Real time Form 13D and 13G transaction reports:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
- Shares have beem adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-08-06 10:38 am Purchase | 2026-06-30 | 13G | QUANTERIX CORP COM QTRX | First Eagle Investment Management, LLC | 2,753,165 5.800% | 2,753,165 (New Position) | Filing History |
| 2026-05-15 4:06 pm Sale | 2026-03-31 | 13G | QUANTERIX CORP COM QTRX | Portolan Capital Management, LLC | 2,945,823 6.250% | -687,799 (-18.93%) | Filing History |
| 2026-05-15 10:36 am Purchase | 2026-03-31 | 13G | QUANTERIX CORP COM QTRX | AMERIPRISE FINANCIAL INC AMP | 3,542,374 7.500% | 2,552,150 (+257.73%) | Filing History |
| 2026-05-07 10:19 am Sale | 2026-04-30 | 13G | QUANTERIX CORP COM QTRX | AMERIPRISE FINANCIAL INC AMP | 990,224 2.100% | -4,005,849 (-80.18%) | Filing History |
| 2026-03-27 11:35 am Sale | 2026-03-13 | 13G | QUANTERIX CORP COM QTRX | VANGUARD GROUP INC | 0 0.000% | -2,525,679 (Position Closed) | Filing History |
| 2026-02-17 09:53 am Purchase | 2025-12-31 | 13G | QUANTERIX CORP COM QTRX | AMERIPRISE FINANCIAL INC AMP | 4,996,073 10.700% | 752,561 (+17.73%) | Filing History |
| 2025-11-19 4:00 pm Purchase | 2025-09-30 | 13G | QUANTERIX CORP COM QTRX | Telegraph Hill Partners III, L.P. | 2,504,648 5.400% | 2,504,648 (New Position) | Filing History |
| 2025-11-14 10:07 am Purchase | 2025-09-30 | 13G | QUANTERIX CORP COM QTRX | AMERIPRISE FINANCIAL INC AMP | 4,243,512 9.100% | 528,274 (+14.22%) | Filing History |
| 2025-08-13 4:10 pm Purchase | 2025-06-30 | 13G | QUANTERIX CORP COM QTRX | Portolan Capital Management, LLC | 3,633,622 9.360% | 670,225 (+22.62%) | Filing History |
| 2025-07-17 7:54 pm Sale | 2025-06-30 | 13G | QUANTERIX CORP COM QTRX | BlackRock Inc. BLK | 2,843,760 7.300% | -346,865 (-10.87%) | Filing History |
| 2025-07-15 5:15 pm Sale | 2025-07-11 | 13D | QUANTERIX CORP COM QTRX | Kent Lake PR LLC | 2,089,500 4.500% | -555,586 (-21.00%) | Filing History |
| 2025-05-15 11:30 am Sale | 2025-03-31 | 13G | QUANTERIX CORP COM QTRX | AMERIPRISE FINANCIAL INC AMP | 3,715,238 9.600% | -444,736 (-10.69%) | Filing History |
| 2025-05-15 11:29 am Purchase | 2025-03-31 | 13G | QUANTERIX CORP COM QTRX | Portolan Capital Management, LLC | 2,963,397 7.640% | 442,711 (+17.56%) | Filing History |
| 2025-05-14 5:10 pm Sale | 2025-03-31 | 13G | QUANTERIX CORP COM QTRX | AllianceBernstein L.P. | 36,980 0.100% | -2,402,825 (-98.48%) | Filing History |
| 2025-05-07 10:44 am Purchase | 2025-04-30 | 13G | QUANTERIX CORP COM QTRX | AMERIPRISE FINANCIAL INC AMP | 4,159,974 10.700% | 954,046 (+29.76%) | Filing History |
| 2025-04-30 5:12 pm Sale | 2025-01-09 | 13D | QUANTERIX CORP COM QTRX | Akoya Biosciences Inc. AKYA | 0 0.000% | -2,955,532 (Position Closed) | Filing History |
| 2025-04-30 4:40 pm Purchase | 2025-04-28 | 13D | AKOYA BIOSCIENCES INC AKYA | Quanterix Corp QTRX | 30,560,609 55.600% | 2,846,598 (+10.27%) | Filing History |
| 2025-04-30 11:13 am Purchase | 2025-03-31 | 13G | QUANTERIX CORP COM QTRX | VANGUARD GROUP INC | 2,525,679 6.510% | 470,646 (+22.90%) | Filing History |
| 2025-04-23 4:05 pm Sale | 2025-03-31 | 13G | QUANTERIX CORP COM QTRX | Millennium Management LLC | 55,713 0.100% | -2,153,853 (-97.48%) | Filing History |
| 2025-03-03 5:00 pm Purchase | 2025-02-28 | 13D | QUANTERIX CORP COM QTRX | Kent Lake PR LLC | 2,645,086 6.900% | 367,132 (+16.12%) | Filing History |