Google Loses Two Top AI Researchers in One Week, Stock Posts Worst Day in Over a Year
Alphabet shed roughly $250 billion in market cap on June 22 after Gemini co-lead Noam Shazeer defected to OpenAI and Nobel laureate John Jumper announced he was heading to Anthropic — all within seven days. The selloff, compounded by capex jitters, was GOOGL's worst single-day…
Alphabet (GOOGL) posted its worst single-day performance in over a year on June 22, triggered by the departure of two marquee AI researchers to rivals within the span of a week.
- Stock: Per Bloomberg, shares fell as much as 7.2% intraday — the largest intraday drop since February 2025; CNBC called it the worst single day in over a year
- Market cap: Multiple outlets estimated the single-day loss at roughly $250 billion
- Departure #1: Gemini co-lead Noam Shazeer joined OpenAI (announced June 18)
- Departure #2: DeepMind VP and Nobel laureate John Jumper announced he is joining Anthropic (announced over the weekend)
- Compounding factor: Investor unease over Alphabet's massive AI capex commitments and equity dilution
Alphabet (GOOGL) sold off sharply on June 22 in what CNBC described as the company's worst single-day performance in over a year.[CNBC] Bloomberg reported shares dropped as much as 7.2% intraday — the steepest intraday decline since February 2025.[Bloomberg] Multiple outlets estimated the market cap hit at roughly $250 billion for the day.
Two AI Stars Out in One Week
The selloff was set off by two high-profile exits in rapid succession, according to multiple reports:
- Noam Shazeer: Google VP of Engineering and co-lead of the Gemini large language model, and one of the co-authors of the landmark 2017 Transformer paper "Attention Is All You Need." He announced his move to OpenAI on June 18.[Bloomberg]
- John Jumper: VP at Google DeepMind and 2024 Nobel Prize in Chemistry laureate, recognized for leading development of the AlphaFold protein-structure prediction system. He announced over the weekend that he is leaving to join Anthropic.[Search Engine Journal]
Bloomberg reported that Google had brought Shazeer back into the fold in September 2024 by acquiring his startup Character.AI for roughly $2.7 billion — making his latest departure less than two years after that return.[CNBC]
Capex and Dilution Concerns Pile On
Beyond the talent exodus, investors have been scrutinizing the scale of Alphabet's AI spending. The company announced in early June plans to raise roughly $80 billion through an equity offering to fund AI infrastructure, with full-year 2026 AI capex projected in the $180–$190 billion range.[FX Leaders] Questions about returns on that investment and the dilutive effect of the equity raise have been a lingering concern for some investors.
Bloomberg noted that the back-to-back departures landed as broader market discussion around AI "commoditization" was heating up — a theme Microsoft (MSFT) CEO Satya Nadella had touched on in a Sunday interview.[Bloomberg]
Broader Market Context
U.S. equities broadly retreated on June 22, with the S&P 500 closing down roughly 0.37% at 7,472.79 and the Nasdaq Composite falling approximately 1.32% to 26,166.60. Alphabet was among the biggest laggards in large-cap tech for the session.[CNBC]
How the departures affect the timeline of Alphabet's various AI initiatives — and whether the company responds publicly — will be worth watching in the sessions ahead.
Sources
- CNBC — Alphabet has its worst day in over a year on AI concerns after high-profile exits
- Bloomberg — Alphabet Shares Drop After Second AI Star Departs for Rival
- Bloomberg — Star Google Researcher Jumps to OpenAI
- Search Engine Journal — Google Loses Two Top AI Researchers to OpenAI & Anthropic
- FX Leaders — GOOGL Stock Slides as AI Talent Exits, Capex Fears
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