Google Engineer’s $1.2m Betting Scheme Draws Regulatory Focus

Federal prosecutors have filed another insider trading case tied to prediction markets, adding to regulatory pressure on a sector that has expanded rapidly over the past two years. The latest case alleges that Google engineer Michele Spagnuolo used internal company information to earn more than $1.2 million from bets placed on Polymarket.

According to the Department of Justice, Spagnuolo used non-public Google search data before it was released and placed around $2.7 million in wagers between October and December 2025. Prosecutors claim the bets were linked to Google’s annual most-searched rankings and generated more than $1 million in profit.

Google said it is cooperating with investigators and has placed Spagnuolo on leave. Polymarket said it worked with law enforcement during the case. The charges come only a month after prosecutors accused a US Army soldier of using classified information to place prediction market bets, putting more attention on how operators monitor activity and spot betting linked to information that is not yet public.

For operators, the question is no longer only how fast prediction markets can grow. Regulators are increasingly focused on market integrity, surveillance systems, and how operators respond when participants may have access to information unavailable to the wider market.

That discussion could have broader implications for the sector. Sportsbooks already operate under integrity and suspicious betting frameworks. If regulators move toward similar expectations for prediction markets, operators may face new compliance requirements around monitoring, reporting, and information controls.

TGJ Take

Two insider trading cases in a month give regulators a clear reason to ask tougher questions about prediction markets. For operators, the issue is no longer how quickly these products are growing. The focus is shifting to market integrity, surveillance, and how firms detect users who may have access to information that is not public. Sportsbooks already deal with these challenges every day. Prediction market operators should expect pressure to meet similar standards if cases like this continue to emerge.