Quanterix
QTRX
137 hedge funds and large institutions have $231M invested in Quanterix in 2025 Q2 according to their latest regulatory filings, with 25 funds opening new positions, 47 increasing their positions, 41 reducing their positions, and 36 closing their positions.
15% more repeat investments, than reductions
Existing positions increased: 47 | Existing positions reduced: 41
1% more capital invested
Capital invested by funds: $228M → $231M (+$2.6M)
0% more funds holding in top 10
Funds holding in top 10: 2 → 2 (0)
8% less funds holding
Funds holding: 149 → 137 (-12)
20.92% less ownership
Funds ownership: 90.4% → 69.49% (-21%)
31% less first-time investments, than exits
New positions opened: 25 | Existing positions closed: 36
53% less call options, than puts
Call options by funds: $7K | Put options by funds: $15K
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Balyasny Asset Management
Chicago,
Illinois
|
+$4.03M |
| 2 |
PCM
Portolan Capital Management
Boston,
Massachusetts
|
+$3.74M |
| 3 |
BWLSA
Blue Water Life Science Advisors
Larkspur,
California
|
+$3.26M |
| 4 |
Ameriprise
Minneapolis,
Minnesota
|
+$2.91M |
| 5 |
PHP
Parkman Healthcare Partners
Stamford,
Connecticut
|
+$2.88M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PC
Pier Capital
Stamford,
Connecticut
|
-$5.52M |
| 2 |
UBS Group
Zurich,
Switzerland
|
-$4.07M |
| 3 |
KLP
Kent Lake PR
Anasco,
Puerto Rico
|
-$3.48M |
| 4 |
ACM
Ashford Capital Management
Wilmington,
Delaware
|
-$2.84M |
| 5 |
TCM
Topline Capital Management
Santa Monica,
California
|
-$2.51M |
QTRX Hedge Fund Activity: Q2 2025 in Review
137 of the 7,613 institutional investors tracked by Wall St. Rank reported a position in Quanterix (QTRX) for Q2 2025, worth a combined $231M — up 1.1% from $228M a quarter earlier.
Sellers outnumbered buyers: 36 funds closed out of QTRX and 25 opened new positions — a net loss of 11 holders — while 41 trimmed existing stakes and 47 added.
The largest buyer was Balyasny Asset Management, adding an estimated $4.03M. The largest seller was Pier Capital, exiting entirely with an estimated $5.52M sold.
- 137 institutional investors held Quanterix (QTRX) as of Q2 2025, down from 149 in Q1 2025.
- Funds reported $231M of Quanterix stock for Q2 2025, up 1.1% quarter-over-quarter.
- 25 funds opened new Quanterix positions in Q2 2025 and 36 closed out, a net change of -11 holders.
- The largest Quanterix buyer in Q2 2025 was Balyasny Asset Management, an estimated $4.03M added.
- The largest Quanterix seller in Q2 2025 was Pier Capital, an estimated $5.52M sold.
Based on aggregated 13F filings for Q2 2025.