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 B  AB  JB*  OB  OE*  OE
 S  AS  JS*  OS  OS*  3
 JB
 JS
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Detailed Insider History for:
NEWAMSTERDAM PHARMA CO N V: NAMS
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
$15.81 $27.29 $15.19 $1,736 110 964 0.0% 6.0% 99.42% 0.35%
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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
1
0%
-8%
9
TOPPER JAMES N
DIR
B
$25,521
1,135
---
3/26/25
---
$22.49
3,013,569
0.0
I
---
3/28/25 - 5:36:48 pm
2
    
 
KOOIJ LOUISE FREDERIKA
CAO
JB
---
8,269
---
3/26/25
---
---
23,269
55.1
D
R
3/28/25 - 5:29:55 pm
3
    
 
LANGE LOUIS G
DIR
JB
---
3,102
---
3/26/25
---
---
10,062
44.6
D
R
3/28/25 - 5:24:45 pm
4
    
 
KASTELEIN JOHANNES JACOB PIETER
DIR
JB
---
45,481
---
3/26/25
---
---
79,481
133.8
D
R
3/28/25 - 5:20:10 pm
5
    
 
KASTELEIN JOHANNES JACOB PIETER
DIR
JB
---
19,302
---
3/26/25
---
---
169,302
12.9
I
R
3/28/25 - 5:20:10 pm
6
    
 
KLING DOUGLAS F
COO
JS
---
16,539
---
3/26/25
---
---
44,000
-27.3
D
R
3/28/25 - 5:18:13 pm
7
    
 
KLING DOUGLAS F
COO
JB
---
16,539
---
3/26/25
---
---
60,539
37.6
D
R
3/28/25 - 5:18:13 pm
8
    
 
DAVIDSON MICHAEL H
CEO,DIR
JS
---
12,258
---
3/26/25
---
---
390,441
-3.0
D
R
3/28/25 - 5:15:18 pm
9
    
 
DAVIDSON MICHAEL H
CEO,DIR
JB
---
69,386
---
3/26/25
---
---
402,699
20.8
D
R
3/28/25 - 5:15:18 pm
10
    
 
KASTELEIN JOHANNES JACOB PIETER
DIR
JB
---
150,000
---
3/24/25
---
---
150,000
New
I
---
3/26/25 - 4:27:40 pm
11
    
 
KLING DOUGLAS F
COO
OS
---
100,000
---
3/17/25
---
---
44,000
-69.4
D
10b
3/19/25 - 5:29:57 pm
12
    
 
KLING DOUGLAS F
COO
JB
---
88,112
---
3/17/25
---
---
132,112
200.3
D
10b
3/19/25 - 5:29:57 pm
13
    
 
KLING DOUGLAS F
COO
OE
$118,880
11,888
---
3/17/25
---
$10.00
144,000
9.0
D
10b
3/19/25 - 5:29:57 pm
14
1y
1
0%
-8%
9
TOPPER JAMES N
DIR
B
$84,203
4,005
---
3/4/25
---
$21.02
3,012,434
0.1
I
---
3/6/25 - 5:32:07 pm
15
    
 
KOOIJ LOUISE FREDERIKA
CAO
S
$3,055,500
150,000
---
3/4/25
---
$20.37
15,000
-90.9
D
---
3/5/25 - 6:10:22 pm
16
    
 
KOOIJ LOUISE FREDERIKA
CAO
JB
---
150,000
---
3/4/25
---
---
165,000
1,000.0
D
---
3/5/25 - 6:10:22 pm
17
    
 
KLING DOUGLAS F
COO
JS
---
100,000
2/18/25
2/19/25
---
---
44,000
-69.4
D
10b
2/20/25 - 5:24:36 pm
18
    
 
KLING DOUGLAS F
COO
JB
---
100,000
2/18/25
2/19/25
---
---
134,782
287.5
D
10b
2/20/25 - 5:24:36 pm
19
    
 
KLING DOUGLAS F
COO
JS
---
70,441
1/29/25
1/30/25
---
---
44,000
-61.6
D
10b
1/31/25 - 5:00:12 pm
20
    
 
KLING DOUGLAS F
COO
JB
---
70,441
1/29/25
1/30/25
---
---
100,863
231.5
D
10b
1/31/25 - 5:00:12 pm
21
    
 
SOMAIYA MAYUR IAN
CFO
OS
---
61,883
1/27/25
1/28/25
---
---
38,000
-62.0
D
10b
1/29/25 - 5:25:01 pm
22
    
 
SOMAIYA MAYUR IAN
CFO
OE
$573,037
61,883
1/27/25
1/28/25
---
$9.26
84,983
267.9
D
10b
1/29/25 - 5:25:01 pm
23
    
 
KLING DOUGLAS F
COO
JS
---
129,559
1/27/25
1/28/25
---
---
44,000
-74.6
D
10b
1/29/25 - 5:16:00 pm
24
    
 
KLING DOUGLAS F
COO
JB
---
129,559
1/27/25
1/28/25
---
---
148,174
696.0
D
10b
1/29/25 - 5:16:00 pm
25
    
 
SMITHER JOHN W
DIR
JB
---
6,960
---
1/7/25
---
---
6,960
New
D
R
1/8/25 - 6:09:41 pm
26
    
 
MCKENNA MARK C
DIR
JB
---
6,960
---
1/7/25
---
---
6,960
New
D
R
1/8/25 - 6:08:10 pm
27
    
 
LEWIS WILLIAM
DIR
JB
---
6,960
---
1/7/25
---
---
6,960
New
D
R
1/8/25 - 6:03:34 pm
28
    
 
VAN DER KAMP HILDE JOHANNA
DIR
JB
---
6,960
---
1/7/25
---
---
6,960
New
D
R
1/8/25 - 5:58:40 pm
29
    
 
LANGE LOUIS G
DIR
JB
---
6,960
---
1/7/25
---
---
6,960
New
D
R
1/8/25 - 5:57:58 pm
30
    
 
KOOIJ LOUISE FREDERIKA
CAO
JB
---
15,000
---
1/7/25
---
---
15,000
New
D
R
1/7/25 - 5:21:48 pm
31
    
 
DAVIDSON MICHAEL H
CEO,DIR
JB
---
123,529
---
1/7/25
---
---
123,529
New
D
R
1/7/25 - 5:21:22 pm
32
    
 
KASTELEIN JOHANNES JACOB PIETER
DIR
JB
---
34,000
---
1/7/25
---
---
34,000
New
D
R
1/7/25 - 5:21:06 pm
33
    
 
AUDET JULIETTE BERANGERE
O
JB
---
14,000
---
1/7/25
---
---
15,104
1,268.1
D
R
1/7/25 - 5:15:41 pm
34
    
 
JONES WILLIAM A JR
O
JB
---
43,000
---
1/7/25
---
---
43,000
New
D
R
1/7/25 - 5:12:26 pm
35
    
 
KLING DOUGLAS F
COO
JB
---
44,000
---
1/7/25
---
---
44,000
New
D
R
1/7/25 - 5:10:29 pm
36
    
 
SOMAIYA MAYUR IAN
CFO
JB
---
38,000
---
1/7/25
---
---
38,000
New
D
R
1/7/25 - 5:08:12 pm
37
    
 
FORGROWTH NAP B V
BO
AS
$762,174
29,846
---
12/30/24
---
$25.54
10,656,172
-0.3
I
10b
1/2/25 - 4:15:04 pm
38
    
 
FORGROWTH NAP B V
BO
AS
$1,945,918
74,910
12/26/24
12/27/24
---
$25.95
10,686,018
-0.7
I
10b
12/30/24 - 4:15:03 pm
39
    
 
FORGROWTH NAP B V
BO
AS
$2,329,520
91,068
12/20/24
12/24/24
$25.49
$25.66
10,760,928
-0.8
I
10b
12/26/24 - 4:15:03 pm
40
    
 
FORGROWTH NAP B V
BO
AS
$4,066,714
157,234
12/18/24
12/19/24
---
$25.45
10,851,996
-1.4
I
10b
12/20/24 - 4:25:29 pm
41
    
 
FORGROWTH NAP B V
BO
AS
$2,996,156
115,480
12/16/24
12/17/24
$25.00
$26.45
11,009,230
-1.0
I
10b
12/18/24 - 4:15:03 pm
42
    
 
FORGROWTH NAP B V
BO
AS
$4,859,875
191,762
12/12/24
12/13/24
---
$25.01
11,124,710
-1.7
I
10b
12/16/24 - 4:15:03 pm
43
    
 
FORGROWTH NAP B V
BO
AS
$11,740,618
462,288
12/10/24
12/11/24
$25.22
$27.11
11,316,472
-3.9
I
10b
12/12/24 - 4:15:06 pm
44
    
 
FORGROWTH NAP B V
BO
AS
$1,047,876
41,803
11/15/24
11/18/24
$25.02
$25.08
11,778,760
-0.4
I
10b
11/19/24 - 4:15:06 pm
45
    
 
FORGROWTH NAP B V
BO
AS
$272,511
10,898
11/13/24
11/14/24
$25.00
$25.01
11,820,563
-0.1
I
10b
11/15/24 - 4:36:13 pm
46
    
 
KOOIJ LOUISE FREDERIKA
CAO
S
$707,400
45,000
---
10/1/24
---
$15.72
---
All
D
---
10/1/24 - 5:23:55 pm
47
    
 
KOOIJ LOUISE FREDERIKA
CAO
JB
---
45,000
---
9/27/24
---
---
45,000
New
D
---
10/1/24 - 5:23:55 pm
48
    
 
AUDET JULIETTE BERANGERE
O
B
$17,333
1,104
---
9/26/24
---
$15.70
1,104
New
D
---
9/30/24 - 5:22:34 pm
49
    
 
DAVIDSON MICHAEL H
CEO,DIR
B
$81,350
5,000
---
8/20/24
---
$16.27
209,784
2.4
D
---
8/22/24 - 4:30:12 pm
50
    
 
JOUSTRA WOUTER
DIR
3
---
---
---
7/16/24
---
---
---
---
---
---
7/19/24 - 4:30:04 pm
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