William P. Donnelly, Director at Quanterix Corp (QTRX), bought 99,400 shares at $2.75 ($286K) on 2026-08-12, disclosed to the SEC on 2026-08-14.
Open-market purchase of $286k 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 | $2.75 | 27,155 | $75K | 26.1% |
| 2 | $2.93 | 72,245 | $212K | 73.9% |
| Total | $2.88 avg | 99,400 | $286K | 100% |
| Filing → |
| MTD | SELL | 2018-11-29 | $3.1M | — | Filing → |
| MTD | SELL | 2018-11-27 | $2.4M | — | Filing → |
| MTD | SELL | 2018-11-20 | $1.5M | — | Filing → |