Basel, 8 January 2025 – Roche (SIX: RO, ROG; OTCQX: RHHBY) announced today that Roche’s wholly owned subsidiary Blue Giant Acquisition Corp. has accepted for payment all shares validly tendered and not validly withdrawn pursuant to its tender offer for all outstanding shares of common stock of Poseida Therapeutics, Inc. (“Poseida”, NASDAQ: PSTX) at a price of $9.00 per share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 expired at one minute following 11:59 p.m., New York City time on 7 January, 2025, and was not extended. Citibank, N.A., the depositary for the tender offer, advised Roche that a total of approximately 64,991,586 shares of Poseida’s common stock were validly tendered and not validly withdrawn in the tender offer (excluding shares tendered by notice of guaranteed delivery for which certificates have not yet been “received”), which represent approximately 66.11% of the total number of shares of Poseida’s common stock outstanding. Later today, Roche intends to complete the acquisition of Poseida through a merger of Blue Giant Acquisition Corp. with and into Poseida without a vote or meeting of Poseida’s stockholders. In the merger, all shares of Poseida not owned by Poseida, Roche or Roche’s wholly owned subsidiaries (other than shares as to which appraisal rights have been validly exercised under Delaware law) will be converted into the right to receive the same consideration per share, including the CVR, as was received for shares validly tendered in the tender offer. Following completion of the merger, Poseida will become a wholly owned subsidiary of Roche, and Poseida’s shares will cease to be traded on the Nasdaq Global Select Market.