Trade Summary

6 days ago, Panacea Innovation Ltd, serving as 10% owner at Atara Biotherapeutics, Inc. (ATRA), sold 313,446 shares at $10.10 per share, for a total transaction value of $3,165,021.00. Following this transaction, Panacea Innovation Ltd now holds 1,318,894 shares of ATRA.

This sale represents a 19.00% decrease in Panacea Innovation Ltd's stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Thursday, May 7, 2026 and publicly disclosed via SEC Form 4 filing on Monday, May 11, 2026, 4 days after the trade was made.

Atara Biotherapeutics, Inc. operates in the HEALTHCARE sector, specifically within the BIOTECHNOLOGY industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.