Free Trial

Amphastar Pharmaceuticals (AMPH) SEC Filings & 10K Form

Amphastar Pharmaceuticals logo
$27.80 -0.49 (-1.73%)
Closing price 04/2/2025 04:00 PM Eastern
Extended Trading
$27.75 -0.05 (-0.18%)
As of 07:33 AM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.

Recent Amphastar Pharmaceuticals SEC Filings

DateFilerForm TypeView
04/02/2025
5:45 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2025
6:43 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2025
6:13 PM
Amphastar Pharmaceuticals (Issuer)
Luo Mary Z. (Reporting)
Zhang Jack Y. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2025
5:38 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2025
5:41 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/12/2025
3:53 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/12/2025
3:14 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/12/2025
3:16 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/10/2025
5:10 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/10/2025
4:29 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/06/2025
4:00 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
02/27/2025
3:33 PM
Amphastar Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
02/07/2025
6:21 PM
Amphastar Pharmaceuticals (Subject)
Zhang Jack Y. (Filed by)
Form SCHEDULE 13G/A
12/16/2024
4:22 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
12/11/2024
7:28 PM
Amphastar Pharmaceuticals (Issuer)
PRINS RICHARD K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
12/09/2024
10:37 AM
Amphastar Pharmaceuticals (Subject)
PRINS RICHARD K (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
11/13/2024
7:26 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
11/13/2024
5:55 PM
Amphastar Pharmaceuticals (Issuer)
PRINS RICHARD K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
11/12/2024
7:05 PM
Amphastar Pharmaceuticals (Issuer)
Luo Mary Z. (Reporting)
Zhang Jack Y. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
11/12/2024
12:29 PM
Amphastar Pharmaceuticals (Subject)
PRINS RICHARD K (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
11/12/2024
12:29 PM
Amphastar Pharmaceuticals (Subject)
Zhou Rong (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
11/08/2024
6:02 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
09/16/2024
6:09 PM
Amphastar Pharmaceuticals (Issuer)
Luo Mary Z. (Reporting)
Zhang Jack Y. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
09/06/2024
6:48 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
09/05/2024
3:48 PM
Amphastar Pharmaceuticals (Subject)
Petersen Floyd F. (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
08/30/2024
3:14 PM
Amphastar Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
08/27/2024
8:33 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
08/26/2024
4:26 PM
Amphastar Pharmaceuticals (Subject)
Zhou Rong (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
08/13/2024
4:58 PM
Amphastar Pharmaceuticals (Issuer)
PRINS RICHARD K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
08/12/2024
4:25 PM
Amphastar Pharmaceuticals (Subject)
PRINS RICHARD K (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
08/09/2024
3:15 PM
Amphastar Pharmaceuticals (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
08/07/2024
3:22 PM
Amphastar Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
08/02/2024
3:32 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
07/31/2024
4:24 PM
Amphastar Pharmaceuticals (Subject)
PETERS WILLIAM J (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
06/28/2024
3:26 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/27/2024
3:25 PM
Amphastar Pharmaceuticals (Subject)
PETERS WILLIAM J (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
06/11/2024
5:35 PM
Amphastar Pharmaceuticals (Issuer)
Luo Mary Z. (Reporting)
Zhang Jack Y. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/11/2024
5:32 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/10/2024
3:51 PM
Amphastar Pharmaceuticals (Subject)
Petersen Floyd F. (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
06/05/2024
7:10 PM
Amphastar Pharmaceuticals (Issuer)
Lee Howard (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/05/2024
5:54 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
Trump Allies Confirm Exec Order 14024 Triggers Dollar Collapse (Ad)

Executive Order 14024 is paving the way for irreversible damage to the dollar's value—threatening your wealth, your savings, and your retirement. When the dollar collapses, your savings could disappear overnight. With Trump threatening Russia with more sanctions, Russia is rushing to finalize their BRICS payment system aimed to destroy the U.S dollar.

Go Here to Learn What's Happening and How to Prepare >>
06/05/2024
5:56 PM
Amphastar Pharmaceuticals (Issuer)
Deflin Gayle (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/05/2024
6:03 PM
Amphastar Pharmaceuticals (Issuer)
Gerst Diane G. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/05/2024
4:56 PM
Amphastar Pharmaceuticals (Issuer)
ZASLOFF MICHAEL A (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/05/2024
4:58 PM
Amphastar Pharmaceuticals (Issuer)
PRINS RICHARD K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/05/2024
5:00 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/04/2024
3:14 PM
Amphastar Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/21/2024
5:26 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
05/02/2024
3:56 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
04/19/2024
3:21 PM
Amphastar Pharmaceuticals (Filer)
Form DEFA14A
04/12/2024
3:08 PM
Amphastar Pharmaceuticals (Filer)
Form DEF 14A
04/12/2024
3:08 PM
Amphastar Pharmaceuticals (Filer)
Form DEF 14A
04/12/2024
3:14 PM
Amphastar Pharmaceuticals (Filer)
Form DEFA14A
04/12/2024
3:14 PM
Amphastar Pharmaceuticals (Filer)
Form DEFA14A
(Data available from 1/1/2016 forward)

Remove Ads

Related Companies and Tools


This page (NASDAQ:AMPH) was last updated on 4/3/2025 by MarketBeat.com Staff
From Our Partners