CAPITAL SOUTHWEST CORP — Proxy Solicitation & Information Statement 2026

Jun 3, 2026

DEFA14A 1 defa14afy2026emla.htm DEFA14A Document created using Wdesk Copyright 2026 Workiva DEFA14A (FY 2026) (Email)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934 (Amendment No. )

Filed by the Registrant ý
Filed by a Party other than the Registrant o
Check the appropriate box:
o	Preliminary Proxy Statement
o	Confidential, For Use of the Commission Only (as permitted by Rule 14a‑6(e)(2))
o	Definitive Proxy Statement
ý	Definitive Additional Materials
o	Soliciting Material Pursuant to Rule 14a‑11(c) or Rule 14a‑12
CAPITAL SOUTHWEST CORPORATION
(Name of Registrant as Specified In Its Charter)
(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)
Payment of Filing Fee (Check the appropriate box):
ý	No fee required.
o	Fee paid previously with preliminary materials.
o	Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

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1 Be the vote that counts. CAPITAL SOUTHWEST CORPORATION 2026 Annual Meeting

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2 July 22, 2026 VOTE NOW Why Should I Vote? As an investor in this security, you have the right to vote on important matters. This is your opportunity to make a direct impact on your investment. Your vote counts! Ways to Vote ProxyVote 800.690.6903 Virtual Meeting Important Information For holders as of May 26, 2026 Vote Common Shares by: July 21, 2026 Control Number: Vote Plan Shares by: July 19, 2026

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3 View documents: Annual Report | Notice of Meeting and Proxy Statement | Shareholder Letter | © 2026 Broadridge Financial Solutions Inc. P.O. Box 1310, Brentwood, NY 11717 ProxyVote and Broadridge are trademarks of Broadridge Financial Solutions Inc. CUSIP is a registered trademark of the American Bankers Association. All other registered marks belong to their respective owners. Email Settings | Terms and Conditions | Privacy Statement