The claim is confirmed by an official joint press release on BusinessWire ('Polymarket Launches Prediction Markets on Private Companies Powered by Nasdaq Private Market Data'), which details an exclusive agreement between Polymarket and Nasdaq Private Market (NPM). NPM serves as the resolution data provider for contracts covering valuation milestones, IPO timing, and secondary market activity — exactly as the claim describes. CoinDesk and The Block independently corroborate all key details, including specific company names (OpenAI, Anthropic, Stripe, SpaceX) and the $5 trillion private market framing. The only minor precision note is that the partner is 'Nasdaq Private Market,' a specialized subsidiary, rather than Nasdaq the exchange — but this is standard shorthand and does not materially misrepresent the claim. All sources are consistent and there is no conflicting evidence.