Alphabet shares rose nearly 1% in early premarket trading on Thursday after sliding nearly 4% on Wednesday following a leadership reshuffle that wiped over $185 billion from Alphabet's market capitalization. Nobel Prize-winning computer scientist Demis Hassabis is stepping back from day-to-day leadership of DeepMind, Google's primary AI research laboratory, and has been appointed Alphabet chief scientist and DeepMind chair, with Koray Kavukcuoglu taking over as DeepMind's operational lead and becoming a senior vice president at Google DeepMind. CEO Sundar Pichai wrote on X, "I can't imagine a better person than Demis to do it. He'll stay closely connected to Koray and the GDM teams." The reshuffle coincides with Chief Scientist Jeff Dean, a 27-year Google veteran, leaving alongside several colleagues to found Discovery Loop, a public benefit corporation focused on accelerating discoveries in machine learning, science, and engineering, with Google participating as a founding investor and cloud partner. Previously, Noam Shazeer, co-author of a 2017 paper on transformer architecture, and John Jumper, who shared in the AlphaFold Nobel Prize in 2024, left in recent months for OpenAI and Anthropic. Investor patience had been stretched thin two weeks ago, with Google's shares falling 7% after the company pledged to step up AI spending but stopped short of providing a timeline for its next model launch. Google's Gemini 3.5 Pro model is reportedly delayed.