Dietmar Berger serves as Executive at Atara Biotherapeutics, Inc., where they oversee executive responsibilities. Since joining the company, Dietmar Berger has executed 7 insider transactions totaling $0, demonstrating a balanced approach to their equity position. Their most recent transaction on Jan 2, 2026 involved exercising options for 16,326 shares valued at $0.
Dietmar Berger currently holds 41,179 shares of Atara Biotherapeutics, Inc. (ATRA), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Dietmar Berger has been a net neutral trader of ATRA stock. They have purchased $0 and sold $0 worth of shares.
Dietmar Berger's most recent insider trade was on Jan 2, 2026, when they sold 16,326 shares at $0.00 per share.
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| $121.60 |
| Discretionary |
| Jan 2, 2026 | GILD | $0 | Option Exercise | 16,326 | $N/A | Discretionary |
| May 7, 2019 | ATRA | $144.6K | Payment | 4,322 | $33.46 | Discretionary |
| Mar 26, 2019 | ATRA | $0 | Award | 15,000 | $N/A | Discretionary |
| Feb 6, 2019 | ATRA | $0 | Award | 25,000 | $N/A | Discretionary |
| May 7, 2018 | ATRA | $0 | Award | 50,000 | $N/A | Discretionary |