NVIDIA's sustained dominance in AI semiconductors continues to anchor trader consensus for the largest company by market capitalization at the end of December 2026, with its 66.5% implied probability reflecting record market-cap levels above $5 trillion amid accelerating GPU demand. Recent quarterly results and forward guidance from NVIDIA have reinforced this positioning, while Alphabet's 21% odds stem from its strong cloud revenue growth exceeding 60% year-over-year and expanded 2026 capital expenditures approaching $190 billion to scale AI infrastructure. Apple, at 7.0%, trails due to slower growth in services and hardware segments relative to AI peers. Key upcoming catalysts include NVIDIA's May earnings and broader sector data on semiconductor orders, which could further clarify the path for these valuations through year-end.