Polymarket, a cryptocurrency-based prediction market platform, now lets retail investors bet on private company outcomes including valuations, IPO timing, and secondary market trades for firms like OpenAI and Anthropic.

The platform operates by allowing users to buy and sell shares in prediction contracts tied to specific corporate milestones. For example, traders can speculate on whether Anthropic will reach a $100 billion valuation by a certain date, or guess when OpenAI might go public. These contracts settle based on real-world outcomes, with winners profiting from accurate predictions.

This expansion opens private company speculation to ordinary investors who normally lack access to these bets. Traditionally, only venture capital firms, employees, and accredited investors could trade private company stakes through secondary markets like Forge or EquityZen. Polymarket removes those barriers by letting anyone with crypto holdings participate.

The platform operates in a legal gray area. The Commodity Futures Trading Commission has taken enforcement actions against Polymarket in the past, citing concerns over unregistered derivatives trading. However, Polymarket continues operating and recently settled with regulators while maintaining core functionality.

For investors, the appeal is straightforward. Crypto holders who believe OpenAI will IPO within 18 months can convert that conviction into profit. Those betting against Anthropic's valuation surge can short those markets. Unlike traditional equity crowdfunding platforms that restrict trading, Polymarket contracts trade continuously with real-time pricing.

The risks match the opportunity. Polymarket lacks the regulatory safeguards of traditional exchanges. Smart contract failures, platform insolvency, or disputed outcome determination could leave traders unable to access winnings. The platform's reliance on cryptocurrency also ties returns to crypto volatility.

OpenAI and Anthropic have not confirmed accuracy timelines for IPOs or valuations, making these predictions inherently speculative.