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Transaction Types Key To InsiderInsights' Infobase
 B  AB  JB*  OB  OE*  OE
 S  AS  JS*  OS  OS*  3
 JB
 JS
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Detailed Insider History for:
AMPHASTAR PHARMACEUTICALS INC: AMPH
Price: 4/4/25 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
$26.61 $53.96 $25.89 $1,268 48 598 0.0% 12.5% 76.08% 22.92%
Exch Sector Industry Sub-Industry
NasdaqGS Services Engineering, Accounting, Research, Management, And Related Services Services- Management Services
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#
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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
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
OE
$956,795
56,500
---
9/6/23
---
$13.03
162,103
53.5
D
10b
9/8/23 - 4:08:31 pm
2
1y
22
73%
10%
1
LIAWATIDEWI YAKOB
VP,DIR
OS
$1,530,994
28,816
---
8/28/23
---
$53.13
69,669
-29.3
D
10b
8/29/23 - 6:54:15 pm
3
    
 
LIAWATIDEWI YAKOB
VP,DIR
OE
$428,095
28,816
---
8/28/23
---
$13.03
98,485
41.4
D
10b
8/29/23 - 6:54:15 pm
4
1y
32
47%
8%
3
PRINS RICHARD K
DIR
S
$105,006
2,000
---
8/18/23
---
$52.50
40,895
-4.7
D
---
8/21/23 - 4:05:21 pm
5
1y
15
40%
6%
1
ZASLOFF MICHAEL A
DIR
S
$730,025
12,759
---
8/15/23
---
$57.22
33,826
-27.4
D
---
8/16/23 - 8:23:43 pm
6
1y
32
47%
8%
3
PRINS RICHARD K
DIR
S
$238,911
4,163
---
8/15/23
---
$57.39
42,895
-8.8
D
---
8/16/23 - 8:22:39 pm
7
1y
2
50%
-8%
1
ZHOU RONG
VP
OB
$109,346
9,651
---
6/20/23
---
$11.33
112,341
9.4
D
---
6/21/23 - 5:05:43 pm
8
1y
20
55%
13%
1
ZHOU RONG
VP
OS
$241,200
5,000
---
6/13/23
---
$48.24
88,313
-5.4
D
---
6/14/23 - 5:36:12 pm
9
    
 
ZHOU RONG
VP
OE
$72,000
5,000
---
6/13/23
---
$14.40
93,313
5.7
D
---
6/14/23 - 5:36:12 pm
10
    
 
LEE HOWARD
DIR
JS
$17,126
375
---
6/10/23
---
$45.67
145,280
-0.3
D
R
6/12/23 - 4:05:49 pm
11
    
 
PRINS RICHARD K
DIR
JB
---
2,716
---
6/5/23
---
---
47,058
6.1
D
R
6/7/23 - 8:13:47 pm
12
    
 
PETERSEN FLOYD F
DIR
JB
---
2,716
---
6/5/23
---
---
82,833
3.4
D
R
6/7/23 - 8:12:37 pm
13
    
 
GERST DIANE G
DIR
JB
---
2,716
---
6/5/23
---
---
15,558
21.1
D
R
6/7/23 - 6:24:37 pm
14
    
 
ZASLOFF MICHAEL A
DIR
JB
---
2,716
---
6/5/23
---
---
46,585
6.2
D
R
6/7/23 - 5:20:38 pm
15
    
 
LEE HOWARD
DIR
JB
---
2,716
---
6/5/23
---
---
145,655
1.9
D
R
6/7/23 - 5:19:44 pm
16
    
 
DEFLIN GAYLE
DIR
JB
---
2,716
---
6/5/23
---
---
6,879
65.2
D
R
6/7/23 - 5:18:56 pm
17
    
 
LIAWATIDEWI YAKOB
VP,DIR
JS
$17,653
378
---
6/4/23
---
$46.70
69,669
-0.5
D
R
6/6/23 - 6:49:04 pm
18
1y
54
48%
8%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
OS
$509,859
11,000
---
6/2/23
---
$46.35
105,603
-9.4
D
10b
6/5/23 - 5:06:59 pm
19
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
OE
$146,850
11,000
---
6/2/23
---
$13.35
116,603
10.4
D
10b
6/5/23 - 5:06:59 pm
20
1y
12
33%
25%
2
LEE HOWARD
DIR
OS
$750,960
16,679
---
6/1/23
---
$45.02
142,939
-10.4
D
---
6/5/23 - 4:18:06 pm
21
    
 
LEE HOWARD
DIR
OE
$278,373
16,679
---
6/1/23
---
$16.69
159,618
11.7
D
---
6/5/23 - 4:18:06 pm
22
1y
54
48%
8%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
OS
$16,692
378
---
5/19/23
---
$44.16
104,770
-0.4
D
R,10b
5/22/23 - 6:49:13 pm
23
1y
54
48%
8%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
OS
$465,675
10,500
---
5/18/23
---
$44.35
105,148
-9.1
D
R,10b
5/22/23 - 6:49:13 pm
24
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
OE
$140,175
10,500
---
5/18/23
---
$13.35
115,648
10.0
D
R,10b
5/22/23 - 6:49:13 pm
25
1y
20
55%
13%
1
ZHOU RONG
VP
OS
$442,050
10,000
---
5/18/23
---
$44.20
87,598
-10.2
D
---
5/19/23 - 6:36:25 pm
26
    
 
ZHOU RONG
VP
OE
$144,000
10,000
---
5/18/23
---
$14.40
97,598
11.4
D
---
5/19/23 - 6:36:25 pm
27
    
 
DEFLIN GAYLE
DIR
S
$198,888
4,519
---
5/18/23
---
$44.01
4,163
-52.1
D
---
5/19/23 - 6:30:35 pm
28
1y
55
38%
16%
1
PETERSEN FLOYD F
DIR
S
$215,655
5,000
---
5/17/23
---
$43.13
80,117
-5.9
D
---
5/18/23 - 4:52:35 pm
29
    
 
DEFLIN GAYLE
DIR
S
$64,728
1,500
---
5/15/23
---
$43.15
8,682
-14.7
D
---
5/17/23 - 4:05:15 pm
30
1y
15
40%
6%
1
ZASLOFF MICHAEL A
DIR
S
$316,335
7,500
---
5/15/23
---
$42.18
43,869
-14.6
D
---
5/16/23 - 8:01:53 pm
31
1y
32
47%
8%
3
PRINS RICHARD K
DIR
OS
$427,825
10,000
5/12/23
5/15/23
$42.06
$43.50
44,342
-18.4
D
---
5/16/23 - 7:59:39 pm
32
    
 
PRINS RICHARD K
DIR
OE
$166,900
10,000
5/12/23
5/15/23
---
$16.69
52,342
23.6
D
---
5/16/23 - 7:59:39 pm
33
    
 
PRINS RICHARD K
DIR
JS
---
3,000
---
5/12/23
---
---
44,342
-6.3
D
---
5/16/23 - 7:59:39 pm
34
1y
54
48%
8%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
OS
$238,515
5,632
---
4/17/23
---
$42.35
105,148
-5.1
D
10b
4/18/23 - 8:07:05 pm
35
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
OE
$75,187
5,632
---
4/17/23
---
$13.35
110,780
5.4
D
10b
4/18/23 - 8:07:05 pm
36
1y
22
73%
10%
1
LIAWATIDEWI YAKOB
VP,DIR
OS
$477,748
11,494
---
4/13/23
$41.00
$42.00
69,215
-14.2
D
10b
4/14/23 - 5:50:00 pm
37
    
 
LIAWATIDEWI YAKOB
VP,DIR
OE
$232,524
11,494
---
4/13/23
---
$20.23
80,709
16.6
D
10b
4/14/23 - 5:50:00 pm
38
1y
54
48%
8%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
OS
$206,160
4,868
---
4/13/23
---
$42.35
105,148
-4.4
D
10b
4/14/23 - 5:48:03 pm
39
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
OE
$64,988
4,868
---
4/13/23
---
$13.35
110,016
4.6
D
10b
4/14/23 - 5:48:03 pm
40
1y
22
73%
10%
1
LIAWATIDEWI YAKOB
VP,DIR
OS
$200,000
5,000
---
4/10/23
---
$40.00
69,215
-6.7
D
10b
4/12/23 - 5:22:46 pm
41
    
 
LIAWATIDEWI YAKOB
VP,DIR
OE
$101,150
5,000
---
4/10/23
---
$20.23
74,215
7.2
D
10b
4/12/23 - 5:22:46 pm
42
1y
54
48%
8%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
OS
$404,791
10,032
---
4/10/23
---
$40.35
105,148
-8.7
D
10b
4/12/23 - 5:21:12 pm
43
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
OE
$133,927
10,032
---
4/10/23
---
$13.35
115,180
9.5
D
10b
4/12/23 - 5:21:12 pm
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