MSC Adviser I

Houston – October 12, 2026 -- MSC Income Fund (NYSE: MSIF) will switch from quarterly to monthly regular dividends in July 2026, with its board declaring $0.11 per share for each of July, August and September, or $0.33 per share for the third quarter.

Board declares three monthly payments totaling $0.33 per share

The Board of Directors approved regular monthly cash dividends of $0.11 per share payable in July, August and September 2026. The change in payment frequency starts with the July payment.

Supplemental $0.03 dividend drawn from undistributed taxable income

The board also declared a supplemental cash dividend of $0.03 per share, payable in September 2026. The Fund will pay it out of undistributed taxable income, defined as taxable income in excess of dividends paid, as of March 31, 2026.

Houston – October 12, 2026 -- MSC Income Fund, Inc. (NYSE: MSIF) will release its second quarter 2026 results on Thursday, August 6, 2026, after the financial markets close, and will discuss them on a conference call the next morning.

MSC Income Fund schedules investor call for August 7 at 11:00 a.m. Eastern

The call is set for Friday, August 7, 2026, at 11:00 a.m. Eastern time. It will be broadcast live by phone and over the Internet, so investors can join by phone or through an audio webcast.

The Fund said that nothing on its website or disclosed on the call, including the webcast and archived versions, is incorporated by reference into the press release or its filings with the U.S. Securities and Exchange Commission.