AMPHASTAR PHARMACEUTICALS IN

Ticker: AMPH CUSIP: 03209R103 Class: Common Stock

MASON STREET ADVISORS, LLC's Holding History (CIK: 0001167711)

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

Q4 2020
Shares 13,640 Value ($000) $274 Avg Close $19.46 Range $17.51 - $21.38
Q3 2020
Shares 13,718 Value ($000) $257 Avg Close $20.14 Range $17.83 - $22.69
Q2 2020
Shares 12,661 Value ($000) $284 Avg Close $18.31 Range $14.00 - $22.50
Q1 2020
Shares 11,935 Value ($000) $177 Avg Close $17.40 Range $12.33 - $20.40
Q4 2019
Shares 11,935 Value ($000) $230 Avg Close $19.18 Range $16.71 - $20.89
Q3 2019
Shares 11,706 Value ($000) $232 Avg Close $20.83 Range $18.66 - $22.85
Q2 2019
Shares 11,783 Value ($000) $249 Avg Close $20.90 Range $18.60 - $23.06
Q1 2019
Shares 11,103 Value ($000) $227 Avg Close $22.40 Range $19.32 - $25.43
Q4 2018
Shares 10,737 Value ($000) $214 Avg Close $19.71 Range $17.71 - $22.74
Q3 2018
Shares 10,279 Value ($000) $198 Avg Close $17.82 Range $15.04 - $19.50
Q2 2018
Shares 10,365 Value ($000) $158 Avg Close $17.48 Range $14.40 - $19.94
Q1 2018
Shares 9,821 Value ($000) $184 Avg Close $18.80 Range $16.76 - $20.45
Q4 2017
Shares 9,208 Value ($000) $177 Avg Close $18.67 Range $17.00 - $19.95
Q3 2017
Shares 9,009 Value ($000) $161 Avg Close $16.45 Range $14.53 - $18.67
Q2 2017
Shares 8,798 Value ($000) $157 Avg Close $15.86 Range $13.15 - $17.95
Q1 2017
Shares 8,394 Value ($000) $122 Avg Close $15.72 Range $12.05 - $19.64
Q4 2016
Shares 7,845 Value ($000) $145 Avg Close $19.45 Range $16.87 - $21.75