Alphabet’s stock fell 5% on June 22, 2026, marking its worst day in over a year, as the company lost two of its most prominent artificial intelligence researchers to rival firms in consecutive days. The talent exodus comes as a rare joint warning from Five Eyes cybersecurity agencies signals that AI-powered cyber threats could overwhelm current defenses within months.
Google’s vice president of engineering and Gemini AI co-lead Noam Shazeer announced on June 18 that he was leaving for OpenAI. “I’m excited to share that I’ll be joining OpenAI and look forward to working with the exceptional team there,” Shazeer said in a post on X, adding that the decision to depart was difficult.
Shazeer’s departure came less than two years after Google brought him back to its DeepMind unit in August 2024 as part of a partnership with Character.AI, the startup he co-founded after leaving Google in 2021. The company had paid $2.7 billion to acquire his team at Character.AI.
Two days later, on June 19, John Jumper, DeepMind’s vice president and engineering fellow, announced he was leaving after nine years to join Anthropic. Jumper, who won the 2024 Nobel Prize in Chemistry alongside Google’s Demis Hassabis for AlphaFold, is best known as co-creator of the breakthrough AI that has predicted more than 200 million protein structures, cutting years off biological and medical research.
The consecutive exits underscore intense competition for top AI talent among technology companies. Bloomberg reported that Jumper had been a key member of Google’s AI coding development team, and his departure strains the company’s efforts to compete with Anthropic and OpenAI.
Alphabet has been spending heavily on artificial intelligence infrastructure, raising $141 billion in debt and equity since October 2025 and raising its 2026 capital expenditure guidance to $180 billion to $190 billion. Investors have questioned whether such massive spending will generate returns if AI models become cheaper and more interchangeable, as Microsoft CEO Satya Nadella suggested in a recent interview.
Five Eyes Issues Urgent Cybersecurity Warning
On the same day Alphabet’s stock tumbled, cybersecurity agencies from the United States, United Kingdom, Canada, Australia, and New Zealand issued a rare joint statement warning that artificial intelligence is fundamentally transforming both offensive and defensive cyber capabilities. “Frontier AI models are anticipated to exceed current industry expectations. The timeline is not years, it is months,” the statement said.
The Five Eyes agencies—including the U.S. Cybersecurity and Infrastructure Security Agency (CISA), the UK National Cybersecurity Centre, and their counterparts—warned that AI is shrinking the time between the discovery of a vulnerability and its exploitation by malicious actors. The statement called for organizations to prioritize foundational cybersecurity practices, reduce attack surface, accelerate patching, and strengthen identity and access controls.
The Canadian Centre for Cyber Security told CSO Online that the statement was issued “because we are seeing real, recent shifts in how AI tools are being used, including to speed up the discovery and exploitation of vulnerabilities. As these capabilities become more accessible, the risk is no longer theoretical.”
The Five Eyes agencies urged businesses and government leaders to treat cyber risk as a core business issue rather than a purely technical one. “Boards and executives should ensure cyber resilience is in place and works under pressure,” the statement said, noting that organizations must be prepared to face new zero-day vulnerabilities.
However, some cybersecurity experts criticized the guidance as too generic. Joseph Steinberg, a US-based cybersecurity and AI advisor, said the statement “seems to be a generic statement that states the obvious, and, quite frankly, does not provide meaningful guidance about addressing AI risks.” He noted that the statement did not adequately discuss AI’s transformation of social engineering or its ability to perform reconnaissance, nor did it address the risks of data leakage when AI systems are trained on poisoned data.
Sources
- CNBC — Alphabet’s 5% stock decline on June 22, 2026, the worst day in over a year; details on Noam Shazeer’s departure to OpenAI and John Jumper’s departure to Anthropic
- Reuters — John Jumper’s announcement of departure from Google DeepMind to Anthropic on June 19, 2026
- Axios — Noam Shazeer’s departure from Google to OpenAI and his prior work at Character.AI
- CSO Online — Five Eyes joint statement on AI cybersecurity threats issued June 22, 2026; details on the timeline of threat acceleration and expert commentary
- Financial Times — Five Eyes warning that AI-powered threats may succeed within months
- SMH.com.au — Five Eyes cybersecurity agencies joint statement warning on AI threat
