Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-38894 Mayville Engineering Company, Inc. (Exact name of Registrant as specified in its Charter) Wisconsin 39-0944729 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO S ...