Exhibit 99.1

	NEWS RELEASE
	Contacts: MSC Income Fund, Inc. Dwayne L. Hyzak, CEO, dhyzak@mainstcapital.com Cory E. Gilbert, CFO, cgilbert@mainstcapital.com 713-350-6000 Dennard Lascar Investor Relations Ken Dennard / ken@dennardlascar.com Zach Vaughan / zvaughan@dennardlascar.com 713-529-6600

MSC Income Fund Announces Second Quarter 2025 Private Loan Portfolio

Activity

HOUSTON – July 10, 2025 – MSC Income Fund, Inc. (NYSE: MSIF) (“MSC Income” or the

“Company”) is pleased to announce the following recent activity in its private loan portfolio. During

the second quarter of 2025, MSC Income originated new or increased commitments in its private loan

portfolio of $65.5 million and funded total investments across its private loan portfolio with a cost

basis totaling $44.0 million.

The following represent notable new private loan commitments and investments during the second

quarter of 2025:

•$18.6 million in a first lien senior secured loan, $3.2 million in a first lien senior secured

revolver and $7.7 million in a first lien senior secured delayed draw loan to a national provider

of custom power system platforms;

•$19.8 million in a first lien senior secured loan to a competitive local exchange carrier

providing a wide range of communication services; and

•$8.7 million in a first lien senior secured loan and $1.5 million in a first lien senior secured

revolver to a vertically integrated manufacturer of plastic promotional and packaging products.

As of June 30, 2025, MSC Income’s private loan portfolio included total investments at cost of

approximately $764.3 million across 82 unique companies. The private loan portfolio, as a percentage

of cost, included 93.2% invested in first lien debt investments and 6.8% invested in equity investments

or other securities.

ABOUT MSC INCOME FUND, INC.

The Company (www.mscincomefund.com) is a principal investment firm that primarily provides debt

capital to private companies owned by or in the process of being acquired by a private equity fund.

The Company’s portfolio investments are typically made to support leveraged buyouts,

recapitalizations, growth financings, refinancings and acquisitions of companies that operate in diverse

industry sectors. The Company seeks to partner with private equity fund sponsors and primarily

invests in secured debt investments within its private loan investment strategy. The Company also

maintains a portfolio of customized long-term debt and equity investments in lower middle market

companies, and through those investments, the Company has partnered with entrepreneurs, business

owners and management teams in co-investments with Main Street Capital Corporation (NYSE:

MAIN) (“Main Street”) utilizing the customized “one-stop” debt and equity financing solutions

provided in Main Street’s lower middle market investment strategy. The Company’s private loan

portfolio companies generally have annual revenues between $25 million and $500 million. The

Company’s lower middle market portfolio companies generally have annual revenues between $10

million and $150 million.

ABOUT MSC ADVISER I, LLC

MSC Adviser I, LLC (“MSCA”) is a wholly-owned subsidiary of Main Street that is registered as an

investment adviser under the Investment Advisers Act of 1940, as amended. MSCA serves as the

investment adviser and administrator of the Company in addition to several other advisory clients.