Designing a cap table and ESOP to hold scientific talent for a decade

Consider a deep tech company in its fourth year. The lead physicist who architected its core qubit design is central to the work, and a significant technical result is close. Her initial equity grant, awarded when she joined at seed stage, has just fully vested.

At the same time, recruitment offers from large technology companies arrive, offering liquid compensation today. The company’s equity is still paper wealth, and her primary financial incentive to stay through the next and most demanding phase of R&D has just disappeared.

This is the problem sitting in the cap table of nearly every deep tech company. The standard equity model, a four-year vest with a one-year cliff, comes from a software-driven era. For a decade-long commercialisation timeline it is a poor fit.

Designing something better means thinking about patience, resilience and the rewarding of technical breakthroughs. What follows is a set of options rather than a prescription. Equity design is governed by company law, securities rules and tax treatment that vary by jurisdiction and change over time, so take every item below to your own lawyer and chartered accountant before you adopt it. Nothing here is legal or tax advice.

Why the four-year vest fits quantum poorly

The four-year vesting schedule was designed to incentivise employees through a rapid product-market-fit and exit cycle, where value is measured in user growth and revenue. In quantum, value is measured in coherence times, gate fidelities and algorithmic performance. That progress is not linear. It is the result of patient, cumulative R&D. A sprinter’s reward system applied to a marathon produces a vesting cliff at precisely the point where your most valuable talent becomes most poachable.

Four principles for a longer incentive horizon

A long-term employee stock option plan is a strategic question, not an administrative one. Four principles are worth considering.

1. An extended vesting horizon. For the first ten to fifteen key scientific hires, some companies use an eight or ten-year vesting schedule rather than four. If you do, it is worth communicating as a statement of reality rather than as a penalty: the ownership structure reflects the actual timeline over which value is created. A longer horizon also raises real questions about fairness and about what happens when someone leaves early, which is a conversation for your lawyer and for the employees themselves.

2. Milestone-based equity refreshers. Time-based vesting alone rewards presence rather than progress. One alternative is pre-defined equity refresh grants tied to critical technical milestones. For example, additional options vesting on demonstrating a two-qubit gate fidelity at a defined threshold, or on the successful demonstration of a fault-tolerant logical qubit. This turns the plan from a passive retention tool into an active incentive for research success. Performance-conditioned grants carry their own accounting and tax consequences, so design them with your accountant in the room.

3. Recognise your scientific co-founders. The first people who leave established institutions to join a high-risk venture are not ordinary employees, and their impact is foundational. Initial grants large enough to create a genuine sense of ownership help ensure they are committed for the whole journey rather than the first leg.

4. Think about liquidity. Illiquid equity is a real retention risk. An IPO may be years away, but there are mechanisms that reduce the pressure. Extended post-termination exercise periods are one, and windows of up to ten years have been reported at companies including Pinterest and Stripe. Another is creating opportunities for key early team members to sell a small portion of their vested equity during later-stage funding rounds. Both change the tax position for the employee, in ways that depend on jurisdiction and on the current law, and neither should be offered without professional advice.

A note on conversations with prospective hires: describe the mechanics of the plan, the number of options, the strike price and the vesting terms. Do not model what a stake might be worth in a successful future. You cannot know, and a number presented to a candidate reads as a promise.

Your team is the thing you are actually protecting

A patent portfolio is of little use without the people who can advance the technology it protects. A fabrication facility is inert without the team that runs it. The most durable advantage you can build is a unified, highly motivated team that is structurally and culturally aligned for the decade ahead, and the foundation of that alignment is your cap table.