0001415889-24-014009.txt : 20240521 0001415889-24-014009.hdr.sgml : 20240521 20240521182644 ACCESSION NUMBER: 0001415889-24-014009 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20240519 FILED AS OF DATE: 20240521 DATE AS OF CHANGE: 20240521 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: PETERS WILLIAM J CENTRAL INDEX KEY: 0001263136 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36509 FILM NUMBER: 24971144 MAIL ADDRESS: STREET 1: C/O AMPHASTAR PHARMACEUTICALS, INC. STREET 2: 11570 6TH STREET CITY: RANCHO CUCAMONGA STATE: CA ZIP: 91730 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Amphastar Pharmaceuticals, Inc. CENTRAL INDEX KEY: 0001297184 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences IRS NUMBER: 330702205 FISCAL YEAR END: 1231 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 4 1 form4-05212024_100536.xml X0508 4 2024-05-19 0001297184 Amphastar Pharmaceuticals, Inc. AMPH 0001263136 PETERS WILLIAM J C/O AMPHASTAR PHARMACEUTICALS, INC. 11570 6TH STREET RANCHO CUCAMONGA CA 91730 true true false false CFO, EVP & TREASURER 0 Common Stock 2024-05-19 4 F 0 387 43.48 D 97268 D The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of restricted stock units, or RSUs. /s/ William J. Peters 2024-05-21