Ryan F. Raber - 25 Nov 2025 Form 4 Insider Report for Mayville Engineering Company, Inc. (MEC)

Role
EVP - Strategy, Sales & Mktg
Signature
/s/ Russell E. Ryba, Attorney-in-Fact for Ryan F. Raber
Issuer symbol
MEC
Transactions as of
25 Nov 2025
Net transactions value
-$250,188
Form type
4
Filing time
26 Nov 2025, 16:23:17 UTC
Previous filing
18 Mar 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Raber Ryan F EVP - Strategy, Sales & Mktg 135 SOUTH 84TH STREET, SUITE 300, MILWAUKEE /s/ Russell E. Ryba, Attorney-in-Fact for Ryan F. Raber 26 Nov 2025 0001775978

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MEC Common Stock Sale $208,625 -12,500 -12% $16.69 93,518 25 Nov 2025 Direct
transaction MEC Common Stock Sale $41,562 -2,500 -2.7% $16.62 91,018 25 Nov 2025 Direct
holding MEC Common Stock 26,287 25 Nov 2025 by ESOP and/or 401(k) Plan F1

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 Stock Option (right to buy) 27,595 25 Nov 2025 Common Stock 27,595 $17.00 Direct F2
holding MEC Stock Option (right to buy) 43,291 25 Nov 2025 Common Stock 43,291 $14.01 Direct F3
holding MEC Stock Option (right to buy) 77,426 25 Nov 2025 Common Stock 77,426 $10.32 Direct F4
holding MEC Stock Option (right to buy) 44,720 25 Nov 2025 Common Stock 44,720 $16.22 Direct F5
holding MEC Restricted Stock Units 35,300 25 Nov 2025 Common Stock 35,300 $0.000000 Direct F6
holding MEC Restricted Stock Units 37,353 25 Nov 2025 Common Stock 37,353 $0.000000 Direct F7
* 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 options will vest 50% on each of May 8, 2020 and May 8, 2021.
F3 The options will vest 50% on each of February 28, 2022 and February 28, 2023.
F4 The options will vest 50% on each of February 28, 2023 and February 28, 2024.
F5 The options will vest 50% on each of February 28, 2024 and February 28, 2025.
F6 The restricted stock units will vest 1/3 on each of March 15, 2025, 2026 and 2027.
F7 The restricted stock units will vest 1/3 on each of March 15, 2026, 2027 and 2028.