Panacea Innovation Ltd, 10% Owner at Atara Biotherapeutics, Inc. (ATRA), sold 313,446 shares at $10.10 ($3.2M) on 2026-05-07, disclosed to the SEC on 2026-05-11.
Open-market sale of $3.2M ATRA by 10% Owner. 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.