A Google software engineer has been charged with using confidential search data to place bets on Polymarket, winning about $1.2 million. This case raises concerns about prediction markets and could impact regulatory views on insider trading in decentralized platforms. Michele Spagnuolo, who has worked with Google since 2014 and is based in Zurich, faces serious allegations that include commodities fraud and wire fraud. Prosecutors allege he accessed restricted internal data from the company’s “Year in Search 2025” tool to inform his betting under a pseudonym.
#What actions did the engineer take?
Spagnuolo allegedly made at least 16 bets related to Google search trends between mid-October and early December 2025. By using non-public data classified as “Google Confidential,” he gained an unfair advantage over other bettors. One of his most significant wins was accurately predicting the singer D4vd would be the most-searched individual on Google for 2025. Overall, Spagnuolo wagered around $2.75 million and eventually netted profits close to $1.2 million.
The unusual accuracy of his betting patterns drew attention from authorities, leading to his arrest in December 2025. He was released later that day after posting a $2.25 million bond. He now faces potential prison time ranging from 10 to 20 years based on the various charges he has incurred.
#How does this case influence prediction markets?
This incident marks a significant federal prosecution that applies conventional insider trading principles to prediction markets. The government’s stance indicates that it does not view Polymarket merely as an ambiguous cryptocurrency platform, but rather as one subject to the same regulations that govern traditional commodities transactions. Following Spagnuolo’s actions, Polymarket updated its regulations to ban trades based on confidential non-public information.
If these charges are upheld, the ramifications could lead to stricter compliance requirements for prediction market operators. Such measures might include enhanced identification protocols and monitoring systems to detect insider activities. For participants, it serves as a clear warning that leveraging insider information for betting on platforms like Polymarket might result in severe consequences, reinforcing the need for ethical trading practices.