Chipmaker Nvidia became the first public company to top $4 trillion in value on Wednesday after two-year investor frenzy. Nvidia shares rose 2.5% or $3.97 in early trading Wednesday topping $164 each. At the beginning of 2023 Nvidia shares were around $14 each. Nvidia Share Price Surge The poster child of the AI boom Nvidia has grown into the largest company on Wall Street surpassing Microsoft Apple Amazon and Google. It is now worth over $3 trillion and the stocks movement carries more weight on the S&P 500 and other indexes than every company except Apple. Nvidia and other companies benefiting from the AI boom have been a major reason the S&P 500 has climbed to record after record recently with the latest coming last week. Their explosion of profits has helped to propel the market despite worries about stubbornly high inflation and possible pain coming for the US economy from tariffs and other policies of President Donald Trump. Microsoft  2nd Valuable U.S. Company Microsoft has become the second-most valuable U.S. company reaching a market valuation of $3.75 trillion after its shares rose by 1.3% in the latest trading session. Meanwhile Nvidia has staged an impressive rebound with its stock surging nearly 74% since hitting a low in April. The recovery follows earlier concerns over global tensions and a tariff dispute tied to former U.S. President Donald Trump.