Kalshi and Polymarket have recently identified more than 140 user accounts suspected of leveraging non-public information. The two prediction market platforms announced the findings as part of their ongoing integrity monitoring procedures.
Market Integrity Measures
The two platforms manage large volumes of daily trades across multiple event categories. Identifying accounts with potential access to restricted data allows operators to isolate irregular trading behavior before it affects broader market pricing. Each flagged profile is now subject to a detailed audit of its transaction history and disclosure records.Maintaining fair information access remains a core requirement for prediction market stability. Participants who trade on material facts not yet shared with the general user base can create pricing distortions across related contracts. The platforms have stated that trading restrictions will remain in place for the reviewed accounts until the verification process is complete.