13F Pro

SEC Form 4 reporting owner

Donnelly William P

Donnelly William P has filed 14 Form 4 transactions reported between December 30, 2025 and August 17, 2026, as Executive Chair of Quanterix Corp, a reporting owner of PRICE T ROWE GROUP INC and a reporting owner of Ingersoll Rand Inc..

Name as filed: DONNELLY WILLIAM P

Open-market buys, 24 mo
$286K
2 lines
Open-market sales, 24 mo
None
reported
Companies
3
with Form 4 filings
Latest transaction
Aug 17, 2026
transaction date

Roles and reported holdings

  • QTRXQuanterix Corp
    Jan 2, 2026 – Aug 17, 2026

    Executive Chair

    Held indirectly (latest line)99,400 sh as of Aug 13, 2026 · Form 4

    24 months: $286K bought

  • TROWPRICE T ROWE GROUP INC
    Dec 30, 2025 – Jun 30, 2026

    Reporting owner

    No common-stock holding reported on a purchase, sale, gift or withholding line.

  • IRIngersoll Rand Inc.
    Feb 23, 2026 – Feb 26, 2026

    Reporting owner

    No common-stock holding reported on a purchase, sale, gift or withholding line.

Transaction history

All 14 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Aug 17, 2026QTRXOption exerciseCode M · direct2,802—Form 4
Aug 13, 2026QTRXOpen-market purchaseCode P · indirect72,245$212K@ $2.93Form 4
Aug 12, 2026QTRXOpen-market purchaseCode P · indirect27,155$75K@ $2.75Form 4
Jul 1, 2026QTRXGrant or awardCode A · direct5,472$24K@ $4.34Form 4
Jun 30, 2026TROWGrant or awardCode A · direct576—Form 4
Jun 29, 2026TROWGrant or awardCode A · direct142$16K@ $114.38Form 4
May 8, 2026TROWGrant or awardCode A · direct1,899—Form 4
Apr 1, 2026QTRXExecutive ChairGrant or awardCode A · direct6,178—Form 4
Mar 30, 2026TROWGrant or awardCode A · direct152$14K@ $89.03Form 4
Feb 26, 2026IROption exerciseCode M · direct3,029—Form 4
Feb 23, 2026IRGrant or awardCode A · direct2,927—Form 4
Jan 2, 2026QTRXExecutive ChairGrant or awardCode A · direct2,377—Form 4
Dec 31, 2025TROWGrant or awardCode A · direct621—Form 4
Dec 30, 2025TROWGrant or awardCode A · direct119$12K@ $103.64Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.