REDDY JAGADEESH A (President & CEO) sold 0.9% of their position (1.30K shares) of MAYVILLE ENGINEERING COMPANY, INC. on the open market

Open‑market sale worth $45.5K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

REDDY JAGADEESH A

Filed: 6/10/2026ACC: 0000897069-26-001355

InsiderREDDY JAGADEESH ACIK 1937748

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IssuerMAYVILLE ENGINEERING COMPANY, INC.CIK 1766368

Officer· President & CEO

Since Jul 2022

-1.30K

Net shares

Net seller

$45.5K

Total sold

Open market trades

0B · 1S

Total transactions

1.30K disposed

Non-Derivative Transactions1

Common Stock

Direct

S · Sale

−1.30K

Price / share

$35.01

Trade value

$45.51K

% of position

0.9%

6/8/2026

141.09K→139.79K

Total

Net shares

−1.30K

Net value

-$45.51K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	6/8/2026	S · Sale	−1.30K	$35.01	$45.51K	0.9%	141.09K	139.79K
Total			−1.30K		-$45.51K

Derivative Transactions0

No derivative transactions reported

Non-Derivative Holdings (Post-Transaction)2

Common Stock

Indirect

Shares owned380.00

Common Stock

Indirect

Shares owned2.30K

Total

2.68K indirect2.68K

Security Title	Shares Owned	Ownership Type
Common Stock	380.00	Indirect
Common Stock	2.30K	Indirect
Total	2.68K	2.68K indirect

Derivative Holdings (Post-Transaction)4

Restricted Stock Units

Direct

Underlying security

Common Shares

Underlying shares

36.32K

Shares owned

36.32K

Exercise price

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Shares

Underlying shares

88.90K

Shares owned

88.90K

Exercise price

16.22

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Shares

Underlying shares

55.28K

Shares owned

55.28K

Exercise price

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Shares

Underlying shares

74.99K

Shares owned

74.99K

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

255.49K

Owned

255.49K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Restricted Stock Units Direct	Common Shares	0	—	—	36.32K	36.32K
Stock Option (right to buy) Direct	Common Shares	16.22	—	—	88.90K	88.90K
Restricted Stock Units Direct	Common Shares	0	—	—	55.28K	55.28K
Restricted Stock Units Direct	Common Shares	0	—	—	74.99K	74.99K
Total					255.49K	255.49K