Free Trial
Tada emoji MarketBeat All Access — Now Just $5.00 for 5 Weeks

Amphastar Pharmaceuticals (AMPH) SEC Filings & 10K Form

Amphastar Pharmaceuticals logo
$30.12 +0.30 (+0.99%)
As of 03:16 PM Eastern
This is a fair market value price provided by Polygon.io. Learn more.
Compare

Recent Amphastar Pharmaceuticals SEC Filings

Export to Excel
DateFilerForm TypeView
08/12/2025
5:10 AM		Amphastar Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
08/07/2025
3:43 PM		Amphastar Pharmaceuticals (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
08/04/2025
6:17 PM		Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
07/03/2025
4:30 PM		Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/16/2025
4:19 PM		Amphastar Pharmaceuticals (Issuer)
Luo Mary Z. (Reporting)
Zhang Jack Y. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/04/2025
7:04 PM		Amphastar Pharmaceuticals (Issuer)
Lee Howard (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/04/2025
6:45 PM		Amphastar Pharmaceuticals (Issuer)
Deflin Gayle (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/04/2025
6:02 PM		Amphastar Pharmaceuticals (Issuer)
Gerst Diane G. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/04/2025
5:30 PM		Amphastar Pharmaceuticals (Issuer)
ZASLOFF MICHAEL A (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/04/2025
5:39 PM		Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/04/2025
5:40 PM		Amphastar Pharmaceuticals (Issuer)
PRINS RICHARD K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
05/07/2025
3:23 PM		Amphastar Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/02/2025
7:27 PM		Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
04/14/2025
3:07 PM		Amphastar Pharmaceuticals (Filer)
Form DEF 14A
04/14/2025
3:11 PM		Amphastar Pharmaceuticals (Filer)
Form DEFA14A
04/14/2025
3:18 PM		Amphastar Pharmaceuticals (Filer)
Form ARS
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  
Cover all your expenses with just $118,000 invested? (Ad)

Generate up to $5,000/month with 10X less money? That's what every financial advisor tells you. But I just discovered a new way to do it with 10X less money.

Start collecting this income (next payout coming soon)
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  
(Data available from 1/1/2016 forward)


Related Companies and Tools

Related Companies
SEC Filings Tools

This page (NASDAQ:AMPH) was last updated on 8/18/2025 by MarketBeat.com Staff
From Our Partners
"AI Upgrade" Coming Sept. 1st
A new “AI Upgrade” is rolling out on September 1st—and tech leaders are calling it transformational. Softbank’...
Behind the Markets | Sponsored
When the levee breaks
The U.S. Treasury just confirmed it plans to borrow $1.01 trillion this quarter—nearly double what was project...
Porter & Company | Sponsored
Think you missed gold’s boom? Think again
If you've been watching gold's historic run and wondering if it's too late… I've got good news. Because the...
Investors Alley | Sponsored
Everyone’s watching Nvidia right now. Here’s why I’m excited.
So, unless you’ve been living under a rock, you probably saw the news… Nvidia just signed a $7 BILLION deal...
Timothy Sykes | Sponsored
New law could create $3.7 trillion tsunami.
During a meeting in Washington D.C., Jeff Brown discovered a bold initiative. He calls it “President Trump’...
Brownstone Research | Sponsored
The Trump Dump is starting; Get out of stocks now?
The first 365 days of the Trump presidency… Will be the best time to get rich in American history.
Paradigm Press | Sponsored
Crypto Income (almost instantly)
How would you like to collect a small percentage of the $4 billion changing hands daily in the crypto market? ...
Awesomely, LLC | Sponsored
National 'Stock Market Reset' Coming September 30 (New WH Order)
Crash Coming Sept 30? Analysts Warn of New Crisis A new problem on the U.S. power grid is putting millions ...
Altimetry | Sponsored