X0609 4 2026-08-05 0 0000876437 MGIC INVESTMENT CORP MTG 0001465105 Mattke Timothy J. false C/O MGIC INVESTMENT CORPORATION 250 EAST KILBOURN AVENUE MILWAUKEE WI 53202 1 1 0 0 Chief Executive Officer 1 Common Stock 2026-08-05 4 S 0 137113 30.517 D 980892.401 D The transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 05/04/2026. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.38 to $30.895, inclusive. The reporting person undertakes to provide MGIC Investment Corporation, any security holder of MGIC Investment Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Leslie A. Schunk, Attorney-in-Fact 2026-08-06