13F Insight
DOSSIER · 13F Holders · Q4 2025Most-boughtAI cap-ex
QTRX

Quanterix Corp

138 institutions still hold Quanterix Corp as of Q4 2025. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 74766q101·138 13F holders·last filed Dec 31, 2025
Market cap
—
▲ 7.2%
vs prior quarter
13F value held
$125M
47.0% inst. owned
of float
Holders
138
-32 QoQ
filers reporting
Activity
+73 / −54
+885 added · −897 reduced
this quarter
Concentration
23.05%
Portolan Capital Management, LLC #1
top holder share
AI Holders Summary · Q4 2025

138 institutions reported QTRX in Q4 2025. Portolan Capital Management, LLC leads at 23.1% of the visible book. -32 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
Portolan Capital Management, LLC
CIK 0001350290
$29M4.5M1.54%Q4 202502
AMERIPRISE FINANCIAL INC
CIK 0000820027
$12M3.5M0.00%Q1 202603
BlackRock, Inc.
CIK 0002012383
$12M3.3M0.00%Q1 202604
Invenomic Capital Management LP
CIK 0001769456
$10M1.5M0.45%Q4 202505
Blue Water Life Science Advisors, LP
CIK 0001789778
$8M2.1M6.05%Q1 202606
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
CIK 0001644956
$7M2.1M0.02%Q1 202607
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$6M1.8M0.00%Q1 202608
Kent Lake PR LLC
CIK 0002037231
$5M1.0M2.75%Q3 202509
LEVIN CAPITAL STRATEGIES, L.P.
CIK 0001354821
$5M1.5M0.39%Q1 202610
First Eagle Investment Management, LLC
CIK 0001325447
$5M1.3M0.01%Q1 202611
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$4M995K0.00%Q1 202612
Trium Capital LLP
CIK 0001963860
$3M994K2.46%Q1 202613
STATE STREET CORP
CIK 0000093751
$3M898K0.00%Q1 202614
Empire Financial Management Company, LLC
CIK 0001971875
$3M736K0.59%Q1 202615
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$2M689K0.00%Q1 202616
ENVESTNET ASSET MANAGEMENT INC
CIK 0001407543
$2M683K0.00%Q1 202617
Russell Investments Group, Ltd.
CIK 0001692234
$2M642K0.00%Q1 202618
Williams Jones Wealth Management, LLC.
CIK 0001788587
$2M613K0.03%Q1 202619
MORGAN STANLEY
CIK 0000895421
$2M608K0.00%Q1 202620
Vanguard Portfolio Management
CIK 0002100121· Index
$2M577K0.00%Q1 2026
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