Polymarket Halted International Trading After Hackers Drained Accounts

A third-party vendor based in the United Kingdom was breached, not the prediction market’s website itself. Law enforcement in the UK have been notified of the incident, the company said. Trading was initially paused while the company investigated for several hours.

On X, prominent traders complained that they had lost money; Blockchain analytics firm Bubblemaps reported that around 700 users appear affected, with approximately $2.7 million stolen. Polymarket declined to comment when WIRED asked how many traders were impacted by the breach and how much money was lost, but said it will refund impacted traders.

The hack did not impact users on Polymarket US, the company’s newer platform for people within the United States.