David C. Duffy is CTO & VP at Quanterix Corp (QTRX). They have made 21 open-market trades across 1 company since 2019, most recently 2022-03-23.
CIK 0001724566
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 21 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| QTRX | 54,730 | $157K |
Shares reported on the most recent Form 4, priced at the 2022-03-28 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| QTRX | SELL | 2022-03-23 | 2022-03-28 | $30.00 | $98K | +5.9% | -20.4% | -35.1% |
| QTRX | SELL | 2022-02-04 | 2022-02-04 | $30.91 | $202K | -0.5% | -14.6% | -30.0% |
| QTRX | SELL | 2022-01-31 | 2022-01-31 | $30.00 | $98K | +10.5% | +6.9% | -23.7% |
| QTRX | SELL | 2021-12-29 | 2021-12-30 | $40.71 | $136K | -17.3% | -28.2% | -32.6% |
| QTRX | SELL | 2021-11-19 | 2021-11-22 | $45.54 | $152K | -13.1% | +1.8% | -33.5% |
| QTRX | SELL | 2021-10-15 | 2021-10-19 | $51.47 | $172K | -0.8% | -9.1% | -40.8% |
| QTRX | SELL | 2021-09-22 | 2021-10-04 | $47.72 | $159K | +5.8% | +16.0% | -11.7% |
| QTRX | SELL | 2021-08-20 | 2021-08-20 | $46.13 | $154K | +3.0% | -2.5% | -4.7% |
| QTRX | SELL | 2021-07-14 | 2021-07-14 | $57.77 | $193K | -1.5% | -6.9% | -11.7% |
| QTRX | SELL | 2021-06-23 | 2021-06-23 | $62.11 | $207K | -10.3% | -16.8% | -25.6% |
| QTRX | SELL | 2021-05-28 | 2021-06-02 | $51.00 | $85K | +32.4% | +17.8% | +3.3% |
| QTRX | SELL | 2021-04-15 | 2021-04-15 | $62.14 | $207K | +4.4% | -29.0% | -15.8% |
| QTRX | SELL | 2021-03-19 | 2021-03-19 | $58.36 | $195K | -2.5% | -1.4% | +9.0% |
| QTRX | SELL | 2021-02-11 | 2021-02-12 | $79.62 | $265K | -17.3% | -31.4% | -51.5% |
| QTRX | SELL | 2020-12-18 | 2020-12-21 | $43.82 | $146K | -2.8% | +68.5% | +33.0% |
| QTRX | SELL | 2020-11-12 | 2020-11-16 | $49.39 | $165K | -8.6% | -8.0% | +83.1% |
| QTRX | SELL | 2020-10-16 | 2020-10-20 | $43.04 | $143K | -10.5% | +12.4% | +93.5% |
| QTRX | SELL | 2020-09-17 | 2020-09-17 | $32.43 | $108K | +0.8% | +27.0% | +30.5% |
| QTRX | SELL | 2020-08-19 | 2020-08-20 | $34.92 | $117K | -4.9% | -11.0% | +24.0% |
| QTRX | SELL · 10b5-1 | 2020-07-13 | 2020-07-14 | $27.39 | $46K | -2.9% | +34.1% | +60.8% |
| QTRX | SELL · 10b5-1 | 2020-06-16 | 2020-06-18 | $26.35 | $44K | +1.4% | +14.6% | +22.9% |
| QTRX | SELL · 10b5-1 | 2020-05-08 | 2020-05-12 | $26.52 | $44K | -9.6% | -7.3% | +24.8% |
| QTRX | SELL · 10b5-1 | 2020-04-15 | 2020-04-17 | $20.87 | $35K | +8.0% | +10.0% | +21.9% |
| QTRX | SELL · 10b5-1 | 2020-03-19 | 2020-03-20 | $11.46 | $19K | +32.6% | +66.3% | +84.5% |
| QTRX | SELL · 10b5-1 | 2020-02-11 | 2020-02-11 | $27.88 | $46K | -3.5% | -40.8% | +0.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.