Exhibit 99.1

	NEWS RELEASE
	Contacts: Main Street Capital Corporation Dwayne L. Hyzak, CEO, dhyzak@mainstcapital.com Ryan R. Nelson, CFO, rnelson@mainstcapital.com 713-350-6000 Dennard Lascar Investor Relations Ken Dennard / ken@dennardlascar.com Zach Vaughan / zvaughan@dennardlascar.com 713-529-6600

Main Street Announces Completion of

$150.0 Million Investment Grade Notes Offering

HOUSTON – April 9, 2026 – Main Street Capital Corporation (NYSE: MAIN) (“Main Street”)

is pleased to announce the closing of a private notes offering totaling $150.0 million in aggregate

principal amount (the “Notes”).  The Notes are unsecured and bear interest at a fixed rate of

6.93% per year, payable semiannually, mature on April 15, 2031 and may be redeemed in whole

or in part at any time or from time to time at Main Street’s option at par plus accrued interest to

the prepayment date and, if applicable, a make-whole premium.

Main Street intends to use the proceeds from this offering to repay outstanding indebtedness,

including amounts outstanding under its corporate revolving credit facility and/or its special

purpose vehicle revolving credit facility, to make investments in accordance with its investment

objective and strategies, to make investments in marketable securities and idle funds

investments, to pay operating expenses and other cash obligations and for general corporate

purposes.

The Notes have not been and will not be registered under the Securities Act of 1933, as amended

(the “Securities Act”), or any state securities laws and may not be offered or sold in the United

States absent registration or an applicable exemption from the registration requirements of the

Securities Act and applicable state securities laws. This news release shall not constitute an offer

to sell or a solicitation of an offer to purchase the Notes or any other securities and shall not

constitute an offer, solicitation or sale in any state or jurisdiction in which such an offer,

solicitation or sale would be unlawful.

ABOUT MAIN STREET CAPITAL CORPORATION

Main Street (www.mainstcapital.com) is a principal investment firm that primarily provides

customized long-term debt and equity capital solutions to lower middle market companies and

debt capital to private companies owned by or in the process of being acquired by a private

equity fund. Main Street’s portfolio investments are typically made to support management

buyouts, recapitalizations, growth financings, refinancings and acquisitions of companies that

operate in diverse industry sectors. Main Street seeks to partner with entrepreneurs, business

owners and management teams and generally provides customized “one-stop” debt and equity

financing solutions within its lower middle market investment strategy. Main Street seeks to

partner with private equity fund sponsors and primarily invests in secured debt investments in its

private loan investment strategy. Main Street’s lower middle market portfolio companies

generally have annual revenues between $10 million and $150 million. Main Street’s private

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

Main Street, through its wholly-owned portfolio company MSC Adviser I, LLC (“MSC

Adviser”), also maintains an asset management business through which it manages investments

for external parties. MSC Adviser is registered as an investment adviser under the Investment

Advisers Act of 1940, as amended.

FORWARD-LOOKING STATEMENTS

This press release contains certain forward-looking statements, including but not limited to the

use of the proceeds of the offering. Any such statements other than statements of historical fact

are likely to be affected by other unknowable future events and conditions, including elements of

the future that are or are not under Main Street’s control, and that Main Street may or may not

have considered; accordingly, such statements cannot be guarantees or assurances of any aspect

of future performance. Actual performance, events and results could vary materially from these

estimates and projections of the future as a result of a number of factors, including those

described from time to time in Main Street’s filings with the U.S. Securities and Exchange

Commission. Such statements speak only as of the time when made and are based on information

available to Main Street as of the date hereof and are qualified in their entirety by this cautionary

statement. Main Street assumes no obligation to revise or update any such statement now or in

the future.