DOJ Charges Google Employee Over Polymarket Trading Scheme

Federal prosecutors have charged a Google software engineer with insider trading after authorities alleged he used confidential internal company data to profit on the prediction market platform Polymarket.

According to reports from United States Department of Justice and multiple media outlets, Michele Spagnuolo allegedly earned roughly $1.2 million through bets tied to Google’s internal search trend data before that information became public.

Prosecutors allege Spagnuolo used confidential Google data between October and December 2025 while trading under the username “AlphaRaccoon” on Polymarket. Authorities said the engineer placed approximately $2.75 million in wagers tied to Google’s annual “Year in Search” rankings, using nonpublic company information to predict outcomes before official release dates.

The charges include commodities fraud, wire fraud, and money laundering. Prosecutors said the case represents one of the most significant insider trading prosecutions involving prediction markets to date. Google confirmed the employee had been placed on leave and said the company is cooperating with investigators.

Prediction Markets Continue Expanding

Prediction markets have rapidly grown over the past two years as platforms allow users to trade contracts tied to political events, entertainment outcomes, financial developments, sports, and world news. Unlike traditional sportsbooks, prediction markets function more like exchanges where users buy and sell positions that reflect the probability of an event occurring.

Platforms such as Polymarket and Kalshi have become major players in the event contract industry. Traders can speculate on politics and elections, economic reports, geopolitical events, weather outcomes, and sports by purchasing contracts that fluctuate in value as market sentiment changes.

Polymarket has experienced especially rapid growth since 2025 after re-entering the United States market through regulatory partnerships and acquisitions. The company now hosts markets tied to everything from presidential elections and Federal Reserve decisions to entertainment awards and sports championships.

Sports Prediction Markets Draw Growing Interest

Sports-related event contracts have become one of the fastest-growing sectors within prediction markets. World Cup soccer markets, NBA Finals betting, NFL futures, and player award markets have all generated significant trading activity in recent months.

For example, World Cup prediction markets currently allow traders to speculate on:

• Tournament winners
• Golden Boot winners
• Group-stage advancement
• Match-by-match outcomes
• Furthest advancing host nation

Platforms including Kalshi and Polymarket have seen heavy trading volume surrounding the 2026 FIFA World Cup, particularly involving players such as Kylian Mbappé, Harry Kane, and Lionel Messi in Golden Boot markets.

Supporters of prediction markets argue they provide a more efficient, information-driven alternative to traditional betting because prices constantly adjust based on collective market expectations. Critics, however, have increasingly raised concerns about insider information, market manipulation, and ethical issues surrounding event-based trading.

Insider Trading Concerns Continue Growing

The Google case is not the first insider trading controversy involving prediction markets this year. Federal authorities have already investigated several cases tied to geopolitical and military event contracts, including allegations involving bets connected to military operations and international conflicts.

Legal experts say the latest charges demonstrate that insider trading laws can still apply to event contract markets, even when those markets fall outside traditional stock trading.

Prosecutors emphasized that using confidential information to profit from prediction markets undermines market integrity in the same way insider trading affects financial markets.

The case is expected to increase scrutiny on the rapidly expanding prediction market industry as regulators and lawmakers continue debating whether event contracts should be treated more like financial instruments, traditional gambling products, or a separate category altogether.