DONNELLY WILLIAM P
Director
PurchaseAlert
- Shares
- 72,245
- Price
- $2.93
- Value
- $211,678
SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•80 filings
QTRX
Quanterix Corp
Net purchases of $286.4K over the last 3 months
1 buyer account for the net balance. There is no cluster of three distinct buyers within 30 days. We found no CEO/CFO purchases over 12 months.
How to read this signal
Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.
3-month balance
+$286,354
1 buyers · 0 sellers
12-month purchases
$296,049
2 distinct insiders
12-month sales
$0.00
0 distinct insiders
Highlighted alerts
4
0 Rule 10b5-1 trades treated as informational
Buying cluster · 30 days
Fewer than three distinct buyers
CEO/CFO purchases · 12 months
No executive purchases found
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Form 4 raw → Raspberry
The value is in what we do not call a signal.
The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.
100
Raw transactions
Everything returned by the filing
4
Voluntary view
P/S trades after deterministic checks
98
Administrative noise
Stored, never alerted
0
10b5-1
Shown as informational
SEC ownership XML facts
- Code
- F
- Shares
- 249
- Price
- $3.07
- Footnotes
- 6
Restricted stock units convert into common stock on a one-for-one basis. On February 6, 2023, the reporting person was granted 3,929 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. On March 15, 2023, the reporting person was granted 6,566 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. On February 2, 2024, the reporting person was granted 6,494 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. On May 21, 2024, the reporting person was granted 17,878 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter. On February 4, 2025, the reporting person was granted 40,036 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.
Recent transactions
Voluntary purchases and sales; administrative noise stays hidden.
DONNELLY WILLIAM P
Director
PurchaseAlert
- Shares
- 27,155
- Price
- $2.75
- Value
- $74,676
Meadows Benjamin
Chief Commercial Officer
PurchaseAlert
- Shares
- 3,500
- Price
- $2.77
- Value
- $9,695
Sriram Vandana
Chief Financial Officer
PurchaseAlert
- Shares
- 4,150
- Price
- $4.79
- Value
- $19,879
| Date | Insider | Transaction | Shares | Price | Value | Reading |
|---|---|---|---|---|---|---|
| Aug 13, 2026 | DONNELLY WILLIAM P Director | Purchase | 72,245 | $2.93 | $211,678 | |
| Aug 12, 2026 | DONNELLY WILLIAM P Director | Purchase | 27,155 | $2.75 | $74,676 | |
| May 12, 2026 | Meadows Benjamin Chief Commercial Officer | Purchase | 3,500 | $2.77 | $9,695 | |
| Sep 12, 2025 | Sriram Vandana Chief Financial Officer | Purchase | 4,150 | $4.79 | $19,879 |
“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.