v3.26.1
SCHEDULE OF INVESTMENTS IN AND ADVANCES TO AFFILIATES (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Schedule of Investments [Line Items]      
Investment Owned, Fair Value, Beginning Balance $ 225,511,505    
Unrealized Gain (Loss) on Investments 158,724,039 $ 2,888,878  
Investment Owned, Fair Value, Ending Balance $ 388,534,651   $ 225,511,505
Investment Owned, Net Assets, Percentage 107.50%   109.80%
Realized Investment Gains (Losses) $ 890,513 (17,951)  
Controlled Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value, Beginning Balance [1],[2] 1,600,000 $ 1,600,000
Transfer In (Out) [1],[2]     (1,602,940)
Unrealized Gain (Loss) on Investments [1],[2]     2,940
Investment Owned, Fair Value, Ending Balance [1],[2]    
Investment Owned, Net Assets, Percentage [1],[2]    
Controlled Investments [Member] | Common Stock [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value, Beginning Balance [1],[2] 1,101,695 $ 1,101,695
Transfer In (Out) [1],[2]     (1,103,719)
Unrealized Gain (Loss) on Investments [1],[2]     2,024
Investment Owned, Fair Value, Ending Balance [1],[2]    
Investment Owned, Net Assets, Percentage [1],[2]    
Controlled Investments [Member] | Options Held [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value, Beginning Balance [1],[2] 498,305 $ 498,305
Transfer In (Out) [1],[2],[3]     (499,221)
Unrealized Gain (Loss) on Investments [1],[2]     916
Investment Owned, Fair Value, Ending Balance [1],[2]    
Investment Owned, Net Assets, Percentage [1],[2]    
Non Controlled Affiliate Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value, Beginning Balance 8,207,367 [4],[5] 9,268,827 [1],[6] $ 9,268,827 [1],[6]
Transfer In (Out) [4],[5]   1,000,000 [1],[6]
Unrealized Gain (Loss) on Investments (1,269,022) [4],[5]   (2,061,460) [1],[6]
Investment Owned, Fair Value, Ending Balance [4],[5] $ 6,938,345   $ 8,207,367
Investment Owned, Net Assets, Percentage 1.92% [4],[5]   4.00% [1],[6]
Non Controlled Affiliate Investments [Member] | Common Stock [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value, Beginning Balance [4],[5],[7] [1],[6] [1],[6]
Transfer In (Out) [4],[5],[7]   [1],[6]
Unrealized Gain (Loss) on Investments [4],[5]   [1],[6]
Investment Owned, Fair Value, Ending Balance [4],[5]   [7]
Investment Owned, Net Assets, Percentage [4],[5]   [1],[6]
Non Controlled Affiliate Investments [Member] | Preferred Stock [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value, Beginning Balance $ 8,207,367 [4],[5] 9,268,827 [1],[6] $ 9,268,827 [1],[6]
Transfer In (Out) [4],[5]   1,000,000 [1],[6]
Unrealized Gain (Loss) on Investments (1,269,022) [4],[5]   (2,061,460) [1],[6]
Investment Owned, Fair Value, Ending Balance [4],[5] $ 6,938,345   $ 8,207,367
Investment Owned, Net Assets, Percentage 1.92% [4],[5]   4.00% [1],[6]
Non Controlled Affiliate Investments [Member] | Preferred Stock [Member] | Knowledge Networks [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value, Beginning Balance [4],[5] [1],[6] [1],[6]
Transfer In (Out) [4],[5]   [1],[6]
Unrealized Gain (Loss) on Investments [4],[5]   [1],[6]
Investment Owned, Fair Value, Ending Balance [4],[5]  
Investment Owned, Net Assets, Percentage [4],[5]   [1],[6]
Non Controlled Affiliate Investments [Member] | Preferred Stock [Member] | Interactive Learning [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value, Beginning Balance $ 7,857,367 [4],[5] 9,268,827 [1],[6] $ 9,268,827 [1],[6]
Transfer In (Out) [4],[5]   [1],[6]
Unrealized Gain (Loss) on Investments (919,022) [4],[5]   (1,411,460) [1],[6]
Investment Owned, Fair Value, Ending Balance [4],[5] $ 6,938,345   $ 7,857,367
Investment Owned, Net Assets, Percentage 1.92% [4],[5]   3.83% [1],[6]
Commercial Streaming Solutions Inc [Member] | Controlled Investments [Member] | Common Stock [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Balance, Shares [4],[5] 10,548,522    
Commercial Streaming Solutions Inc [Member] | Non Controlled Affiliate Investments [Member] | Preferred Stock [Member] | Series A1 Preferred Stock [Member] | Interactive Media and Services [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Balance, Shares [1],[6]     10,548,522
Investment Owned, Fair Value, Beginning Balance $ 350,000 [4],[5] [1],[6] [1],[6]
Transfer In (Out) [4],[5]   1,000,000 [1],[6]
Unrealized Gain (Loss) on Investments (350,000) [4],[5]   (650,000) [1],[6]
Investment Owned, Fair Value, Ending Balance [4],[5]   $ 350,000
Investment Owned, Net Assets, Percentage [4],[5]   0.17% [1],[6]
Maven Research, Inc. [Member] | Non Controlled Affiliate Investments [Member] | Preferred Stock [Member] | Series C Preferred Stock [Member] | Knowledge Networks [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Balance, Shares 318,979 [4],[5]   318,979 [1],[6]
Investment Owned, Fair Value, Beginning Balance [4],[5] [1],[6] [1],[6]
Transfer In (Out) [4],[5]   [1],[6]
Unrealized Gain (Loss) on Investments [4],[5]   [1],[6]
Investment Owned, Fair Value, Ending Balance [4],[5]  
Investment Owned, Net Assets, Percentage [4],[5]   [1],[6]
Maven Research, Inc. [Member] | Non Controlled Affiliate Investments [Member] | Preferred Stock [Member] | Series B Preferred Stock [Member] | Knowledge Networks [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Balance, Shares 49,505 [4],[5]   49,505 [1],[6]
Investment Owned, Fair Value, Beginning Balance [4],[5] [1],[6] [1],[6]
Transfer In (Out) [4],[5]   [1],[6]
Unrealized Gain (Loss) on Investments [4],[5]   [1],[6]
Investment Owned, Fair Value, Ending Balance [4],[5]  
Investment Owned, Net Assets, Percentage [4],[5]   [1],[6]
StormWind, LLC [Member] | Non Controlled Affiliate Investments [Member] | Preferred Stock [Member] | Preferred Shares, Series D 8% [Member] | Interactive Learning [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Balance, Shares 329,337 [4],[5],[7]   329,337 [1],[6],[8]
Investment Owned, Fair Value, Beginning Balance $ 435,806 [4],[5],[7] 501,626 [1],[6],[8] $ 501,626 [1],[6],[8]
Transfer In (Out) [4],[5],[7]   [1],[6],[8]
Unrealized Gain (Loss) on Investments (37,093) [4],[5],[7]   (65,820) [1],[6],[8]
Investment Owned, Fair Value, Ending Balance [4],[5],[7] $ 398,713   $ 435,806
Investment Owned, Net Assets, Percentage 0.11% [4],[5],[7]   0.21% [1],[6],[8]
StormWind, LLC [Member] | Non Controlled Affiliate Investments [Member] | Preferred Stock [Member] | Preferred Shares, Series C 8% [Member] | Interactive Learning [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Balance, Shares 2,779,134 [4],[5],[7]   2,779,134 [1],[6],[8]
Investment Owned, Fair Value, Beginning Balance $ 4,760,083 [4],[5],[7] 5,376,994 [1],[6],[8] $ 5,376,994 [1],[6],[8]
Transfer In (Out) [4],[5],[7]   [1],[6],[8]
Unrealized Gain (Loss) on Investments (417,992) [4],[5],[7]   (616,911) [1],[6],[8]
Investment Owned, Fair Value, Ending Balance [4],[5],[7] $ 4,342,090   $ 4,760,083
Investment Owned, Net Assets, Percentage 1.20% [4],[5],[7]   2.32% [1],[6],[8]
StormWind, LLC [Member] | Non Controlled Affiliate Investments [Member] | Preferred Stock [Member] | Preferred Shares, Series B 8% [Member] | Interactive Learning [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Balance, Shares 3,279,629 [4],[5],[7]   3,279,629 [1],[6],[8]
Investment Owned, Fair Value, Beginning Balance $ 2,578,473 [4],[5],[7] 3,233,922 [1],[6],[8] $ 3,233,922 [1],[6],[8]
Transfer In (Out) [4],[5],[7]   [1],[6],[8]
Unrealized Gain (Loss) on Investments (425,665) [4],[5],[7]   (655,449) [1],[6],[8]
Investment Owned, Fair Value, Ending Balance [4],[5],[7] $ 2,152,809   $ 2,578,473
Investment Owned, Net Assets, Percentage 0.60% [4],[5],[7]   1.26% [1],[6],[8]
StormWind, LLC [Member] | Non Controlled Affiliate Investments [Member] | Preferred Stock [Member] | Preferred Shares, Series A 8% [Member] | Interactive Learning [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Balance, Shares 366,666 [4],[5],[7]   366,666 [1],[6],[8]
Investment Owned, Fair Value, Beginning Balance $ 83,005 [4],[5],[7] 156,285 [1],[6],[8] $ 156,285 [1],[6],[8]
Transfer In (Out) [4],[5],[7]   [1],[6],[8]
Unrealized Gain (Loss) on Investments (38,272) [4],[5],[7]   (73,280) [1],[6],[8]
Investment Owned, Fair Value, Ending Balance [4],[5],[7] $ 44,734   $ 83,005
Investment Owned, Net Assets, Percentage 0.01% [4],[5],[7]   0.04% [1],[6],[8]
Curious.com, Inc. [Member] | Non Controlled Affiliate Investments [Member] | Common Stock [Member] | Online Education [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Balance, Shares 1,135,944 [4],[5]   1,135,944 [1],[6]
Investment Owned, Fair Value, Beginning Balance [4],[5],[7] [1],[6] [1],[6]
Transfer In (Out) [4],[5],[7]   [1],[6]
Unrealized Gain (Loss) on Investments [4],[5]   [1],[6]
Investment Owned, Fair Value, Ending Balance [4],[5]   [7]
Investment Owned, Net Assets, Percentage [4],[5]   [1],[6]
Colombier Sponsor II LLC [Member] | Controlled Investments [Member] | Common Stock [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Balance, Shares [1],[2],[3],[9]    
Investment Owned, Fair Value, Beginning Balance [1],[2],[3],[9] 1,101,695 $ 1,101,695
Transfer In (Out) [1],[2],[3],[9]     (1,103,719)
Unrealized Gain (Loss) on Investments [1],[2],[3],[9]     2,024
Investment Owned, Fair Value, Ending Balance [1],[2],[3],[9]    
Investment Owned, Net Assets, Percentage    
Colombier Sponsor II LLC [Member] | Controlled Investments [Member] | Options Held [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Balance, Shares [1],[2],[3],[9]    
Investment Owned, Fair Value, Beginning Balance [1],[2],[3],[9] $ 498,305 $ 498,305
Transfer In (Out) [1],[2],[3],[9]     (499,221)
Unrealized Gain (Loss) on Investments [1],[2],[3],[9]     916
Investment Owned, Fair Value, Ending Balance [1],[2],[3],[9]    
Investment Owned, Net Assets, Percentage [1],[2],[3],[9]    
Investments in and Advances to Affiliates, at Fair Value, Gross Reductions    
Realized Investment Gains (Losses)    
[1] All portfolio investments are non-income-producing, unless otherwise identified. Equity investments may be subject to lock-up restrictions upon their IPO. Preferred dividends are generally only payable when declared and paid by the portfolio company’s board of directors. The Company’s directors, officers, employees and staff, as applicable, may serve on the board of directors of the Company’s portfolio investments. (Refer to “Note 3—Related-Party Arrangements”). All portfolio investments are considered Level 3 and valued using significant unobservable inputs, unless otherwise noted. (Refer to “Note 4—Investments at Fair Value”). All of the Company’s portfolio investments are restricted as to resale, unless otherwise noted, and were valued at fair value as determined in good faith by the Company’s Board of Directors. (Refer to “Note 2—Significant Accounting Policies—Investments at Fair Value”).
[2] “Control Investments” are investments in those companies that are “Controlled Companies” of SuRo Capital, as defined in the 1940 Act. In general, under the 1940 Act, the Company would “Control” a portfolio company if the Company beneficially owns, directly or indirectly, more than 25% of its outstanding voting securities (i.e., securities with the right to elect directors) and/or had the power to exercise control over the management or policies of such portfolio company.
[3] Indicates assets that SuRo Capital believes do not represent “qualifying assets” under Section 55(a) of the 1940 Act. Of the Company’s total investments as of December 31, 2025, 32.70% of its total investments are non-qualifying assets, excluding cash and short-term US treasuries.
[4] All portfolio investments are non-income-producing, unless otherwise identified. Equity investments may be subject to lock-up restrictions upon their IPO. Preferred dividends are generally only payable when declared and paid by the portfolio company’s board of directors. The Company’s directors, officers, employees and staff, as applicable, may serve on the board of directors of the Company’s portfolio investments. (Refer to “Note 3—Related-Party Arrangements”). All portfolio investments are considered Level 3 and valued using significant unobservable inputs, unless otherwise noted. (Refer to “Note 4—Investments at Fair Value”). All of the Company’s portfolio investments are restricted as to resale, unless otherwise noted, and were valued at fair value as determined in good faith by the Company’s Board of Directors. (Refer to “Note 2—Significant Accounting Policies—Investments at Fair Value”).
[5] “Affiliate Investments” are investments in those companies that are “Affiliated Companies” of SuRo Capital, as defined in the 1940 Act. In general, a company is deemed to be an “Affiliate” of SuRo Capital if SuRo Capital beneficially owns, directly or indirectly, between 5% and 25% of the voting securities (i.e., securities with the right to elect directors) of such company.
[6] “Affiliate Investments” are investments in those companies that are “Affiliated Companies” of SuRo Capital, as defined in the 1940 Act. In general, a company is deemed to be an “Affiliate” of SuRo Capital if SuRo Capital beneficially owns, directly or indirectly, between 5% and 25% of the voting securities (i.e., securities with the right to elect directors) of such company.
[7] SuRo Capital’s investments in StormWind, LLC are held through SuRo Capital Corp.’s wholly owned subsidiary, GSVC SW Holdings, Inc.
[8] SuRo Capital’s investments in StormWind, LLC are held through SuRo Capital Corp.’s wholly owned subsidiary, GSVC SW Holdings, Inc.
[9] Denotes an investment that is the sponsor of a special purpose acquisition company formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses.