🧠 Food for thought

Implications, context, and why it matters.

WSJ report on disputed $1.5 billion Meta offer raises retention questions at Thinking Machines Lab

• Andrew Tulloch, a co-founder and AI researcher at Thinking Machines Lab led by former OpenAI CTO Mira Murati, is leaving for Meta. The startup cited personal reasons. Months earlier, WSJ said Mark Zuckerberg tried to recruit him with pay up to $1.5 billion over at least six years. Meta called that description “inaccurate and ridiculous.” No public evidence exists on the lab’s equity vesting or retention terms.
• Many AI startups use multi-year vesting schedules (time based ownership of equity) with acceleration clauses (faster vesting if specified events occur) to reduce early co-founder exits.
• The lab cited personal reasons for Tulloch’s exit. No visibility into internal agreements, so any link to outside recruiting is speculation.

AI startups should audit co-founder equity lock-ups before fundraising

• Early stage founders face billion dollar offers that can pull core technical talent before a defensible market position exists.
• Use four year vesting with one year cliffs (no equity vests until month 12, then vests on a schedule) tied to acquisitions. Add double trigger acceleration where unvested equity speeds up only with both a change of control and a termination or a material role reduction. Apply the same rules to all co-founders and yourself, not just to employees.
• Venture investors and corporate acquirers should verify that the founding group has binding retention terms. Equity lock-ups are contractual limits on when and how founders can sell shares to reinforce retention.