Quanterix
QTRX
128 hedge funds and large institutions have $128M invested in Quanterix in 2026 Q1 according to their latest regulatory filings, with 19 funds opening new positions, 51 increasing their positions, 36 reducing their positions, and 23 closing their positions.
2,300% more call options, than puts
Call options by funds: $168K | Put options by funds: $7K
42% more repeat investments, than reductions
Existing positions increased: 51 | Existing positions reduced: 36
2.47% more ownership
Funds ownership: 75.17% → 77.64% (+2.5%)
0% more funds holding in top 10
Funds holding in top 10: 2 → 2 (0)
4% less funds holding
Funds holding: 134 → 128 (-6)
17% less first-time investments, than exits
New positions opened: 19 | Existing positions closed: 23
42% less capital invested
Capital invested by funds: $223M → $128M (-$94.9M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
LCS
Levin Capital Strategies
New York
|
+$8.55M |
| 2 |
First Eagle Investment Management
New York
|
+$4.49M |
| 3 |
TCM
Topline Capital Management
Santa Monica,
California
|
+$3.29M |
| 4 |
PC
Pier Capital
Stamford,
Connecticut
|
+$2.87M |
| 5 |
Marshall Wace
London,
United Kingdom
|
+$2.73M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PCM
Portolan Capital Management
Boston,
Massachusetts
|
-$9.22M |
| 2 |
Ameriprise
Minneapolis,
Minnesota
|
-$8.49M |
| 3 |
EIP
Easterly Investment Partners
Beverly,
Massachusetts
|
-$3.92M |
| 4 |
Two Sigma Investments
New York
|
-$1.31M |
| 5 |
Morgan Stanley
New York
|
-$1.26M |
QTRX Hedge Fund Activity: Q1 2026 in Review
128 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in Quanterix (QTRX) for Q1 2026, worth a combined $128M — down 42% from $223M a quarter earlier.
Sellers outnumbered buyers: 23 funds closed out of QTRX and 19 opened new positions — a net loss of 4 holders — while 36 trimmed existing stakes and 51 added.
The largest buyer was Levin Capital Strategies, opening a new position worth an estimated $8.55M. The largest seller was Portolan Capital Management, cutting an estimated $9.22M.
- 128 institutional investors held Quanterix (QTRX) as of Q1 2026, down from 134 in Q4 2025.
- Funds reported $128M of Quanterix stock for Q1 2026, down 42% quarter-over-quarter.
- 19 funds opened new Quanterix positions in Q1 2026 and 23 closed out, a net change of -4 holders.
- The largest Quanterix buyer in Q1 2026 was Levin Capital Strategies, an estimated $8.55M added.
- The largest Quanterix seller in Q1 2026 was Portolan Capital Management, an estimated $9.22M sold.
Based on aggregated 13F filings for Q1 2026.