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RCUS 424B5: Secondary offering

Arcus Biosciences, Inc.

Filed with the SEC on · accession 0001193125-26-427888

RCUS filed a 424B5 (prospectus (offering)) with the SEC on Oct 21, 2026. Arcus Biosciences, Inc. filed a preliminary prospectus supplement (424B5) for an underwritten public offering of common stock, with an option for underwriters to purchase additional shares within 30 days. The stock moved -19.6% by the first close after the filing.

Summary of the filing

Arcus Biosciences, Inc. filed a preliminary prospectus supplement (424B5) for an underwritten public offering of common stock, with an option for underwriters to purchase additional shares within 30 days. The offering size, price, and proceeds are not yet specified in this preliminary filing.

For details, click here →How to read a 424B5 →

Key details

Last reported sale price per share on October 20, 2026$24
IssuerArcus Biosciences, Inc.
UnderwriterJefferies
UnderwriterLeerink Partners
UnderwriterTD Cowen

How RCUS stock reacted

Close before

$23.75

Oct 20, 2026

First close after

-19.58%

$19.10

5 trading days

-23.62%

$18.14

Since filing

-23.03%

$18.28

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Frequently asked questions

What did RCUS file with the SEC on Oct 21, 2026?

RCUS filed a 424B5 (Secondary offering). Arcus Biosciences, Inc. filed a preliminary prospectus supplement (424B5) for an underwritten public offering of common stock, with an option for underwriters to purchase additional shares within 30 days. The offering size, price, and proceeds are not yet specified in this preliminary filing.

What does a secondary offering mean for RCUS stock?

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

How do I read a 424B5?

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 424B5 (prospectus (offering)): The final terms of an offering of shares or bonds.

How did RCUS stock react to this filing?

RCUS closed at $23.75 before the filing and $19.10 on Oct 21, 2026 (-19.58%). Five trading days later: $18.14 (-23.62%).

Other RCUS SEC filings

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