Polymarket told CNBC that annualized revenue exceeded $1.8 billion, up from more than $1 billion in June, as monthly trading volume on its U.S. exchange rose 266% to $14.77 billion in October from $4.04 billion in June. TickerTracker counts contracts at their full payout value. Combo contracts accounted for $8.6 billion, or 58.2%, of October volume, while sports contracts generated $4.57 billion, or 31%. Sports activity accelerated around the FIFA World Cup, with soccer volume reaching $1.81 billion in June from $85.4 million in May. Election-related contracts also rose to $108.2 million during the first 10 days of November from $16.6 million in September, although they represented 2.2% of November volume. The U.S. arm expanded access in May after Polymarket began admitting American traders to a separate exchange in late 2025, three years after a CFTC settlement led it to block U.S. trading on its international platform. The company is pursuing a $1 billion funding round at a reported $21 billion post-money valuation, while facing CFTC scrutiny, allegations involving promotional content, and state lawsuits over whether sports contracts require gambling licenses.