Basel, 9 December 2024 - Roche (SIX: RO, ROG; OTCQX: RHHBY) announced today that it has commenced a tender offer for all of the outstanding shares of common stock of Poseida Therapeutics, Inc. (Poseida) (NASDAQ: PSTX) at a price of $9.00 per share in cash, plus a non-tradeable contingent value right (CVR) to receive certain contingent payments of up to an aggregate of $4.00 per share in cash. The tender offer is being made pursuant to the previously announced merger agreement dated as of November 25, 2024 among Roche Holdings, Inc., an indirect wholly owned subsidiary of Roche Holding Ltd, Blue Giant Acquisition Corp., a wholly owned subsidiary of Roche Holdings, Inc., and Poseida.

The tender offer period will expire at one minute following 11:59 p.m., New York City time on 7 January, 2025, unless the offer is extended.

Roche has filed a tender offer statement on Schedule TO with the United States Securities and Exchange Commission (SEC). Blue Giant Acquisition Corp. is the acquirer in the tender offer. The Offer to Purchase contained within the Schedule TO sets out the terms and conditions of the tender offer.

Poseida has also filed a Solicitation/Recommendation Statement with the SEC on Schedule 14D-9, which includes the unanimous recommendation of the Poseida board of directors that Poseida stockholders tender their shares in the tender offer. Closing of the tender offer is conditioned upon customary closing conditions, including the receipt of required regulatory approvals, and there being validly tendered and not validly withdrawn a majority of the outstanding shares of Poseida common stock. The offer is not subject to any financing condition. Following successful completion of the tender offer, any shares not acquired in the tender offer will be acquired in a second step merger at the same price of $9.00 per share, plus the CVR. The closing of the transaction is expected to take place in the first quarter of 2025.

The complete terms and conditions are set out in the Offer to Purchase, which was filed with the SEC today, December 9, 2024. Poseida stockholders may obtain copies of all of the offering documents, including the Offer to Purchase, free of charge at the SEC’s website (www.sec.gov) or by directing a request for the Solicitation/Recommendation Statement on Schedule 14D-9 to Poseida’s website at www.poseida.com or the Offer to Purchase and the other related materials to MacKenzie Partners, Inc., the Information Agent for the offer, toll free at (800) 322-2885 (or please call (212) 929-5500 if you are located outside the U.S. or Canada) or via email at tenderoffer@mackenziepartners.com.

Before making any decision with respect to the Offer, investors are urged to read the Offer to Purchase and related documents, as well as the Solicitation/Recommendation Statement, because they contain important information about the Offer.

About Poseida Therapeutics

Poseida Therapeutics is a clinical-stage biopharmaceutical company advancing differentiated allogeneic cell therapies and genetic medicines with the capacity to cure. The Company’s pipeline includes investigational allogeneic CAR-T cell therapies for hematologic cancers, autoimmune diseases, and solid tumours, as well as investigational in vivo genetic medicines that address patient populations with high unmet medical need. The Company’s approach is based on its proprietary genetic editing platforms, including its non-viral transposon-based DNA delivery system, Cas-CLOVER™ Site-Specific Gene Editing System Booster Molecule and nanoparticle gene delivery technologies, as well as in-house GMP cell therapy manufacturing. The Company has formed strategic collaborations with Roche and Astellas to unlock the promise of cell therapies for cancer patients.

About Roche

Roche is a global pioneer in pharmaceuticals and diagnostics focused on advancing science to improve people’s lives. The combined strengths of pharmaceuticals and diagnostics under one roof have made Roche the leader in personalised healthcare – a strategy that aims to fit the right treatment to each patient in the best way possible.

Roche is the world’s largest biotech company, with truly differentiated medicines in oncology, immunology, infectious diseases, ophthalmology and diseases of the central nervous system. Roche is also the world leader in in vitro diagnostics and tissue-based cancer diagnostics, and a frontrunner in diabetes management.

Founded in 1896, Roche continues to search for better ways to prevent, diagnose and treat diseases and make a sustainable contribution to society. The company also aims to improve patient access to medical innovations by working with all relevant stakeholders. More than thirty medicines developed by Roche are included in the World Health Organization Model Lists of Essential Medicines, among them life-saving antibiotics, antimalarials and cancer medicines. Moreover, for the twelfth consecutive year, Roche has been recognised as one of the most sustainable companies in the Pharmaceuticals Industry by the Dow Jones Sustainability Indices (DJSI).

The Roche Group, headquartered in Basel, Switzerland, is active in over 100 countries and in 2020 employed more than 100,000 people worldwide. In 2020, Roche invested CHF 12.2 billion in R&D and posted sales of CHF 58.3 billion. Genentech, in the United States, is a wholly owned member of the Roche Group. Roche is the majority shareholder in Chugai Pharmaceutical, Japan