X0306 4 2017-02-06 0 0001604464 Atara Biotherapeutics, Inc. ATRA 0001403571 Turner Heather D C/O ATARA BIOTHERAPEUTICS, INC. 611 GATEWAY BOULEVARD, SUITE 900 SOUTH SAN FRANCISCO CA 94080 0 1 0 0 EVP, General Counsel & Sec. Common Stock 2017-02-06 4 A 0 49500 0.00 A 98357 D These restricted stock units vest in four equal annual installments on each of the first, second, third and fourth anniversaries of the grant date, subject to the reporting person's continuous service. /s/ Tina Gullotta, Attorney-in-Fact for Heather D. Turner 2017-02-08