🕵️ Quanterix Corp ($QTRX)
SEC insider & ownership activity, last 12 months · CIK 1503274 · every row links its SEC filing
Over the last 12 months insiders bought $30K with no open-market selling against it. Sriram Vandana bought $20K in discretionary trades (Sep). Ameriprise Financial, Inc. added 2.1% → 7.5%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
2 buyers, $30K (2 lots) · 0 sellers, $0 (0 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Sriram Vandana | 1 | $20K | 0 | – | Sep 12, 2025 |
| Meadows Benjamin | 1 | $10K | 0 | – | May 12, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Ameriprise Financial, Inc. | 7.5% | 13G | May 15, 2026 | filing ↗ | |
| Blackrock, Inc. | 7.3% | 13G | Jul 17, 2025 | filing ↗ | |
| TAM UK International Holdings Limited | 6.7% | 13G | Feb 17, 2026 | filing ↗ | |
| Portolan Capital Management, LLC | 6.2% | 13G | May 15, 2026 | filing ↗ | |
| George McCabe | 6.2% | 13G | May 15, 2026 | filing ↗ | |
| Telegraph Hill Partners III, L.P. | 5.4% | 13G | Nov 19, 2025 | filing ↗ | |
| THP III Affiliates Fund, LLC | 5.4% | 13G | Nov 19, 2025 | filing ↗ | |
| Telegraph Hill Partners III Investment Management, LLC | 5.4% | 13G | Nov 19, 2025 | filing ↗ | |
| Telegraph Hill Partners Management Company, LLC | 5.4% | 13G | Nov 19, 2025 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Jun 9, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 9, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 9, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 14, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 11, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 11, 2026 | filing ↗ |
| Earnings (2.02) | May 6, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 6, 2026 | filing ↗ |
| Earnings (2.02) | Mar 2, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 2, 2026 | filing ↗ |
| Earnings (2.02) | Jan 8, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 8, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 8, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 8, 2026 | filing ↗ |
| Officer/director changes (5.02) | Nov 20, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 20, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 20, 2025 | filing ↗ |
| Earnings (2.02) | Nov 10, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 10, 2025 | filing ↗ |
| Shareholder vote (5.07) | Sep 29, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 29, 2025 | filing ↗ |
| Shareholder vote (5.07) | Sep 23, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 23, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 23, 2025 | filing ↗ |
| Earnings (2.02) | Aug 5, 2025 | filing ↗ |
| Charter/bylaw changes (5.03) | Aug 5, 2025 | filing ↗ |