AnhCo Nguyen, President and CEO at Atara Biotherapeutics, Inc. (ATRA), sold 5,241 shares at $9.13 ($48K) on 2026-05-18, disclosed to the SEC on 2026-05-20.
Open-market sale of $48k ATRA by President and CEO. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Something here stands out, but not much.
| Filing → |
| ATRA | SELL | 2025-11-19 | $38K | — | Filing → |
| ATRA | SELL | 2025-08-20 | $34K | — | Filing → |
| ATRA | SELL | 2025-05-20 | $22K | — | Filing → |