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

View all →
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

View all →
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

View all →
InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
Jan 15, 2026Toloue Masoud
CEO
OtherCommon Stock$14.4K-2K
-0.36%
507,310
1.07% of shares
low
Jan 15, 2026Sriram Vandana
Executive
OtherCommon Stock$2.2K-274
-0.32%
86,013
0.18% of shares
low
Mar 15, 2026Sriram Vandana
Executive
OtherCommon Stock$1.8K-371
-1.33%
27,428
0.06% of shares
low
Dec 31, 2025Toloue Masoud
CEO
OtherCommon Stock$1.6K-258
-0.05%
508,446
1.08% of shares
low
Mar 15, 2026Miller Michael Francis
Executive
OtherCommon Stock$1.4K-293
-0.93%
31,271
0.07% of shares
low
Feb 15, 2026Sriram Vandana
Executive
OtherCommon Stock$1.0K-179
-0.68%
26,069
0.06% of shares
low
Mar 15, 2026Sriram Vandana
Executive
OtherCommon Stock$854-181
-0.67%
26,743
0.06% of shares
low
Mar 15, 2026Miller Michael Francis
Executive
OtherCommon Stock$618-131
-0.42%
30,730
0.06% 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—