AMPHASTAR PHARMACEUTICALS IN

Ticker: AMPH CUSIP: 03209R103 Class: Common Stock

Boston Trust Walden Corp's Holding History (CIK: 0001534866)

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

Q4 2025

Shares 1,087,266 Value ($000) $29,117 Avg Close $25.76 Range $22.94 - $29.00

Q3 2025

Shares 1,173,107 Value ($000) $31,263 Avg Close $25.82 Range $20.39 - $31.26

Q2 2025

Shares 1,176,453 Value ($000) $27,011 Avg Close $24.82 Range $22.64 - $29.27

Q1 2025

Shares 1,215,624 Value ($000) $35,241 Avg Close $31.94 Range $25.89 - $39.01

Q4 2024

Shares 978,920 Value ($000) $36,347 Avg Close $45.73 Range $36.48 - $53.96

Q3 2024

Shares 539,639 Value ($000) $26,189 Avg Close $43.89 Range $36.56 - $50.62

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,087,266	$29,117	$25.76	$22.94 - $29.00
Q3 2025	1,173,107	$31,263	$25.82	$20.39 - $31.26
Q2 2025	1,176,453	$27,011	$24.82	$22.64 - $29.27
Q1 2025	1,215,624	$35,241	$31.94	$25.89 - $39.01
Q4 2024	978,920	$36,347	$45.73	$36.48 - $53.96
Q3 2024	539,639	$26,189	$43.89	$36.56 - $50.62