0001104659-24-036270.txt : 20240319 0001104659-24-036270.hdr.sgml : 20240319 20240319185531 ACCESSION NUMBER: 0001104659-24-036270 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20240315 FILED AS OF DATE: 20240319 DATE AS OF CHANGE: 20240319 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Luo Mary Z. CENTRAL INDEX KEY: 0001611156 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36509 FILM NUMBER: 24765658 MAIL ADDRESS: STREET 1: 11570 6TH STREET CITY: RANCHO CUCAMONGA STATE: CA ZIP: 91730 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Zhang Jack Y. CENTRAL INDEX KEY: 0001611157 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36509 FILM NUMBER: 24765659 MAIL ADDRESS: STREET 1: 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 tm249272-1_4seq1.xml OWNERSHIP DOCUMENT X0508 4 2024-03-15 0 0001297184 Amphastar Pharmaceuticals, Inc. AMPH 0001611157 Zhang Jack Y. C/O AMPHASTAR PHARMACEUTICALS, INC. 11570 6TH STREET RANCHO CUCAMONGA, CA 91730 1 1 1 0 CEO & Chief Scientific Officer 0001611156 Luo Mary Z. C/O AMPHASTAR PHARMACEUTICALS, INC. 11570 6TH STREET RANCHO CUCAMONGA CA 91730 1 1 1 0 COO,Chief Scientist & Chairman 0 Common Stock 2024-03-15 4 M 0 722046 12.46 A 2858043 D Common Stock 2024-03-15 4 F 0 408721 43.05 D 2449322 D Common Stock 2024-03-17 4 F 0 15768 43.05 D 2433554 D Common Stock 2024-03-15 4 M 0 310930 12.46 A 1439466 I See footnote Common Stock 2024-03-15 4 F 0 202658 43.05 D 1236808 I See footnote Common Stock 2024-03-17 4 F 0 7052 43.05 D 1229756 I See footnote Common Stock 6827679 I See footnote Employee Stock Option (right to buy) 12.46 2024-03-15 4 M 0 722046 0 D 2024-03-17 Common Stock 722046 0 D Employee Stock Option (right to buy) 12.46 2024-03-15 4 M 0 310930 0 D 2024-03-17 Common Stock 310930 0 I See footnote Consists of 399,187 shares withheld to pay the exercise price and withholding taxes incurred in connection with the exercise of 622,046 options and 9,534 shares withheld to satisfy the reporting person's tax liability in connection with the vesting of restricted stock units, or RSUs. The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of RSUs. The securities are held of record by Mary Z. Luo. The reporting persons are husband and wife. Consists of 198,640 shares withheld to pay the exercise price and withholding taxes incurred in connection with the option exercise and 4,018 shares withheld to satisfy the reporting person's tax liability in connection with the vesting of RSUs. The shares are held of record by Applied Physics & Chemistry Laboratories, Inc., of which the reporting persons and The Bill Luobei Zhang 2004 Irrevocable Trust are the sole owners. Shares subject to the option are fully vested and immediately exercisable. /s/ Eva Wen, by power of attorney for Jack Y. Zhang 2024-03-19 /s/ Eva Wen, by power of attorney for Mary Z. Luo 2024-03-19