Form 4 Filing for Mayville Engineering Company, Inc.

Tania Wingfield, a director at Mayville Engineering Company, Inc. (MEC), reported transactions on April 21, 2026. She acquired 5,959 Director Restricted Stock Units (RSUs) and disposed of 5,949 RSUs. These RSUs are convertible into Common Stock. The RSUs vested one year from the grant date or at the next annual shareholder meeting. Wingfield also acquired 5,949 shares of Common Stock. The report was signed by Garrett F. Bishop as attorney-in-fact for Wingfield on April 23, 2026. This filing details changes in beneficial ownership of securities.