QTRX
QUANTERIX (QTRX)
NASDAQ
$3.47-$0.06 (-1.84%)
Price as of Jun 03, 2026 5:57 PM EDT
  • $144.1M
    Market Cap
  • -36.74%
    1-Year Change
  • Medical Devices
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
AMERIPRISE FINANCIAL INC
7.52%
3.5M
-1.5M (-41.04%)
Mar 31, 2026
BLACKROCK, INC.
6.96%
3.3M
-98,315 (-3.00%)
Mar 31, 2026
BLACKROCK FUNDING, INC. /DE
6.72%
3.2M
-46,695 (-1.48%)
Dec 31, 2024
BLACKROCK INC.
6.66%
3.1M
+14,954 (+0.48%)
Jun 30, 2024
PORTOLAN CAPITAL MANAGEMENT, LLC
6.25%
2.9M
-1.6M (-53.63%)
Mar 31, 2026
VANGUARD GROUP INC
5.68%
2.7M
+30,318 (+1.13%)
Dec 31, 2025
BLUE WATER LIFE SCIENCE ADVISORS, LP
4.55%
2.1M
+50,000 (+2.33%)
Mar 31, 2026

Current Ownership Distribution

  • Institutions598.4M (75.07%)
  • Mutual Funds187.3M (23.49%)
  • Insiders11.5M (1.44%)
  • Other0 (0.00%)

Insider Transactions

  • 1.44% (11.5M)
    Current InsiderOwnership (%, shares)
  • 3
    Number of InsiderBuying (last 12 months)
  • $41.0M
    Amount of InsiderBuying (last 12 months)
  • 0
    Number of InsiderSelling (last 12 months)
  • $0.00
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Miller Michael Francis
Chief Technology Officer
Exempt
May 31, 2026
$0.00
130
$0.00
419
Miller Michael Francis
Chief Technology Officer
Exempt
May 31, 2026
$0.00
130
$0.00
33,834
Miller Michael Francis
Chief Technology Officer
In Kind
May 31, 2026
$119.34
39
$3.06
33,795
Sriram Vandana
Chief Financial Officer
Exempt
May 15, 2026
$0.00
263
$0.00
3,945
Miller Michael Francis
Chief Technology Officer
Exempt
May 15, 2026
$0.00
81
$0.00
760
Sriram Vandana
Chief Financial Officer
Exempt
May 15, 2026
$0.00
514
$0.00
10,797
Miller Michael Francis
Chief Technology Officer
Exempt
May 15, 2026
$0.00
136
$0.00
1,389
Sriram Vandana
Chief Financial Officer
Exempt
May 15, 2026
$0.00
1,056
$0.00
34,866
Miller Michael Francis
Chief Technology Officer
Exempt
May 15, 2026
$0.00
135
$0.00
2,846
Sriram Vandana
Chief Financial Officer
Exempt
May 15, 2026
$0.00
263
$0.00
28,976
Miller Michael Francis
Chief Technology Officer
Exempt
May 15, 2026
$0.00
372
$0.00
8,945
Sriram Vandana
Chief Financial Officer
In Kind
May 15, 2026
$217.25
79
$2.75
28,897
Miller Michael Francis
Chief Technology Officer
Exempt
May 15, 2026
$0.00
834
$0.00
27,525
Sriram Vandana
Chief Financial Officer
Exempt
May 15, 2026
$0.00
514
$0.00
29,411
Miller Michael Francis
Chief Technology Officer
Exempt
May 15, 2026
$0.00
81
$0.00
32,694
Sriram Vandana
Chief Financial Officer
In Kind
May 15, 2026
$423.50
154
$2.75
29,257
Miller Michael Francis
Chief Technology Officer
In Kind
May 15, 2026
$68.75
25
$2.75
32,669
Sriram Vandana
Chief Financial Officer
Exempt
May 15, 2026
$0.00
1,056
$0.00
30,313
Miller Michael Francis
Chief Technology Officer
Exempt
May 15, 2026
$0.00
136
$0.00
32,805
Sriram Vandana
Chief Financial Officer
In Kind
May 15, 2026
$866.25
315
$2.75
29,998
Miller Michael Francis
Chief Technology Officer
In Kind
May 15, 2026
$112.75
41
$2.75
32,764
Miller Michael Francis
Chief Technology Officer
Exempt
May 15, 2026
$0.00
135
$0.00
32,899
Miller Michael Francis
Chief Technology Officer
In Kind
May 15, 2026
$112.75
41
$2.75
32,858
Miller Michael Francis
Chief Technology Officer
Exempt
May 15, 2026
$0.00
372
$0.00
33,230
Miller Michael Francis
Chief Technology Officer
In Kind
May 15, 2026
$305.25
111
$2.75
33,119
Miller Michael Francis
Chief Technology Officer
Exempt
May 15, 2026
$0.00
834
$0.00
33,953
Miller Michael Francis
Chief Technology Officer
In Kind
May 15, 2026
$684.75
249
$2.75
33,704
Miller Michael Francis
Chief Operating Officer
Exempt
Apr 30, 2026
$0.00
130
$0.00
549
Miller Michael Francis
Chief Operating Officer
Exempt
Apr 30, 2026
$0.00
130
$0.00
32,652
Miller Michael Francis
Chief Operating Officer
In Kind
Apr 30, 2026
$122.07
39
$3.13
32,613