Isaac E. Ciechanover, Chief Executive Officer at Atara Biotherapeutics, Inc. (ATRA), sold 14,480 shares at $38.45 ($570K) on 2018-09-06, disclosed to the SEC on 2018-09-10.
Seasonal sale ($570k) by Chief Executive Officer — this insider has traded ATRA in September in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $38.45 | 2,780 | $107K | 18.8% |
| 2 | $38.45 | 2,780 | $107K | 18.8% |
| 3 | $39.42 | 1,120 | $44K | 7.7% |
| 4 | $39.74 | 2,073 | $82K | 14.5% |
| 5 | $39.74 | 2,073 | $82K | 14.5% |
| 6 | $40.23 | 1,827 |
| $74K |
| 12.9% |
| 7 | $40.23 | 1,827 | $74K | 12.9% |
| Total | $39.34 avg | 14,480 | $570K | 100% |
| Filing → |
| ATRA | SELL | 2019-04-29 | $262K | — | Filing → |
| ATRA | SELL | 2019-04-12 | $286K | — | Filing → |
| ATRA | SELL | 2019-04-01 | $81K | — | Filing → |