Is a Surprise Coming for Atara Biotherapeutics (ATRA) This Earnings Season? Posted byZacks Equity Research February 24, 2022 Leave a comment on Is a Surprise Coming for Atara Biotherapeutics (ATRA) This Earnings Season? Atara Biotherapeutics (ATRA) is seeing favorable earnings estimate revision activity and has a positive Zacks Earnings ESP heading into earnings season.