Google’s parent company, Alphabet, has become the fourth firm to join the $4 trillion market value club.

Alphabet’s shares rose about 1 per cent on Monday after Apple announced it had selected Google’s Gemini as the foundation for its artificial intelligence models and the next generation of Siri.

The search giant now joins Nvidia, Microsoft and Apple as the only companies to have reached the $4 trillion valuation milestone.

Nvidia and Microsoft first crossed the $4 trillion mark in July, while Apple followed in October.

However, both Apple and Microsoft have since fallen back below the $4 trillion threshold.

The search giant has gained momentum after assembling the building blocks of an AI resurgence and navigating major regulatory challenges last year.

In November, it unveiled Ironwood, its seventh-generation tensor processing unit, a custom AI chip seen as a credible alternative to Nvidia’s products.

A month later, Google rolled out Gemini 3 to widespread acclaim.
Even as OpenAI’s ChatGPT and Sora attract growing consumer attention, and worries mount over the future of online advertising in an era of AI chatbots and agents, Alphabet has largely dispelled concerns that its most innovative years are behind it.