LEHR RACHELE MARIE (Chief Human Resources Officer) exercised options at MAYVILLE ENGINEERING COMPANY, INC.

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

M · 2 exercises

LEHR RACHELE MARIE

Filed: 3/17/2026ACC: 0000897069-26-000705

InsiderLEHR RACHELE MARIECIK 1751718

→

IssuerMAYVILLE ENGINEERING COMPANY, INC.CIK 1766368

Officer· Chief Human Resources Officer

Since Mar 2023

+11.90K

Net shares

Net buyer

$76.7K

Total sold

Open market trades

0B · 0S

Total transactions

30.86K acquired · 18.97K disposed

Non-Derivative Transactions3

Common Stock

Direct

M · Option Exercise

+8.56K

Price / share

—

Trade value

—

% of position

41.2%

3/15/2026

20.76K→29.32K

Common Stock

Direct

M · Option Exercise

+5.81K

Price / share

—

Trade value

—

% of position

19.8%

3/15/2026

29.32K→35.13K

Common Stock

Direct

F · Tax Withholding

−4.60K

Price / share

$16.67

Trade value

$76.68K

% of position

13.1%

3/15/2026

35.13K→30.53K

Total

Net shares

+9.77K

Net value

-$76.68K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	3/15/2026	M · Option Exercise	+8.56K	—	—	41.2%	20.76K	29.32K
Common Stock Direct	3/15/2026	M · Option Exercise	+5.81K	—	—	19.8%	29.32K	35.13K
Common Stock Direct	3/15/2026	F · Tax Withholding	−4.60K	$16.67	$76.68K	13.1%	35.13K	30.53K
Total			+9.77K		-$76.68K

Derivative Transactions3

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

8.56K shares

−8.56K

Strike price

Held after

8.56K

Exercisable

—

3/15/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

5.81K shares

−5.81K

Strike price

Held after

11.61K

Exercisable

—

3/15/2026

Restricted Stock Units

Direct

A · Award

Converts to

Common Stock

16.50K shares

+16.50K

Strike price

Held after

16.50K

Exercisable

—

3/15/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Units Direct	Common Stock8.56K shares	3/15/2026	M · Option Exercise	−8.56K	—	8.56K
Restricted Stock Units Direct	Common Stock5.81K shares	3/15/2026	M · Option Exercise	−5.81K	—	11.61K
Restricted Stock Units Direct	Common Stock16.50K shares	3/15/2026	A · Award	+16.50K	—	16.50K

Non-Derivative Holdings (Post-Transaction)0

No non-derivative holdings reported

Derivative Holdings (Post-Transaction)1

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

24.81K

Shares owned

24.81K

Exercise price

14.12

Expiration

—

Exercise window

—

Total

Underlying

24.81K

Owned

24.81K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Stock Option (right to buy) Direct	Common Stock	14.12	—	—	24.81K	24.81K
Total					24.81K	24.81K