13F Pro

SEC Form 4 reporting owner

Kooij Louise Frederika

Kooij Louise Frederika has filed 28 Form 4 transactions reported between December 23, 2025 and July 20, 2026, as Chief Accounting Officer of NewAmsterdam Pharma Co N.V..

Name as filed: Kooij Louise Frederika

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$10.8M
12 lines
Companies
1
with Form 4 filings
Latest transaction
Jul 20, 2026
transaction date

Roles and reported holdings

  • NAMSNewAmsterdam Pharma Co N.V.
    Dec 23, 2025 – Jul 20, 2026

    Chief Accounting Officer

    Held directly24,353 sh as of Jul 20, 2026 · Form 4

    24 months: $10.8M sold

Transaction history

All 28 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Jul 20, 2026NAMSChief Accounting OfficerOpen-market saleCode S · direct2,915$92K@ $31.71Form 4
Jul 20, 2026NAMSChief Accounting OfficerOpen-market saleCode S · direct31,885$990K@ $31.05Form 4
Jul 20, 2026NAMSChief Accounting OfficerOpen-market saleCode S · direct70,200$2.1M@ $29.96Form 4
Jul 20, 2026NAMSChief Accounting OfficerOption exerciseCode M · direct80,000$894K@ $11.17Form 4
Jul 20, 2026NAMSChief Accounting OfficerOption exerciseCode M · direct25,000$298K@ $11.90Form 4
Jun 22, 2026NAMSChief Accounting OfficerOpen-market saleCode S · direct300$9K@ $30.73Form 4
Jun 22, 2026NAMSChief Accounting OfficerOpen-market saleCode S · direct39,700$1.2M@ $30.20Form 4
Jun 22, 2026NAMSChief Accounting OfficerOption exerciseCode M · direct15,000$179K@ $11.90Form 4
Jun 22, 2026NAMSChief Accounting OfficerOption exerciseCode M · direct25,000$273K@ $10.90Form 4
May 26, 2026NAMSChief Accounting OfficerOpen-market saleCode S · direct65,000$2.3M@ $35.69Form 4
May 26, 2026NAMSChief Accounting OfficerOption exerciseCode M · direct5,000$55K@ $10.90Form 4
May 26, 2026NAMSChief Accounting OfficerOption exerciseCode M · direct60,000$600K@ $10.00Form 4
Jan 28, 2026NAMSChief Accounting OfficerOption exerciseCode M · direct32,612$355K@ $10.90Form 4
Jan 27, 2026NAMSChief Accounting OfficerOption exerciseCode M · direct39,816$434K@ $10.90Form 4
Jan 26, 2026NAMSChief Accounting OfficerOpen-market saleCode S · direct309$10K@ $33.45Form 4
Jan 26, 2026NAMSChief Accounting OfficerOpen-market saleCode S · direct34,091$1.1M@ $32.77Form 4
Jan 26, 2026NAMSChief Accounting OfficerOption exerciseCode M · direct34,400$375K@ $10.90Form 4
Jan 23, 2026NAMSChief Accounting OfficerOpen-market saleCode S · direct12,767$439K@ $34.37Form 4
Jan 23, 2026NAMSChief Accounting OfficerOpen-market saleCode S · direct25,405$850K@ $33.44Form 4
Jan 23, 2026NAMSChief Accounting OfficerOption exerciseCode M · direct38,172$416K@ $10.90Form 4
Jan 7, 2026NAMSChief Accounting OfficerGrant or awardCode A · direct53,500—Form 4
Jan 7, 2026NAMSChief Accounting OfficerGrant or awardCode A · direct12,000—Form 4
Jan 5, 2026NAMSChief Accounting OfficerOpen-market saleCode S · direct2,647$88K@ $33.25Form 4
Dec 26, 2025NAMSChief Accounting OfficerOpen-market saleCode S · direct43,872$1.5M@ $35.30Form 4
Dec 26, 2025NAMSChief Accounting OfficerOption exerciseCode M · direct5,000$55K@ $10.90Form 4
Dec 26, 2025NAMSChief Accounting OfficerOption exerciseCode M · direct38,872$389K@ $10.00Form 4
Dec 24, 2025NAMSChief Accounting OfficerOption exerciseCode M · direct26,011$260K@ $10.00Form 4
Dec 23, 2025NAMSChief Accounting OfficerOption exerciseCode M · direct75,117$751K@ $10.00Form 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.