InsiderCIK 1207928

William P. Donnelly: Insider Trades

Every open-market purchase and sale William P. Donnelly reported on Form 4 since Aug 13, 2026, with how the stock moved after each purchase.

QTRX Quanterix Corp · Director

2Purchases

$286KBought

0Sales

$0Sold

Track record of purchases

After	Purchases measured	Average change	Median	Rose
1 month	2	−5.2%	−2.2%	0 of 2

Change in the stock price from the price paid to the closest weekly price about 1, 3 and 6 months later, from SEC fails-to-deliver data. Dividends are not included, and purchases with a possible stock split in between are skipped. Past results do not predict future ones. How we measure this

All reported trades

Trades by William P. Donnelly
Filed	Traded	Ticker	Role	Type	Shares	Price ($)	Value	Holding	3 mo. after	Filing
Aug 14	Aug 13	QTRX	Director (ind.)	▲ BUY	72,245	2.93	$212K	+266%		Form 4 ↗
Aug 14	Aug 12	QTRX	Director (ind.)	▲ BUY	27,155	2.75	$75K	New		Form 4 ↗

Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings

Names come from the filings. Different people can share a name, so we group trades by the SEC's reporting-owner number (CIK) instead.