AMPHASTAR PHARMACEUTICALS IN

Ticker: AMPH CUSIP: 03209R103 Class: Common Stock

MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s Holding History (CIK: 0000912938)

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

Q1 2017

Shares 57,026 Value ($000) $827 Avg Close $15.72 Range $12.05 - $19.64

Q4 2016

Shares 56,348 Value ($000) $1,038 Avg Close $19.45 Range $16.87 - $21.75

Q3 2016

Shares 59,740 Value ($000) $1,133 Avg Close $18.15 Range $15.62 - $21.53

Q2 2016

Shares 45,886 Value ($000) $740 Avg Close $14.11 Range $11.41 - $16.78

Q1 2016

Shares 48,737 Value ($000) $585 Avg Close $11.79 Range $10.50 - $14.18

Q4 2015

Shares 50,637 Value ($000) $721 Avg Close $13.21 Range $10.57 - $15.84

Q3 2015

Shares 51,087 Value ($000) $597 Avg Close $15.00 Range $10.61 - $18.30

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2017	57,026	$827	$15.72	$12.05 - $19.64
Q4 2016	56,348	$1,038	$19.45	$16.87 - $21.75
Q3 2016	59,740	$1,133	$18.15	$15.62 - $21.53
Q2 2016	45,886	$740	$14.11	$11.41 - $16.78
Q1 2016	48,737	$585	$11.79	$10.50 - $14.18
Q4 2015	50,637	$721	$13.21	$10.57 - $15.84
Q3 2015	51,087	$597	$15.00	$10.61 - $18.30