NVIDIA leads trader sentiment for the largest company by market capitalization at the end of September 2026, with its 61% implied probability reflecting sustained artificial intelligence demand for its GPUs and data center solutions. Recent developments show Apple briefly overtaking NVIDIA in late July 2026 amid concerns over AI capital expenditures, pushing Apple's market cap near $4.9 trillion while NVIDIA slipped toward $4.7–4.8 trillion. However, NVIDIA's competitive edge in large language model training hardware and ecosystem momentum continue to support expectations of a rebound by quarter-end. Lower probabilities for Apple (27.5%), Microsoft (2.0%), and others highlight the market's view that AI-driven growth will likely reassert NVIDIA's lead before the resolution date, though product timelines and earnings reports remain key swing factors.