Google engineer charged with insider trading on Polymarket after $2.7m bet using search data

At a glance:

• Michele Spagnuolo, a Google security engineer, allegedly used internal search data to profit $1.2m on Polymarket's 2025 Year-in-Search contracts.
• The case marks the second federal prosecution tied to Polymarket and the first involving misappropriated data from a major Silicon Valley platform.
• Prosecutors used commodities-fraud statutes to target the prediction-market trade, highlighting regulatory gaps in non-traditional securities.

The charges and the case

Federal prosecutors in the Southern District of New York have charged Michele Spagnuolo, a 36-year-old Google information-security engineer based in Switzerland, with using non-public search-trend data to place $2.7m in bets on Polymarket and profit $1.2m. Spagnuolo, operating under the handle “AlphaRaccoon,” allegedly accessed internal Google tools to gather data on who would top the company’s Year-in-Search list, a market Polymarket launched in late 2025. The bets included a $1m wager against Kanye West’s wife Bianca Censori, $600,000 against Pope Leo XIV, and a significant position on singer D4vd at a near-zero probability price. When Google announced the results on December 4, 2025, D4vd’s win triggered Spagnuolo’s $1.2m profit, which he later moved out of the associated cryptocurrency wallet after removing the “AlphaRaccoon” name from his account.

The charges include commodities fraud, wire fraud, and money laundering, with the Commodity Futures Trading Commission (CFTC) filing a parallel civil case. The SDNY filing, supported by an FBI investigation, represents the most concrete application of U.S. securities-style insider-trading law to a prediction-market trade. Spagnuolo was arrested in Switzerland and is reportedly cooperating with the extradition process. Google has not yet indicated whether it will pursue civil action against the former employee.

Legal implications for prediction markets

The legal framing of the case is notable because Polymarket’s event contracts are regulated by the CFTC as derivatives, not by the SEC as securities. Insider-trading liability has traditionally been tied to the securities regime, but prosecutors here used the commodities-fraud statute to argue manipulation in a CFTC-regulated market. This approach could set a precedent for how similar cases are handled in the future, particularly as prediction markets grow in popularity. The Spagnuolo case also underscores the challenge of defining insider trading when the “insider” information comes from non-traditional sources like search trends rather than corporate earnings or mergers.

The prosecution’s strategy may influence how platforms like Polymarket and Kalshi handle data access and user monitoring. Polymarket founder Shayne Coplan has publicly argued that the platform’s pricing mechanisms are resilient to small numbers of informed traders, but the Year-in-Search market was reportedly small enough that Spagnuolo’s $2.7m position was visible in the order book. Polymarket’s surveillance team has not explained why the activity was not flagged before the December 2025 results, raising questions about oversight gaps.

Polymarket under regulatory pressure

The Spagnuolo case arrives amid heightened regulatory scrutiny of prediction markets. The U.S. House Oversight Committee, led by James Comer, launched a probe last Friday into whether Polymarket and Kalshi users are leveraging non-public information for trades. Spain blocked both platforms entirely on Tuesday, citing gambling-license violations, while India banned Polymarket on May 21, 2025. These actions suggest a global push to rein in platforms that blur the lines between gambling and financial markets.

A prior case involved a U.S. soldier who used inside information to bet on Venezuelan political outcomes, netting $400,000. That case, until now, was the only public criminal prosecution linked to Polymarket. The Spagnuolo charges elevate the profile of these investigations, shifting focus to high-level corporate insiders rather than individual traders. The outcome could determine whether prediction markets remain viable under current regulatory frameworks or face stricter oversight.

What's next for the industry

The case raises critical questions about data access and misuse in tech companies. Google’s internal tools, designed to analyze search trends, were allegedly exploited to gain an unfair advantage in a financial market. This incident may prompt stricter controls on employee access to sensitive data and clearer policies on external trading. For Polymarket, the challenge is proving its markets are fair and transparent, especially if large positions can influence outcomes without detection.

Spagnuolo’s cooperation with extradition and the CFTC’s civil case will likely shape the legal narrative. If convicted, the case could lead to tighter regulations on prediction markets, potentially redefining them as high-risk financial instruments. Meanwhile, the tech industry will watch closely to see how companies balance data accessibility with internal controls. The intersection of big tech, financial markets, and regulation is becoming increasingly complex, with this case serving as a test case for future oversight.

Broader implications for tech and finance

The Spagnuolo case highlights the evolving landscape of financial regulation in the digital age. As platforms like Polymarket democratize access to prediction markets, the line between informed trading and insider trading becomes murkier. Regulators may need to adapt existing frameworks to address scenarios where non-traditional data sources—like search trends or social media metrics—are used for financial gain.

For companies like Google, the incident underscores the risks of data exposure, even within internal systems. The engineer’s access to search trends, while legitimate for his role, was allegedly repurposed for personal profit. This could lead to stricter audits of employee trading activities and enhanced monitoring of data usage. The case also reflects growing concerns about the misuse of proprietary information in an era where data is increasingly commodified.

Conclusion

The charges against Michele Spagnuolo mark a pivotal moment for prediction markets and tech regulation. As the legal system grapples with how to classify and prosecute insider trading in non-traditional markets, platforms like Polymarket must navigate a tightening regulatory environment. The outcome will likely influence how companies manage data access and how financial oversight adapts to emerging technologies. For now, the case serves as a cautionary tale about the intersection of big tech, financial markets, and the law.