Sean P. Leuba - 28 Feb 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: 28 Feb 2024
Net transactions value: -$21,618
Form type: 4
Filing time: 01 Mar 2024, 16:43:14 UTC
Previous filing: 09 Jan 2024
Next filing: 19 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	+6,166	+163%	$0.000000	9,949	28 Feb 2024	Direct
transaction	MEC	Common Stock	Tax liability	$21,618	-1,806	-18%	$11.97	8,143	28 Feb 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	-6,166	-50%	$0.000000	6,165	28 Feb 2024	Common Shares	6,166	$0.000000	Direct	F1
holding	MEC	Restricted Stock Units						5,783	28 Feb 2024	Common Shares	5,783	$0.000000	Direct	F2
holding	MEC	Stock Option (right to buy)						21,552	28 Feb 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 February 28, 2024 and February 28, 2025.
F2	The Restricted Stock Units will vest 50% on each of January 9, 2024 and January 9, 2025.
F3	The options will vest 50% on each of February 28, 2024 and February 28, 2025.