Cap Tables and Dilution: What They Are, How to Read One, and How to Protect Your Ownership

Every time you raise money, you sell a piece of your company, and the record of who owns what is called the cap table. It sounds like an administrative document. It is actually the scoreboard of your entire fundraising journey, and the difference between founders who keep a meaningful stake and those who look up at an exit to find they own very little often comes down to how well they understood it.

This is the second post in the mechanics beneath the funding ladder, and the companion to our guide on startup valuation, the number that decides how much each round costs you here.

What a cap table actually is

A capitalisation table records every owner of your company and the size of their stake: the founders, the investors from each round, employees holding share options, and anyone holding a convertible instrument like a SAFE or note that will become shares later.

The version that matters is the fully diluted cap table. This counts not just the shares issued today, but every share that will exist once the entire employee option pool is granted and all convertible instruments convert. It is the true picture of ownership, and it is the version investors evaluate, because it shows what everyone will really own after the dust settles. A founder who only looks at today’s issued shares is reading the wrong number.

How dilution compounds

Dilution is simple in each round and brutal in aggregate. Sell 20 percent in a round and you keep 80 percent of what you had. Do that across several rounds and the percentages multiply, not add.

The data makes the pattern concrete. According to Carta’s founder ownership research, the median founding team retains about 56 percent of fully diluted equity after a seed round, roughly 36 percent after Series A, and around 23 percent after Series B. Median dilution per round runs about 19.5 percent at seed, 18 percent at Series A and 14 percent at Series B, per Carta’s 2025 data. The slice you give up each time is similar; the cumulative effect is what shrinks a founding team from owning everything to owning less than a quarter in three rounds.

This is not a failure. A smaller slice of a large, well-funded company is usually worth far more than all of a small one. But it is a reason to treat every round as a deliberate trade, not a reflex.

A worked example

Start with two founders owning 100 percent, then walk down the ladder.

• Seed: raise at a valuation that sells 20 percent, plus set aside a 10 percent option pool. Founders drop to roughly 70 percent.
• Series A: sell another 20 percent, and top up the pool by 5 percent. Founders drop to around 52 percent.
• Series B: sell 15 percent more. Founders land near 44 percent between them.

Every step looks reasonable on its own. Only the fully diluted table, modelled ahead of time, shows where the sequence lands. If you have not built that model before you raise, you are negotiating each round without knowing where it leaves you.

The option pool shuffle

One detail deserves special attention because it quietly transfers ownership from founders to investors: the option pool. Investors will require a pool of shares reserved for future employees, which is healthy. The question is when it is created. If the pool is expanded out of the pre-money valuation, as most term sheets require, all of that dilution falls on existing shareholders, mainly you, before the new money even arrives. A 15 percent pool taken from the pre-money cuts your effective valuation to about 85 percent of the headline. Negotiating the size and timing of the pool is one of the highest-leverage moves on any term sheet, precisely because it hides inside a number everyone treats as routine.

The levers you control

You cannot avoid dilution, but you are far from powerless over it. Four levers matter most.

1. Valuation. A higher, defensible valuation means selling less of the company for the same money. This is the biggest lever, within the limits of what you can honestly justify.
2. Round size. Raise what you need to reach the next milestone, not the largest amount on offer. Every extra dollar raised is extra ownership sold.
3. Option pool placement and size. Keep the pool right-sized rather than oversized, and push back on it coming entirely from the pre-money.
4. Number of rounds. Each round carries dilution and cost. Fewer, more decisive rounds usually preserve more ownership than a long string of small ones, which is also why capital efficiency compounds in your favour.

The African context

For African founders, two dynamics sharpen the stakes. First, because Series A and beyond are scarce on the continent, founders sometimes accept heavier early dilution out of fear that the next cheque may not come, which can leave them owning too little by the time they reach scale. Guarding ownership early matters more, not less, when later capital is uncertain. Second, cross-border structures are common: many African startups incorporate a holding company abroad to raise internationally, which adds a layer to the cap table and makes clean, well-modelled records and good legal advice essential. A messy cap table is one of the fastest ways to stall a deal in diligence anywhere, and doubly so across borders.

Model it before every raise

The single habit that protects founder ownership is unglamorous: build a fully diluted cap table and model what each prospective round does to it before you agree terms. It is the same discipline that experienced corporate finance practitioners apply to any transaction, seeing the whole picture before signing any part of it. Know where you own what, and you negotiate every round with clear eyes. Skip it, and the dilution that was invisible at signing becomes painfully visible at the exit. With valuation and the cap table understood, you have the mechanics beneath every rung of the funding ladder.