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NAUT SCHEDULE 13D/A: Insider sale planned

Perceptive Life Sciences Master Fund, Ltd.

Filed with the SEC on · accession 0001193125-26-445289

NAUT filed a SCHEDULE 13D/A (schedule 13d/a) with the SEC on Nov 3, 2026. A report the company filed with the SEC (the US market regulator). The stock moved +0.6% by the first close after the filing.

Summary of the filing

Perceptive Life Sciences Master Fund, Ltd. reported a series of open-market sales of Nautilus Biotechnology (NAUT) common stock between September 29 and October 26, 2026, totaling approximately 5.54 million shares at weighted average prices ranging from $1.50 to $3.12 per share.

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Key details

Total shares sold across reported transactionsshares 5.5M
Approximate gross proceeds from reported sales$11.2M
Reporting person / selling shareholderPerceptive Life Sciences Master Fund, Ltd.
IssuerNautilus Biotechnology, Inc.

How NAUT stock reacted

Close before

$2.33

Nov 2, 2026

First close after

+0.64%

$2.35

5 trading days

—

Since filing

-1.93%

$2.29

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Frequently asked questions

What did NAUT file with the SEC on Nov 3, 2026?

NAUT filed a SCHEDULE 13D/A (Insider sale planned). Perceptive Life Sciences Master Fund, Ltd. reported a series of open-market sales of Nautilus Biotechnology (NAUT) common stock between September 29 and October 26, 2026, totaling approximately 5.54 million shares at weighted average prices ranging from $1.50 to $3.12 per share.

How do I read a SCHEDULE 13D/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 13D/A (schedule 13d/a): A report the company filed with the SEC (the US market regulator).

How did NAUT stock react to this filing?

NAUT closed at $2.33 before the filing and $2.35 on Nov 3, 2026 (+0.64%).

Other NAUT SEC filings

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