Summary
Updated Aug 30, 2026
David R. Walt files SEC Form 4 reports at Quanterix Corp (QTRX). 5 SEC Form 4 filings on record, most recently on 1 October 2025. Most recent open-market trade: bought $761K of QTRX on 13 June 2025. Lifetime open-market purchases: $2.12M. Historical track record: 3/5 stars across 4 tracked purchases.
Recent Transactions
7Every recent SEC Form 4 transaction David R. Walt has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies David R. Walt files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- William P. Donnelly - $286K of QTRX open-market activity in the last 12 months
- Vandana Sriram - $20K of QTRX open-market activity in the last 12 months
- Benjamin Meadows - $10K of QTRX open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is David R. Walt?
David R. Walt is a corporate insider of Quanterix Corp (QTRX). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did David R. Walt last file a Form 4?
The most recent primary Form 4 on record is dated 1 October 2025, one of 5 filings going back to 2025.
Has David R. Walt been buying or selling stock?
Recorded transactions: 4 open-market purchases ($2.12M) and 0 open-market sales across all tracked filings.
How accurate is David R. Walt's historical track record?
Across 4 tracked purchases, David R. Walt averaged +7.9% avg 30-day return with a 50% 30-day win rate. InsiderAlpha rates the track record at 3/5 stars.
Where can I see all of David R. Walt's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Follow David R. Walt and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial
