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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:
QUANTERIX CORP: QTRX
Price: 6/27/25 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
$6.65 $16.74 $4.05 $258 39 799 0.0% 8.9% 89.70% 7.66%
Exch Sector Industry Sub-Industry
NasdaqGM Manufacturing Measuring, Analyzing, And Controlling Instruments; Photographic, Medical And Optical Goods; Watches And Clocks Laboratory Analytical Instruments
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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
    
 
MEISTER PAUL M
DIR
JB
$14,999
2,242
---
7/1/25
---
$6.69
309,279
0.7
D
R
7/2/25 - 5:39:38 pm
2
    
 
DONNELLY WILLIAM P
DIR
JB
$28,125
4,204
---
7/1/25
---
$6.69
143,298
3.0
D
R
7/2/25 - 5:37:17 pm
3
    
 
WALT DAVID R
DIR
JB
$14,370
2,148
---
7/1/25
---
$6.69
1,869,081
0.1
D
R
7/2/25 - 5:35:30 pm
4
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$1,689
254
---
6/30/25
---
$6.65
517,426
-0.0
D
R
7/2/25 - 4:27:21 pm
5
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$7,527
1,242
---
6/15/25
---
$6.06
517,680
-0.2
D
R
6/17/25 - 5:18:28 pm
6
    
 
SRIRAM VANDANA
CFO
JS
$1,388
229
---
6/15/25
---
$6.06
83,508
-0.3
D
R
6/17/25 - 5:18:15 pm
7
1y
3
100%
166%
4
WALT DAVID R
DIR
JB*
$760,803
123,990
---
6/13/25
---
$6.14
1,866,933
7.1
D
R
6/13/25 - 4:39:15 pm
8
1y
3
100%
166%
4
WALT DAVID R
DIR
B
$224,166
36,010
---
6/12/25
---
$6.23
1,742,943
2.1
D
R
6/13/25 - 4:39:15 pm
9
    
 
TOLOUE MASOUD
PR,CEO,DIR
B
$248,723
45,900
---
6/9/25
---
$5.42
518,922
9.7
D
R
6/10/25 - 4:08:44 pm
10
1y
3
100%
166%
4
WALT DAVID R
DIR
B
$1,133,796
210,000
6/6/25
6/9/25
---
$5.34
1,706,933
14.0
D
R
6/9/25 - 5:44:04 pm
11
1y
1
0%
-50%
3
DONNELLY WILLIAM P
DIR
B
$506,349
93,113
---
6/6/25
---
$5.44
139,094
202.5
D
R
6/9/25 - 5:10:15 pm
12
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$1,321
254
---
5/31/25
---
$5.20
473,022
-0.1
D
R
6/3/25 - 4:19:47 pm
13
    
 
SRIRAM VANDANA
CFO
JS
$1,031
229
---
5/15/25
---
$4.50
83,737
-0.3
D
R
5/19/25 - 9:15:12 am
14
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$5,589
1,242
---
5/15/25
---
$4.50
473,276
-0.3
D
R
5/19/25 - 9:14:18 am
15
    
 
SRIRAM VANDANA
CFO
JS
$1,227
229
---
4/15/25
---
$5.36
83,966
-0.3
D
R
4/17/25 - 4:01:34 pm
16
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$6,409
1,242
---
4/15/25
---
$5.16
474,772
-0.3
D
R
4/17/25 - 4:01:12 pm
17
    
 
WALT DAVID R
DIR
JB
$14,370
2,156
---
4/1/25
---
$6.66
1,496,933
0.1
D
R
4/3/25 - 4:15:18 pm
18
    
 
MEISTER PAUL M
DIR
JB
$16,523
2,479
---
4/1/25
---
$6.66
307,037
0.8
D
R
4/3/25 - 4:14:59 pm
19
    
 
HLAVINKA SARAH E
DIR
JB
$17,496
2,625
---
4/1/25
---
$6.66
57,455
4.8
D
R
4/3/25 - 4:14:45 pm
20
    
 
DONNELLY WILLIAM P
DIR
JB
$17,869
2,681
---
4/1/25
---
$6.66
45,981
6.2
D
R
4/3/25 - 4:14:31 pm
21
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$1,654
254
---
3/31/25
---
$6.51
476,014
-0.1
D
R
4/2/25 - 4:52:49 pm
22
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$8,769
1,242
---
3/15/25
---
$7.06
476,268
-0.3
D
R
3/18/25 - 6:25:21 pm
23
    
 
SRIRAM VANDANA
CFO
JS
$1,617
229
---
3/15/25
---
$7.06
84,195
-0.3
D
R
3/18/25 - 6:22:40 pm
24
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$1,875
247
---
2/28/25
---
$7.59
477,510
-0.1
D
R
3/4/25 - 4:03:20 pm
25
    
 
SRIRAM VANDANA
CFO
JS
$741
92
---
2/15/25
---
$8.05
84,424
-0.1
D
R
2/19/25 - 4:13:48 pm
26
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$6,054
752
---
2/15/25
---
$8.05
477,757
-0.2
D
R
2/19/25 - 4:13:28 pm
27
    
 
SRIRAM VANDANA
CFO
JB
---
50,712
---
2/4/25
---
---
84,516
150.0
D
R
2/6/25 - 5:01:04 pm
28
    
 
TOLOUE MASOUD
PR,CEO,DIR
JB
---
138,790
---
2/4/25
---
---
478,509
40.9
D
R
2/6/25 - 5:00:43 pm
29
    
 
SRIRAM VANDANA
CFO
JS
$19,906
2,166
---
2/2/25
---
$9.19
33,804
-6.0
D
R
2/4/25 - 9:39:46 pm
30
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$58,586
6,375
1/31/25
2/2/25
---
$9.19
339,719
-1.8
D
R
2/4/25 - 9:33:21 pm
31
    
 
SRIRAM VANDANA
CFO
JS
$802
93
---
1/15/25
---
$8.62
35,970
-0.3
D
R
1/17/25 - 4:05:20 pm
32
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$7,810
906
---
1/15/25
---
$8.62
346,094
-0.3
D
R
1/17/25 - 4:05:02 pm
33
    
 
WALT DAVID R
DIR
JB
---
7,435
---
1/2/25
---
---
1,494,777
0.5
D
R
1/6/25 - 5:58:37 pm
34
    
 
MAGOVCEVIC LIEBISCH IVANA
DIR
JB
---
7,435
---
1/2/25
---
---
20,235
58.1
D
R
1/6/25 - 5:57:04 pm
35
    
 
MADAUS MARTIN D
DIR
JB
---
7,435
---
1/2/25
---
---
36,908
25.2
D
R
1/6/25 - 5:55:49 pm
36
    
 
ELLIOTT JEFFREY THOMAS
DIR
JB
---
7,435
---
1/2/25
---
---
19,420
62.0
D
R
1/6/25 - 5:49:36 pm
37
    
 
FLYNN KAREN
DIR
JB
---
7,435
---
1/2/25
---
---
33,840
28.2
D
R
1/6/25 - 5:48:22 pm
38
    
 
MEISTER PAUL M
DIR
JB
$14,999
8,829
---
1/2/25
---
$10.76
304,558
3.0
D
R
1/6/25 - 5:45:00 pm
39
    
 
HLAVINKA SARAH E
DIR
JB
$14,999
8,829
---
1/2/25
---
$10.76
54,830
19.2
D
R
1/6/25 - 5:41:15 pm
40
    
 
DONNELLY WILLIAM P
DIR
JB
$13,794
8,717
---
1/2/25
---
$10.76
43,300
25.2
D
R
1/6/25 - 5:38:13 pm
41
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$4,411
415
---
12/31/24
---
$10.63
347,000
-0.1
D
R
1/2/25 - 6:15:57 pm
42
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$8,031
752
---
12/15/24
---
$10.68
347,415
-0.2
D
R
12/17/24 - 6:13:01 pm
43
    
 
SRIRAM VANDANA
CFO
JS
$801
75
---
12/15/24
---
$10.68
36,063
-0.2
D
R
12/17/24 - 6:12:48 pm
44
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$4,537
368
---
11/30/24
---
$12.33
348,167
-0.1
D
R
12/2/24 - 4:20:36 pm
45
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$12,813
1,120
---
11/15/24
---
$11.44
348,535
-0.3
D
R
11/18/24 - 6:10:22 pm
46
    
 
SRIRAM VANDANA
CFO
JS
$892
78
---
11/15/24
---
$11.44
36,138
-0.2
D
R
11/18/24 - 6:09:24 pm
47
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$4,865
368
---
10/31/24
---
$13.22
349,655
-0.1
D
R
10/31/24 - 6:56:37 pm
48
    
 
TOLOUE MASOUD
PR,CEO,DIR
JS
$13,978
1,120
---
10/15/24
---
$12.48
350,023
-0.3
D
R
10/16/24 - 6:56:36 pm
49
    
 
SRIRAM VANDANA
CFO
JS
$973
78
---
10/15/24
---
$12.48
36,216
-0.2
D
R
10/16/24 - 6:56:02 pm
50
    
 
MAGOVCEVIC LIEBISCH IVANA
DIR
JB
---
12,800
---
10/2/24
---
---
12,800
New
D
R
10/3/24 - 5:17:37 pm
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