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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:
Y MABS THERAPEUTICS INC: YMAB
Price: 9/19/25 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
$8.61 $16.11 $3.55 $391 45 919 0.0% 4.8% 82.78% 11.97%
Exch Sector Industry Sub-Industry
NasdaqGS Manufacturing Chemicals And Allied Products Pharmaceutical Preparations
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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
    
 
HAMILL LAURA
DIR
JS
$50,095
30,905
---
9/16/25
---
$8.60
---
All
D
R
9/19/25 - 6:00:15 am
2
    
 
WG BIOTECH APS
DIR,BO
JS
$39,209,404
4,559,233
---
9/16/25
---
$8.60
---
All
D
---
9/18/25 - 9:39:55 pm
3
    
 
GILL DAVID N
DIR
JS
$50,095
30,905
---
9/16/25
---
$8.60
---
All
D
R
9/18/25 - 9:27:10 pm
4
    
 
TYAGI ASHU
DIR
JS
$50,095
30,905
---
9/16/25
---
$8.60
---
All
D
R
9/18/25 - 9:24:36 pm
5
    
 
GAD THOMAS
DIR
JS
$1,098,057
127,681
---
9/16/25
---
$8.60
---
All
I
R
9/18/25 - 9:12:33 pm
6
    
 
GAD THOMAS
DIR
JS
$2,111,180
305,721
---
9/16/25
---
$8.60
---
All
D
R
9/18/25 - 9:12:33 pm
7
    
 
PFREUNDSCHUH PETER P
VP,CFO,TR
JS
---
77,800
---
9/16/25
---
---
---
All
D
R
9/18/25 - 9:09:41 pm
8
    
 
ROSSI MICHAEL J
PR,CEO,DIR
JS
$68,645
137,083
---
9/16/25
---
$8.60
---
All
D
R
9/18/25 - 9:08:14 pm
9
    
 
WILMS JORIS
VP,COO
JS
$110,071
52,100
---
9/16/25
---
$8.60
---
All
D
R
9/18/25 - 9:06:30 pm
10
    
 
WEDELL WEDELLSBORG JOHAN
DIR,BO
JS
$39,209,404
4,559,233
---
9/16/25
---
$8.60
---
All
I
R
9/18/25 - 9:03:47 pm
11
    
 
WEDELL WEDELLSBORG JOHAN
DIR,BO
JS
$50,095
30,905
---
9/16/25
---
$8.60
---
All
D
R
9/18/25 - 9:03:47 pm
12
    
 
LAROCCA JOHN
VP,GC
JS
---
21,500
---
9/16/25
---
---
---
All
D
R
9/18/25 - 9:01:12 pm
13
    
 
HEALY JAMES
DIR
JS
$271,786
56,683
---
9/16/25
---
$8.60
---
All
D
R
9/18/25 - 8:59:46 pm
14
    
 
HEALY JAMES
DIR
JS
$18,870,790
2,194,278
---
9/16/25
---
$8.60
---
All
I
R
9/18/25 - 8:59:46 pm
15
    
 
HAMILL LAURA
DIR
JB
---
25,080
---
6/30/25
---
---
30,905
430.6
D
R
7/2/25 - 4:20:27 pm
16
    
 
TYAGI ASHU
DIR
JB
---
25,080
---
6/30/25
---
---
30,905
430.6
D
R
7/2/25 - 4:20:24 pm
17
    
 
WEDELL WEDELLSBORG JOHAN
DIR,BO
JB
---
25,080
---
6/30/25
---
---
30,905
430.6
D
R
7/2/25 - 4:20:21 pm
18
    
 
HEALY JAMES
DIR
JB
---
25,080
---
6/30/25
---
---
56,683
79.4
D
R
7/2/25 - 4:20:19 pm
19
    
 
GILL DAVID N
DIR
JB
---
25,080
---
6/30/25
---
---
30,905
430.6
D
R
7/2/25 - 4:20:15 pm
20
1y
2
50%
-10%
1
GAD THOMAS
DIR
OB
$206,000
103,000
---
6/3/25
---
$2.00
305,721
50.8
D
---
6/5/25 - 7:17:49 pm
21
    
 
ROSSI MICHAEL J
PR,CEO,DIR
S
$20,368
3,917
---
3/7/25
---
$5.20
137,083
-2.8
D
R
3/11/25 - 8:17:08 pm
22
1y
95
73%
-21%
1
GAD THOMAS
DIR
S
$56,536
10,810
---
3/7/25
---
$5.23
202,721
-5.1
D
R
3/11/25 - 8:15:41 pm
23
    
 
PFREUNDSCHUH PETER P
CFO,TR
JB
---
31,800
---
1/17/25
---
---
77,800
69.1
D
R
1/22/25 - 7:05:55 pm
24
    
 
GAD THOMAS
DIR
JB
---
32,000
---
1/17/25
---
---
213,531
17.6
D
R
1/22/25 - 7:04:08 pm
25
    
 
WILMS JORIS
VP,COO
JB
---
21,500
---
1/17/25
---
---
52,100
70.3
D
R
1/22/25 - 7:01:16 pm
26
    
 
ROSSI MICHAEL J
PR,CEO,DIR
JB
---
105,300
---
1/17/25
---
---
141,000
295.0
D
R
1/22/25 - 7:00:02 pm
27
    
 
LAROCCA JOHN
VP,GC
JB
---
21,500
---
1/17/25
---
---
21,500
New
D
R
1/22/25 - 6:57:56 pm
28
    
 
GENTILCORE DOUGLAS J
VP
3
---
---
---
1/7/25
---
---
---
---
---
---
1/17/25 - 4:18:52 pm
29
    
 
LAROCCA JOHN
VP,GC
3
---
---
---
1/6/25
---
---
---
---
---
---
1/16/25 - 4:44:32 pm
30
1y
2
50%
-10%
1
GAD THOMAS
DIR
OB
$100,000
22,831
---
9/19/24
---
$4.38
181,531
14.4
D
---
9/20/24 - 4:15:04 pm
31
1y
95
73%
-21%
1
GAD THOMAS
DIR
S
$1,264,650
95,000
9/13/24
9/16/24
---
$12.97
67,681
-58.4
I
---
9/17/24 - 8:05:37 pm
32
    
 
LUND HANSEN TORBEN
VP,CTO
OS
$768,500
50,000
---
8/28/24
---
$15.37
35,600
-58.4
D
---
8/30/24 - 4:15:06 pm
33
    
 
LUND HANSEN TORBEN
VP,CTO
OE
$219,000
50,000
---
8/28/24
---
$4.38
85,600
140.4
D
---
8/30/24 - 4:15:06 pm
34
    
 
WILMS JORIS
VP,COO
S
$73,450
5,000
---
8/26/24
---
$14.69
30,600
-14.0
D
---
8/27/24 - 5:05:52 pm
35
    
 
PFREUNDSCHUH PETER P
CFO,TR
JB
---
46,000
---
7/12/24
---
---
46,000
New
D
R
7/12/24 - 5:29:54 pm
36
    
 
PFREUNDSCHUH PETER P
CFO,TR
3
---
---
---
6/28/24
---
---
---
---
---
---
7/8/24 - 7:59:14 pm
37
    
 
TAGLIAFERRI MARY
DIR
JB
---
3,495
---
6/11/24
---
---
8,155
75.0
D
R
6/13/24 - 9:02:27 pm
38
    
 
HAMILL LAURA
DIR
JB
---
3,495
---
6/11/24
---
---
5,825
150.0
D
R
6/13/24 - 9:02:01 pm
39
    
 
WEDELL WEDELLSBORG JOHAN
DIR,BO
JB
---
3,495
---
6/11/24
---
---
5,825
150.0
D
R
6/13/24 - 9:01:37 pm
40
    
 
HEALY JAMES
DIR
JB
---
3,495
---
6/11/24
---
---
31,603
12.4
D
R
6/13/24 - 9:01:12 pm
41
    
 
GILL DAVID N
DIR
JB
---
3,495
---
6/11/24
---
---
5,825
150.0
D
R
6/13/24 - 9:00:37 pm
42
    
 
TYAGI ASHU
DIR
JB
---
3,495
---
6/11/24
---
---
5,825
150.0
D
R
6/13/24 - 9:00:12 pm
43
1y
95
73%
-21%
1
GAD THOMAS
DIR
S
$420,000
35,000
---
6/11/24
---
$12.00
162,681
-17.7
I
---
6/11/24 - 7:53:11 pm
44
    
 
BER GERARD
DIR
S
$8,664
722
---
6/10/24
---
$12.00
1,608
-31.0
D
R
6/11/24 - 7:54:20 pm
45
1y
95
73%
-21%
1
GAD THOMAS
DIR
S
$421,050
35,000
---
6/10/24
---
$12.03
197,681
-15.0
I
---
6/11/24 - 7:53:11 pm
46
1y
95
73%
-21%
1
GAD THOMAS
DIR
S
$395,563
32,351
5/21/24
5/23/24
$12.00
$13.00
232,681
-12.2
I
---
5/23/24 - 6:54:43 pm
47
    
 
TAGLIAFERRI MARY
DIR
JB
---
4,660
---
3/12/24
---
---
4,660
New
D
R
3/14/24 - 5:01:25 pm
48
    
 
RAJAH VIGNESH
VP
S
$28,283
1,711
---
3/5/24
---
$16.53
33,889
-4.8
D
R
3/7/24 - 5:02:07 pm
49
1y
95
73%
-21%
1
GAD THOMAS
DIR
S
$64,116
3,900
---
3/5/24
---
$16.44
158,700
-2.4
D
R
3/7/24 - 5:01:09 pm
50
    
 
SMITH SUSAN LAURA
VP
S
$27,837
1,682
---
3/5/24
---
$16.55
33,918
-4.7
D
R
3/7/24 - 4:59:59 pm
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