AMPHASTAR PHARMACEUTICALS IN

Ticker: AMPH CUSIP: 03209R103 Class: Common Stock

Walleye Trading LLC's Holding History (CIK: 0001388391)

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

Q1 2017

Shares 13,400 Value ($000) $194 Avg Close $15.72 Range $12.05 - $19.64

Q3 2016

Shares 8,800 Value ($000) $167 Avg Close $18.15 Range $15.62 - $21.53

Q2 2016

Shares 300 Value ($000) $5 Avg Close $14.11 Range $11.41 - $16.78

Q4 2015

Shares 7,500 Value ($000) $107 Avg Close $13.21 Range $10.57 - $15.84

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2017	13,400	$194	$15.72	$12.05 - $19.64
Q3 2016	8,800	$167	$18.15	$15.62 - $21.53
Q2 2016	300	$5	$14.11	$11.41 - $16.78
Q4 2015	7,500	$107	$13.21	$10.57 - $15.84