MAYVILLE ENGR CO INC

Ticker: MEC CUSIP: 578605107 Class: Common Stock

Optiver Holding B.V.'s Holding History (CIK: 0001859606)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 236 Value ($000) $4 Avg Close $16.31 Range $12.25 - $19.77

Q3 2025

Shares 236 Value ($000) $3 Avg Close $15.04 Range $12.10 - $17.62

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	236	$4	$16.31	$12.25 - $19.77
Q3 2025	236	$3	$15.04	$12.10 - $17.62