0001104659-23-093905.txt : 20230821 0001104659-23-093905.hdr.sgml : 20230821 20230821160521 ACCESSION NUMBER: 0001104659-23-093905 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230818 FILED AS OF DATE: 20230821 DATE AS OF CHANGE: 20230821 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: PRINS RICHARD K CENTRAL INDEX KEY: 0001047579 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36509 FILM NUMBER: 231189145 ISSUER: 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 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 tm2324276-1_4seq1.xml OWNERSHIP DOCUMENT X0508 4 2023-08-18 0 0001297184 Amphastar Pharmaceuticals, Inc. AMPH 0001047579 PRINS RICHARD K C/O AMPHASTAR PHARMACEUTICALS, INC. 11570 6TH STREET RANCHO CUCAMONGA CA 91730 1 0 0 0 0 Common Stock 2023-08-18 4 S 0 2000 52.5028 D 40895 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $52.41 to $52.64, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. /s/ Eva Wen, by power of attorney 2023-08-21