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AUTL SCHEDULE 13D/A: SEC filing

Blackstone Inc. and affiliated reporting persons

Filed with the SEC on · accession 0001193125-26-455574

AUTL filed a SCHEDULE 13D/A (schedule 13d/a) with the SEC on Nov 10, 2026. Blackstone Inc. and affiliated reporting persons filed Amendment No. 3 to their Schedule 13D regarding Autolus Therapeutics plc, updating their beneficial ownership to 20,485,611 ADSs (7.6% of the class) following the expiration of warrants. The stock moved +0.0% by the first close after the filing.

Summary of the filing

Blackstone Inc. and affiliated reporting persons filed Amendment No. 3 to their Schedule 13D regarding Autolus Therapeutics plc, updating their beneficial ownership to 20,485,611 ADSs (7.6% of the class) following the expiration of warrants. The filing reflects no purchase or disposition of shares.

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Key details

ADSs beneficially owned$20.5M
Reporting person / beneficial ownerBlackstone Inc.
Direct holder of autolus adssBXLS V - Autobahn L.P.
Issuer / subject companyAutolus Therapeutics plc
Founder and reporting person (blackstone)Stephen A. Schwarzman

How AUTL stock reacted

Close before

$1.32

Nov 9, 2026

First close after

+0.00%

$1.32

5 trading days

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Since filing

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Frequently asked questions

What did AUTL file with the SEC on Nov 10, 2026?

AUTL filed a SCHEDULE 13D/A (SEC filing). Blackstone Inc. and affiliated reporting persons filed Amendment No. 3 to their Schedule 13D regarding Autolus Therapeutics plc, updating their beneficial ownership to 20,485,611 ADSs (7.6% of the class) following the expiration of warrants. The filing reflects no purchase or disposition of shares.

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 AUTL stock react to this filing?

AUTL closed at $1.32 before the filing and $1.32 on Nov 10, 2026 (+0.00%).

Other AUTL SEC filings

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