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 S  AS  JS*  OS  OS*  3
 JB
 JS
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Detailed Insider History for:
AMPHASTAR PHARMACEUTICALS INC: AMPH
Price: 4/10/24 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
$40.05 $67.66 $35.62 $1,926 48 441 0.0% 11.8% 71.21% 22.04%
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
1y
38
45%
7%
2
PETERS WILLIAM J
CFO,VP,TR
OS
$398,685
10,974
---
3/1/23
---
$36.33
100,614
-9.8
D
10b
3/3/23 - 4:47:47 pm
2
    
 
PETERS WILLIAM J
CFO,VP,TR
OE
$124,335
10,974
---
3/1/23
---
$11.33
111,588
10.9
D
10b
3/3/23 - 4:47:47 pm
3
1y
36
39%
12%
1
PETERSEN FLOYD F
DIR
AS
$18,349
500
---
3/1/23
$33.70
$37.25
85,608
-0.6
D
10b
3/2/23 - 7:33:25 pm
4
1y
36
39%
12%
1
PETERSEN FLOYD F
DIR
AS
$15,176
500
---
2/1/23
---
$30.35
86,108
-0.6
D
10b
2/2/23 - 4:44:51 pm
5
1y
36
39%
12%
1
PETERSEN FLOYD F
DIR
AS
$13,971
500
---
1/3/23
---
$27.94
86,608
-0.6
D
10b
1/4/23 - 4:01:37 pm
6
1y
36
39%
12%
1
PETERSEN FLOYD F
DIR
AS
$15,067
500
---
12/1/22
---
$30.13
87,108
-0.6
D
10b
12/2/22 - 4:24:16 pm
7
1y
36
39%
12%
1
PETERSEN FLOYD F
DIR
AS
$15,565
500
---
11/1/22
---
$31.13
87,608
-0.6
D
10b
11/2/22 - 4:01:28 pm
8
1y
36
39%
12%
1
PETERSEN FLOYD F
DIR
AS
$14,296
500
---
10/3/22
---
$28.59
88,108
-0.6
D
10b
10/4/22 - 7:12:48 pm
9
1y
36
39%
12%
1
PETERSEN FLOYD F
DIR
AS
$14,722
500
---
9/1/22
---
$29.44
88,608
-0.6
D
10b
9/2/22 - 7:45:06 pm
10
1y
38
45%
7%
2
PETERS WILLIAM J
CFO,VP,TR
OS
$383,500
10,000
---
8/9/22
---
$38.35
100,480
-9.1
D
10b
8/10/22 - 7:34:12 pm
11
    
 
PETERS WILLIAM J
CFO,VP,TR
OE
$133,500
10,000
---
8/9/22
---
$13.35
110,480
10.0
D
10b
8/10/22 - 7:34:12 pm
12
1y
17
82%
6%
1
LIAWATIDEWI YAKOB
VP
AS
$309,145
8,055
8/8/22
8/9/22
$38.00
$39.00
61,607
-11.6
D
10b
8/10/22 - 5:04:48 pm
13
    
 
LIAWATIDEWI YAKOB
VP
JB
$159,408
8,055
8/8/22
8/9/22
---
$19.79
66,607
13.8
D
10b
8/10/22 - 5:04:48 pm
14
1y
36
39%
12%
1
PETERSEN FLOYD F
DIR
AS
$18,739
500
---
8/1/22
---
$37.48
89,108
-0.6
D
10b
8/2/22 - 5:02:20 pm
15
1y
14
36%
2%
1
GERST DIANE G
DIR
OS
$56,597
1,520
---
7/18/22
---
$37.23
12,842
-10.6
D
10b
7/19/22 - 5:19:07 pm
16
    
 
GERST DIANE G
DIR
OE
$30,522
1,520
---
7/18/22
---
$20.08
14,362
11.8
D
10b
7/19/22 - 5:19:07 pm
17
1y
17
82%
6%
1
LIAWATIDEWI YAKOB
VP
OS
$397,083
10,837
---
7/15/22
$35.94
$36.97
61,607
-15.0
D
10b
7/18/22 - 6:13:35 pm
18
    
 
LIAWATIDEWI YAKOB
VP
OE
$214,464
10,837
---
7/15/22
---
$19.79
72,444
17.6
D
10b
7/18/22 - 6:13:35 pm
19
1y
14
36%
2%
1
GERST DIANE G
DIR
OS
$55,145
1,521
---
7/11/22
---
$36.26
12,842
-10.6
D
10b
7/12/22 - 7:38:50 pm
20
    
 
GERST DIANE G
DIR
OE
$30,542
1,521
---
7/11/22
---
$20.08
14,363
11.8
D
10b
7/12/22 - 7:38:50 pm
21
1y
14
36%
2%
1
GERST DIANE G
DIR
OS
$63,460
1,813
---
7/5/22
---
$35.00
12,842
-12.4
D
10b
7/6/22 - 8:52:35 pm
22
    
 
GERST DIANE G
DIR
OE
$36,405
1,813
---
7/5/22
---
$20.08
14,655
14.1
D
10b
7/6/22 - 8:52:35 pm
23
1y
36
39%
12%
1
PETERSEN FLOYD F
DIR
AS
$17,391
500
---
7/1/22
---
$34.78
89,608
-0.6
D
10b
7/5/22 - 5:05:48 pm
24
1y
14
36%
2%
1
GERST DIANE G
DIR
OS
$180,110
5,146
---
6/30/22
---
$35.00
12,842
-28.6
D
10b
7/5/22 - 4:06:04 pm
25
    
 
GERST DIANE G
DIR
OE
$103,165
5,146
---
6/30/22
$20.03
$20.08
17,988
40.1
D
10b
7/5/22 - 4:06:04 pm
26
1y
38
45%
7%
2
PETERS WILLIAM J
CFO,VP,TR
OS
$642,591
18,386
---
6/30/22
---
$34.95
100,480
-15.5
D
10b
7/1/22 - 6:08:35 pm
27
    
 
PETERS WILLIAM J
CFO,VP,TR
OE
$274,871
18,386
---
6/30/22
---
$14.95
118,866
18.3
D
10b
7/1/22 - 6:08:35 pm
28
1y
38
45%
7%
2
PETERS WILLIAM J
CFO,VP,TR
AS
$176,682
5,512
---
6/17/22
---
$32.05
100,480
-5.2
D
10b
6/22/22 - 4:21:34 pm
29
    
 
LIAWATIDEWI YAKOB
VP
JS
$3,971
128
---
6/14/22
---
$31.02
61,607
-0.2
D
R
6/15/22 - 4:06:09 pm
30
    
 
ZASLOFF MICHAEL A
DIR
JB
---
4,163
---
6/10/22
---
---
51,369
8.8
D
R
6/14/22 - 5:31:33 pm
31
    
 
PRINS RICHARD K
DIR
JB
---
4,163
---
6/10/22
---
---
47,342
9.6
D
R
6/14/22 - 5:30:42 pm
32
    
 
PETERSEN FLOYD F
DIR
JB
---
4,163
---
6/10/22
---
---
90,108
4.8
D
R
6/14/22 - 5:29:19 pm
33
    
 
LEE HOWARD
DIR
JB
---
4,163
---
6/10/22
---
---
142,939
3.0
D
R
6/14/22 - 5:28:03 pm
34
    
 
GERST DIANE G
DIR
JB
---
4,163
---
6/10/22
---
---
12,842
48.0
D
R
6/14/22 - 5:26:55 pm
35
    
 
DEFLIN GAYLE
DIR
JB
---
4,163
---
6/10/22
---
---
10,182
69.2
D
R
6/14/22 - 5:25:51 pm
36
1y
11
27%
28%
2
LEE HOWARD
DIR
OS
$388,859
10,291
---
6/6/22
---
$37.79
138,776
-6.9
D
---
6/7/22 - 7:36:22 pm
37
    
 
LEE HOWARD
DIR
OE
$176,079
10,291
---
6/6/22
---
$17.11
149,067
7.4
D
---
6/7/22 - 7:36:22 pm
38
    
 
LIAWATIDEWI YAKOB
VP
JS
$9,971
264
---
6/4/22
---
$37.77
61,735
-0.4
D
R
6/6/22 - 4:59:08 pm
39
1y
36
39%
12%
1
PETERSEN FLOYD F
DIR
AS
$18,499
500
---
6/1/22
$36.79
$37.67
85,945
-0.6
D
10b
6/2/22 - 5:14:13 pm
40
1y
11
27%
28%
2
LEE HOWARD
DIR
OS
$349,323
10,000
---
5/23/22
---
$34.93
138,776
-6.7
D
---
5/25/22 - 8:21:04 pm
41
    
 
LEE HOWARD
DIR
OE
$171,100
10,000
---
5/23/22
---
$17.11
148,776
7.2
D
---
5/25/22 - 8:21:04 pm
42
1y
32
34%
15%
1
ZHANG JACK Y
CEO,DIR,BO
AS
$364,365
10,650
---
5/20/22
---
$34.21
2,104,143
-0.5
D
10b
5/23/22 - 4:05:46 pm
43
    
 
PETERS WILLIAM J
CFO,VP,TR
JS
$12,739
378
---
5/19/22
---
$33.70
104,609
-0.4
D
R
5/20/22 - 5:53:33 pm
44
1y
32
34%
15%
1
ZHANG JACK Y
CEO,DIR,BO
AS
$3,697,861
108,776
5/18/22
5/19/22
$33.76
$34.28
2,114,793
-4.9
D
10b
5/20/22 - 4:38:15 pm
45
1y
36
39%
12%
1
PETERSEN FLOYD F
DIR
OS
$347,826
9,924
---
5/18/22
---
$35.05
86,445
-10.3
D
---
5/19/22 - 5:58:51 pm
46
    
 
PETERSEN FLOYD F
DIR
OE
$347,179
20,291
---
5/18/22
---
$17.11
96,369
26.7
D
---
5/19/22 - 5:58:51 pm
47
    
 
PRINS RICHARD K
DIR
JS
---
2,000
---
5/17/22
---
---
43,179
-4.4
D
R
6/14/22 - 5:30:42 pm
48
1y
32
34%
15%
1
ZHANG JACK Y
CEO,DIR,BO
AS
$4,234,897
118,445
5/16/22
5/17/22
$35.58
$36.14
2,223,569
-5.1
D
10b
5/18/22 - 4:06:27 pm
49
1y
12
25%
12%
1
ZASLOFF MICHAEL A
DIR
OS
$366,500
10,291
---
5/16/22
---
$35.61
47,206
-17.9
D
---
5/17/22 - 7:46:52 pm
50
    
 
ZASLOFF MICHAEL A
DIR
OE
$176,079
10,291
---
5/16/22
---
$17.11
57,497
21.8
D
---
5/17/22 - 7:46:52 pm
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