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ATRA #AtaraBiotherapeutics stock declines -5.8% in after hours trading. See the latest news.

After Hours Decliner

ATRA Atara Biotherapeutics9.81+1.03+11.7%

After Hours:9.24-0.57 (-5.8%)

Atara Biotherapeutics Announces First Quarter 2026 Financial Results and Operational Progress

Business WireTue, 12-May 4:05 PM

ATRA #AtaraBiotherapeutics stock declines -5.8% in after hours trading. See the latest news.

After Hours Decliner

ATRA Atara Biotherapeutics9.81+1.03+11.7%

After Hours:9.24-0.57 (-5.8%)

Atara Biotherapeutics Announces First Quarter 2026 Financial Results and Operational Progress

Business WireTue, 12-May 4:05 PM

ATRA #AtaraBiotherapeutics stock increases 3.8% after hours.

After Hours Gainer

ATRA #AtaraBiotherapeutics stock increases 12.7% after hours.

After Hours Gainer

ATRA #AtaraBiotherapeutics stock increases 6.0% after hours.

After Hours Gainer

ATRA #AtaraBiotherapeutics stock declines -50.7% in premarket,
Market Data Delayed 15 Minutes