Ouster (NYSE:OUST) CTO Mark Frichtl Sells 30,000 Shares of Stock Ouster, Inc. (NYSE:OUST – Get Free Report) CTO Mark Frichtl sold 30,000 shares of the business’s stock in a transaction that occurred on Friday, April 17th. The stock was sold at an average price of $25.15, for a total transaction of $754,500.00. Following the completion of the sale, the chief technology officer owned 712,297 shares of the company’s stock, valued at approximately $17,914,269.55.