OpenAI Fires Employee Over Alleged Insider Trading on Polymarket and Kalshi

Multiple high-authority, high-relevance news outlets with direct reporting indicate that OpenAI confirmed it terminated an employee for alleged insider trading activity involving prediction markets Polymarket and Kalshi. TechCrunch and Wired, both credible sources, report similar facts: the employee used confidential information on these markets, and OpenAI acknowledged the termination. These accounts are consistent with each other, and Wired referenced details of the investigation. Other supporting sources (social media, forums) repeat or cite these primary news reports. Bloomberg commentary corroborates that insider trading occurred on Kalshi generally, though it is not specific to the OpenAI case; however, this does not contradict the main claim. No credible sources challenge or refute the reported events, and the overlap in facts between independent, reputable outlets strongly supports the truthfulness of the statement. While direct public evidence from OpenAI is limited to confirmations given to journalists rather than formal press releases, the consistent reporting from multiple reputable outlets makes the probability of truth high.