Tripadvisor stock surges 17% as Starboard Value builds sizable stake in online travel company

• Tripadvisor's stock jumped after Starboard Value disclosed a more than 9% stake in the online travel company in a securities filing.
• The stake was valued at about $160 million as of Wednesday's close.
• Tripadvisor shares are flat since the start of the year after plummeting more than 30% in 2024.

Tripadvisor stock jumped 17% 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.

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Starboard Value has gained a reputation for pushing for changes such as new CEOs and cost cuts by acquiring significant shares in companies.

Most recently, the firm settled a proxy fight with Autodesk, where it gained two board seats. It has previously pushed for changes at Tinder parent Match Group, pharmaceutical giant Pfizer and Salesforce.

The Wall Street Journal was the first to report the news late Wednesday.

Both Starboard Value and Tripadvisor did not immediately respond to CNBC's request for comment.