Form 4/A for MEC Mayville Engineering Company, Inc.

Accepted 2026-06-03 17:10:21 ET · period of report 2026-06-01 · accession 0000897069-26-001316 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
AT	2026-06-03 17:10	2026-06-01	MEC	Reddy Jagadeesh A	Pres, CEO, Dir	S - Sale	$30.00	-17.3K	141.1K	-11%	-$518.8K

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-06-01	S	D	17,294	$30.00	141,093	D	—	—	(F1) The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2025. (F2) The Form 4 filed on June 2, 2026 reported the sale of 17,942 shares on June 1, 2026. This amended Form 4 is being filed to report that the reporting person actually sold 17,294 shares on June 1, 2026 and to correct the number of shares beneficially owned following the reported transaction. (F3) The price in Column 4 is a weighted average price. The prices actually received ranged from $30.00 to $30.01. The reporting person has provided to the issuer, and will provide to any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range for all transactions reported in this Form 4 utilizing a weighted average price. (F2) The Form 4 filed on June 2, 2026 reported the sale of 17,942 shares on June 1, 2026. This amended Form 4 is being filed to report that the reporting person actually sold 17,294 shares on June 1, 2026 and to correct the number of shares beneficially owned following the reported transaction.