Alphabet, the technology company that owns Google, has become the world's fourth company to reach a $4 trillion market valuation.
On Monday, Alphabet shares rose 1% after Apple announced it would use Google's AI, Gemini, as the foundation to develop the next version of Siri. This pushed Alphabet's stock to close at $331.86 per share, driving its market value to $4 trillion.
Google's parent company joined the $4 trillion club following three major tech giants that had previously reached this milestone: Nvidia and Microsoft in July 2025, and Apple in October of the same year.
However, Microsoft and Apple's valuations have since declined, while Nvidia has maintained its valuation and remains the highest-valued company globally, according to market data.Companies Market Cap
Alphabet's entry into the $4 trillion group is also due to its strong performance in 2025, ending the year with shares up over 65%, making it one of Wall Street's best-performing stocks.
Alphabet's resurgence is linked to clear AI policies and the launch of Ironwood, the company's new TPU chip, seen as having the potential to compete with Nvidia. Additionally, the December release of Gemini 3 received highly positive feedback.
Analysts at Citi have named Google a leading internet stock to watch throughout 2026, noting that 70% of Google Cloud customers use the company’s AI products. Google also has the chips, infrastructure, and models ready to meet market demand.
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