Polymarket resumes trading and vows to fully reimburse traders after a third-party provider compromise drained about $2.65 million

Trading returns, with repayment pledged

Polymarket’s international platform returned to trading at about 3 p.m. ET on Thursday, Oct. 29, 2026, following a third-party provider compromise that drained user funds, according to Unchained.

The company has promised to reimburse affected traders in full. That commitment accompanies the reopening, but the supplied reporting does not establish that repayments have been completed or give a timetable.

Loss estimates remain provisional

Unchained reported that outside estimates drawn from blockchain data placed the losses at about $2.2 million to $2.65 million. Polymarket had not disclosed its own loss total, making the approximately $2.65 million figure an estimate rather than a company-confirmed amount.

For traders, the available information separates two developments: trading access has been restored, while reimbursement remains a pledge. The supplied material does not identify the compromised provider or detail the measures taken before trading resumed.

What it means for prediction markets

• Access and repayment are distinct: The international platform’s reopening does not itself confirm that affected balances have been restored.
• The loss total is not final: The reported $2.2 million to $2.65 million range comes from outside blockchain-based estimates, not Polymarket’s own accounting.
• Provider security matters: The incident highlights third-party operational exposure alongside the event-outcome risks prediction-market participants take.