MGIC INVESTMENT CORP

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 [X]

Filed by a Party other than the Registrant [ ]

Check the appropriate box:

[ ] Preliminary Proxy Statement

[ ] Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

[X] Definitive Proxy Statement

[ ] Definitive Additional Materials

[ ] Soliciting Material under §240.14a-12

MGIC Investment Corporation

Notice of 2026 Annual Meeting of Shareholders

To MGIC Investment Corporation Shareholders:

At our 2026 Annual Shareholders’ Meeting, you will be asked to vote upon the following proposals:

Your vote is very important. Whether or not you plan to attend our Annual Meeting, we encourage you to read our proxy materials and to vote as soon as possible using one of the methods described beginning on page 75.

By Order of the Board of Directors,

Paula C. Maggio

Executive Vice President, General Counsel and Secretary

March 20, 2026

Table of Contents

MGIC Investment CorporationP.O. Box 488MGIC Plaza, 270 East Kilbourn AvenueMilwaukee, WI 53201

Proxy Statement

Our Board of Directors is soliciting proxies for the Annual Meeting of Shareholders to be held Thursday, April 23, 2026 at 9:00 a.m. Central Time, via webcast at www.virtualshareholdermeeting.com/MTG2026, and at any postponement or adjournment of the meeting. In this Proxy Statement we sometimes refer to MGIC Investment Corporation as “the Company,” “we” or “us.” This Proxy Statement and the enclosed form of proxy are being mailed to shareholders beginning on March 20, 2026. If you have any questions about attending our Annual Meeting, you can call Investor Relations at (414) 347-2635.