Alphabet shares fell 4.03 per cent on 5 August as Jeff Dean left Google after 27 years alongside three senior AI researchers to launch Discovery Loop, a new artificial intelligence venture. The decline wiped roughly $186 billion (£138 billion) from Alphabet's market value, although the sell-off coincided with a wider reshuffle of Google's AI leadership and should not be attributed solely to the departures.
Legendary coder Jeff Dean is leaving Google. His new team is Discovery Loop, a startup focused on leveraging AI for science and engineering. And he’s bringing three other former Google sluggers along for the ride. https://t.co/IdN9UlvErW pic.twitter.com/JLpZonPg0v
— HPCwire (@HPCwire) August 20, 2026