Arcus Biosciences Announces Commencement of Public Offering of Common Stock

Arcus intends to give underwriters a 30-day option to purchase up to an additional 15% of the shares offered.

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HAYWARD, Calif.--(BUSINESS WIRE)-- Arcus Biosciences, Inc. (NYSE: RCUS), a late clinical-stage biopharmaceutical company focused on developing differentiated molecules and combination therapies for the treatment of cancer and immune diseases, today announced that it has commenced an underwritten public offering of its common stock. All of the shares of common stock are being offered by Arcus Biosciences. In addition, Arcus Biosciences intends to grant the underwriters a 30-day option to purchase up to an additional 15% of the shares of its common stock offered in the public offering. The offering is subject to market and other conditions, and there can be no assurance as to whether or when the offering may be completed, or as to the actual size or terms of the offering.

Jefferies, Leerink Partners and TD Cowen are acting as joint book-running managers.

A shelf registration statement relating to these securities was filed with the U.S. Securities and Exchange Commission (SEC) on February 25, 2026, and automatically became effective upon filing. This offering is being made solely by means of a prospectus. A copy of the preliminary prospectus supplement and the accompanying prospectus relating to this offering may be obtained for free by visiting EDGAR on the SEC’s website at www.sec.gov. Alternatively, a copy of the preliminary prospectus supplement and the accompanying prospectus relating to this offering may be obtained by contacting: Jefferies LLC, Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, New York, New York 10022, or by telephone at (877) 821-7388, or by email at prospectus_department@jefferies.com; Leerink Partners LLC, Attention: Syndicate Department, 53 State Street, 40th Floor, Boston, MA 02109, or by telephone at (800) 808-7525 ext. 6105, or by email at syndicate@leerink.com; or TD Securities (USA) LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, or by email at TDManualrequest@broadridge.com.

This press release shall not constitute an offer to sell or a solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or other jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or other jurisdiction.

About Arcus Biosciences, Inc.

Arcus Biosciences is a late clinical-stage biopharmaceutical company focused on developing differentiated molecules and combinations for the treatment of cancer and immune diseases.

Forward Looking Statements

This press release contains forward-looking statements. All statements regarding events or results to occur in the future contained herein are forward-looking statements reflecting the current beliefs and expectations of management made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, including, but not limited to, statements regarding: the timing and completion of the offering and the satisfaction of customary closing conditions related to the offering. All forward-looking statements involve known and unknown risks and uncertainties and other important factors that may cause Arcus’s actual results, performance or achievements to differ significantly from those expressed or implied by the forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to risks associated with: the consummation of the offering; the completion of the offering on the anticipated terms or at all; uncertainties related to market conditions; the satisfaction of customary closing conditions related to the offering; and the impact of general economic, health, industrial or political conditions in the United States or internationally. Risks and uncertainties facing Arcus are described more fully in the “Risk Factors” section of Arcus’s most recent periodic report filed with the SEC. You are cautioned not to place undue reliance on the forward-looking statements, which speak only as of the date of this press release. Arcus disclaims any obligation or undertaking to update, supplement or revise any forward-looking statements contained in this press release except to the extent required by law.

The Arcus name and logo are trademarks of Arcus Biosciences, Inc. All other trademarks belong to their respective owners.

Source: Arcus Biosciences

View source version on businesswire.com: https://www.businesswire.com/news/home/20261021394178/en/

Investor Inquiries:
Pia Eaves
VP of Investor Relations & Strategy
(617) 459-2006
peaves@arcusbio.com

Media Inquiries:
Holli Kolkey
VP of Corporate Affairs
(650) 922-1269
hkolkey@arcusbio.com

Maryam Bassiri
Director, Corporate Affairs
(510) 406-8520
mbassiri@arcusbio.com

Source: Arcus Biosciences

Key Terms

underwritten public offering financial

An underwritten public offering is when a company sells new shares of its stock to the public with the help of a financial firm, called an underwriter. The underwriter agrees to buy all the shares upfront, reducing the company's risk, and then sells them to investors. This process helps companies raise money quickly and confidently from a wide range of buyers.

shelf registration statement regulatory

A shelf registration statement is a document a company files with regulators that allows it to sell shares or bonds quickly when it’s a good time to raise money. It’s like having a pre-approved plan ready so the company can act fast without going through lengthy paperwork each time they want to sell, making fundraising more flexible.

preliminary prospectus supplement regulatory

A preliminary prospectus supplement is an initial document that provides important details about a new stock or bond offering before it is finalized. It helps investors understand what is being sold and why, so they can decide whether to invest. Think of it as a preview before the full sales brochure is ready.