Quarterly report [Sections 13 or 15(d)]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 9 Months Ended
Sep. 30, 2026
Accounting Policies [Abstract]  
Schedule of Investment Income
A summarized presentation of total investment income MSC Income earned from its Investment Portfolio in each of the periods presented is as follows:
Three Months Ended
September 30,		 Nine Months Ended
September 30,
2026 2025 2026 2025
(in thousands)
Interest, dividend and fee income:
Interest income $ 30,238  $ 30,117  $ 89,658  $ 86,890 
Dividend income 3,832  3,652  11,198  13,750 
Fee income 1,459  1,598  4,460  3,597 
Total investment income $ 35,529  $ 35,367  $ 105,316  $ 104,237