David R Walt bought $1.1M of QTRX
director at Quanterix Corp. 210,000 shares at an average of $5.40, traded Jun 6, 2025, filed Jun 9, 2025.
Score components
- +15RoleDirector
- +25Trade size$1.1M at market
- +3Relative to holdingsHoldings up 14%
- 0Price contextNo price history yet
- +15Cluster3 insiders buying within 14 days
- 0Repeat buyingFirst buy in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
What happened after comparable buys
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001562180-25-004657, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Jun 6, 2025 | POpen-market purchase Common Stock | +131,869 | $5.43 | $717k | 1,628,802 | Jun 9, 2025 |
| Jun 9, 2025 | POpen-market purchase Common Stock | +78,131 | $5.34 | $417k | 1,706,933 | Jun 9, 2025 |
Related signals
Other insiders at Quanterix Corp and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 22Weak | QTRXbuy Quanterix Corp | Vandana Sriram Chief Financial Officer | $20k 4,150 shares | +5% | |
| 63Notable | Quanterix Corp | David R Walt director | $985k 160,000 shares | +9% | |
| 56Moderate | Quanterix Corp | Masoud Toloue President & CEO | $249k 45,900 shares | +10% | |
| 58Moderate | Quanterix Corp | William P Donnelly Executive Chair | $506k 93,113 shares | +203% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.