David R. Walt, Director at Quanterix Corp (QTRX), bought 420,000 shares at $5.43 ($2.3M) on 2025-06-06, disclosed to the SEC on 2025-06-09.
Open-market purchase of $2.3M QTRX by Director. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history). Context: insider career grade C.
Nothing distinguishes this filing.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $5.43 | 131,869 | $716K | 31.6% |
| 2 | $5.43 | 131,869 | $716K | 31.6% |
| 3 | $5.34 | 78,131 | $417K | 18.4% |
| 4 | $5.34 | 78,131 | $417K | 18.4% |
| Total | $5.40 avg | 420,000 | $2.3M | 100% |
| Filing → |
| QTRX | BUY | 2022-08-10 | $2.6M | — | Filing → |
| QTRX | BUY | 2020-03-17 | $1.8M | — | Filing → |
| XCUR | BUY | 2020-03-16 | $704K | — | Filing → |