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Quanterix
QTRX

134 hedge funds and large institutions have $223M invested in Quanterix in 2025 Q4 according to their latest regulatory filings, with 21 funds opening new positions, 42 increasing their positions, 43 reducing their positions, and 13 closing their positions.

New
Increased
Maintained
Reduced
Closed

1,119% more call options, than puts

Call options by funds: $256K | Put options by funds: $21K

100% more funds holding in top 10

Funds holding in top 10: 1 → 2 (+1)

62% more first-time investments, than exits

New positions opened: 21 | Existing positions closed: 13

15% more capital invested

Capital invested by funds: $194M → $223M (+$29.6M)

4% more funds holding

Funds holding: 129 → 134 (+5)

2% less repeat investments, than reductions

Existing positions increased: 42 | Existing positions reduced: 43

1.6% less ownership

Funds ownership: 76.77% → 75.17% (-1.6%)

Holders
134
Holders Change
+5
Holders Change %
+3.88%
% of All Funds
1.63%
Holding in Top 10
2
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+100%
% of All Funds
0.02%
New
21
Increased
42
Reduced
43
Closed
13
Calls
$256K
Puts
$21K
Net Calls
+$235K
Net Calls Change
+$271K

Top Buyers

1
BWLSA
Blue Water Life Science Advisors
California
+$7.05M
2
Ameriprise
Ameriprise
Minnesota
+$4.67M
3
William Blair Investment Management
William Blair Investment Management
Illinois
+$4.54M
4
First Eagle Investment Management
First Eagle Investment Management
New York
+$3.3M
5
PCM
Portolan Capital Management
Massachusetts
+$1.65M

Top Sellers

1
Millennium Management
Millennium Management
New York
-$5.01M
2
EIP
Easterly Investment Partners
Massachusetts
-$3.95M
3
Aberdeen Group
Aberdeen Group
United Kingdom
-$2.86M
4
Marshall Wace
Marshall Wace
United Kingdom
-$2.82M
5
Dimensional Fund Advisors
Dimensional Fund Advisors
Texas
-$1.97M
Name Holding Trade Value Shares
Change 		Change in
Stake
AQR Capital Management
51
AQR Capital Management
Connecticut
$417K -$574K -92,453 -59%
QCM
52
Quantinno Capital Management
New York
$406K +$225K +36,281 +132%
CGL
53
Clarius Group LLC
Washington
$395K – – –
SSA
54
Schonfeld Strategic Advisors
New York
$393K -$465K -74,853 -55%
MLM
55
Mount Lucas Management
Pennsylvania
$359K -$21.7K -3,500 -6%
SPS
56
Susquehanna Portfolio Strategies
Pennsylvania
$351K -$264K -42,519 -44%
RhumbLine Advisers
57
RhumbLine Advisers
Massachusetts
$351K -$12.1K -1,943 -3%
PCA
58
Peddock Capital Advisors
Massachusetts
$331K – – –
PP
59
PDT Partners
New York
$303K – – –
D.E. Shaw & Co
60
D.E. Shaw & Co
New York
$290K +$283K +45,627 New
AllianceBernstein
61
AllianceBernstein
Tennessee
$283K – – –
T. Rowe Price Associates
62
T. Rowe Price Associates
Maryland
$279K -$93.2K -15,000 -26%
BCM
63
Bridgeway Capital Management
Texas
$273K – – –
Bank of America
64
Bank of America
North Carolina
$271K -$285K -45,819 -52%
Deutsche Bank
65
Deutsche Bank
Germany
$190K +$11.3K +1,817 +6%
N
66
Numerai
California
$189K -$362K -58,302 -66%
Los Angeles Capital Management
67
Los Angeles Capital Management
California
$175K +$217K +34,978 New
PAPAIJV
68
Paragon Associates & Paragon Associates II Joint Venture
Texas
$159K -$470K -75,671 -75%
LPL Financial
69
LPL Financial
California
$158K +$155K +24,877 New
ECM
70
ExodusPoint Capital Management
New York
$153K +$150K +24,080 New
Osaic Holdings
71
Osaic Holdings
Arizona
$148K -$9.41K -1,515 -6%
QC
72
Quadrature Capital
United Kingdom
$138K +$135K +21,707 New
VF
73
Virtu Financial
New York
$131K +$128K +20,626 New
Mirae Asset Global ETFs Holdings
74
Mirae Asset Global ETFs Holdings
Hong Kong
$130K +$8.49K +1,367 +7%
IIM
75
INTECH Investment Management
Florida
$121K -$596 -96 -0.5%
1 2
3
4 5

QTRX Hedge Fund Activity: Q4 2025 in Review

134 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in Quanterix (QTRX) for Q4 2025, worth a combined $223M — up 15% from $194M a quarter earlier.

Buyers outnumbered sellers: 21 funds opened new QTRX positions and 13 closed out — a net gain of 8 holders — while 42 added to existing stakes and 43 trimmed.

The largest buyer was Blue Water Life Science Advisors, adding an estimated $7.05M. The largest seller was Millennium Management, cutting an estimated $5.01M.

  • 134 institutional investors held Quanterix (QTRX) as of Q4 2025, up from 129 in Q3 2025.
  • Funds reported $223M of Quanterix stock for Q4 2025, up 15% quarter-over-quarter.
  • 21 funds opened new Quanterix positions in Q4 2025 and 13 closed out, a net change of +8 holders.
  • The largest Quanterix buyer in Q4 2025 was Blue Water Life Science Advisors, an estimated $7.05M added.
  • The largest Quanterix seller in Q4 2025 was Millennium Management, an estimated $5.01M sold.

Based on aggregated 13F filings for Q4 2025.