AMPHASTAR PHARMACEUTICALS IN

Ticker: AMPH CUSIP: 03209R103 Class: Common Stock

O'SHAUGHNESSY ASSET MANAGEMENT, LLC's Holding History (CIK: 0001423442)

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

Q4 2025

Shares 87,183 Value ($000) $2,335 Avg Close $25.76 Range $22.94 - $29.00

Q3 2025

Shares 69,058 Value ($000) $1,840 Avg Close $25.82 Range $20.39 - $31.26

Q2 2025

Shares 40,309 Value ($000) $925 Avg Close $24.82 Range $22.64 - $29.27

Q4 2023

Shares 4,228 Value ($000) $262 Avg Close $52.53 Range $43.79 - $63.67

Q4 2019

Shares 143 Value ($000) $3 Avg Close $19.18 Range $16.71 - $20.89

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	87,183	$2,335	$25.76	$22.94 - $29.00
Q3 2025	69,058	$1,840	$25.82	$20.39 - $31.26
Q2 2025	40,309	$925	$24.82	$22.64 - $29.27
Q4 2023	4,228	$262	$52.53	$43.79 - $63.67
Q4 2019	143	$3	$19.18	$16.71 - $20.89