Sources: Polymarket considers an offer valuing it at ~$9B, up from $1B in the summer; Kalshi is close to raising money at a $5B valuation, up from $2B in June The Information : The Information 2025-09-13 Kalshi Related Coverage Betting site Polymarket is about to cash in on a US expansion with a blockbuster new funding round Business Insider Polymarket Weighs $9B Valuation Amid User Surge and CFTC Approval: The Information CoinDesk Polymarket weighs financing at $9-10B valuation while Kalshi is close to raising at $5B valuation: reports The Block Polymarket eyes $10B valuation as prediction market preps US comeback: Report Cointelegraph Double scoop! Investors are betting big on betting markets. Kalshi is finalizing a $5B valuation round while Polymarket is considering a term sheet that would raise its valuation to $9 billion! … Katie Roof