Jeff Dean, most recently the Chief Scientist at Google, has left the company after 27 years to co-found a new AI venture, Discovery Loop, an independent public benefit company that automates scientific engineering research using AI, with Google as its principal investor. The company announced his departure on Wednesday. Three other top Google executives, Sanjay Ghemawat, Oriol Vinyals and Quoc Le, have also departed to join Discovery Loop. Google's stock fell by over 3% in Wednesday's trade at the NYSE. Jeff Dean has spent over 30 years in Computer Science research and engineering. Unverified reports estimate that Dean earned up to $1 million annually as salary and bonuses from Google, with reports estimating his total annual compensation, including stock options, at around $30 million. Google's SEC filings indicate that executives like CFOs and CEOs made between $35 and $40 million in compensation annually. Varying reporting pitting Jeff Dean's net worth somewhere between $100 million and $1 billion, though no confirmed number exists for his assets or personal holdings. Records note that Jeff Dean is married and has children, but their details are not public.