On July 18, 2019 Atara Biotherapeutics, Inc. (Nasdaq:ATRA), a leading off-the-shelf, allogeneic T-cell immunotherapy company developing novel treatments for patients with cancer, autoimmune and viral diseases, reported that it has commenced an underwritten public offering of $125,000,000 of shares of its common stock (Press release, Atara Biotherapeutics, JUL 18, 2019, View Source [SID1234537613]). In connection with the proposed offering, Atara Biotherapeutics expects to grant the underwriters a 30-day option to purchase up to an additional $18,750,000 of shares of its common stock at the public offering price, less the underwriting discounts and commissions. All of the shares in the proposed offering will be sold by Atara Biotherapeutics. The proposed offering is subject to market and other conditions, and there can be no assurances as to whether or when the proposed offering may be completed, or as to the actual size or terms of the proposed offering.

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Citigroup, Goldman Sachs & Co. LLC and Cowen are acting as joint book-running managers for the proposed offering. Mizuho Securities and Canaccord Genuity are acting as co-managers.

The shares described above are being offered by Atara Biotherapeutics pursuant to a shelf registration statement on Form S-3, including a base prospectus, that was previously filed by Atara Biotherapeutics with the Securities and Exchange Commission (the "SEC") and that became automatically effective on February 27, 2018. A preliminary prospectus supplement and accompanying prospectus relating to the proposed offering will be filed with the SEC and will be available on the SEC’s website located at View Source Copies of the preliminary prospectus supplement and the accompanying prospectus relating to the proposed offering, when available, may be obtained from: Citigroup, by mail at Citigroup Global Markets Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, or by telephone at 1-800-831-9146; Goldman Sachs & Co. LLC, by mail at Goldman Sachs & Co. LLC, Attention: Prospectus Department, 200 West Street, New York, NY 10282, by telephone at 1-866-471-2526, or by email at [email protected]; or Cowen, by mail at Cowen and Company, LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, Attention: Prospectus Department, by telephone at 1-631-592-5973, or by email at [email protected]. The final terms of the proposed offering will be disclosed in a final prospectus supplement to be filed with the SEC.

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