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NASDAQ:AMPHAmphastar Pharmaceuticals SEC Filings & 10K Form

$21.67
-0.31 (-1.41 %)
(As of 07/7/2020 01:50 PM ET)
Add
Compare
Today's Range
$21.64
Now: $21.67
$21.87
50-Day Range
$18.18
MA: $19.99
$22.46
52-Week Range
$12.32
Now: $21.67
$22.85
Volume5,472 shs
Average Volume340,233 shs
Market Capitalization$1.00 billion
P/E Ratio20.64
Dividend YieldN/A
Beta1.19

SEC Filings

Amphastar Pharmaceuticals (NASDAQ:AMPH) SEC Filings

DateFilerForm TypeView
07/02/2020
6:36 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/15/2020
6:09 PM
Amphastar Pharmaceuticals (Issuer)
Lee Howard (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/15/2020
6:08 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/10/2020
6:39 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/09/2020
7:29 PM
Amphastar Pharmaceuticals (Issuer)
ZASLOFF MICHAEL A (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/09/2020
7:28 PM
Amphastar Pharmaceuticals (Issuer)
PRINS RICHARD K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/09/2020
7:26 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/09/2020
7:24 PM
Amphastar Pharmaceuticals (Issuer)
Maris David (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/09/2020
7:23 PM
Amphastar Pharmaceuticals (Issuer)
Lee Howard (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/09/2020
7:21 PM
Amphastar Pharmaceuticals (Issuer)
Koo Richard (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/09/2020
7:19 PM
Amphastar Pharmaceuticals (Issuer)
Gerst Diane G. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/09/2020
7:16 PM
Amphastar Pharmaceuticals (Issuer)
Maris David (Reporting)
Form 3
Initial statement of beneficial ownership of securities  
06/08/2020
5:37 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/02/2020
4:46 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
05/27/2020
4:02 PM
Amphastar Pharmaceuticals (Issuer)
Lee Howard (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
05/14/2020
3:18 PM
Amphastar Pharmaceuticals (Issuer)
ZASLOFF MICHAEL A (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
05/14/2020
3:17 PM
Amphastar Pharmaceuticals (Issuer)
PRINS RICHARD K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
05/11/2020
3:13 PM
Amphastar Pharmaceuticals (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
05/05/2020
4:05 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
04/15/2020
3:34 PM
Amphastar Pharmaceuticals (Filer)
Form DEFA14A
04/15/2020
3:30 PM
Amphastar Pharmaceuticals (Filer)
Form DEF 14A
04/14/2020
5:39 AM
Amphastar Pharmaceuticals (Filer)
Form 8-K/A
04/13/2020
4:20 PM
Amphastar Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
04/02/2020
4:46 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2020
4:35 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2020
4:34 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2020
4:32 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2020
4:31 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2020
4:29 PM
Amphastar Pharmaceuticals (Issuer)
Luo Mary Z. (Reporting)
Zhang Jack Y. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/17/2020
7:14 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/17/2020
7:11 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/17/2020
7:07 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/17/2020
7:05 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/17/2020
7:03 PM
Amphastar Pharmaceuticals (Issuer)
Luo Mary Z. (Reporting)
Zhang Jack Y. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/16/2020
4:27 PM
Amphastar Pharmaceuticals (Filer)
Form S-8
Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans  
03/16/2020
3:49 PM
Amphastar Pharmaceuticals (Filer)
Form 10-K
Annual report pursuant to Section 13 or 15(d)  
02/14/2020
5:03 AM
Amphastar Pharmaceuticals (Subject)
Zhang Jack Y. (Filed by)
Form SC 13G/A
02/07/2020
7:08 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
01/23/2020
3:05 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
01/10/2020
3:05 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
01/03/2020
4:05 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
12/20/2019
3:06 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
11/08/2019
4:06 PM
Amphastar Pharmaceuticals (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
11/05/2019
3:06 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
10/03/2019
5:21 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
09/20/2019
3:05 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
09/18/2019
3:32 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
09/17/2019
7:13 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
09/17/2019
6:11 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
09/12/2019
6:50 PM
Amphastar Pharmaceuticals (Issuer)
Applied Physics & Chemistry Laboratories, Inc. (Reporting)
Luo Mary Z. (Reporting)
Zhang Jack Y. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
09/09/2019
7:16 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
08/27/2019
6:36 PM
Amphastar Pharmaceuticals (Issuer)
PRINS RICHARD K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
08/16/2019
4:07 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
08/15/2019
3:06 PM
Amphastar Pharmaceuticals (Issuer)
PRINS RICHARD K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
08/07/2019
3:18 PM
Amphastar Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
07/12/2019
6:05 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/18/2019
8:29 PM
Amphastar Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
06/17/2019
6:00 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/17/2019
5:58 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/13/2019
7:04 PM
Amphastar Pharmaceuticals (Issuer)
ZASLOFF MICHAEL A (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/13/2019
7:02 PM
Amphastar Pharmaceuticals (Issuer)
PRINS RICHARD K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/13/2019
7:00 PM
Amphastar Pharmaceuticals (Issuer)
Petersen Floyd F. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/13/2019
6:58 PM
Amphastar Pharmaceuticals (Issuer)
Lee Howard (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/13/2019
6:57 PM
Amphastar Pharmaceuticals (Issuer)
Koo Richard (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/13/2019
6:54 PM
Amphastar Pharmaceuticals (Issuer)
Gerst Diane G. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/13/2019
6:51 PM
Amphastar Pharmaceuticals (Issuer)
Gerst Diane G. (Reporting)
Form 3
Initial statement of beneficial ownership of securities  
06/13/2019
5:38 AM
Amphastar Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
06/10/2019
3:55 PM
Amphastar Pharmaceuticals (Issuer)
Lee Howard (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
05/07/2019
7:25 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
04/18/2019
3:15 PM
Amphastar Pharmaceuticals (Filer)
Form DEFA14A
04/18/2019
3:11 PM
Amphastar Pharmaceuticals (Filer)
Form DEF 14A
04/18/2019
3:05 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/28/2019
3:58 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/27/2019
8:56 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/27/2019
8:54 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/27/2019
8:53 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/19/2019
3:05 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/19/2019
5:06 AM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2019
7:52 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2019
6:56 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/18/2019
6:53 PM
Amphastar Pharmaceuticals (Issuer)
Luo Mary Z. (Reporting)
Zhang Jack Y. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/15/2019
3:15 PM
Amphastar Pharmaceuticals (Filer)
Form S-8
Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans  
03/14/2019
3:58 PM
Amphastar Pharmaceuticals (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
03/06/2019
4:20 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/04/2019
7:44 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/04/2019
7:43 PM
Amphastar Pharmaceuticals (Issuer)
Zhou Rong (Reporting)
Form 4/A
03/01/2019
7:01 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
02/15/2019
7:09 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
02/15/2019
3:56 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
02/14/2019
5:30 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
02/13/2019
3:05 PM
Amphastar Pharmaceuticals (Subject)
Zhang Jack Y. (Filed by)
Form SC 13G/A
02/06/2019
7:12 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
01/25/2019
3:11 PM
Amphastar Pharmaceuticals (Issuer)
Shandell Jason B. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
01/24/2019
7:47 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
01/24/2019
12:46 PM
Amphastar Pharmaceuticals (Subject)
BlackRock Inc. (Filed by)
Form SC 13G/A
01/16/2019
6:10 PM
Amphastar Pharmaceuticals (Issuer)
Liawatidewi Yakob (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
01/04/2019
4:04 PM
Amphastar Pharmaceuticals (Issuer)
PETERS WILLIAM J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
12/17/2018
7:05 PM
Amphastar Pharmaceuticals (Issuer)
PRINS RICHARD K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
12/17/2018
7:02 PM
Amphastar Pharmaceuticals (Issuer)
Luo Mary Z. (Reporting)
Zhang Jack Y. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
12/13/2018
7:08 PM
Amphastar Pharmaceuticals (Issuer)
Luo Mary Z. (Reporting)
Zhang Jack Y. (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
This page was last updated on 7/7/2020 by MarketBeat.com Staff

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