According to the source, Reuters reports that OpenAI is preparing for a potential IPO targeting a valuation above $1 trillion, which Reuters says would place it among the largest public offerings in history (source: Reuters). For trading preparation, the key actionable catalyst would be an SEC registration filing and disclosed terms, which are required steps before a U.S. public listing (source: U.S. SEC). Until such filings appear, the report serves as a high-impact macro headline for AI markets rather than a defined trading timetable (source: Reuters, U.S. SEC).