SEPTInvestingStart Free

AUTL 424B3: Secondary offering

Autolus Therapeutics

Filed with the SEC on · accession 0001193125-26-398045

AUTL filed a 424B3 (prospectus (offering)) with the SEC on Sep 22, 2026. Autolus Therapeutics filed a prospectus for the resale of up to 3,500,000 ADSs by Perceptive Credit Holdings V, LP upon exercise of a warrant with an exercise price of $1.9314 per ADS, expiring July 30, 2036. The stock moved +4.6% by the first close after the filing.

Summary of the filing

Autolus Therapeutics filed a prospectus for the resale of up to 3,500,000 ADSs by Perceptive Credit Holdings V, LP upon exercise of a warrant with an exercise price of $1.9314 per ADS, expiring July 30, 2036. The company will not receive proceeds from the resale but may receive cash upon warrant exercise.

For details, click here →How to read a 424B3 →

Key details

Maximum ADSs registered for resaleshares 3.5M
Warrant exercise price per ADS$2
IssuerAutolus Therapeutics plc
Selling securityholderPerceptive Credit Holdings V, LP

How AUTL stock reacted

Close before

$1.94

Sep 21, 2026

First close after

+4.64%

$2.03

5 trading days

-4.12%

$1.86

Since filing

-34.02%

$1.28

✦ Ask GOAX AI about this filing — what it means for AUTL, 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 AUTL?

Click here

Frequently asked questions

What did AUTL file with the SEC on Sep 22, 2026?

AUTL filed a 424B3 (Secondary offering). Autolus Therapeutics filed a prospectus for the resale of up to 3,500,000 ADSs by Perceptive Credit Holdings V, LP upon exercise of a warrant with an exercise price of $1.9314 per ADS, expiring July 30, 2036. The company will not receive proceeds from the resale but may receive cash upon warrant exercise.

What does a secondary offering mean for AUTL stock?

New shares dilute existing holders and are often sold at a discount to the market price.

How do I read a 424B3?

The final terms of an offering of shares or bonds. Look at price, number of shares and the discount to the market price. Large offerings dilute existing shareholders.

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 424B3 (prospectus (offering)): The final terms of an offering of shares or bonds.

How did AUTL stock react to this filing?

AUTL closed at $1.94 before the filing and $2.03 on Sep 22, 2026 (+4.64%). Five trading days later: $1.86 (-4.12%).

Other AUTL SEC filings

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

Try SEPT free for 7 days
AUTL overviewAUTL analysisAUTL newsLatest SEC filings