Alphabet (GOOG.O) shares fell on Monday after DeepMind vice president John Jumper said over the weekend he will leave to join Anthropic, sending the stock down as much as 7.2% intraday — its largest intraday drop since February. The move follows last week’s departure of senior researcher Noam Shazeer to OpenAI, and comes amid broad weakness in large-cap tech names. Jumper, a core member of Google's AI programming team, received the 2024 Nobel Prize in Chemistry for AI-related research.