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 JS
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Detailed Insider History for:
AMPHASTAR PHARMACEUTICALS INC: AMPH
Price: 12/20/24 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
$39.14 $65.92 $36.56 $1,882 48 389 0.0% 13.2% 74.93% 22.41%
Exch Sector Industry Sub-Industry
NasdaqGS Services Engineering, Accounting, Research, Management, And Related Services Services- Management Services
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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
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
2
    
 
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
3
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
4
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
5
    
 
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
6
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
7
    
 
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
8
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
9
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
10
    
 
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
11
    
 
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
12
    
 
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
13
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
14
    
 
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
15
1y
52
46%
10%
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
16
    
 
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
17
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
18
    
 
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
19
1y
9
89%
18%
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
20
1y
50
32%
21%
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
21
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
22
    
 
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
23
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
24
    
 
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
25
1y
52
46%
10%
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
26
    
 
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
27
1y
52
46%
10%
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
28
1y
9
89%
18%
1
ZHANG JACK Y
CEO,DIR,BO
OB
$1,469,000
100,000
---
6/10/24
---
$14.69
2,533,554
4.1
D
---
6/11/24 - 6:35:15 pm
29
1y
50
32%
21%
1
PETERSEN FLOYD F
DIR
S
$124,200
3,000
---
6/10/24
---
$41.40
78,409
-3.7
D
---
6/11/24 - 6:32:36 pm
30
    
 
LIAWATIDEWI YAKOB
VP,DIR
JS
$11,484
272
---
6/4/24
---
$42.22
74,938
-0.4
D
R
6/5/24 - 6:00:54 pm
31
    
 
GERST DIANE G
DIR
JB
---
3,076
---
6/3/24
---
---
18,634
19.8
D
R
6/5/24 - 7:03:10 pm
32
    
 
DEFLIN GAYLE
DIR
JB
---
3,076
---
6/3/24
---
---
5,792
113.3
D
R
6/5/24 - 6:56:31 pm
33
1y
50
32%
21%
1
PETERSEN FLOYD F
DIR
AS
$21,326
500
---
6/3/24
---
$42.65
78,333
-0.6
D
R,10b
6/5/24 - 6:54:30 pm
34
    
 
PETERSEN FLOYD F
DIR
JB
---
3,076
---
6/3/24
---
---
81,409
3.9
D
R,10b
6/5/24 - 6:54:30 pm
35
    
 
PRINS RICHARD K
DIR
JB
---
3,076
---
6/3/24
---
---
33,971
10.0
D
R
6/5/24 - 5:58:49 pm
36
    
 
ZASLOFF MICHAEL A
DIR
JB
---
3,076
---
6/3/24
---
---
24,402
14.4
D
R
6/5/24 - 5:56:54 pm
37
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
JS
$16,827
387
---
5/19/24
---
$43.48
97,268
-0.4
D
R
5/21/24 - 6:26:44 pm
38
1y
50
32%
21%
1
PETERSEN FLOYD F
DIR
AS
$20,837
500
---
5/1/24
---
$41.67
78,833
-0.6
D
10b
5/2/24 - 4:56:42 pm
39
1y
50
32%
21%
1
PETERSEN FLOYD F
DIR
AS
$21,714
500
---
4/1/24
---
$43.43
79,333
-0.6
D
10b
4/2/24 - 9:31:21 pm
40
1y
32
34%
15%
1
ZHANG JACK Y
CEO,DIR,BO
OS
$9,028,016
209,710
3/15/24
3/17/24
---
$43.05
1,229,756
-14.6
I
R
3/19/24 - 6:55:31 pm
41
1y
32
34%
15%
1
ZHANG JACK Y
CEO,DIR,BO
OS
$18,274,252
424,489
3/15/24
3/17/24
---
$43.05
2,433,554
-14.9
D
R
3/19/24 - 6:55:31 pm
42
    
 
LIAWATIDEWI YAKOB
VP,DIR
JS
$190,453
4,424
3/15/24
3/17/24
---
$43.05
74,778
-5.6
D
R
3/19/24 - 5:17:54 pm
43
    
 
ZHOU RONG
VP
JS
$238,282
5,535
3/15/24
3/17/24
---
$43.05
118,016
-4.5
D
R
3/19/24 - 5:15:22 pm
44
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
JS
$501,317
11,645
3/15/24
3/17/24
---
$43.05
97,655
-10.7
D
R
3/19/24 - 5:10:25 pm
45
1y
9
89%
18%
1
ZHANG JACK Y
CEO,DIR,BO
OB
$8,996,693
722,046
---
3/15/24
---
$12.46
2,858,043
33.8
D
R
3/19/24 - 6:55:31 pm
46
    
 
ZHANG JACK Y
CEO,DIR,BO
OE
$3,874,188
310,930
---
3/15/24
---
$12.46
1,439,466
27.6
I
R
3/19/24 - 6:55:31 pm
47
1y
52
46%
10%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
OS
$101,419
2,190
---
3/6/24
---
$46.31
109,300
-2.0
D
R,10b
3/8/24 - 4:52:41 pm
48
1y
52
46%
10%
2
PETERS WILLIAM J
CFO,VP,TR,DIR
OS
$842,883
18,136
---
3/6/24
$46.30
$48.00
111,490
-14.0
D
R,10b
3/8/24 - 4:52:41 pm
49
    
 
PETERS WILLIAM J
CFO,VP,TR,DIR
OE
$99,999
8,826
---
3/6/24
---
$11.33
129,626
7.3
D
R,10b
3/8/24 - 4:52:41 pm
50
    
 
LIAWATIDEWI YAKOB
VP,DIR
JS
$56,545
1,221
---
3/6/24
---
$46.31
79,202
-1.5
D
R
3/8/24 - 4:49:30 pm
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