Latest filingSep 01, 2026Most recent Form 4
QTRX
Quanterix Corp
NasdaqIndustrialsLaboratory Analytical Instruments
Insider activity for last month from 08/04 to 09/04. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$00 sells
Net open-market+$03 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period22transactions
- M · Option exercise · dominant16 · 73%
- F · Tax withholding6 · 27%
Activity by reported role
A joint filing can contribute to multiple roles22transactions
- CTO · dominant18 · 82%
- Director4 · 18%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (3)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeMiller Michael FrancisCommon Stock · Direct
37,409Aug 31, 2026
Miller Michael FrancisRestricted Stock Unit · Direct
0Aug 31, 2026
Donnelly William PRestricted Stock Unit · Direct
0Aug 17, 2026
Donnelly William PCommon Stock · Direct
162,401Aug 17, 2026
Elliott Jeffrey ThomasRestricted Stock Unit · Direct
4,075Aug 19, 2026
Elliott Jeffrey ThomasCommon Stock · Direct
15,345Aug 19, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 04 → Sep 04
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Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
QTRX transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
No transactions match your filtersOnce the backend ingests and parses SEC filings, they will appear here. Try removing a filter or picking a wider date range. | ||||||||||
Quanterix Corp Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at Quanterix Corp?
Miller Michael Francis, Elliott Jeffrey Thomas, DONNELLY WILLIAM P.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
No code-S sale is available for this period.
What is the recent purchase and sale balance?
No code-P purchases or code-S sales were reported in the selected period.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.