AMPHASTAR PHARMACEUTICALS IN

Ticker: AMPH CUSIP: 03209R103 Class: Common Stock

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

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

Q4 2025

Shares 64 Value ($000) $2 Avg Close $25.76 Range $22.94 - $29.00

Q3 2025

Shares 146 Value ($000) $4 Avg Close $25.82 Range $20.39 - $31.26

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	64	$2	$25.76	$22.94 - $29.00
Q3 2025	146	$4	$25.82	$20.39 - $31.26