Home About FAQ Contact Media Mentions Key Subscribe
 
Transaction Types Key To InsiderInsights' Infobase
 B  AB  JB*  OB  OE*  OE
 S  AS  JS*  OS  OS*  3
 JB
 JS
Reduced Version of Subscription Insider Search
Check all filing types
Uncheck all filing types
Remove The Noise What is the 'Remove The Noise' function?
Insider Portfolio Alerts
Free real time insider alerts
Top Trade Alerts
Free insider trades intra-day
Special Screens Report
Free insider special screens report
Our Input Date Search is an excellent tool to examine the latest insider trades for new long and short investment ideas, but it is only available to paid subscribers.

Click Here to Subscribe

close window
Feature available to paying subscribers only. Subscriber output is also not separated on different pages, so that print outs and Excel downloads contain all of a search's information.

Click Here to Subscribe

close window

Detailed Insider History for:
AMPHASTAR PHARMACEUTICALS INC: AMPH
Price: 3/28/25 52-Wk
High		 52-Wk
Low		 Mkt Cap (mm) Shrs Out (mm) 3-Mth Ave
Vol (m)		 Ind. Yield Short Int
% Float		 Inst. Owned Insider Owned
$28.43 $53.96 $25.89 $1,355 48 588 0.0% 12.5% 76.09% 22.92%
Exch Sector Industry Sub-Industry
NasdaqGS Services Engineering, Accounting, Research, Management, And Related Services Services- Management Services
<<PREV
Page
123
 NEXT>>
click column headers to sort
#
View Form
Insider Statistics
T N H M S
Filer Name
Insider Title
Trans Type
Dollar Value
Shares Traded
Trans Date From
Trans Date To
Trans Price From
Trans Price To
Total Holdings
Delta % Owned
Owned
Other Info
Input Date
1
1y
55
38%
16%
1
PETERSEN FLOYD F
DIR
AS
$14,190
500
---
4/1/25
---
$28.38
73,909
-0.7
D
10b
4/2/25 - 6:45:10 pm
2
    
 
ZHOU RONG
VP
JS
$87,045
3,189
3/15/25
3/17/25
$26.66
$27.69
137,497
-2.3
D
R
3/18/25 - 7:43:26 pm
3
1y
34
38%
12%
1
ZHANG JACK Y
CEO,DIR,BO
OS
$4,646,147
173,995
3/14/25
3/17/25
$26.66
$27.69
1,185,475
-12.8
I
R
3/18/25 - 7:13:17 pm
4
1y
34
38%
12%
1
ZHANG JACK Y
CEO,DIR,BO
OS
$6,740,287
252,200
3/14/25
3/17/25
$26.66
$27.69
2,647,659
-8.7
D
R
3/18/25 - 7:13:17 pm
5
    
 
LIAWATIDEWI YAKOB
VP,DIR
JS
$75,418
2,762
3/15/25
3/17/25
$26.66
$27.69
90,909
-2.9
D
R
3/18/25 - 6:41:24 pm
6
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
JS
$135,648
4,972
3/15/25
3/17/25
$26.66
$27.69
125,258
-3.8
D
R
3/18/25 - 6:38:18 pm
7
1y
10
80%
12%
1
ZHANG JACK Y
CEO,DIR,BO
OB
$4,267,107
290,477
---
3/14/25
---
$14.69
2,899,859
11.1
D
R
3/18/25 - 7:13:17 pm
8
    
 
ZHANG JACK Y
CEO,DIR,BO
OE
$3,102,719
211,213
---
3/14/25
---
$14.69
1,359,470
18.4
I
R
3/18/25 - 7:13:17 pm
9
    
 
ZHOU RONG
VP
JB
---
24,692
---
3/10/25
---
---
140,686
21.3
D
R
3/12/25 - 4:53:02 pm
10
    
 
LIAWATIDEWI YAKOB
VP,DIR
JB
---
20,837
---
3/10/25
---
---
93,671
28.6
D
R
3/12/25 - 4:16:00 pm
11
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
JB
---
36,747
---
3/10/25
---
---
130,230
39.3
D
R
3/12/25 - 4:14:45 pm
12
    
 
ZHANG JACK Y
CEO,DIR,BO
JB
---
48,996
---
3/10/25
---
---
1,148,257
4.5
I
R
3/12/25 - 4:03:21 pm
13
    
 
ZHANG JACK Y
CEO,DIR,BO
JB
---
116,226
---
3/10/25
---
---
2,609,382
4.7
D
R
3/12/25 - 4:03:21 pm
14
    
 
ZHOU RONG
VP
JS
$38,345
1,354
---
3/6/25
---
$28.32
115,994
-1.2
D
R
3/10/25 - 6:10:15 pm
15
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
JS
$60,633
2,141
---
3/6/25
---
$28.32
93,483
-2.2
D
R
3/10/25 - 5:29:01 pm
16
    
 
LIAWATIDEWI YAKOB
VP,DIR
JS
$32,313
1,141
---
3/6/25
---
$28.32
72,834
-1.5
D
R
3/10/25 - 4:05:57 pm
17
    
 
ZHANG JACK Y
CEO,DIR,BO
JS
$273,146
9,645
---
3/6/25
---
$28.32
2,493,156
-0.4
D
R
3/10/25 - 4:04:32 pm
18
    
 
ZHANG JACK Y
CEO,DIR,BO
JS
$86,914
3,069
---
3/6/25
---
$28.32
1,099,261
-0.3
I
R
3/10/25 - 4:04:32 pm
19
1y
55
38%
16%
1
PETERSEN FLOYD F
DIR
AS
$27,986
1,000
---
3/6/25
---
$27.99
74,409
-1.3
D
10b
3/7/25 - 4:01:30 pm
20
1y
54
48%
8%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
OS
$116,515
4,231
---
3/4/25
---
$27.54
97,363
-4.2
D
R,10b
3/6/25 - 5:00:31 pm
21
1y
54
48%
8%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
OS
$48,031
1,739
---
3/4/25
---
$27.62
95,624
-1.8
D
R,10b
3/6/25 - 5:00:31 pm
22
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
OE
$99,992
7,490
---
3/4/25
---
$13.35
101,594
8.0
D
R,10b
3/6/25 - 5:00:31 pm
23
    
 
ZHOU RONG
VP
JS
$30,962
1,121
---
3/4/25
---
$27.62
117,348
-0.9
D
R
3/6/25 - 4:22:15 pm
24
1y
20
55%
13%
1
ZHOU RONG
VP
OS
$672,815
15,000
12/12/24
12/13/24
$44.42
$45.23
118,469
-11.2
D
---
12/16/24 - 5:22:52 pm
25
    
 
ZHOU RONG
VP
OE
$169,950
15,000
12/12/24
12/13/24
---
$11.33
126,469
13.5
D
---
12/16/24 - 5:22:52 pm
26
1y
32
47%
8%
3
PRINS RICHARD K
DIR
OS
---
410
---
12/9/24
---
---
30,061
-1.3
D
---
12/11/24 - 8:28:14 pm
27
1y
32
47%
8%
3
PRINS RICHARD K
DIR
OS
$437,702
10,000
---
12/9/24
---
$43.77
30,471
-24.7
D
---
12/11/24 - 8:28:14 pm
28
    
 
PRINS RICHARD K
DIR
OE
$195,200
10,000
---
12/9/24
---
$19.52
40,471
32.8
D
---
12/11/24 - 8:28:14 pm
29
1y
20
55%
13%
1
ZHOU RONG
VP
OS
$336,930
6,893
---
11/12/24
---
$48.88
118,388
-5.5
D
---
11/13/24 - 8:26:41 pm
30
    
 
ZHOU RONG
VP
OE
$103,050
6,893
---
11/12/24
---
$14.95
125,281
5.8
D
---
11/13/24 - 8:26:41 pm
31
1y
32
47%
8%
3
PRINS RICHARD K
DIR
OS
---
1,000
---
11/12/24
---
---
30,471
-3.2
D
---
11/13/24 - 6:55:11 pm
32
1y
32
47%
8%
3
PRINS RICHARD K
DIR
OS
$243,986
5,000
---
11/12/24
---
$48.80
31,471
-13.7
D
---
11/13/24 - 6:55:11 pm
33
    
 
PRINS RICHARD K
DIR
OE
$41,725
2,500
---
11/12/24
---
$16.69
36,471
7.4
D
---
11/13/24 - 6:55:11 pm
34
    
 
ZHANG JACK Y
CEO,DIR,BO
JS
---
125,000
---
11/11/24
---
---
2,508,554
-4.7
D
---
11/12/24 - 8:05:04 pm
35
    
 
ZHANG JACK Y
CEO,DIR,BO
JS
---
125,000
---
11/11/24
---
---
1,104,756
-10.2
I
---
11/12/24 - 8:05:04 pm
36
1y
22
73%
10%
1
LIAWATIDEWI YAKOB
VP,DIR
OS
$271,389
5,214
---
11/6/24
---
$52.05
74,938
-6.5
D
10b
11/8/24 - 7:02:21 pm
37
    
 
LIAWATIDEWI YAKOB
VP,DIR
OE
$67,938
5,214
---
11/6/24
---
$13.03
80,152
7.0
D
10b
11/8/24 - 7:02:21 pm
38
1y
54
48%
8%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
OS
$386,523
7,426
---
11/6/24
---
$52.05
94,103
-7.3
D
10b
11/8/24 - 5:24:43 pm
39
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
OE
$96,761
7,426
---
11/6/24
---
$13.03
101,529
7.9
D
10b
11/8/24 - 5:24:43 pm
40
1y
20
55%
13%
1
ZHOU RONG
VP
OS
$144,785
3,000
---
9/13/24
---
$48.26
118,388
-2.5
D
---
9/17/24 - 4:11:44 pm
41
    
 
ZHOU RONG
VP
OE
$44,850
3,000
---
9/13/24
---
$14.95
121,388
2.5
D
---
9/17/24 - 4:11:44 pm
42
1y
10
80%
12%
1
ZHANG JACK Y
CEO,DIR,BO
OB
$1,469,000
100,000
---
9/13/24
---
$14.69
2,633,554
3.9
D
---
9/16/24 - 7:09:17 pm
43
1y
55
38%
16%
1
PETERSEN FLOYD F
DIR
S
$139,417
3,000
---
9/5/24
---
$46.47
75,409
-3.8
D
---
9/6/24 - 7:48:27 pm
44
1y
20
55%
13%
1
ZHOU RONG
VP
OS
$193,400
4,000
---
8/26/24
---
$48.35
118,388
-3.3
D
---
8/27/24 - 9:33:05 pm
45
    
 
ZHOU RONG
VP
OE
$59,800
4,000
---
8/26/24
---
$14.95
122,388
3.4
D
---
8/27/24 - 9:33:05 pm
46
1y
32
47%
8%
3
PRINS RICHARD K
DIR
OS
$736,550
17,101
---
8/12/24
---
$43.07
33,971
-33.5
D
---
8/13/24 - 5:58:37 pm
47
    
 
PRINS RICHARD K
DIR
OE
$339,170
17,101
---
8/12/24
---
$19.52
51,072
50.3
D
---
8/13/24 - 5:58:37 pm
48
1y
54
48%
8%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
OS
$454,773
10,282
---
7/31/24
---
$44.23
94,103
-9.9
D
10b
8/2/24 - 4:32:54 pm
49
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
OE
$208,005
10,282
---
7/31/24
---
$20.23
104,385
10.9
D
10b
8/2/24 - 4:32:54 pm
50
1y
54
48%
8%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
AS
$147,169
3,596
---
6/27/24
$40.85
$41.29
94,103
-3.7
D
10b
6/28/24 - 4:26:52 pm
<<PREV
Page
123
 NEXT>>
Subscribe Data Module Screens Alerts Newsletter Daily Ratings Reports Free Stuff
Home About FAQ Contact Disclaimer & Terms Of Use Privacy Media Mentions Transaction Codes
© 2025 InsiderInsights.com