Sean P. Leuba - 09 Jan 2024 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: 09 Jan 2024
Net transactions value: -$27,000
Form type: 4
Filing time: 09 Jan 2024, 16:43:38 UTC
Previous filing: 02 Mar 2023
Next filing: 01 Mar 2024
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MEC	Common Stock	Options Exercise	$0	+5,783		$0.000000	5,783	09 Jan 2024	Direct
transaction	MEC	Common Stock	Tax liability	$27,000	-2,000	-35%	$13.50	3,783	09 Jan 2024	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
transaction	MEC	Restricted Stock Units	Options Exercise	$0	-5,783	-50%	$0.000000	5,783	09 Jan 2024	Common Shares	5,783	$0.000000	Direct	F1
holding	MEC	Restricted Stock Units						12,331	09 Jan 2024	Common Shares	12,331	$0.000000	Direct	F2
holding	MEC	Stock Option (right to buy)						21,552	09 Jan 2024	Common Shares	21,552	$16.22	Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The Restricted Stock Units will vest 50% on each of January 9, 2024 and January 9, 2025.
F2	The restricted stock units will vest 50% on each of February 28, 2024 and February 28, 2025.
F3	The options will vest 50% on each of February 28, 2024 and February 28, 2025.