Atara Biotherapeutics, Inc. (ATRA) has 3 SEC Form 4 insider filings on record in the last 90 days. That includes 1 insider purchase totalling $1000K, and 1 sales totalling $41K. Most recent filing: Sept. 4, 2026.
Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.
Real-time Telegram alerts the moment a Form 4 is filed. Filings shown here are delayed by 72 hours.
Start free