Quarterly report [Sections 13 or 15(d)]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
6 Months Ended
Jun. 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
June 30,
Six Months Ended
June 30,
2026 2025 2026 2025
(in thousands)
Interest, dividend and fee income:
Interest income $ 30,040  $ 29,349  $ 59,420  $ 56,773 
Dividend income 3,829  4,956  7,366  10,098 
Fee income 1,831  1,338  3,001  1,999 
Total investment income $ 35,700  $ 35,643  $ 69,787  $ 68,870