Atara Biotherapeutics, Inc. (ATRA:NASDAQ) closed at $8.59 on October 23, 2026, down 8.91% on the day. The stock trades 55.1% below its 52-week high of $19.15 and 119.1% above its 52-week low of $3.92. Over the past year, it lost 40.7%. Atara Biotherapeutics, Inc. is part of the Health Care sector (Biotechnology: Biological Products (No Diagnostic Substances)).
In 252 trading sessions since October 23, 2025, ATRA closed higher on 122 days (48%). Its best day was May 7, 2026 (+92.82%) and its worst was January 12, 2026 (-56.99%). The stock moved 10% or more in a single session 20 times. It opened at least 5% above the previous day's high 3 times.
Atara Biotherapeutics, Inc., a clinical-stage biopharmaceutical company, focuses on developing therapeutics for the treatment of muscle wasting conditions and oncology. Its lead product candidate is PINTA 745, which is in a Phase II clinical trial for the treatment of protein-energy wasting in end-stage renal disease patients. The company is also developing STM 434, a targeted therapy for ovarian cancer and other solid tumors; and a pipeline of product candidates that are in preclinical development. Atara Biotherapeutics, Inc. was founded in 2012 and is headquartered in Brisbane, California.
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Based on end-of-day data. For information only, not investment advice.