Sean P. Leuba - 11 Aug 2025 Form 4 Insider Report for Mayville Engineering Company, Inc. (MEC)

Role
SVP, Corp. Development & GC
Signature
/s/ Russell E. Ryba, Attorney-in-Fact for Sean P. Leuba
Issuer symbol
MEC
Transactions as of
11 Aug 2025
Net transactions value
+$6,780
Form type
4
Filing time
11 Aug 2025, 18:01:44 UTC
Previous filing
18 Mar 2025
Next filing
09 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Leuba Sean P SVP, Corp. Development & GC 135 SOUTH 84TH STREET, SUITE 300, MILWAUKEE /s/ Russell E. Ryba, Attorney-in-Fact for Sean P. Leuba 11 Aug 2025 0001962754

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MEC Common Stock Purchase $6,780 +500 +25% $13.56 2,500 11 Aug 2025 by ESOP and/or 401(k) Plan F1
holding MEC Common Stock 18,539 11 Aug 2025 Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding MEC Restricted Stock Units 14,526 11 Aug 2025 Common Stock 14,526 $0.000000 Direct F2
holding MEC Restricted Stock Units 13,938 11 Aug 2025 Common Stock 13,938 $0.000000 Direct F3
holding MEC Stock Option (right to buy) 21,552 11 Aug 2025 Common Stock 21,552 $16.22 Direct F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Reflects the most recent ESOP and 401(k) balance.
F2 The restricted stock units will vest 1/3 on each of March 15, 2025, 2026 and 2027.
F3 The restricted stock units will vest 1/3 on each of March 15, 2026, 2027 and 2028.
F4 The options will vest 50% on each of February 28, 2024 and February 28, 2025.