Research and Analysis Report on the Google Engineer Charged with Insider Trading on Polymarket

I. Executive Summary

On May 27, 2026, the U.S. Attorney's Office for the Southern District of New York and the U.S. Commodity Futures Trading Commission (CFTC) disclosed that Google software engineer Michele Spagnuolo had been charged with using non-public “Year in Search 2025” data accessible through Google's internal systems to trade related event contracts on the prediction market platform Polymarket. The alleged trades were conducted through an account named “AlphaRaccoon” and allegedly generated approximately USD 1.2 million in profit.

This incident is not a traditional smart contract exploit or on-chain asset theft. It is a typical information-security incident in the Web3 prediction market sector. The core risk is that prediction market contracts are tied to real-world event outcomes. If certain outcomes depend on non-public information held by companies, governments, military organizations, media outlets, sports leagues, or other institutions, insiders may be able to trade before public disclosure, undermining market fairness and price discovery.

The importance of this case lies in how it expands the scope of Web3 security from “code vulnerabilities, stolen private keys, and smart contract attacks” to four additional dimensions: misuse of non-public information, employee access governance, on-chain transaction monitoring, and prediction market regulation. It also shows that even when Web3 platforms have on-chain transparency, they do not automatically prevent insider trading; instead, on-chain data often plays a greater role in post-incident tracing, investigation, and evidence collection.

II. Basic Facts of the Case

The defendant, Michele Spagnuolo, is a Google software engineer residing in Switzerland. According to the Department of Justice, he has been charged with violating the Commodity Exchange Act, wire fraud, and money laundering. A violation of the Commodity Exchange Act carries a maximum sentence of 10 years in prison, while wire fraud and money laundering each carry a maximum sentence of 20 years. On the same day, the CFTC filed a civil action seeking a permanent injunction, disgorgement of allegedly unlawful gains, restitution to affected market participants, and civil monetary penalties.

According to the prosecution, Spagnuolo was able to access unpublished “Year in Search 2025” data through an internal Google tool that displayed a “Google Confidential” label. Google’s annual search-trend rankings have commercial value because their public release can drive user attention, media coverage, brand value, and advertising-related benefits. Therefore, before official publication, the rankings were considered non-public information with commercial value.

Polymarket is a prediction market platform where users can buy and sell “YES/NO” shares tied to future event outcomes. Share prices typically fluctuate between USD 0 and USD 1 and reflect the market’s estimate of the probability that a given event will occur. For example, if a “YES” share is priced at USD 0.30, the market is broadly implying a 30% probability of that event occurring. If the event ultimately occurs, the correct shares settle at USD 1; incorrect shares settle at zero.

In this case, Polymarket hosted markets related to Google’s “Year in Search 2025” rankings, such as whether a person would become the top Google search trend of the year or whether a person would enter the top five. Because the final outcomes depended on data later published by Google, while Google insiders could potentially know the results earlier, these markets naturally carried insider-information risk.

III. Key Timeline

1. Around May 2024: Creation of the AlphaRaccoon account

Court filings indicate that a Polymarket account once using the name “AlphaRaccoon” was created around May 2024. The account was later allegedly used to trade in markets related to Google Year in Search.

2. October 2025: Polymarket launches Google search-trend markets

In October 2025, Polymarket began offering binary event contracts related to Google’s 2025 search-trend rankings, including markets such as “who will be the top Google search trend in 2025” and “who will enter the top five Google search trends in 2025.” These markets were to be settled based on Google’s later public release of the Year in Search results.

3. October 15 to December 4, 2025: Alleged concentrated trading activity begins

The Department of Justice states that between October 15 and December 4, 2025, Spagnuolo allegedly used the AlphaRaccoon account to commit approximately USD 2.754 million to trades across multiple Google Year in Search markets. The CFTC’s civil complaint states that he bought YES or NO shares in at least 23 related event contracts and predicted the outcomes with near-perfect accuracy.

4. November 27, 2025: Key trading point

Court filings allege that Spagnuolo accessed internal Google Year in Search data again on November 27, 2025. At that time, the internal data allegedly showed that d4vd had replaced Kendrick Lamar as the top Google “person” search trend of 2025. Approximately three hours later, the AlphaRaccoon account allegedly placed bets on d4vd entering the top five and becoming number one. Because the market at that time considered d4vd’s chance of becoming number one to be close to zero, a successful trade of that type would have produced an extremely high return.

5. December 4, 2025: Google releases Year in Search results

Google released its Year in Search results on December 4, 2025. The related Polymarket markets were then settled. Prosecutors allege that the AlphaRaccoon account earned approximately USD 1.2 million in profits from the related trades.

6. After December 2025: Alleged fund transfers and identity concealment

Court filings state that after the related markets were settled, the AlphaRaccoon account received approximately 3.914 million USDC.e and transferred approximately 5.045 million USDC.e to a cryptocurrency wallet. The funds were then allegedly transferred, exchanged, and moved through privacy-oriented crypto services. Prosecutors also allege that after social media and Discord communities began discussing whether AlphaRaccoon might be a Google insider, the account removed the “AlphaRaccoon” username and reverted to an alphanumeric wallet-address format.

IV. Analysis of the Trading Structure and Profit Logic

The trading logic behind the incident is not complex, but the risk it exposes is highly representative.

First, prediction market prices essentially represent “market probabilities.” When the market lacks accurate information, certain low-probability events may be underestimated. For example, d4vd’s chance of becoming the top Google search trend of the year was close to zero in the market. However, if someone already knew that outcome through internal data, that person could buy YES shares at a low price and wait for the result to be publicly released, at which point the shares would settle at USD 1.

Second, the methodology behind Google Year in Search is not simply “highest total search volume.” Rather, it focuses on “fastest-growing search interest” or the most trend-defining queries of the year. This means that even if the public knows which people are popular, ordinary traders may still be unable to accurately predict the final rankings. Someone with knowledge of the internal methodology and internal ranking data would have a stronger information advantage than ordinary market participants.

Third, the AlphaRaccoon account allegedly did not only bet on a single extremely unlikely outcome. According to court documents, it also placed substantial NO-direction trades on certain people not becoming number one or not entering the top five. Examples include markets involving Bianca Censori, Pope Leo XIV, and Donald Trump. Such trades may appear to offer lower returns, but if the trader truly knows the final rankings, the risk is effectively compressed, creating a “low-risk, high-certainty” arbitrage opportunity.

Fourth, the incident exposes a special vulnerability of prediction markets. Traditional securities-market insider trading usually revolves around corporate financial data, mergers and acquisitions, earnings, regulatory approvals, and similar information. Prediction markets, however, can financialize almost any real-world event. As a result, sources of insider information expand from listed-company insiders to search-engine companies, government agencies, military organizations, courts, sports leagues, media organizations, data providers, platform operators, and major internet companies.

V. Nature of the Case: Not a "Hack," but Misuse of Information Access

From a Web3 security perspective, this case does not involve a smart contract vulnerability, cross-chain bridge attack, private-key theft, or on-chain protocol exploit. It is better understood as an information-access misuse incident.

The security chain can be summarized as follows:

·       Access to internal data

·       Acquisition of unpublished outcomes

·       Position building in on-chain or quasi-on-chain prediction markets

·       Waiting for the official result release

·       Market settlement and profit realization

·       Fund transfer, exchange, and privacy-oriented movement

·       Community detection of anomalies and regulatory intervention

This chain shows that Web3 security threats are not limited to hackers. They also include insiders who have lawful access to systems but violate their duties of trust. Traditional enterprise security controls such as least privilege, sensitive data classification, access auditing, employee behavior monitoring, and conflict-of-interest declarations are becoming directly relevant to Web3 market integrity.

VI. Regulatory and Legal Significance

The regulatory significance of this case is reflected in three main areas.

First, regulators are increasingly treating prediction markets as genuine financial markets rather than simple entertainment or betting products. In its civil complaint, the CFTC treated the relevant event contracts as swaps and alleged that non-public information could materially affect the prices of those contracts. In this sense, the information constituted material information affecting market prices.

Second, the Department of Justice is extending the enforcement logic of “insider trading” to prediction markets. Traditional insider-trading enforcement has focused primarily on securities and futures markets. This case shows that if a trader uses material non-public information obtained through a duty of confidentiality to profit in event-contract markets, the conduct may also trigger criminal risks such as commodities fraud, wire fraud, and money laundering.

Third, the case reinforces the enforcement message that “prediction markets are not a safe harbor for insider trading.” In April 2026, the Department of Justice disclosed another case involving a military service member accused of using classified information about military operations to profit from Polymarket bets. The current case involves an employee of a technology company, showing that the risk has expanded from national-security information to commercial and platform data.

VII. Impact on Polymarket

The impact of this case on Polymarket is two-sided.

On one hand, the incident increases public concern about insider-trading risk in prediction markets. The advantage of prediction markets is their ability to convert dispersed information into price signals. However, if price signals primarily come from a small group of insiders holding non-public information, “wisdom of the crowd” may become “insider arbitrage.” This could weaken ordinary participants’ trust in market fairness.

On the other hand, Polymarket may also present the case as an example of on-chain transparency and platform cooperation with law enforcement. Reuters, Axios, and The Verge all reported that Polymarket said it cooperated with the investigation and emphasized that blockchain transactions are transparent and traceable. In other words, Web3 transparency does not inherently prevent improper trading, but it can support post-incident tracing, fund-flow analysis, and law-enforcement work.

However, the platform still faces a more fundamental question: if the outcome of a market depends heavily on internal data held by a specific institution, should the platform conduct an “insider-information risk assessment” before listing that market? Google search rankings, internal product releases, sports-league disciplinary actions, military operations, regulatory approvals, court judgments, and unpublished media awards may all carry high sensitivity to insider information.

VIII. Impact on Google

From Google's perspective, this case shows that enterprise internal data security governance can no longer focus only on “preventing leaks” and “preventing competitors from gaining access.” It must also address the emerging risk of “employees using internal data to trade in external markets.”

Google Year in Search data has marketing value, brand value, and trade-secret value before publication. Even if such data is not listed-company financial information, it may become a tradable asset once it determines the outcome of a prediction market contract. In other words, the existence of prediction markets changes the risk attributes of internal corporate data: information that previously affected only brand communication or marketing timing may now correspond directly to external financialized trading instruments.

Companies therefore need to redefine the scope of “material non-public information.” For large technology companies, search trends, product release schedules, advertising-ranking rules, AI model launch dates, App Store rankings, cloud-service incident reports, content-recommendation rankings, annual reports, and user-growth data may all be financialized by external markets and become objects of insider trading.

IX. Core Risk Matrix

X. Governance Recommendations

1. Recommendations for Web3 Prediction Market Platforms

First, establish an “insider-information risk assessment” mechanism before listing markets. Platforms should identify which outcomes are controlled or known in advance by a small number of organizations, such as company rankings, government actions, court judgments, sports disciplinary decisions, and media awards. For high-risk markets, platforms should impose position limits, delay listings, raise the monitoring level, or refuse to list the market.

Second, build anomaly detection models for suspicious trading. Key indicators include sudden large inflows into obscure markets, one-sided trading shortly before result publication, concentrated bets from new or low-activity wallets, trading directions that diverge sharply from public probabilities but later prove highly accurate, and systematic “near-perfect” results across multiple related markets.

Third, strengthen KYC, wallet clustering, and fund-flow tracing. Platforms should not rely solely on wallet addresses as identity markers. They should combine on-chain analytics, trading behavior, fund sources, deposit and withdrawal channels, device fingerprints, and suspicious linked accounts to identify true risk actors.

Fourth, introduce restricted-person mechanisms. For certain markets, platforms may require personnel from outcome-source institutions, related companies, government contractors, sports leagues, media partners, and similar groups to refrain from trading or to make prior disclosures.

Fifth, establish rapid freezing and law-enforcement cooperation procedures. When a platform detects obvious suspected insider trading, it should be able to freeze suspicious accounts, preserve evidence, report to regulators, and cooperate with investigations.

2. Recommendations for Enterprise Internal Security and Compliance

First, include prediction markets, crypto-asset trading, and event contracts in employee codes of conduct. Companies should not only prohibit employees from using insider information to trade stocks; they should also explicitly prohibit the use of non-public company information to trade on Polymarket, Kalshi, and other prediction markets or crypto-financialized platforms.

Second, implement stricter access controls for high-value internal data. Annual rankings, product release schedules, search trends, internal statistics, advertising data, and model launch timelines that may carry external trading value should be governed through least privilege, access approvals, audit trails, and abnormal-query alerts.

Third, establish a “sensitive data tradability assessment.” Companies should periodically assess which internal information may be financialized by external markets. If a ranking, rating, release date, or regulatory interaction outcome is traded externally, it should be included within the scope of material non-public information management.

Fourth, strengthen employee compliance training. Training should cover insider trading in prediction markets, crypto-asset money-laundering risks, on-chain traceability, corporate confidentiality duties, and criminal liability. Engineers, security personnel, data analysts, product managers, and marketing staff with access to sensitive systems should receive higher-level training.

Fifth, conduct linked analysis between access logs and external trading signals. When a company identifies abnormal access to sensitive data, it should combine internal logs with public on-chain data, social-media discussions, and external platform notifications to assess whether data misuse may have occurred.

3. Recommendations for Regulators

First, clarify the legal status and regulatory boundaries of event contracts. Prediction markets have long existed in a gray zone between financial contracts, gambling, speech markets, and information markets. Regulators need to clarify which event contracts fall under CFTC jurisdiction, which fall under state gambling regulation, and which require additional market-integrity requirements.

Second, promote market-integrity standards for platforms. Regulatory requirements should not focus only on registration and trading authorization. They should also cover insider-trading monitoring, restricted-person management, suspicious-transaction reporting, KYC/AML, data retention, customer protection, and market-manipulation prevention.

Third, establish cross-agency coordination mechanisms. Prediction market incidents may involve securities, commodities, crypto assets, national security, trade secrets, and data security. The CFTC, Department of Justice, SEC, FinCEN, state regulators, and enterprise security teams need more efficient information-sharing mechanisms.

Insight Report Source: Global Cybersecurity Alliance
https://www.gcsa.org

Sources and Fact-Checking

The factual content of this report is primarily based on the following public sources:

·       U.S. Attorney’s Office for the Southern District of New York press release: https://www.justice.gov/usao-sdny/pr/google-employee-charged-insider-trading

·       U.S. Department of Justice criminal complaint: https://www.justice.gov/usao-sdny/media/1442621/dl

·       CFTC civil enforcement release: https://www.cftc.gov/PressRoom/PressReleases/9237-26

·       Reuters report: https://www.reuters.com/legal/litigation/us-charges-google-engineer-with-insider-trading-polymarket-2026-05-27/

·       Axios report: https://www.axios.com/2026/05/27/google-worker-polymarket-bets-inside-information-charges

·       The Verge report: https://www.theverge.com/tech/938635/google-polymarket-insider-trading-prediction-market-bets

·       Google Year in Search methodology: https://trends.withgoogle.com/year-in-search/data-methodology/

CFTC 2022 Polymarket enforcement release: https://www.cftc.gov/PressRoom/PressReleases/8478-22