According to CNBC, Polymarket said its annualized revenue has exceeded $1.8 billion, up from a revenue run rate of more than $1 billion disclosed in June, after the launch of its domestic exchange in May. The U.S. exchange recorded more than $14.5 billion in notional volume in October, compared with $4 billion in June, according to TickerTracker. Combo event contracts accounted for more than 70% of platform volume on Sunday. Polymarket has begun a new $1 billion funding round that values the company at $21 billion. The Commodity Futures Trading Commission is investigating the company, including its advertising practices and whether it violated a settlement barring U.S. residents from using its international exchange. A Polymarket spokesperson said the company would work with lawmakers and welcomed scrutiny.