During the last quarter, Utpal Koppikar has sold $29,937.60 in Atara Biotherapeutics stock. Most recently, Utpal Koppikar sold 5,940 shares of the business's stock in a transaction on Tuesday, August 16th. The shares were sold at an average price of $5.04, for a transaction totalling $29,937.60. Following the completion of the sale, the chief financial officer now directly owns 197,589 shares of the company's stock, valued at $995,848.56. Learn More on Utpal Koppikar's trading history.