ATRA insider buying
Every open-market purchase of Atara Biotherapeutics, Inc. (ATRA) stock by its officers, directors and major shareholders, from SEC Form 4 filings.
Bought, last 12 months$5.74M
Insiders buying (12m)2
Purchases on record2
Last purchase filedSep 4, 2026
In the last 12 months, 2 insiders of Atara Biotherapeutics, Inc. bought $5.74M of ATRA stock on the open market in 2 reported purchases. The most recent was filed on Sep 4, 2026: Cherry Brian N (Director) bought 104,166 shares at $9.60, worth $999.99K. The largest purchase on record here is $4.74M by EcoR1 Capital, LLC on May 7, 2026.
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