Prediction market platform Polymarket closed a $1 billion funding round at a $21 billion valuation, according to Bloomberg Law, with 1789 Capital leading the investment.

The raise marks the third major capital injection into the platform since October 2025, following earlier rounds in April 2026. Polymarket has grown into one of the largest real-money prediction markets available to U.S. traders, competing with platforms like Kalshi in the space of event-based derivatives that operate in legal gray areas pending regulatory clarity.

1789 Capital, the investment firm behind the round, is known for backing financial infrastructure and alternative asset platforms. The valuation places Polymarket among the most expensive venture-backed crypto platforms outside of Layer 1 blockchain networks, a category typically occupied by centralized exchanges and custody providers.

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Polymarket operates as a decentralized protocol running on Polygon, allowing users to trade contracts tied to real-world events from elections to weather outcomes to commodity prices. The platform has drawn significant trading volume and user growth, though it faces ongoing scrutiny from the U.S. Commodity Futures Trading Commission over whether its structure complies with derivatives regulations. The CFTC has not taken enforcement action against the platform but has raised concerns about prediction markets operating without proper registration.

The platform's previous funding rounds valued it at lower multiples. Polymarket's growth follows a broader wave of venture capital interest in on-chain trading venues and event derivatives, categories that regulators have identified as potential areas requiring new rules.

Polymarket's valuation now exceeds many established cryptocurrency trading platforms. The $21 billion figure values the business at a significant multiple of its current revenue, typical for early-stage infrastructure plays in the crypto sector.