Exhibit 99.1 Morgan Stanley Direct Lending Fund Announces December 31, 2023 Financial Results and Declares First Quarter 2024 Dividend of $0.50 per Share NEW YORK, NY, March 1, 2024 — Morgan Stanley Direct Lending Fund (NYSE: MSDL) (“MSDL” or the “Company”), a business development company externally managed by MS Capital Partners Adviser Inc. (the “Adviser”), today announced its financial results for the fourth quarter and fiscal year ended December 31, 2023. “MSDL generated record performance to complete 2 ...