Act of 1933, as amended (the “1933 Act”) and may be deemed “restricted securities” subject to legal restrictions on sales. As of September 30, 2026, the aggregate fair value of these securities is $8,551.6 million, which represents 110.69% of the Fund’s (as defined below) net assets or 77.74% of the Fund’s total assets.
[3] These assets are pledged as collateral under the Fund’s or the Fund’s consolidated subsidiaries’ various credit facilities and, as a result, are not directly available to the creditors of the Fund to satisfy any obligations of the Fund other than the obligations under each of the respective credit facilities (see “Note 5. Debt” to the unaudited consolidated financial statements for more information).
[4] These investments were valued using significant unobservable inputs and are considered Level 3 investments. See “Note 8. Fair Value of Financial Instruments” to the unaudited consolidated financial statements for more information regarding the fair value of the Fund’s investments.
[5] Variable rate loans to the Fund’s portfolio companies bear interest at a rate that may be determined by reference to the Secured Overnight Financing Rate (“SOFR”) or an alternate base rate (commonly based on the Federal Funds Rate or the Prime Rate), at the borrower’s option, which reset annually (A), semiannually (S), quarterly (Q), bi-monthly (B), monthly (M) or daily (D). For each such loan, the Fund has provided the interest rate in effect on the date presented. Coupon rate represents the all-in rate as of September 30, 2026.
[6] This portfolio company is not a qualifying asset under Section 55(a) of the 1940 Act. Under the 1940 Act, the Fund may not acquire any non-qualifying asset unless, at the time such acquisition is made, qualifying assets represent at least 70% of the Fund's total assets. Pursuant to Section 55(a) of the 1940 Act, 0.54% of the Fund’s total assets are represented by investments at fair value and other assets that are considered “non-qualifying assets” as of December 31, 2025.
[7] Variable rate loans to the Fund’s portfolio companies bear interest at a rate that may be determined by reference to SOFR or an alternate base rate (commonly based on the Federal Funds Rate or the Prime Rate), at the borrower’s option, which reset annually (A), semiannually (S), quarterly (Q), bi-monthly (B), monthly (M) or daily (D). For each such loan, the Fund has provided the interest rate in effect on the date presented. Coupon rate represents the all-in rate as of December 31, 2025.
[8] Securities exempt from registration under the 1933 Act and may be deemed “restricted securities” subject to legal restrictions on sales. As of December 31, 2025, the aggregate fair value of these securities is $2,522.5 million, which represents 120.43% of the Fund’s net assets or 73.01% of the Fund’s total assets.
[9] These assets are pledged as collateral under the Fund’s or the Fund’s consolidated subsidiaries’ various credit facilities and, as a result, are not directly available to the creditors of the Fund to satisfy any obligations of the Fund other than the obligations under each of the respective credit facilities (see “Note 5. Debt” to the unaudited consolidated financial statements for more information).
[10] These investments were valued using significant unobservable inputs and are considered Level 3 investments. See “Note 8. Fair Value of Financial Instruments” to the unaudited consolidated financial statements for more information regarding the fair value of the Fund’s investments.
[11] As of September 30, 2026, the Fund had commitments to fund various delayed draw term loans and equity investments. Such commitments are subject to the satisfaction of certain conditions set forth in the documents governing these loans and there can be no assurance that such conditions will be satisfied. See “Note 7. Commitments and Contingencies” to the unaudited consolidated financial statements for more information on delayed draw term loan commitments related to certain portfolio companies. Principal reflects the funded principal as of September 30, 2026.
[12] As of December 31, 2025, the Fund had commitments to fund various delayed draw term loans and equity investments. Such commitments are subject to the satisfaction of certain conditions set forth in the documents governing these loans and there can be no assurance that such conditions will be satisfied. See “Note 7. Commitments and Contingencies” to the unaudited consolidated financial statements for more information on delayed draw term loan commitments related to certain portfolio companies.
[13] This portfolio company is not a qualifying asset under Section 55(a) of the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, the “1940 Act”). Under the 1940 Act, the Fund may not acquire any non-qualifying asset unless, at the time such acquisition is made, qualifying assets represent at least 70% of the Fund’s total assets. Pursuant to Section 55(a) of the 1940 Act, 6.68% of the Fund’s total assets are represented by investments at fair value and other assets that are considered “non-qualifying assets” as of September 30, 2026.