AMPHASTAR PHARMACEUTICALS IN

Ticker: AMPH CUSIP: 03209R103 Class: Common Stock

MACKAY SHIELDS LLC's Holding History (CIK: 0000061227)

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

Q1 2021

Shares 101,200 Value ($000) $1,854 Avg Close $18.59 Range $17.11 - $20.93

Q4 2020

Shares 115,600 Value ($000) $2,324 Avg Close $19.46 Range $17.51 - $21.38

Q3 2020

Shares 116,800 Value ($000) $2,190 Avg Close $20.14 Range $17.83 - $22.69

Q2 2020

Shares 29,900 Value ($000) $672 Avg Close $18.31 Range $14.00 - $22.50

Q4 2019

Shares 179,478 Value ($000) $3,463 Avg Close $19.18 Range $16.71 - $20.89

Q3 2019

Shares 165,378 Value ($000) $3,279 Avg Close $20.83 Range $18.66 - $22.85

Q2 2019

Shares 181,378 Value ($000) $3,829 Avg Close $20.90 Range $18.60 - $23.06

Q1 2019

Shares 64,842 Value ($000) $1,324 Avg Close $22.40 Range $19.32 - $25.43

Q4 2018

Shares 83,042 Value ($000) $1,653 Avg Close $19.71 Range $17.71 - $22.74

Q3 2018

Shares 205,100 Value ($000) $3,946 Avg Close $17.82 Range $15.04 - $19.50

Q2 2018

Shares 234,500 Value ($000) $3,578 Avg Close $17.48 Range $14.40 - $19.94

Q1 2018

Shares 229,000 Value ($000) $4,294 Avg Close $18.80 Range $16.76 - $20.45

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	101,200	$1,854	$18.59	$17.11 - $20.93
Q4 2020	115,600	$2,324	$19.46	$17.51 - $21.38
Q3 2020	116,800	$2,190	$20.14	$17.83 - $22.69
Q2 2020	29,900	$672	$18.31	$14.00 - $22.50
Q4 2019	179,478	$3,463	$19.18	$16.71 - $20.89
Q3 2019	165,378	$3,279	$20.83	$18.66 - $22.85
Q2 2019	181,378	$3,829	$20.90	$18.60 - $23.06
Q1 2019	64,842	$1,324	$22.40	$19.32 - $25.43
Q4 2018	83,042	$1,653	$19.71	$17.71 - $22.74
Q3 2018	205,100	$3,946	$17.82	$15.04 - $19.50
Q2 2018	234,500	$3,578	$17.48	$14.40 - $19.94
Q1 2018	229,000	$4,294	$18.80	$16.76 - $20.45