Of Google DeepMind's roster of its approximately 15 most senior research and engineering leaders as of today, August 5, 2026 (i.e., the leadership in place immediately after today's announced reorganization and the departure of Jeff Dean, Sanjay Ghemawat, Oriol Vinyals, and Quoc Le to found Discovery Loop), how many of those ~15 individuals will have left Alphabet entirely by February 5, 2027?

rationale:

Recent Shock and Baseline Attrition Today’s major reorganization—moving Demis Hassabis to Alphabet Chief Scientist and elevating Koray Kavukcuoglu to SVP, while Jeff Dean, Sanjay Ghemawat, Oriol Vinyals, and Quoc Le exit to found Discovery Loop 44 sources—follows an exceptionally turbulent period for Google DeepMind. Over the preceding months, top-tier talent has fled at a historically extreme rate, including Noam Shazeer to OpenAI 2 sources and Nobel laureate John Jumper to Anthropic 2 sources. This "giant sucking sound" of talent fortune.com establishes a high baseline hazard for the remaining senior leadership team.

Stabilizing Factors and Roster Stickiness However, the surviving ~15-person roster (which excludes the highly flight-prone leaders who just left) is arguably selected for institutional stickiness. Kavukcuoglu and his closest reports are effectively reorg winners, making near-term departures unlikely 9to5google.com. Google also deploys aggressive retention machinery, including off-cycle equity pools, special packages, and strict 6–12 month non-competes and paid garden leave for senior UK researchers digidai.github.io. Importantly, the resolution criteria are strict: an individual must officially cease to be an Alphabet employee by February 5, 2027. Lengthy garden leaves (such as Jumper's reported one-year period businessinsider.com) or internal reshuffles to entities like Isomorphic Labs pymnts.com will mechanically suppress the count of official exits.

Ongoing Risks and Correlated Exits Despite these buffers, the 6-month exit hazard remains well above normal. Unrelenting poaching from OpenAI, Anthropic, and Meta techtimes.com is compounded by internal frustration over the delay of the flagship Gemini 4 model past its June 2026 launch target uk.finance.yahoo.com. Furthermore, Discovery Loop is likely to act as a powerful magnet for former colleagues, particularly those disillusioned by perceived bureaucratic sclerosis or the shift away from long-horizon science toward commercialization 2 sources. Departures at this level rarely happen in isolation; they tend to trigger cascading lift-outs.

Synthesis Balancing the acute recent attrition rate against robust retention measures and a newly stabilized post-reorg leadership team, an expected value of roughly 1.5 to 2.0 exits is highly plausible. The distribution is centered on a median of 2 departures. There is a meaningful chance (10%) of exactly 0 confirmed exits if garden leave clauses successfully delay official termination dates past the six-month window. However, a fat right tail extending out to 5 accounts for the risk of a correlated second wave of departures if Gemini 4 falters further or a well-funded rival executes a targeted mass acqui-hire.