Amphastar Pharmaceuticals, Inc.

AMPH·NASDAQ·$20.37Share Price as of 11/2·$982MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/06/26 10-QQ1 ended 03/31/2605/07/26 10-KFY 202502/26/26 10-QQ3 ended 09/30/2511/06/25 10-QQ2 ended 06/30/2508/07/25

Disclosures

8-KCurrent report08/06/26 8-KCurrent report07/13/26 8-KCurrent report07/08/26 8-KCurrent report06/03/26 8-KCurrent report05/07/26

Prospectuses and Registrations

S-8Registration of securities for employees02/29/24 S-8Registration of securities for employees03/01/23 S-8Registration of securities for employees03/11/22 S-3Shelf registration11/09/21 S-8Registration of securities for employees03/15/21

Proxies

DEF 14ADefinitive proxy04/13/26 DEFA14AAdditional proxy materials04/13/26 DEF 14ADefinitive proxy04/14/25 DEFA14AAdditional proxy materials04/14/25 PRE 14APreliminary proxy04/02/25

Ownership

Form 4Insider transaction09/23/26 144Proposed sale of securities09/21/26 Form 4Insider transaction09/17/26 Form 4Insider transaction09/03/26 144Proposed sale of securities09/01/26

Other

ARSAnnual report to shareholders04/13/26 ARSAnnual report to shareholders04/14/25 ARSAnnual report to shareholders04/12/24 ARSAnnual report to shareholders04/14/23 EFFECTRequest for effectiveness11/19/21