FISHER STEVEN L exercised options at MAYVILLE ENGINEERING COMPANY, INC.

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

M · 4 exercises

FISHER STEVEN L

Filed: 4/23/2026ACC: 0000897069-26-000947

InsiderFISHER STEVEN LCIK 1342891

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IssuerMAYVILLE ENGINEERING COMPANY, INC.CIK 1766368

Director

Since May 2019

0.00

Net shares

Net seller

$0.00

Total acquired

Open market trades

0B · 0S

Total transactions

50.23K acquired · 50.23K disposed

Non-Derivative Transactions4

Common Stock

Direct

M · Option Exercise

+5.88K

Price / share

—

Trade value

—

% of position

19.3%

4/21/2026

30.48K→36.37K

Common Stock

Direct

M · Option Exercise

+19.53K

Price / share

—

Trade value

—

% of position

53.7%

4/21/2026

36.37K→55.90K

Common Stock

Direct

M · Option Exercise

+14.48K

Price / share

—

Trade value

—

% of position

25.9%

4/21/2026

55.90K→70.38K

Common Stock

Direct

M · Option Exercise

+10.33K

Price / share

—

Trade value

—

% of position

14.7%

4/21/2026

70.38K→80.71K

Total

Net shares

+50.23K

Net value

$0.00

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	4/21/2026	M · Option Exercise	+5.88K	—	—	19.3%	30.48K	36.37K
Common Stock Direct	4/21/2026	M · Option Exercise	+19.53K	—	—	53.7%	36.37K	55.90K
Common Stock Direct	4/21/2026	M · Option Exercise	+14.48K	—	—	25.9%	55.90K	70.38K
Common Stock Direct	4/21/2026	M · Option Exercise	+10.33K	—	—	14.7%	70.38K	80.71K
Total			+50.23K		$0.00

Derivative Transactions4

Director Deferred Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

5.88K shares

−5.88K

Strike price

Held after

34.02K

Exercisable

—

4/21/2026

Director Deferred Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

19.53K shares

−19.53K

Strike price

Held after

14.48K

Exercisable

—

4/21/2026

Director Deferred Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

14.48K shares

−14.48K

Strike price

Held after

0.00

Exercisable

—

4/21/2026

Director Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

10.33K shares

−10.33K

Strike price

Held after

0.00

Exercisable

—

4/21/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Director Deferred Stock Units Direct	Common Stock5.88K shares	4/21/2026	M · Option Exercise	−5.88K	—	34.02K
Director Deferred Stock Units Direct	Common Stock19.53K shares	4/21/2026	M · Option Exercise	−19.53K	—	14.48K
Director Deferred Stock Units Direct	Common Stock14.48K shares	4/21/2026	M · Option Exercise	−14.48K	—	0.00
Director Restricted Stock Units Direct	Common Stock10.33K shares	4/21/2026	M · Option Exercise	−10.33K	—	0.00