Form 4 Filing for Mayville Engineering Company, Inc.

This filing details transactions made by Craig D. Nichols, SVP of Operations & Supply Chain at Mayville Engineering Company, Inc. On March 15, 2026, Nichols acquired 5,808 shares of common stock with a transaction code "M" and disposed of 1,662 shares at $16.67 per share with transaction code "F", resulting in 4,146 shares. Additionally, there were transactions involving Restricted Stock Units: 5,808 units were disposed of (transaction code "D") and 14,998 units were acquired (transaction code "A"). These RSUs vest over a three-year period starting March 15, 2026, or March 15, 2027, as indicated by footnotes F1 and F2. Nichols also holds 1,134 shares of common stock through a 401(k) plan.