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
Filing timeAug 19
Trade dateAug 17, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$2.96
Pre-filing
1mo ago +30.4%1w ago -18.2%1d ago -12.5%
Returns since
7d -9.5%30d -15.5%90d -15.5%180d -15.5%1y -15.5%

QTRX price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
QTRX since 2026-08-19Filed 16 days ago · 30 days of pre-filing context shaded
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

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
2.80k sh
Price unknown
Estimated value
—
Computed from shares × price
Holdings after
162k sh
Direct

Filing warnings

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

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Direct Ownership
+2score
Filing-only score

+2

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.

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 filings

Same reporting owner
Recent company activity

0 recent txs

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