Institutional Ownership
Quanterix Corp
CUSIP 74766Q101COMQTRXQ1 2026
13D / 13G Filings
48
Schedule 13D/13G on record
Beneficial Filers
20
Distinct reporting persons
Largest Stake
14.1%
Max % of class reported
Institutional Holders
123
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
48 filings · latest Feb 17, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Feb 17, 2026 | Ameriprise Financial, Inc. | 13G/A | 10.7% | 5.00M | SEC |
| 2 | Nov 19, 2025 | Telegraph Hill Partners III, L.P. | 13G | 5.4% | 2.50M | SEC |
| 3 | Nov 14, 2025 | Ameriprise Financial, Inc. | 13G/A | 9.1% | 4.24M | SEC |
| 4 | Aug 13, 2025 | Portolan Capital Management, LLC | 13G/A | 9.4% | 3.63M | SEC |
| 5 | Jul 17, 2025 | Blackrock, Inc. | 13G/A | 7.3% | 2.84M | SEC |
| 6 | Jul 15, 2025 | Kent Lake Partners LP | 13D/A | 4.5% | — | SEC |
| 7 | May 15, 2025 | Portolan Capital Management, LLC | 13G/A | 7.6% | 2.96M | SEC |
| 8 | May 15, 2025 | Ameriprise Financial, Inc. | 13G/A | 9.6% | 3.72M | SEC |
| 9 | May 14, 2025 | Alliancebernstein L.P. | 13G/A | 0.1% | 37.0K | SEC |
| 10 | May 7, 2025 | Ameriprise Financial, Inc. | 13G/A | 10.7% | 4.16M | SEC |
38 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Quanterix Corp.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Ameriprise Financial Inc | 3.54M | $12.47M |
| 2 | Blackrock, Inc. | 3.28M | $11.54M |
| 3 | Portolan Capital Management, LLC | 2.95M | $10.37M |
| 4 | Blue Water Life Science Advisors, LP | 2.14M | $7.54M |
| 5 | William Blair Investment Management, LLC | 2.08M | $7.33M |
| 6 | Invenomic Capital Management LP | 1.93M | $6.80M |
| 7 | Levin Capital Strategies, L.P. | 1.46M | $5.15M |
| 8 | First Eagle Investment Management, LLC | 1.30M | $4.58M |
| 9 | Geode Capital Management, LLC | 994.8K | $3.50M |
| 10 | Trium Capital LLP | 994.2K | $3.50M |