DONNELLY WILLIAM P purchased 99.40K shares of QUANTERIX CORP on the open market
Open‑market purchase worth $286.4K. The strongest form of insider conviction signal.
P · 2 purchases
Filed: 8/14/2026ACC: 0001207928-26-000008
+99.40K
Net shares
Net buyer
$286.4K
Total acquired
2
Open market trades
2B · 0S
2
Total transactions
99.40K acquired
Non-Derivative Transactions2
Common Stock
Indirect
Shares
+27.16K
Price / share
$2.75
Trade value
$74.68K
% of position
New position
8/12/2026
0.00→27.16K
Common Stock
Indirect
Shares
+72.25K
Price / share
$2.93
Trade value
$211.68K
% of position
266.0%
8/13/2026
27.16K→99.40K
Total
Net shares
+99.40K
Net value
$286.35K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Indirect | 8/12/2026 | P · Purchase | +27.16K | $2.75 | $74.68K | New position | 0.00 | 27.16K |
| Common Stock Indirect | 8/13/2026 | P · Purchase | +72.25K | $2.93 | $211.68K | 266.0% | 27.16K | 99.40K |
| Total | +99.40K | $286.35K | ||||||
Derivative Transactions0
No derivative transactions reported