AMPHASTAR PHARMACEUTICALS IN

Ticker: AMPH CUSIP: 03209R103 Class: Common Stock

Vanguard Personalized Indexing Management, LLC's Holding History (CIK: 0001767306)

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

Q4 2025

Shares 10,462 Value ($000) $280 Avg Close $25.76 Range $22.94 - $29.00

Q3 2025

Shares 11,004 Value ($000) $293 Avg Close $25.82 Range $20.39 - $31.26

Q2 2025

Shares 12,624 Value ($000) $290 Avg Close $24.82 Range $22.64 - $29.27

Q1 2025

Shares 7,769 Value ($000) $225 Avg Close $31.94 Range $25.89 - $39.01

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	10,462	$280	$25.76	$22.94 - $29.00
Q3 2025	11,004	$293	$25.82	$20.39 - $31.26
Q2 2025	12,624	$290	$24.82	$22.64 - $29.27
Q1 2025	7,769	$225	$31.94	$25.89 - $39.01