SpaceX's completed June 2026 IPO at a $1.77 trillion valuation, with shares closing above $160 on the first day for a roughly $2.1 trillion market cap, anchors trader consensus at 57.5% implied probability as the year's largest by that metric. Anthropic's late-October S-1 filing and planned November Nasdaq debut under ticker ANT, targeting up to $100 billion in proceeds at $1.5–2 trillion valuations amid 1,300% first-half revenue growth, keep its odds close at 43.1%. Integration of xAI into SpaceX further bolsters the leader's positioning, while a cooling IPO environment marked by elevated Treasury yields and selective AI demand limits upside for later candidates such as OpenAI.