Atara Biotherapeutics (ATRA) prices $16 million offering

Atara Biotherapeutics, Inc. (Nasdaq: ATRA), a leader in T-cell immunotherapy, leveraging its novel allogeneic Epstein-Barr virus (EBV) T-cell platform to develop transformative therapies for patients with cancer and autoimmune diseases, today announced the pricing of an offering of 834,237 shares of its common stock at an offering price of $6.61 per share and pre-funded warrants to purchase 1,587,108 shares of its common stock at an offering price of $6.6099 per pre-funded warrant share in an underwritten registered direct offering to a limited number of existing institutional investors, including entities affiliated with Adiumentum Capital Management, EcoR1 Capital, Panacea Venture and Redmile Group. The pre-funded warrants will have an exercise price of $0.0001 per share and will be immediately exercisable upon issuance. The offering is expected to close on or about May 16, 2025, subject to the satisfaction of customary closing conditions.

The gross proceeds from the offering are expected to be $16 million, before deducting underwriting discounts and commissions and estimated offering expenses payable by Atara. Atara currently intends to use the net proceeds from the offering to fund its ongoing activities required to achieve biologics license application (BLA) approval for tab-cel, and for working capital and general corporate purposes.

TD Cowen is acting as the sole bookrunner for the offering.

The securities described above are being offered by Atara pursuant to a shelf registration statement on Form S-3 (No. 333-275256), including a base prospectus, that was previously filed by Atara with the U.S. Securities and Exchange Commission (the “SEC”) on November 1, 2023 and was declared effective on November 13, 2023. A prospectus supplement containing additional information relating to the offering will be filed with the SEC and will be available on the SEC’s website located at http://www.sec.gov. Copies of the final prospectus supplement and the accompanying prospectus relating to the offering, when available, may also be obtained by contacting TD Securities (USA) LLC, 1 Vanderbilt Avenue, New York, NY 10017, by telephone at (855) 495-9846 or by email at [email protected]

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