Quanterix Corp - QTRX
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| Aug 14, 2026 | SCHEDULE 13G/A | Portolan Capital Management, LLC | 4.02% | 1,899,308 | View |
| Aug 14, 2026 | SCHEDULE 13G/A | George McCabe | 4.02% | 1,899,308 | View |
| Aug 06, 2026 | SCHEDULE 13G | First Eagle Investment Management, LLC | 5.8% | 2,753,165 | View |
| Aug 06, 2026 | SCHEDULE 13G | FIRST EAGLE SMALL CAP OPPORTUNITY FUND | 5.1% | 2,421,533 | View |
| May 15, 2026 | SCHEDULE 13G/A | Portolan Capital Management, LLC | 6.25% | 2,945,823 | View |
| May 15, 2026 | SCHEDULE 13G/A | George McCabe | 6.25% | 2,945,823 | View |
| May 15, 2026 | SCHEDULE 13G/A | Ameriprise Financial, Inc. | 7.5% | 3,542,374 | View |
| May 07, 2026 | SCHEDULE 13G/A | Ameriprise Financial, Inc. | 2.1% | 990,224 | View |
| Mar 27, 2026 | SCHEDULE 13G/A | The Vanguard Group | 0.0% | 0 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.