Legal Insider Trading Data | Free and Professional Subscription Services | Insider Insights urn:uuid:44dc5070-ddad-005f-702e-d63c7b5544f5 2026-09-14T20:39:07-04:00 Jonathan Moreland Profit from legal insider trading. InsiderInsights.com provides free insider trading data tools and resources, and professional grade subscription based real time Form 4 data, analysis and services AMPH: ZHOU RONG (VP) Sold (S) 3,187 Shares of AMPHASTAR PHARMACEUTICALS INC for $23.63 on 9/2 urn:uuid:f490f514-d09f-f326-ad36-bd4e3c541c4c 2026-09-03T19:42:05-04:00 AMPH: PRINS RICHARD K (DIR) Sold (S) 7,973 Shares of AMPHASTAR PHARMACEUTICALS INC for $20.30 on 8/11 urn:uuid:0eb13e16-1142-4f2c-4e3b-5fb0d82c1fbc 2026-08-12T18:14:55-04:00 AMPH: PETERS WILLIAM J (CFO,VP,TR,DIR) Exercised 5,053 Options (OE) of AMPHASTAR PHARMACEUTICALS INC for $19.79 on 8/7, and Sold Them All urn:uuid:cf95b90e-a893-c9b5-5331-303cc6c44d27 2026-08-11T16:57:01-04:00 AMPH: PIERCE ANTHONY T (DIR) Acquired (JB) 7,886 Shares of AMPHASTAR PHARMACEUTICALS INC for $0.00 on 7/9 urn:uuid:6506dcfd-7959-43d3-abbe-3536bd60150e 2026-07-13T19:38:01-04:00 AMPH: PIERCE ANTHONY T (DIR) Filed a Form 3, Becoming a Registered Insider at AMPHASTAR PHARMACEUTICALS INC With Initial Holdings of 0 urn:uuid:cbb89d3d-bc73-44e9-0fd8-bbc3a236204b 2026-07-13T19:36:13-04:00 AMPH: PRINS RICHARD K (DIR) Acquired (JB) 8,143 Shares of AMPHASTAR PHARMACEUTICALS INC for $0.00 on 6/1 urn:uuid:e4ec0d14-65e8-474a-c72b-005da7b8cd27 2026-06-03T21:22:11-04:00 AMPH: PRINS RICHARD K (DIR) Disposed (JS) 1,500 Shares of AMPHASTAR PHARMACEUTICALS INC for $0.00 on 8/19 urn:uuid:b7ffd222-7fc5-9128-90d4-cb29dd59fff1 2026-06-03T21:22:11-04:00 AMPH: LEE HOWARD (DIR) Acquired (JB) 8,143 Shares of AMPHASTAR PHARMACEUTICALS INC for $0.00 on 6/1 urn:uuid:3cd53449-7fc7-fea4-3928-ee23b3f060aa 2026-06-03T21:20:03-04:00 AMPH: LEE HOWARD (DIR) Disposed (JS) 769 Shares of AMPHASTAR PHARMACEUTICALS INC for $18.45 on 6/2 urn:uuid:b4a009cb-cefe-6a97-9261-85ae76ec71ca 2026-06-03T21:20:03-04:00