Amphastar Pharmaceuticals, Inc.

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP AMPH

Report date

12/31/2025

Quarter

2025 Q4

Filed

2/13/2026

Shares

559,426

Value ($000)

14,981

Weight

0.0%

2019 Q4 - 2025 Q4 (16 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2025 Q4	2/13/2026	14,981	0.0%	559,426	12/31/2025
2025 Q3	11/13/2025	10,455	0.0%	392,310	9/30/2025
2025 Q2	8/13/2025	1,865	0.0%	81,239	6/30/2025
2024 Q1	5/15/2024	990	0.0%	22,539	3/31/2024
2023 Q3	11/14/2023	1,298	0.0%	28,230	9/30/2023
2023 Q2	8/14/2023	1,672	0.0%	29,099	6/30/2023
2023 Q1	5/15/2023	2,785	0.0%	74,274	3/31/2023
2022 Q4	2/14/2023	4,652	0.0%	166,040	12/31/2022
2022 Q3	11/14/2022	5,650	0.0%	201,065	9/30/2022
2022 Q2	8/15/2022	10,600	0.0%	304,672	6/30/2022
2022 Q1	5/13/2022	14,058	0.0%	391,585	3/31/2022
2021 Q4	2/14/2022	9,690	0.0%	416,049	12/31/2021
2021 Q3	11/12/2021	3,773	0.0%	198,472	9/30/2021
2021 Q2	8/13/2021	2,942	0.0%	145,918	6/30/2021
2021 Q1	5/14/2021	1,024	0.0%	55,869	3/31/2021
2019 Q4	2/13/2020	10,050	0.0%	520,984	12/31/2019