Tripadvisor stock jumped 10% Thursday after Starboard Value revealed a more than 9% stake in the online travel company, according to a securities filing.The position was valued at about $160 million as of Wednesday's close.Tripadvisor shares have been flat since the start of the year after plummeting more than 30% in 2024. Last year, the travel review and booking company said it created a special committee to explore potential options. ...