Quanterix (QTRX) stock: insider trades, news & valuation
Net buyingShare price and insider trades
Quanterix insider trading at a glance (Oct 9, 2026): in the past 12 months, 1 insider bought $286K and 0 sold $0 of QTRX stock on the open market.
Get emailed when insiders cluster-buy stocks like QTRX
Free alerts the day a new cluster buy is filed, plus the Monday report of the week's biggest insider trades.
Free · unsubscribe anytime · not investment advice · see a sample issue
QTRX insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | $286K | 2 | — | 0 |
| Q2 2026 | $10K | 1 | — | 0 |
Valuation, profit and volume
Summary
Over the past 12 months, 1 Quanterix Corp insider reported open-market purchases totaling $286K, while 0 insiders reported sales totaling $0.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Aug 14SEC | William P DonnellyDirector | Buy | 72,24599,400 held (+266%) | $2.93 | $212K | +11.9% | — |
| Aug 14SEC | William P DonnellyDirector | Buy | 27,155new position | $2.75 | $75K | +19.3% | — |
| Jun 12SEC | Benjamin MeadowsChief Commercial Officer | Buy | 3,500new position | $2.77 | $10K | +18.4% | — |
Insiders at Quanterix Corp
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| William P DonnellyDirector | $286K | — | Aug 14, 2026 | — |
| Benjamin MeadowsChief Commercial Officer | $10K | — | Jun 12, 2026 | — |
QTRX stock: common questions
Are Quanterix Corp insiders buying QTRX stock?
In the past 12 months, 1 insiders reported open-market purchases of QTRX worth $286K. The latest was Director William P Donnelly bought $212K of QTRX at $2.93 — largest purchase by this insider in our records; raises the stake by 266%.
Are Quanterix Corp insiders selling QTRX stock?
0 insiders reported sales worth $0 over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is QTRX's 52-week range?
Over the past year QTRX has traded between $2.42 and $8.06. It last closed at $3.28 on Oct 9, 2026.