Transaction · 0001207928-26-000009

Donnelly William P

DONNELLY WILLIAM P, DIR, reported a transaction classified as exercise at Quanterix Corp involving 2802.000000 shares. Reported holdings after the transaction were 162401.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

exerciseSEC transaction code MDIR
QTRXQuanterix Corp
Trade date
Aug 17, 2026
Filing date
Aug 19, 2026
View on SEC Insider profile
Estimated value—Shares × reported price
Shares traded2.80kPrice unknown
Holdings after162kDirect
% of reported position tradedUnavailableThis security and ownership context
How reported position traded is calculated

Calculated only for code-P purchases and code-S sales.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

Filing warnings

Notes recorded with this filing
1 warning
missing priceThe filing did not provide a usable price per share.

QTRX price since this filing

Daily closing prices, with the filing date and available return windows
QTRX · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago +30.4%1w ago -18.2%1d ago -12.5%
Returns since7d -9.5%30d +3.7%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
exercise
Code M
Identifier
0001207928-26-000009
Common Stock
Transaction date
Aug 17, 2026
Filed Aug 19, 2026, 10:37 AM · 2d delay
Shares
2,802 sh
Price unknown
Estimated value
—
Computed from shares × price
Holdings after
162,401 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Direct Ownership
Filing-only score

+2 points

Compact filing score computed from stored Form 4 facts. Version v1.

Neutral filing signal

This filing is broadly neutral on the filing-only scale. The Form 4 facts do not strongly tilt positive or negative.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • timely_filing+4 points

    reporting_delay_days = 2

    Filing reported within two business days of the transaction.
  • missing_price-8 points

    price_cents is null

    Missing price reduces confidence in value-based signals.
Missing facts
  • price_cents
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    Restricted stock units convert into common stock on a one-for-one basis.

  2. F2

    On August 17, 2023, the reporting person was granted 8,238 restricted stock units, vesting 33%, 33%, and 34% on the first, second, and third anniversaries of the grant date, respectively.

Original filing · 0001207928-26-000009
Related transactions

0 other transactions

Same SEC filing
Recent company activity

0 recent txs

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