AMPHASTAR PHARMACEUTICALS IN

Ticker: AMPH CUSIP: 03209R103 Class: Common Stock

RHUMBLINE ADVISERS's Holding History (CIK: 0001115418)

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

Q4 2025

Shares 82,390 Value ($000) $2,206 Avg Close $25.76 Range $22.94 - $29.00

Q3 2025

Shares 90,129 Value ($000) $2,402 Avg Close $25.82 Range $20.39 - $31.26

Q2 2025

Shares 95,287 Value ($000) $2,188 Avg Close $24.82 Range $22.64 - $29.27

Q1 2025

Shares 88,958 Value ($000) $2,579 Avg Close $31.94 Range $25.89 - $39.01

Q4 2024

Shares 87,327 Value ($000) $3,242 Avg Close $45.73 Range $36.48 - $53.96

Q3 2024

Shares 86,114 Value ($000) $4,179 Avg Close $43.89 Range $36.56 - $50.62

Q2 2024

Shares 90,587 Value ($000) $3,623 Avg Close $41.44 Range $38.43 - $46.62

Q1 2024

Shares 89,193 Value ($000) $3,916 Avg Close $51.65 Range $42.16 - $65.92

Q4 2023

Shares 93,740 Value ($000) $5,798 Avg Close $52.53 Range $43.79 - $63.67

Q3 2023

Shares 93,512 Value ($000) $4,301 Avg Close $54.55 Range $44.86 - $67.66

Q2 2023

Shares 90,953 Value ($000) $5,227 Avg Close $44.33 Range $35.62 - $58.70

Q1 2023

Shares 90,967 Value ($000) $3 Avg Close $32.78 Range $27.58 - $38.22

Q4 2022

Shares 84,358 Value ($000) $2 Avg Close $29.04 Range $26.76 - $31.64

Q3 2022

Shares 84,586 Value ($000) $2,377 Avg Close $32.65 Range $27.10 - $39.07

Q2 2022

Shares 79,187 Value ($000) $2,755 Avg Close $35.69 Range $28.64 - $44.46

Q1 2022

Shares 79,995 Value ($000) $2,872 Avg Close $28.36 Range $22.07 - $37.16

Q4 2021

Shares 77,976 Value ($000) $1,816 Avg Close $20.45 Range $18.12 - $23.85

Q3 2021

Shares 78,426 Value ($000) $1,491 Avg Close $19.59 Range $17.56 - $21.63

Q2 2021

Shares 91,326 Value ($000) $1,841 Avg Close $18.84 Range $16.91 - $20.94

Q1 2021

Shares 84,256 Value ($000) $1,544 Avg Close $18.59 Range $17.11 - $20.93

Q4 2020

Shares 82,581 Value ($000) $1,661 Avg Close $19.46 Range $17.51 - $21.38

Q3 2020

Shares 82,582 Value ($000) $1,548 Avg Close $20.14 Range $17.83 - $22.69

Q2 2020

Shares 87,632 Value ($000) $1,968 Avg Close $18.31 Range $14.00 - $22.50

Q1 2020

Shares 93,359 Value ($000) $1,385 Avg Close $17.40 Range $12.33 - $20.40

Q4 2019

Shares 114,510 Value ($000) $2,209 Avg Close $19.18 Range $16.71 - $20.89

Q3 2019

Shares 108,931 Value ($000) $2,160 Avg Close $20.83 Range $18.66 - $22.85

Q2 2019

Shares 107,573 Value ($000) $2,271 Avg Close $20.90 Range $18.60 - $23.06

Q1 2019

Shares 106,120 Value ($000) $2,168 Avg Close $22.40 Range $19.32 - $25.43

Q4 2018

Shares 103,943 Value ($000) $2,068 Avg Close $19.71 Range $17.71 - $22.74

Q3 2018

Shares 87,863 Value ($000) $1,690 Avg Close $17.82 Range $15.04 - $19.50

Q2 2018

Shares 89,343 Value ($000) $1,363 Avg Close $17.48 Range $14.40 - $19.94

Q1 2018

Shares 83,152 Value ($000) $1,559 Avg Close $18.80 Range $16.76 - $20.45

Q4 2017

Shares 80,688 Value ($000) $1,552 Avg Close $18.67 Range $17.00 - $19.95

Q3 2017

Shares 71,233 Value ($000) $1,273 Avg Close $16.45 Range $14.53 - $18.67

Q2 2017

Shares 69,763 Value ($000) $1,246 Avg Close $15.86 Range $13.15 - $17.95

Q1 2017

Shares 67,838 Value ($000) $984 Avg Close $15.72 Range $12.05 - $19.64

Q4 2016

Shares 47,074 Value ($000) $867 Avg Close $19.45 Range $16.87 - $21.75

Q3 2016

Shares 44,003 Value ($000) $835 Avg Close $18.15 Range $15.62 - $21.53

Q2 2016

Shares 34,563 Value ($000) $557 Avg Close $14.11 Range $11.41 - $16.78

Q1 2016

Shares 36,285 Value ($000) $435 Avg Close $11.79 Range $10.50 - $14.18

Q4 2015

Shares 34,790 Value ($000) $495 Avg Close $13.21 Range $10.57 - $15.84

Q3 2015

Shares 32,405 Value ($000) $379 Avg Close $15.00 Range $10.61 - $18.30

Q2 2015

Shares 30,680 Value ($000) $539 Avg Close $15.59 Range $13.55 - $18.25

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	82,390	$2,206	$25.76	$22.94 - $29.00
Q3 2025	90,129	$2,402	$25.82	$20.39 - $31.26
Q2 2025	95,287	$2,188	$24.82	$22.64 - $29.27
Q1 2025	88,958	$2,579	$31.94	$25.89 - $39.01
Q4 2024	87,327	$3,242	$45.73	$36.48 - $53.96
Q3 2024	86,114	$4,179	$43.89	$36.56 - $50.62
Q2 2024	90,587	$3,623	$41.44	$38.43 - $46.62
Q1 2024	89,193	$3,916	$51.65	$42.16 - $65.92
Q4 2023	93,740	$5,798	$52.53	$43.79 - $63.67
Q3 2023	93,512	$4,301	$54.55	$44.86 - $67.66
Q2 2023	90,953	$5,227	$44.33	$35.62 - $58.70
Q1 2023	90,967	$3	$32.78	$27.58 - $38.22
Q4 2022	84,358	$2	$29.04	$26.76 - $31.64
Q3 2022	84,586	$2,377	$32.65	$27.10 - $39.07
Q2 2022	79,187	$2,755	$35.69	$28.64 - $44.46
Q1 2022	79,995	$2,872	$28.36	$22.07 - $37.16
Q4 2021	77,976	$1,816	$20.45	$18.12 - $23.85
Q3 2021	78,426	$1,491	$19.59	$17.56 - $21.63
Q2 2021	91,326	$1,841	$18.84	$16.91 - $20.94
Q1 2021	84,256	$1,544	$18.59	$17.11 - $20.93
Q4 2020	82,581	$1,661	$19.46	$17.51 - $21.38
Q3 2020	82,582	$1,548	$20.14	$17.83 - $22.69
Q2 2020	87,632	$1,968	$18.31	$14.00 - $22.50
Q1 2020	93,359	$1,385	$17.40	$12.33 - $20.40
Q4 2019	114,510	$2,209	$19.18	$16.71 - $20.89
Q3 2019	108,931	$2,160	$20.83	$18.66 - $22.85
Q2 2019	107,573	$2,271	$20.90	$18.60 - $23.06
Q1 2019	106,120	$2,168	$22.40	$19.32 - $25.43
Q4 2018	103,943	$2,068	$19.71	$17.71 - $22.74
Q3 2018	87,863	$1,690	$17.82	$15.04 - $19.50
Q2 2018	89,343	$1,363	$17.48	$14.40 - $19.94
Q1 2018	83,152	$1,559	$18.80	$16.76 - $20.45
Q4 2017	80,688	$1,552	$18.67	$17.00 - $19.95
Q3 2017	71,233	$1,273	$16.45	$14.53 - $18.67
Q2 2017	69,763	$1,246	$15.86	$13.15 - $17.95
Q1 2017	67,838	$984	$15.72	$12.05 - $19.64
Q4 2016	47,074	$867	$19.45	$16.87 - $21.75
Q3 2016	44,003	$835	$18.15	$15.62 - $21.53
Q2 2016	34,563	$557	$14.11	$11.41 - $16.78
Q1 2016	36,285	$435	$11.79	$10.50 - $14.18
Q4 2015	34,790	$495	$13.21	$10.57 - $15.84
Q3 2015	32,405	$379	$15.00	$10.61 - $18.30
Q2 2015	30,680	$539	$15.59	$13.55 - $18.25