Alphabet Shares Slide As Top AI Talent Departs For Rivals

Alphabet suffered a sharp market setback after two prominent artificial intelligence researchers left the company for competing AI firms, fuelling concerns among investors that Google may be struggling to retain key talent in one of the technology industry’s most competitive sectors.

Shares in Google’s parent company fell by as much as 7 per cent during trading, putting hundreds of billions of dollars in market value at risk as investors reacted to the high-profile departures.

Among those leaving is Nobel Prize-winning researcher John Jumper, who announced he was departing Google’s DeepMind division to join AI start-up Anthropic. The move followed the recent exit of Noam Shazeer, one of the leaders behind Google’s Gemini AI models, who has reportedly taken a position at OpenAI.

John Jumper

The departures have intensified debate over the battle for elite AI researchers, with major technology companies investing heavily to attract and retain specialists capable of developing next-generation models.

Gil Lauria, Head of Technology Research at DA Davidson, said the exits are likely to raise questions about Google’s position in the rapidly evolving AI landscape.

“Google had the state-of-the-art model for a few weeks last year which helped it get credit as an AI winner but has fallen off since, and these departures may mean it is falling behind,” Lauria said.

The decline in Alphabet’s share price outpaced losses recorded by several of its technology rivals. Meta also traded lower, while Amazon experienced a separate decline as broader concerns around AI spending continued to weigh on investor sentiment.

Market analysts remain focused on the enormous sums being invested into artificial intelligence infrastructure. Alphabet has previously indicated it expects to spend between US$180 billion and US$190 billion during fiscal 2026, with a significant portion allocated to AI computing resources and data centre expansion.

Some investors are becoming increasingly cautious about whether these investments will generate returns quickly enough to justify the costs.

Dave Wagner of Aptus Capital Advisors said markets are drawing a distinction between companies spending heavily on AI and those already generating meaningful revenue from the technology.

“Simply said, the market is drawing a sharp line between AI spenders and AI earners,” Wagner said.

He added that while technology giants face pressure on profit margins due to large-scale AI investments, suppliers of memory chips and related hardware continue to benefit from surging demand.

The technology sector also faced additional pressure following comments from Microsoft Chief Executive Satya Nadella, who outlined a vision for broader access to lower-cost AI models. Nadella suggested businesses and economies should avoid becoming overly dependent on a small number of dominant AI systems.

Microsoft has been expanding its AI offerings through products such as Copilot Cowork, which aims to provide customers with access to a wider range of AI tools and models.

At the same time, competition is increasing from Chinese AI developers including DeepSeek and z.AI. Their open-source models have attracted attention for delivering capabilities that rival leading American systems while often operating at significantly lower costs.

With competition intensifying across both talent and technology, investors are closely watching whether Google can maintain its position among the leaders of the global AI race.