Polymarket

Polymarket runs a prediction market exchange where users trade shares tied to real-world outcomes. It was launched in 2020 and trades via a central limit order book using USDC on Polygon. It earns money mainly from trading fees. In 2025 it paid $112M for CFTC-licensed exchange and clearinghouse QCEX and relaunched in the US. ICE, the parent of the NYSE, invested in it at about a $9B valuation in October 2025. In August–September 2026 it reportedly raised about $1B at a $21B valuation in a round led by 1789 Capital. Reported total funding is roughly $3.3–3.9B, depending on the source.