Main Street Capital Corporation

Houston – October 12, 2026 -- MSC Income Fund (NYSE: MSIF) realized an $11.6 million gain on the exit of its equity investment in Centre Technologies Holdings, LLC, delivering a 40.1% annual internal rate of return and an 8.8x money-invested multiple on the equity position.

Majority recapitalization triggers full exit of debt and equity stakes

The Fund exited both its debt and equity investments in Centre after the Houston-based IT services provider completed a majority recapitalization with a new financial sponsor. Centre, founded in 2006, offers managed services, cloud solutions, cyber security, IT consulting and business intelligence services to lower and middle market businesses, often acting as a fully outsourced IT department.

Houston – October 12, 2026 -- MSC Income Fund (NYSE: MSIF) plans to hand the CEO role to Nicholas T. Meserve in the fourth quarter of 2026, while Dwayne L. Hyzak, Chairman and CEO since October 2020, stays on as Executive Chairman.

Hyzak to work alongside Meserve as Executive Chairman

Hyzak will work closely with Meserve in his Executive Chairman capacity. The Fund's board of directors designed the transition as part of its long-term succession plan. The timing is described as presently planned, so it remains subject to change.

Meserve has led private loan strategy since the Fund's inception

Meserve is a Managing Director of MSC Income and group head of its private credit investment team. He has held the Managing Director role since 2020. Earlier, he served on the Fund's Board from 2016 until 2020.

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.

Houston – October 12, 2026 -- MSC Income Fund (NYSE: MSIF) will pay regular monthly dividends of $0.11 per share for each of October, November and December 2026, totaling $0.33 per share for the fourth quarter, after its Board of Directors approved the payouts.

Board adds $0.03 supplemental dividend for December payment

The board also declared a supplemental cash dividend of $0.03 per share, payable in December 2026. Combined with the regular monthly payments, the fourth-quarter distribution comes to $0.36 per share.

The supplemental payment will come from the Fund's undistributed taxable income, defined as taxable income in excess of dividends paid, as of June 30, 2026.