MERCANTILE BANK CORP

Ticker: MBWM CUSIP: 587376104 Class: Common Stock

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

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

Q4 2025

Shares 120 Value ($000) $6 Avg Close $45.87 Range $42.41 - $50.41

Q3 2025

Shares 94 Value ($000) $4 Avg Close $46.86 Range $43.03 - $49.73

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	120	$6	$45.87	$42.41 - $50.41
Q3 2025	94	$4	$46.86	$43.03 - $49.73