On June 24, 2020 Atara Biotherapeutics, Inc. (Nasdaq:ATRA), a pioneer in T-cell immunotherapy leveraging its novel allogeneic EBV T-cell platform to develop transformative therapies for patients with severe diseases including solid tumors, hematologic cancers and autoimmune disease, reported that the underwriters of its recently closed underwritten offering of 12,633,039 shares of its common stock and pre-funded warrants to purchase 2,866,961 shares of its common stock have exercised in full their option to purchase an additional 2,325,000 shares of common stock at the public offering price less the underwriting discount (Press release, Atara Biotherapeutics, JUN 24, 2020, View Source [SID1234561483]). The aggregate net proceeds to Atara from the offering, including the shares sold pursuant to the underwriters’ option, after deducting underwriting discounts and commission and estimated offering expenses, were approximately $189.4 million. Pro forma cash, which is comprised of cash, cash equivalents and short-term investments as of March 31, 2020 of $214.6 million along with the aggregate net proceeds of $189.4 million from the offering, totals $404.0 million, and is expected to enable Atara to fund its planned operations into 2022.

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Citigroup, Cowen and Evercore ISI acted as joint book-running managers for the proposed offering. Mizuho Securities acted as lead manager and Canaccord Genuity acted as co-manager for the proposed offering.

The securities described above were 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 final prospectus supplement and accompanying prospectus relating to the proposed offering have been filed with the SEC and are available on the SEC’s website located at View Source Copies of the final prospectus supplement and the accompanying prospectus relating to the proposed offering 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; Cowen and Company, LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717, Attn: Prospectus Department, by telephone at (833) 297-2926, or by email at [email protected]; or Evercore Group L.L.C., Attention: Equity Capital Markets, 55 East 52nd Street, 35th Floor, New York, NY 10055, or by telephone at (888) 474-0200, or by email at [email protected].

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.