OpenAI, Anthropic, and Databricks lead a new class of super-sized private companies eyeing public markets. The US IPO market has never seen a trillion-dollar debut. That may soon change as a wave of mega-valued private companies considers tapping public markets, which are eager for fresh stock. Behind the headlines about the potential Elon Musk IPO from the newly merged SpaceX and xAI is a class of potential mega-sized deals currently valued in the hundreds of billions, supported by a thriving