DOJ and CFTC charge Google engineer with Polymarket insider trading
On May 27, 2026, the Department of Justice and Commodity Futures Trading Commission brought coordinated criminal and civil charges against a Google engineer for insider trading on Polymarket. The dual enforcement action targets market manipulation by an individual trader using nonpublic information. It represents a federal effort to police prediction market platforms for fraud by platform users rather than the platform itself.
The Google engineer case is the second coordinated DOJ-CFTC action against a federal-affiliated insider in prediction markets this year, after the Van Dyke military case in April 2026. Polymarket, it means the platform itself escaped direct liability while a user faces prison time. That split puts pressure on rival Kalshi, which absorbed the Perez settlement and two trading bans on its own users.
Regulators now have templates for both criminal and civil tracks. Platforms without visible self-policing records look exposed to the next enforcement wave. The CFTC's repeat Friday-night filing pattern signals deliberate messaging. Each new case tightens the surveillance standard every venue must meet.
The DOJ-CFTC coordination follows a pattern of federal employee cases in prediction markets, including the Kalshi teleprompter-operator settlement that established civil liability for political advance-knowledge trades.