The Employee Stock Option Pool: A Founder''s Guide to Sizing, Refreshing, and Protecting the Pool That Compounds Every Round
The option pool is the equity reserved for employee stock grants. It is one of the most consequential negotiation items in every round — and one of the least understood by first-time founders. The difference between creating a 15% pool pre-money versus post-money on a Series A can move founder ownership by 3–5 percentage points on a single round. Over three rounds, the accumulated impact can be double-digit percentages of the cap table.
The option pool (also called the equity incentive plan or ESOP) is a reserved block of common stock authorized for future issuance to employees, advisors, and consultants. It sits on the cap table as "authorized but not yet granted."
Authorized vs. granted. The pool is the authorized ceiling. Grants come out of the pool over time as hires are made. Ungranted pool sits fully diluted on the cap table but hasn''t been issued to anyone yet.
Common stock, not preferred. Options are for common stock. When exercised, employees hold common shares. This matters at exit because preferred converts or takes preference ahead of common.
The typical target pool sizes, expressed as % of fully diluted cap table after the round closes.
Note the pattern: the pool percentage tends to shrink over time in later rounds, because absolute dollar value per grant is much higher and the pool is measured in $ terms per hire rather than % of company.
The single most important pool mechanic. Every priced round involves a decision: is the option pool created pre-money (dilutes only existing shareholders — meaning founders) or post-money (dilutes everyone including new investors)?
The default in venture term sheets: pre-money. This means the founder eats the entire dilution of the pool creation. The new investors get their target ownership without absorbing any pool dilution.
Pool of 15% is created before the round. Founders diluted from 100% to 85%…
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