The Wall Street Journal reported that a cluster of Polymarket accounts won big on companies audited by KPMG. The findings follow an earlier Journal report that a KPMG employee is under investigation for alleged insider trading.

Raises questions about whether non-public audit information is leaking onto prediction markets, which could draw SEC or CFTC scrutiny of Polymarket's surveillance systems and trigger tighter information-barrier rules for auditors with access to material non-public data.