0001104659-23-123689.txt : 20231205 0001104659-23-123689.hdr.sgml : 20231205 20231205182504 ACCESSION NUMBER: 0001104659-23-123689 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20231201 FILED AS OF DATE: 20231205 DATE AS OF CHANGE: 20231205 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Zhou Rong CENTRAL INDEX KEY: 0001645326 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36509 FILM NUMBER: 231467969 MAIL ADDRESS: STREET 1: C/O AMPHASTAR PHARMACEUTICALS INC. STREET 2: 11570 SIXTH 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] 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 tm2332102-2_4seq1.xml OWNERSHIP DOCUMENT X0508 4 2023-12-01 0 0001297184 Amphastar Pharmaceuticals, Inc. AMPH 0001645326 Zhou Rong C/O AMPHASTAR PHARMACEUTICALS, INC. 11570 6TH STREET RANCHO CUCAMONGA, CA 91730 0 1 0 0 Senior EVP, Production Center 0 Common Stock 2023-12-01 4 M 0 4316 14.40 A 116736 D Common Stock 2023-12-01 4 S 0 4316 58.58 D 112420 D Common Stock 2023-12-04 4 M 0 3514 16.19 A 115934 D Common Stock 2023-12-04 4 S 0 3514 59.58 D 112420 D Common Stock 99668 I See footnote Common Stock 5000 I See footnote Employee Stock Option (right to buy) 14.40 2023-12-01 4 M 0 4316 0 D 2024-04-14 Common Stock 4316 0 D Employee Stock Option (right to buy) 16.19 2023-12-04 4 M 0 3514 0 D 2025-06-15 Common Stock 3514 0 D Includes 79 shares acquired under the Issuer's 2014 Employee Stock Purchase Plan on November 30, 2023. The shares are held of record by the Zhou Family Trust for which the reporting person serves as a trustee. The shares are held of record by the reporting person's spouse. Shares subject to the option are fully vested and immediately exercisable. /s/ Eva Wen, by power of attorney 2023-12-05