Shares of Google parent Alphabet (GOOGL) fell about 5% on June 22, erasing roughly $225 billion in market value in a single day. The trigger was reporting that two of the company's leading AI researchers had departed for rivals in quick succession.
June 22 · Alphabet
Two Star AI Researchers Walk Out — and $225B Walks With Them
Back-to-back exits of Gemini co-lead Noam Shazeer (to OpenAI) and AlphaFold's Nobel laureate John Jumper (to Anthropic) sent Alphabet shares down as much as 7.2% in a single day — its worst drop in over a year.
-7.2%
Intraday max drop in Alphabet shares
-5%
Close-based decline — biggest in over a year
$225B
Market value wiped out in the selloff
Market value lost vs. the cost to bring Shazeer back
Both figures in $ billions — drawn to the same scale
$225B
Market cap lost in one day
$2.7B
2024 Character.AI deal for Shazeer's team
Talent risk is now being priced into the stock — one day's loss dwarfs the price once paid to acquire that talent.
Google → OpenAI
Noam Shazeer
Gemini co-lead · co-author of "Attention Is All You Need" · rejoined in 2024 via the ~$2.7B Character.AI deal.
DeepMind → Anthropic
John Jumper
AlphaFold lead · 2024 Nobel Prize in Chemistry · departing after 9 years at the lab.
The bull case
Search and YouTube revenue can sustain heavy AI investment
Selloff framed by Morningstar as a buying opportunity
DeepMind's research bench described as far larger than rivals'
The concern
Talent flight to OpenAI, Anthropic and Microsoft through 2025–26
Criticism of bureaucracy and concentrated compute allocation
Cloud executives also reported leaving for rivals
The open question: can Google retain talent across both frontier models and scientific AI?
Rivals offer higher pay and more research freedom. The market is now watching whether Alphabet can keep the pace and reliability of its roadmap intact.
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