Joe Newell, Chief Operations Officer at Atara Biotherapeutics, Inc. (ATRA), sold 10,500 shares at $17.00 ($179K) on 2021-09-22, disclosed to the SEC on 2021-09-24.
Open-market sale of $178k ATRA by Chief Operations Officer. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Nothing distinguishes this filing.
| Filing → |
| ATRA | SELL | 2021-09-17 | $49K | — | Filing → |
| ATRA | SELL | 2021-08-31 | $53K | — | Filing → |
| ATRA | SELL | 2021-08-19 | $30K | — | Filing → |