Alphabet Stock Falls 7% as Two Top AI Researchers Exit to Rivals

Alphabet shares fell as much as 7% on Monday following the departure of two prominent AI researchers to competing firms within days of each other, marking what could be the stock's steepest single-session decline in more than a year.

Noam Shazeer, who served as vice president of engineering and co-led development of Google's Gemini AI models, announced last week he would join OpenAI. Shazeer had only returned to Google in August 2024 as part of a partnership deal with Character.AI, the startup he co-founded with Daniel De Freitas after leaving Google in 2021, according to CNBC.

The second departure came Friday when John Jumper revealed he was leaving Google DeepMind for Anthropic after nine years with the company. Jumper, who won the 2024 Nobel Prize alongside DeepMind chief Demis Hassabis, led development of AlphaFold, an AI system that has predicted structures for more than 200 million proteins and accelerated biological and medical research. Alphabet confirmed his exit, and Anthropic confirmed his hiring.

Why it matters

The rapid succession of high-profile departures signals potential vulnerability in Google's position as an AI leader at a moment when the company is making massive infrastructure investments. With $141 billion raised in debt and equity since October to build AI capabilities, losing architects of flagship projects like Gemini and AlphaFold to direct competitors raises questions about whether financial resources alone can secure talent at the cutting edge of AI development.

Analyst concerns about talent retention

Wedbush Securities analyst Dan Ives characterized Jumper's departure bluntly: "Losing John is a big loss for Google and there is no way to sugarcoat it."

D.A. Davidson analyst Gil Luria said the back-to-back exits were prompting broader questions about Google's competitive position. "The departures of Noam Shazeer to OpenAI and John Jumper to Anthropic within a couple of days are raising the concern that Google is losing the war for talent at the frontier of AI," Luria said.

Additional pressure came from a Wall Street Journal interview published Sunday in which Microsoft CEO Satya Nadella argued that dependence on dominant AI providers should decrease and described the AI market as increasingly commoditized.

Market impact

Alphabet shares traded around $346.30 by Monday's session, down roughly 5.9%. The stock has declined approximately 9% during June, though it maintains a gain of about 11% year-to-date.

In a statement to Barron's, Alphabet said: "We are grateful for John's significant contributions to Google DeepMind's work in advancing science and AI. We wish him well in his next chapter."

These details were first reported by Quartz.