Intercontinental Exchange (ICE), the company that owns the New York Stock Exchange, has added another $600 million to its stake in prediction market platform Polymarket. Combined with its $1 billion investment from October, ICE's total commitment now stands at close to $2 billion — one of the largest institutional bets ever placed on a crypto-native platform.

ICE also announced plans to acquire up to $40 million in additional shares from existing Polymarket holders.

The news comes as Polymarket's closest rival, Kalshi, recently raised more than $1 billion at a $22 billion valuation and is already generating an estimated $1.5 billion in annual revenue. The two platforms operate differently — Polymarket runs on-chain via a smart contract layer, while Kalshi operates as a CFTC-regulated exchange — but both are riding the same wave of institutional and retail demand for event-based trading.

Prediction markets have expanded well beyond their political roots. Users now trade on outcomes spanning economic data releases, sports results, and tech milestones. Major retail platforms including Coinbase, Kraken, and Robinhood have all added event contract products in recent months.

Regulatory Pressure Building

ICE's deepening commitment arrives under scrutiny. Lawmakers have raised concerns about whether prediction markets are vulnerable to manipulation or insider information. In response, Polymarket has acquired a licensed exchange and clearinghouse and announced a partnership with Palantir and TWG AI to build a surveillance system designed to detect suspicious trading in its sports markets.

The backing from one of the world's most recognized financial market operators signals something more than capital. It positions Polymarket alongside mainstream financial infrastructure at a moment when the legitimacy of prediction markets is still actively debated in Congress.

If prediction markets secure broader regulatory approval, ICE's position would give Polymarket a significant advantage in institutional access.