Amphastar Pharmaceuticals, Inc.

Historical 13F Holders

Symbol
AMPH
CUSIP
03209R103
All holders as of
Q2 2026
Type
Equity
Class
COM
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Each filer's latest filing for 03209R103 since 12/18/2024, largest first.

Filer % of Class Filed
Jack Y. Zhang 13G/A
24.8% 2/7/2025
Event 12/31/2024
BlackRock, Inc. 13G/A 11.5% 10/17/2025
Event 9/30/2025
Dimensional Fund Advisors LP 13G 5.2% 7/14/2026
Event 6/30/2026
Under 5%, checked the "5 percent or less" box, or amended by a later filing (1)
Vanguard Group Inc 13G/A 0% 3/26/2026
Event 3/13/2026

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 11 3.50 k $75.5 k
2026 Q2 218 29.1 M $608 M
2026 Q1 219 32.3 M $634 M
2025 Q4 242 35.0 M $937 M
2025 Q3 251 33.0 M $880 M
2025 Q2 251 33.3 M $766 M
2025 Q1 247 33.3 M $964 M
2024 Q4 268 35.2 M $1.31 B
2024 Q3 287 35.5 M $1.72 B
2024 Q2 278 35.0 M $1.40 B
2024 Q1 280 34.8 M $1.53 B
2023 Q4 287 34.1 M $2.11 B
2023 Q3 264 32.0 M $1.47 B
2023 Q2 251 31.4 M $1.80 B
2023 Q1 223 30.2 M $1.13 B
2022 Q4 221 30.5 M $856 M
2022 Q3 217 30.0 M $847 M
2022 Q2 233 30.6 M $1.07 B
2022 Q1 212 29.9 M $1.07 B
2021 Q4 170 29.2 M $681 M
2021 Q3 139 27.9 M $531 M
2021 Q2 146 27.3 M $550 M
2021 Q1 138 26.0 M $477 M
2020 Q4 134 27.8 M $559 M
2020 Q3 141 26.2 M $492 M
2020 Q2 139 26.3 M $591 M
2020 Q1 115 24.0 M $357 M
2019 Q4 122 25.1 M $483 M
2019 Q3 137 24.1 M $478 M
2019 Q2 139 22.4 M $473 M
2019 Q1 138 22.4 M $458 M
2018 Q4 139 23.1 M $461 M
2018 Q3 114 21.6 M $416 M
2018 Q2 116 20.2 M $308 M
2018 Q1 118 20.9 M $391 M
2017 Q4 110 20.7 M $397 M
2017 Q3 104 20.3 M $363 M
2017 Q2 109 20.4 M $365 M
2017 Q1 121 20.7 M $301 M
2016 Q4 140 22.5 M $415 M
2016 Q3 137 22.2 M $421 M
2016 Q2 105 16.2 M $261 M
2016 Q1 94 14.3 M $171 M
2015 Q4 96 14.7 M $210 M
2015 Q3 91 13.6 M $159 M
2015 Q2 86 13.3 M $234 M
2015 Q1 60 10.6 M $158 M
2014 Q4 56 7.95 M $92.3 M
2014 Q3 46 7.25 M $84.4 M
2014 Q2 2 300 k $3.00 M