AMPHASTAR PHARMACEUTICALS IN

Ticker: AMPH CUSIP: 03209R103 Class: Common Stock

MARTINGALE ASSET MANAGEMENT L P's Holding History (CIK: 0000936944)

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

Q4 2025

Shares 12,400 Value ($000) $332 Avg Close $25.76 Range $22.94 - $29.00

Q3 2025

Shares 18,521 Value ($000) $494 Avg Close $25.82 Range $20.39 - $31.26

Q2 2025

Shares 24,542 Value ($000) $563 Avg Close $24.82 Range $22.64 - $29.27

Q1 2025

Shares 24,542 Value ($000) $711 Avg Close $31.94 Range $25.89 - $39.01

Q4 2024

Shares 40,205 Value ($000) $1,493 Avg Close $45.73 Range $36.48 - $53.96

Q3 2024

Shares 40,265 Value ($000) $1,954 Avg Close $43.89 Range $36.56 - $50.62

Q2 2024

Shares 39,265 Value ($000) $1,571 Avg Close $41.44 Range $38.43 - $46.62

Q1 2024

Shares 39,273 Value ($000) $1,724 Avg Close $51.65 Range $42.16 - $65.92

Q4 2023

Shares 39,273 Value ($000) $2,429 Avg Close $52.53 Range $43.79 - $63.67

Q3 2023

Shares 39,781 Value ($000) $1,830 Avg Close $54.55 Range $44.86 - $67.66

Q2 2023

Shares 41,563 Value ($000) $2,389 Avg Close $44.33 Range $35.62 - $58.70

Q1 2023

Shares 42,168 Value ($000) $1,581 Avg Close $32.78 Range $27.58 - $38.22

Q4 2022

Shares 46,148 Value ($000) $1,293 Avg Close $29.04 Range $26.76 - $31.64

Q3 2022

Shares 65,536 Value ($000) $1,842 Avg Close $32.65 Range $27.10 - $39.07

Q2 2022

Shares 74,574 Value ($000) $2,596 Avg Close $35.69 Range $28.64 - $44.46

Q1 2022

Shares 83,136 Value ($000) $2,986 Avg Close $28.36 Range $22.07 - $37.16

Q4 2021

Shares 102,002 Value ($000) $2,377 Avg Close $20.45 Range $18.12 - $23.85

Q3 2021

Shares 109,987 Value ($000) $2,092 Avg Close $19.59 Range $17.56 - $21.63

Q2 2021

Shares 49,417 Value ($000) $997 Avg Close $18.84 Range $16.91 - $20.94

Q1 2021

Shares 19,417 Value ($000) $357 Avg Close $18.59 Range $17.11 - $20.93

Q4 2020

Shares 19,717 Value ($000) $398 Avg Close $19.46 Range $17.51 - $21.38

Q3 2020

Shares 102,517 Value ($000) $1,923 Avg Close $20.14 Range $17.83 - $22.69

Q2 2020

Shares 212,830 Value ($000) $4,781 Avg Close $18.31 Range $14.00 - $22.50

Q1 2020

Shares 212,817 Value ($000) $3,159 Avg Close $17.40 Range $12.33 - $20.40

Q4 2019

Shares 209,638 Value ($000) $4,045 Avg Close $19.18 Range $16.71 - $20.89

Q3 2019

Shares 214,444 Value ($000) $4,254 Avg Close $20.83 Range $18.66 - $22.85

Q2 2019

Shares 200,738 Value ($000) $4,238 Avg Close $20.90 Range $18.60 - $23.06

Q1 2019

Shares 220,438 Value ($000) $4,505 Avg Close $22.40 Range $19.32 - $25.43

Q4 2018

Shares 203,746 Value ($000) $4,055 Avg Close $19.71 Range $17.71 - $22.74

Q3 2018

Shares 105,629 Value ($000) $2,033 Avg Close $17.82 Range $15.04 - $19.50

Q3 2016

Shares 72,903 Value ($000) $1,383 Avg Close $18.15 Range $15.62 - $21.53

Q2 2016

Shares 64,700 Value ($000) $1,043 Avg Close $14.11 Range $11.41 - $16.78

Q1 2016

Shares 90,225 Value ($000) $1,083 Avg Close $11.79 Range $10.50 - $14.18

Q4 2015

Shares 90,225 Value ($000) $1,284 Avg Close $13.21 Range $10.57 - $15.84

Q3 2015

Shares 91,822 Value ($000) $1,074 Avg Close $15.00 Range $10.61 - $18.30

Q2 2015

Shares 28,309 Value ($000) $498 Avg Close $15.59 Range $13.55 - $18.25

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	12,400	$332	$25.76	$22.94 - $29.00
Q3 2025	18,521	$494	$25.82	$20.39 - $31.26
Q2 2025	24,542	$563	$24.82	$22.64 - $29.27
Q1 2025	24,542	$711	$31.94	$25.89 - $39.01
Q4 2024	40,205	$1,493	$45.73	$36.48 - $53.96
Q3 2024	40,265	$1,954	$43.89	$36.56 - $50.62
Q2 2024	39,265	$1,571	$41.44	$38.43 - $46.62
Q1 2024	39,273	$1,724	$51.65	$42.16 - $65.92
Q4 2023	39,273	$2,429	$52.53	$43.79 - $63.67
Q3 2023	39,781	$1,830	$54.55	$44.86 - $67.66
Q2 2023	41,563	$2,389	$44.33	$35.62 - $58.70
Q1 2023	42,168	$1,581	$32.78	$27.58 - $38.22
Q4 2022	46,148	$1,293	$29.04	$26.76 - $31.64
Q3 2022	65,536	$1,842	$32.65	$27.10 - $39.07
Q2 2022	74,574	$2,596	$35.69	$28.64 - $44.46
Q1 2022	83,136	$2,986	$28.36	$22.07 - $37.16
Q4 2021	102,002	$2,377	$20.45	$18.12 - $23.85
Q3 2021	109,987	$2,092	$19.59	$17.56 - $21.63
Q2 2021	49,417	$997	$18.84	$16.91 - $20.94
Q1 2021	19,417	$357	$18.59	$17.11 - $20.93
Q4 2020	19,717	$398	$19.46	$17.51 - $21.38
Q3 2020	102,517	$1,923	$20.14	$17.83 - $22.69
Q2 2020	212,830	$4,781	$18.31	$14.00 - $22.50
Q1 2020	212,817	$3,159	$17.40	$12.33 - $20.40
Q4 2019	209,638	$4,045	$19.18	$16.71 - $20.89
Q3 2019	214,444	$4,254	$20.83	$18.66 - $22.85
Q2 2019	200,738	$4,238	$20.90	$18.60 - $23.06
Q1 2019	220,438	$4,505	$22.40	$19.32 - $25.43
Q4 2018	203,746	$4,055	$19.71	$17.71 - $22.74
Q3 2018	105,629	$2,033	$17.82	$15.04 - $19.50
Q3 2016	72,903	$1,383	$18.15	$15.62 - $21.53
Q2 2016	64,700	$1,043	$14.11	$11.41 - $16.78
Q1 2016	90,225	$1,083	$11.79	$10.50 - $14.18
Q4 2015	90,225	$1,284	$13.21	$10.57 - $15.84
Q3 2015	91,822	$1,074	$15.00	$10.61 - $18.30
Q2 2015	28,309	$498	$15.59	$13.55 - $18.25