Zhou Rong
Related Filers (1)
Other (2)
144
Friday, 11/17/2023
Filing for proposed sale of securities under Rule 144
144
Wednesday, 5/17/2023
Filing for proposed sale of securities under Rule 144
Ownership (48)
4
Tuesday, 12/5/2023
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 6/21/2023
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 6/20/2023
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 6/14/2023
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 5/19/2023
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Monday, 3/20/2023
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 3/17/2023
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 3/8/2023
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 3/18/2022
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Thursday, 3/17/2022
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 3/1/2022
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 2/9/2022
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 1/11/2022
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 11/12/2021
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 8/4/2021
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 7/27/2021
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Thursday, 7/22/2021
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Thursday, 6/10/2021
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Monday, 5/17/2021
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Thursday, 3/18/2021
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 3/17/2021
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 6/5/2020
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 3/18/2020
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 3/17/2020
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Monday, 6/17/2019
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 5/7/2019
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Thursday, 3/28/2019
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Monday, 3/18/2019
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Monday, 3/4/2019
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4/A
Monday, 3/4/2019
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Thursday, 2/7/2019
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Thursday, 12/6/2018
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 11/13/2018
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Monday, 6/18/2018
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 3/28/2018
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 3/20/2018
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 3/16/2018
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 6/16/2017
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 3/28/2017
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Monday, 3/20/2017
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 12/7/2016
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 6/17/2016
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 3/29/2016
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Monday, 3/21/2016
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Thursday, 12/17/2015
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 6/19/2015
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities
3
Wednesday, 6/17/2015
Amphastar Pharmaceuticals, Inc.: Initial statement of beneficial ownership of securities
4
Wednesday, 6/17/2015
Amphastar Pharmaceuticals, Inc.: Statement of changes in beneficial ownership of securities