Atara Biotherapeutics, Inc. (NASDAQ: ATRA) today announced the pricing of an underwritten public offering of 12,633,039 shares of its common stock at a price to the public of $11.32 per share and, to certain investors, pre-funded warrants to purchase 2,866,961 shares of its common stock at a purchase price of $11.3199 per pre-funded warrant share, which represents the per share public offering price for the common stock, minus the $0.0001 per share exercise price of each such pre-funded warrant share. The aggregate gross proceeds from the offering are expected to be approximately $175.5 million, before deducting the underwriting discounts and commissions and estimated offering expenses payable by Atara Biotherapeutics. The offering is expected to close on or about May 29, 2020, subject to customary closing conditions. In connection with the offering, Atara Biotherapeutics has granted the underwriters a 30-day option to purchase up to an additional 2,325,000 shares of its common stock at the public offering price, less the underwriting discounts and commissions.

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