Companies / Quanterix Corp

Quanterix Corp

Nasdaq: QTRXCIK 1503274BILLERICA, MAquanterix.com ↗

Financials · FY2025

Revenue$138.90M
Net income$-107.15M
Total debt$1.94M
Cash$44.17M
Diluted EPS$-2.51
Shares outstanding47.3M

Ownership

47.3M shares outstanding · as of Aug 3, 2026
1.9%Insiders
Ownership
Insiders1.90%899,726
Institutions78.81%37,271,768
Public float19.29%9,121,571

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 15

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Insider% of sharesShares
Walt David RFormerDirector
3.96%1,872,890
Toloue MasoudCEOPresident & CEO · Director
1.07%507,310
Meister Paul MFormerDirector
0.66%313,253
Donnelly William PExecutive Chair · Director
0.33%154,127
Hampton Malcolm GarretFormerDirector
0.15%70,099
Sachs Alan BruceFormerDirector
0.15%70,099
Flynn KarenDirector
0.12%57,212
Mendel ScottDirector
0.12%56,053
Lai Goldman MylaDirector
0.12%54,804
Magovcevic-Liebisch IvanaFormerDirector
0.09%43,607

Institutional holders 137

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HolderValue% of shares
Ameriprise Financial Inc$31.78M10.56%
Vanguard Group Inc$17.03M5.66%
BlackRock, Inc.$15.70M7.69%
Blue Water Life Science Advisors, LP$13.31M4.42%
William Blair Investment Management, LLC$13.02M4.33%
Portolan Capital Management, LLC$10.37M6.23%
Invenomic Capital Management LP$9.57M3.18%
Morgan Stanley$5.23M1.74%
Trium Capital LLP$5.20M1.73%
Levin Capital Strategies, L.P.$5.15M3.10%

Activity

Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).
DateActorActionSecurityValueShares ΔPosition afterImpact
Q1 2026
as of
Portolan Capital Management, LLC
13F manager
TrimCommon stock$-5.56M-1.6M
-34.91%
2,945,823
6.23% of shares
medium
Q1 2026
as of
Levin Capital Strategies, L.P.
13F manager
NewCommon stock$5.15M+1.5M
1,464,052
3.10% of shares
medium
Q1 2026
as of
First Eagle Investment Management, LLC
13F manager
AddCommon stock$2.71M+769K
+144.64%
1,300,087
2.75% of shares
low
Q1 2026
as of
Pier Capital, LLC
13F manager
NewCommon stock$1.73M+492K
492,368
1.04% of shares
low
Q1 2026
as of
Marshall Wace, LLP
13F manager
AddCommon stock$1.64M+467K
+301.10%
622,380
1.32% of shares
low
Q4 2023
as of
Barclays PLC
13F manager
AddCommon stock$1.24M+45K
+284.54%
61,184
0.13% of shares
low
Q2 2026
as of
BlackRock, Inc.
13F manager
AddCommon stock$1.12M+260K
+7.69%
3,635,411
7.69% of shares
low
Q1 2026
as of
Millennium Management LLC
13F manager
AddCommon stock$1.01M+287K
+71.17%
689,167
1.46% of shares
low

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
Vanguard Group IncPassive13G/A—0—
Ameriprise Financial IncPassive13G/A———
Portolan Capital Management, LLCPassive13G/A———

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
QTRX——74766Q101—