0001969223-23-000289.txt : 20230815 0001969223-23-000289.hdr.sgml : 20230815 20230815141418 ACCESSION NUMBER: 0001969223-23-000289 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20230815 DATE AS OF CHANGE: 20230815 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: Amphastar Pharmaceuticals, Inc. CENTRAL INDEX KEY: 0001297184 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 330702205 FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 001-36509 FILM NUMBER: 231174391 BUSINESS ADDRESS: STREET 1: 11570 SIXTH STREET CITY: RANCHO CUCAMONGA STATE: CA ZIP: 91730 BUSINESS PHONE: 909-980-9484 MAIL ADDRESS: STREET 1: 11570 SIXTH STREET CITY: RANCHO CUCAMONGA STATE: CA ZIP: 91730 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: PRINS RICHARD K CENTRAL INDEX KEY: 0001047579 FILING VALUES: FORM TYPE: 144 144 1 primary_doc.xml 144 0001047579 XXXXXXXX LIVE 0001297184 Amphastar Pharmaceuticals, Inc. 001-36509 11570 6th St Rancho Cucamonga CA 91730 9099809484 Richard Prins Officer Common stock UBS Financial Services Inc

1000 Harbor Blvd 3rd Floor Weehawken NJ 07086

10000 540700 48270000 08/15/2023 NASDAQ Common stock 06/10/2023 RSU Vesting Issuer N 4163 06/10/2023 NA Common stock 06/07/2022 RSU Vesting Issuer N 5837 06/07/2022 NA N Richard Prins

590 Hedgerow Ln Charlottesville VA 22903

Common stock 05/15/2023 5000 217502 08/15/2023 /s/ UBS Financial Services Inc, as attorney-in-fact for Richard Prins