Alphabet Hits $4 Trillion Valuation as AI Deals and Cloud Growth Fuel Rally
Alphabet Inc. briefly joined the $4 trillion market cap club on Monday, becoming the fourth U.S. company to reach the milestone after Nvidia, Microsoft, and Apple. The Google parent's stock surged 65% in 2025, outpacing other Magnificent Seven peers.
The rally comes as Alphabet secures landmark AI partnerships, including a multi-year deal to power Apple's next-generation Siri with Gemini AI models. Google Cloud revenue jumped 34% in Q3, with $155 billion in backlogged contracts signaling sustained enterprise demand.
Custom AI chips are emerging as a new growth vector, with Meta Platforms reportedly in talks to spend billions on Alphabet's tensor processing units starting in 2027. The stock closed at $331.86 after touching an intraday high of $334.04.