Randall P. Stille - Feb 28, 2023 Form 4 Insider Report for Mayville Engineering Company, Inc. (MEC)

Role
Chief Operating Officer
Signature
/s/ Russell E. Ryba, Attorney-in-Fact for Randall P. Stille
Stock symbol
MEC
Transactions as of
Feb 28, 2023
Transactions value $
$538,469
Form type
4
Date filed
3/2/2023, 05:53 PM
Previous filing
Mar 18, 2022

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MEC Common Stock Options Exercise $0 +25.5K +94.8% $0.00 52.3K Feb 28, 2023 Direct
transaction MEC Common Stock Tax liability -$117K -7.28K -13.92% $16.06 45.1K Feb 28, 2023 Direct
holding MEC Common Stock 2.33K Feb 28, 2023 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
transaction MEC Restricted Stock Units Options Exercise $0 -8.03K -100% $0.00* 0 Feb 28, 2023 Common Stock 8.03K $0.00 Direct F2
transaction MEC Restricted Stock Units Options Exercise $0 -17.4K -50% $0.00 17.4K Feb 28, 2023 Common Stock 17.4K $0.00 Direct F3
transaction MEC Restricted Stock Units Award $0 +23.1K $0.00 23.1K Feb 28, 2023 Common Stock 23.1K $0.00 Direct F4
transaction MEC Stock Option (right to buy) Award $655K +40.4K $16.22 40.4K Feb 28, 2023 Common Stock 40.4K $16.22 Direct F5
holding MEC Stock Option (right to buy) 67.2K Feb 28, 2023 Common Stock 67.2K $10.32 Direct F6
holding MEC Stock Option (right to buy) 32.5K Feb 28, 2023 Common Stock 32.5K $14.01 Direct F7
holding MEC Stock Option (right to buy) 52.8K Feb 28, 2023 Common Stock 52.8K $7.12 Direct F8
* 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 50% on each of February 28, 2022 and February 28, 2023.
F3 The restricted stock units will vest 50% on each of February 28, 2023 and February 28, 2024
F4 The restricted stock units will vest 50% on each of February 28, 2024 and February 28, 2025.
F5 The options will vest 50% on each of February 28, 2024 and February 28, 2025.
F6 The options will vest 50% on each of February 28, 2023 and February 28, 2024.
F7 The options will vest 50% on each of February 28, 2022 and February 28, 2023.
F8 The options will vest 50% on each of February 27, 2021 and February 27, 2022.