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Detailed Insider History for:
MERSANA THERAPEUTICS INC: MRSN
Price: 10/24/25 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
$9.78 $70.75 $5.21 $49 5 78 0.0% 6.6% 62.31% 1.46%
Exch Sector Industry Sub-Industry
NasdaqGS Manufacturing Chemicals And Allied Products Pharmaceutical Preparations
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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
    
 
BALA MOHAN
VP
AS
$762
77
---
10/27/25
---
$9.90
2,922
-2.6
D
R,10b
10/28/25 - 4:10:09 pm
2
    
 
BALA MOHAN
VP
JB
---
250
---
10/25/25
---
---
2,999
9.1
D
R,10b
10/28/25 - 4:10:09 pm
3
1y
1
0%
238%
3
HUBER MARTIN H JR
PR,CEO,DIR
AS
$14,708
2,012
---
9/12/25
---
$7.31
9,572
-17.4
D
R,10b
9/15/25 - 4:26:13 pm
4
    
 
HUBER MARTIN H JR
PR,CEO,DIR
JB
---
6,670
---
9/11/25
---
---
11,584
135.7
D
R,10b
9/15/25 - 4:26:13 pm
5
    
 
MANDELIA ASHISH
VP,CAO
AS
$2,061
3,554
---
1/16/25
---
$0.58
57,519
-5.8
D
R,10b
1/17/25 - 7:27:39 pm
6
1y
4
100%
-60%
3
PROTOPAPAS ANNA
DIR
AS
$5,009
8,637
---
1/16/25
---
$0.58
168,041
-4.9
D
R,10b
1/17/25 - 7:26:45 pm
7
1y
18
89%
-44%
1
LOWINGER TIMOTHY B
VP,CTO
AS
$4,668
8,048
---
1/16/25
---
$0.58
257,673
-3.0
D
R,10b
1/17/25 - 7:25:05 pm
8
1y
1
0%
238%
3
HUBER MARTIN H JR
PR,CEO,DIR
AS
$2,618
4,514
---
1/16/25
---
$0.58
122,875
-3.5
D
R,10b
1/17/25 - 7:21:15 pm
9
    
 
DESCHUYTNER BRIAN
VP,COO,CFO
AS
$4,913
8,470
---
1/16/25
---
$0.58
121,393
-6.5
D
R,10b
1/17/25 - 7:20:02 pm
10
1y
5
60%
32%
2
CARVAJAL ALEJANDRA
VP,LO
AS
$2,956
5,096
---
1/16/25
---
$0.58
78,296
-6.1
D
R,10b
1/17/25 - 7:18:50 pm
11
    
 
BALA MOHAN
VP
AS
$3,445
5,939
---
1/16/25
---
$0.58
68,872
-7.9
D
R,10b
1/17/25 - 7:18:07 pm
12
    
 
MANDELIA ASHISH
VP,CAO
JB
---
8,685
---
1/15/25
---
---
61,073
16.6
D
R,10b
1/17/25 - 7:27:39 pm
13
    
 
PROTOPAPAS ANNA
DIR
JB
---
21,250
---
1/15/25
---
---
176,678
13.7
D
R,10b
1/17/25 - 7:26:45 pm
14
    
 
LOWINGER TIMOTHY B
VP,CTO
JB
---
19,791
---
1/15/25
---
---
265,721
8.0
D
R,10b
1/17/25 - 7:25:05 pm
15
    
 
HUBER MARTIN H JR
PR,CEO,DIR
JB
---
11,062
---
1/15/25
---
---
127,389
9.5
D
R,10b
1/17/25 - 7:21:15 pm
16
    
 
DESCHUYTNER BRIAN
VP,COO,CFO
JB
---
20,833
---
1/15/25
---
---
129,863
19.1
D
R,10b
1/17/25 - 7:20:02 pm
17
    
 
CARVAJAL ALEJANDRA
VP,LO
JB
---
12,500
---
1/15/25
---
---
83,392
17.6
D
R,10b
1/17/25 - 7:18:50 pm
18
    
 
BALA MOHAN
VP
JB
---
14,583
---
1/15/25
---
---
74,811
24.2
D
R,10b
1/17/25 - 7:18:07 pm
19
1y
4
100%
-60%
3
PROTOPAPAS ANNA
DIR
AS
$3,900
6,191
---
1/15/25
---
$0.63
155,428
-3.8
D
R,10b
1/16/25 - 5:25:34 pm
20
    
 
MANDELIA ASHISH
VP,CAO
AS
$1,128
1,791
---
1/15/25
---
$0.63
52,388
-3.3
D
R,10b
1/16/25 - 5:25:10 pm
21
1y
18
89%
-44%
1
LOWINGER TIMOTHY B
VP,CTO
AS
$1,130
1,794
---
1/15/25
---
$0.63
245,930
-0.7
D
R,10b
1/16/25 - 5:24:40 pm
22
    
 
DESCHUYTNER BRIAN
VP,COO,CFO
AS
$1,469
2,331
---
1/15/25
---
$0.63
109,030
-2.1
D
R,10b
1/16/25 - 5:23:58 pm
23
1y
5
60%
32%
2
CARVAJAL ALEJANDRA
VP,LO
AS
$600
952
---
1/15/25
---
$0.63
70,892
-1.3
D
R,10b
1/16/25 - 5:23:27 pm
24
    
 
PROTOPAPAS ANNA
DIR
JB
---
16,750
---
1/14/25
---
---
161,619
11.6
D
R,10b
1/16/25 - 5:25:34 pm
25
    
 
MANDELIA ASHISH
VP,CAO
JB
---
4,783
---
1/14/25
---
---
54,179
9.7
D
R,10b
1/16/25 - 5:25:10 pm
26
    
 
LOWINGER TIMOTHY B
VP,CTO
JB
---
4,792
---
1/14/25
---
---
247,724
2.0
D
R,10b
1/16/25 - 5:24:40 pm
27
    
 
DESCHUYTNER BRIAN
VP,COO,CFO
JB
---
6,250
---
1/14/25
---
---
111,361
5.9
D
R,10b
1/16/25 - 5:23:58 pm
28
    
 
CARVAJAL ALEJANDRA
VP,LO
JB
---
2,500
---
1/14/25
---
---
71,844
3.6
D
R,10b
1/16/25 - 5:23:27 pm
29
1y
4
100%
-60%
3
PROTOPAPAS ANNA
DIR
AS
$7,612
11,534
---
1/14/25
---
$0.66
144,869
-7.4
D
R,10b
1/15/25 - 9:20:28 pm
30
    
 
MANDELIA ASHISH
VP,CAO
AS
$665
1,007
---
1/14/25
---
$0.66
49,396
-2.0
D
R,10b
1/15/25 - 9:19:25 pm
31
1y
18
89%
-44%
1
LOWINGER TIMOTHY B
VP,CTO
AS
$2,299
3,483
---
1/14/25
---
$0.66
242,932
-1.4
D
R,10b
1/15/25 - 9:18:49 pm
32
    
 
DESCHUYTNER BRIAN
VP,COO,CFO
AS
$2,451
3,713
---
1/14/25
---
$0.66
105,111
-3.4
D
R,10b
1/15/25 - 9:17:42 pm
33
1y
5
60%
32%
2
CARVAJAL ALEJANDRA
VP,LO
AS
$2,198
3,330
---
1/14/25
---
$0.66
69,344
-4.6
D
R,10b
1/15/25 - 9:17:06 pm
34
    
 
BALA MOHAN
VP
AS
$2,147
3,253
---
1/14/25
---
$0.66
60,228
-5.1
D
R,10b
1/15/25 - 9:16:15 pm
35
    
 
PROTOPAPAS ANNA
DIR
JB
---
31,250
---
1/13/25
---
---
156,403
25.0
D
R,10b
1/15/25 - 9:20:28 pm
36
    
 
MANDELIA ASHISH
VP,CAO
JB
---
2,646
---
1/13/25
---
---
50,403
5.5
D
R,10b
1/15/25 - 9:19:25 pm
37
    
 
LOWINGER TIMOTHY B
VP,CTO
JB
---
9,375
---
1/13/25
---
---
246,415
4.0
D
R,10b
1/15/25 - 9:18:49 pm
38
    
 
DESCHUYTNER BRIAN
VP,COO,CFO
JB
---
10,000
---
1/13/25
---
---
108,824
10.1
D
R,10b
1/15/25 - 9:17:42 pm
39
    
 
CARVAJAL ALEJANDRA
VP,LO
JB
---
8,958
---
1/13/25
---
---
72,674
14.1
D
R,10b
1/15/25 - 9:17:06 pm
40
    
 
BALA MOHAN
VP
JB
---
8,750
---
1/13/25
---
---
63,481
16.0
D
R,10b
1/15/25 - 9:16:15 pm
41
    
 
NEXTECH CROSSOVER I SCSP
BO
3
---
---
---
12/20/24
---
---
12,067,246
---
D
---
12/30/24 - 4:12:17 pm
42
    
 
ECOR1 CAPITAL LLC
BO
JS
---
8,036,688
---
12/19/24
---
---
11,328,000
-41.5
I
---
12/23/24 - 7:42:08 pm
43
    
 
BALA MOHAN
VP
AS
$3,580
1,884
---
10/28/24
---
$1.90
54,731
-3.3
D
R,10b
10/29/24 - 4:43:42 pm
44
    
 
BALA MOHAN
VP
JB
---
6,250
---
10/25/24
---
---
56,615
12.4
D
R,10b
10/29/24 - 4:43:42 pm
45
    
 
DESCHUYTNER BRIAN
VP,COO,CFO
AS
$27,150
13,687
10/2/24
10/3/24
---
$1.96
94,824
-12.6
D
R,10b
10/7/24 - 5:48:47 pm
46
1y
5
60%
32%
2
CARVAJAL ALEJANDRA
VP,LO
AS
$27,150
13,687
10/2/24
10/3/24
---
$1.96
63,716
-17.7
D
R,10b
10/7/24 - 5:48:21 pm
47
    
 
BALA MOHAN
VP
AS
$27,150
13,687
10/2/24
10/3/24
---
$1.96
50,365
-21.4
D
R,10b
10/7/24 - 5:47:51 pm
48
    
 
MANDELIA ASHISH
VP,CAO
AS
$16,298
8,216
10/2/24
10/3/24
---
$1.96
47,757
-14.7
D
R,10b
10/7/24 - 5:47:18 pm
49
1y
18
89%
-44%
1
LOWINGER TIMOTHY B
VP,CTO
AS
$27,150
13,687
10/2/24
10/3/24
---
$1.96
235,642
-5.5
D
R,10b
10/7/24 - 5:46:19 pm
50
    
 
DESCHUYTNER BRIAN
VP,COO,CFO
JB
---
50,000
---
10/1/24
---
---
108,511
85.5
D
R,10b
10/7/24 - 5:48:47 pm
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