Isaac E. Ciechanover, Chief Executive Officer at Atara Biotherapeutics, Inc. (ATRA), sold 2,200 shares at $22.85 ($50K) on 2019-05-29, disclosed to the SEC on 2019-05-31.
Seasonal sale ($50k) by Chief Executive Officer — this insider has traded ATRA in May in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.
| Filing → |
| ATRA | SELL | 2019-04-29 | $262K | — | Filing → |
| ATRA | SELL | 2019-04-12 | $286K | — | Filing → |
| ATRA | SELL | 2019-04-01 | $81K | — | Filing → |