Trading volume on Polymarket’s US exchange rose about 266% from June to October 2026, from $4.04 billion to $14.77 billion, according to TickerTracker. The analytics platform counts trades at the contracts’ full payout value. Combo contracts made up $8.6 billion, or 58.2%, of October volume.
The growth came as Polymarket faced legal and regulatory scrutiny. New York’s attorney general sued the company in September, alleging that its sports-related contracts violated state gambling laws; the dispute centers on whether federal commodities rules or state gambling laws govern such contracts. Polymarket also told CNBC that its annualized revenue had topped $1.8 billion, up from more than $1 billion in June.
