Reading a cap table without crying: dilution, options, and the math that decides who owns what
The cap table is the single source of truth for ownership — and the place where dilution quietly compounds. How to read one, and the three numbers that matter at every round.
Every ownership dispute, every surprise at exit, and every "wait, I own how little?" moment traces back to a cap table someone did not read carefully. The document itself is simple — a list of who owns which securities — but the dynamics are not.
#Fully diluted or nothing
Ownership percentages mean nothing unless calculated on a fully diluted basis: all shares outstanding, plus the entire option pool (granted or not), plus everything that converts — SAFEs, notes, warrants. A founder who owns 40% of issued shares may own 31% fully diluted. Investors always negotiate on the fully diluted number; founders should too.
#The option pool shuffle
Investors typically require the option pool to be topped up before their money comes in — "pre-money" — which means the dilution lands entirely on existing shareholders. A 10% pool expansion inside a Series A term sheet effectively lowers the price per share. It is the most common quiet negotiation lever in venture, and most first-time founders never notice it.
#Dilution compounds
Each round typically sells 15–25% of the company, plus pool expansions. Run the compounding: a founding team that starts at 100% commonly sits at 50–60% after seed and Series A, and under 40% by Series B. That is not failure — a smaller slice of something enormous beats all of nothing — but it should be a choice, made with open eyes.
The cap table never lies. It just waits for you to read it.
The three numbers to track at every round: your fully diluted percentage, the post-money valuation, and the total liquidation preference ahead of common. Those three, together, are what your equity is actually worth.