NAUT SCHEDULE 13D/A: Activist campaign

An amended Schedule 13D was

Filed with the SEC on Sep 11, 2026 · accession 0001231919-26-001165

NAUT filed a SCHEDULE 13D/A (schedule 13d/a) with the SEC on Sep 11, 2026. An amended Schedule 13D was filed for Nautilus Biotechnology, Inc., indicating a reporting person has updated their ownership position and/or intentions regarding the company. The stock moved +3.1% by the first close after the filing.

Summary of the filing

An amended Schedule 13D was filed for Nautilus Biotechnology, Inc., indicating a reporting person has updated their ownership position and/or intentions regarding the company. The filing text provided contains only the EDGAR directory listing, so specific ownership percentages and stated purposes are not available.

For details, click here →

Key details

Subject companyNautilus Biotechnology, Inc.

How NAUT stock reacted

Close before

$0.99

Sep 10, 2026

First close after

+3.07%

$1.02

5 trading days

-1.81%

$0.97

Since filing

+125.34%

$2.23

✦ Ask GOAX AI about this filing — what it means for NAUT, what changed since its last filings and what to watch next.

Try it free for 7 days

🔔 Want to stay updated on new SEC filings for NAUT?

Click here

Frequently asked questions

What did NAUT file with the SEC on Sep 11, 2026?

NAUT filed a SCHEDULE 13D/A (Activist campaign). An amended Schedule 13D was filed for Nautilus Biotechnology, Inc., indicating a reporting person has updated their ownership position and/or intentions regarding the company. The filing text provided contains only the EDGAR directory listing, so specific ownership percentages and stated purposes are not available.

What does a activist campaign mean for NAUT stock?

A settlement removes uncertainty; the stock often reacts to whether the amount is bigger or smaller than investors expected.

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 $0.99 before the filing and $1.02 on Sep 11, 2026 (+3.07%). Five trading days later: $0.97 (-1.81%).

Other NAUT SEC filings

Get alerts when NAUT files with the SEC, plus live charts, key levels and news for 13,000+ stocks.

Try SEPT free for 7 days

NAUT overview NAUT analysis NAUT news Latest SEC filings