NAMS SCHEDULE 13G/A: SEC filing

An institutional investor

Filed with the SEC on Nov 5, 2026 · accession 0000315066-26-002799

NAMS filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 5, 2026. A report the company filed with the SEC (the US market regulator). The stock moved -9.7% by the first close after the filing.

Summary of the filing

An institutional investor filed an amended Schedule 13G indicating a change in its passive ownership position in NewAmsterdam Pharma Co N.V. The filing does not disclose a change in control intent or activist plans.

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Key details

IssuerNewAmsterdam Pharma Co N.V.

How NAMS stock reacted

Close before

$20.93

Nov 4, 2026

First close after

-9.75%

$18.89

5 trading days

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Since filing

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Frequently asked questions

What did NAMS file with the SEC on Nov 5, 2026?

NAMS filed a SCHEDULE 13G/A (SEC filing). An institutional investor filed an amended Schedule 13G indicating a change in its passive ownership position in NewAmsterdam Pharma Co N.V. The filing does not disclose a change in control intent or activist plans.

How do I read a SCHEDULE 13G/A?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).

How did NAMS stock react to this filing?

NAMS closed at $20.93 before the filing and $18.89 on Nov 5, 2026 (-9.75%).

Other NAMS SEC filings

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