AMPHASTAR PHARMACEUTICALS IN

Ticker: AMPH CUSIP: 03209R103 Class: Common Stock

Round Rock Advisors, LLC's Holding History (CIK: 0001846991)

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

Q4 2025

Shares 20,477 Value ($000) $548 Avg Close $25.76 Range $22.94 - $29.00

Q3 2025

Shares 8,580 Value ($000) $212 Avg Close $25.82 Range $20.39 - $31.26

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	20,477	$548	$25.76	$22.94 - $29.00
Q3 2025	8,580	$212	$25.82	$20.39 - $31.26