Jagadeesh A. Reddy - 12 Mar 2025 Form 4 Insider Report for Mayville Engineering Company, Inc. (MEC)

Role: President & CEO, Director
Signature: /s/ Russell E. Ryba, Attorney-in-Fact for Jagadeesh A. Reddy
Issuer symbol: MEC
Transactions as of: 12 Mar 2025
Net transactions value: +$5,225
Form type: 4
Filing time: 13 Mar 2025, 16:41:05 UTC
Previous filing: 04 Mar 2025
Next filing: 18 Mar 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MEC	Common Stock	Purchase	$5,225	+380		$13.75	380	12 Mar 2025	By Daughter
holding	MEC	Common Stock						102,531	12 Mar 2025	Direct
holding	MEC	Common Stock						2,300	12 Mar 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	Restricted Stock Units						32,051	12 Mar 2025	Common Shares	32,051	$0.000000	Direct	F2
holding	MEC	Restricted Stock Units						108,950	12 Mar 2025	Common Shares	108,950	$0.000000	Direct	F3
holding	MEC	Stock Option (right to buy)						88,901	12 Mar 2025	Common Shares	88,901	$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 July 19, 2023, 2024 and 2025.
F3	The restricted stock units will vest 1/3 on each of March 15, 2025, 2026 and 2027.
F4	The options will vest 50% on each of February 28, 2024 and February 28, 2025.