BUTZ TODD M (Chief Financial Officer) exercised options at MAYVILLE ENGINEERING COMPANY, INC.

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 1 exercise

BUTZ TODD M

Filed: 3/4/2025ACC: 0000897069-25-000473

InsiderBUTZ TODD MCIK 1775975

→

IssuerMAYVILLE ENGINEERING COMPANY, INC.CIK 1766368

Officer· Chief Financial Officer

Since May 2019

-3.70K

Net shares

Net seller

$55.3K

Total sold

Open market trades

0B · 0S

Total transactions

11.56K acquired · 15.26K disposed

Non-Derivative Transactions2

Common Stock

Direct

M · Option Exercise

+11.56K

Price / share

—

Trade value

—

% of position

7.5%

2/28/2025

153.91K→165.47K

Common Stock

Direct

F · Tax Withholding

−3.70K

Price / share

$14.95

Trade value

$55.31K

% of position

2.2%

2/28/2025

165.47K→161.77K

Total

Net shares

+7.86K

Net value

-$55.31K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	2/28/2025	M · Option Exercise	+11.56K	—	—	7.5%	153.91K	165.47K
Common Stock Direct	2/28/2025	F · Tax Withholding	−3.70K	$14.95	$55.31K	2.2%	165.47K	161.77K
Total			+7.86K		-$55.31K

Derivative Transactions1

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

11.56K shares

−11.56K

Strike price

Held after

0.00

Exercisable

—

2/28/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Common Stock11.56K shares	2/28/2025	M · Option Exercise	−11.56K	0	—	0.00

Non-Derivative Holdings (Post-Transaction)1

Common Stock

Indirect

Shares owned41K

Total

41K indirect41K

Security Title	Shares Owned	Ownership Type
Common Stock	41K	Indirect
Total	41K	41K indirect

Derivative Holdings (Post-Transaction)5

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

39.13K

Shares owned

39.13K

Exercise price

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

39.68K

Shares owned

39.68K

Exercise price

14.01

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

40.41K

Shares owned

40.41K

Exercise price

16.22

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

52.84K

Shares owned

52.84K

Exercise price

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

69.96K

Shares owned

69.96K

Exercise price

10.32

Expiration

—

Exercise window

—

Total

Underlying

242.02K

Owned

242.02K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Stock Option (right to buy) Direct	Common Stock	17	—	—	39.13K	39.13K
Stock Option (right to buy) Direct	Common Stock	14.01	—	—	39.68K	39.68K
Stock Option (right to buy) Direct	Common Stock	16.22	—	—	40.41K	40.41K
Restricted Stock Units Direct	Common Stock	0	—	—	52.84K	52.84K
Stock Option (right to buy) Direct	Common Stock	10.32	—	—	69.96K	69.96K
Total					242.02K	242.02K