Alphabet Surpasses $4 Trillion Market Cap, Becoming Fourth Ever After Nvidia, Microsoft, and Apple

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Alphabet, the parent company of Google, has joined the $4 trillion market capitalization club for the first time in its history.

On January 12 (local time) at the New York Stock Exchange, Alphabet's share price rose by about 1% during intraday trading compared to the previous session, pushing its market capitalization above $4 trillion. This surge followed Apple's announcement that it had adopted Google's generative AI model "Gemini" for both its own artificial intelligence (AI) model and its next-generation AI assistant, Siri.

With this achievement, Alphabet has joined the ranks of companies that have surpassed a $4 trillion market capitalization, following Nvidia, Microsoft (MS), and Apple. Previously, Nvidia and Microsoft crossed the $4 trillion mark in July last year, and Apple did so in October of the same year. However, both Apple and Microsoft's market capitalizations have since fallen back below $4 trillion.

This milestone for Alphabet comes just after it wrapped up 2025 as one of Wall Street's top-performing stocks. Alphabet's share price soared by 65% last year alone, marking its steepest annual gain since 2009, when its stock price doubled in the aftermath of the global financial crisis.

The driving force behind this rally has been the success of Alphabet's AI strategy. Accelerating its recovery in AI competitiveness, Alphabet has emerged as one of the most closely watched stocks on Wall Street in 2025. At the end of last year, Google drew global attention in the AI market by unveiling its self-developed seventh-generation Tensor Processing Unit (TPU) "Ironwood" and its latest generative AI model "Gemini 3." Notably, Gemini 3 has been evaluated as outperforming OpenAI's ChatGPT, and Ironwood was used to train this model.

Thanks to this strengthened AI competitiveness, Alphabet surpassed Apple's market capitalization for the first time in seven years since 2019, on January 7.