What Is a Capitalization/Cap Table?

Clarity over convention

The Sibyl Un-Glossary

Some terms have been defined in many places, yet misinterpretations of them keep appearing in decks. At Sibyl, we’re doing the un-glossary instead: starting with what a term is often mistaken for, then working toward what it actually means. We hope it helps.

A cap table can look deceptively simple: names, shares, percentages. But those percentages only make sense once you understand what is included in the denominator, what may convert into shares later, and what rights sit behind each line. A founder who reads the cap table as a static ownership list can walk into a financing believing they own more than they do, accepting a “better” valuation that leaves them worse off, or assuming their percentage tells them exactly what they will receive in an exit.

1. The percentage is only as good as the denominator

Owning 70% of the shares you can see does not necessarily mean owning 70% of the company.

Founders often look at issued and outstanding shares and treat the resulting percentage as their ownership. But investors usually care about ownership on a fully diluted basis, which can also include the option pool, outstanding options and warrants, and shares that may be issued when SAFEs or convertible notes convert.

Imagine two founders hold 7 million of the company’s 10 million outstanding shares. On that view, they own 70%.

Now add a 1.5 million-share employee option pool and SAFEs expected to convert into another 2 million shares. The relevant denominator becomes 13.5 million shares.

The founders still own 7 million shares. But their effective ownership is now about 52%, not 70%.

Nothing happened to their shares. The denominator changed.

2. A higher valuation can still leave the founder owning less

Valuation tells you the price of the round. It does not, by itself, tell you the dilution.

Founders naturally gravitate toward the term sheet with the higher pre-money valuation. But other terms on the cap table can reverse the apparent advantage, particularly an investor requirement to increase the employee option pool before the investment closes.

Suppose one investor offers a $15 million pre-money valuation but requires the company to create a large option pool before investing. Another offers only a $12 million valuation but requires a much smaller pool.

If the pool increase is included in the pre-money capitalization, the new options dilute the existing shareholders rather than the incoming investor. It is therefore possible for the founders to own more of the company after accepting the $12 million valuation than they would after accepting the $15 million one.

The headline valuation is higher. The founder’s resulting ownership is lower. The cap table is where that difference becomes visible.

3. Owning 20% does not always mean receiving 20%

The cap table tells you who owns the securities. It does not guarantee that every dollar of value will be divided in the same percentages.

A founder may own 20% of the company on an as-converted basis and assume that a $50 million sale means a $10 million payout. That can be wrong because investors may own preferred shares with liquidation preferences or other economic rights.

Imagine investors have put $20 million into a company and hold a 1x liquidation preference. The founder owns 20% on an as-converted basis, and the company sells for $25 million.

Simply multiplying $25 million by 20% suggests a $5 million founder payout. But the preferred investors may first be entitled to recover their $20 million investment before the remaining proceeds are divided, depending on the terms of the preferred stock.

The founder’s ownership percentage has not changed. The economic outcome has. A cap table therefore answers an important question, who owns what, but not every question about who receives what.

Why does the cap table matter to early stage founders?

The cap table is one of the few documents that follows a startup through almost every important financing decision.

It shows how much of the company founders have already sold, how much room remains for employees, what outstanding securities may become shares, and what another financing could do to everyone’s ownership. It is also one of the first things a serious investor will scrutinize during diligence.

Small decisions accumulate. A few percentage points given to an adviser, a larger-than-expected option pool, several SAFEs raised at different terms, and another funding round can produce a company whose ownership looks very different from what its founders remember negotiating.

A clean cap table does not prevent dilution. It makes dilution visible before the founder agrees to it.

How wrong is too wrong?

Being slightly off because an employee has exercised a handful of options is a record-keeping problem. Believing you own 60% when your fully diluted ownership is 45% is a decision-making problem.

The dangerous threshold is reached when the error changes how a founder evaluates a financing, grants equity, negotiates an option pool, or estimates what shareholders will receive in an exit. By then, the cap table is no longer merely inaccurate. It is giving the founder the wrong picture of the company they are negotiating over.

What it actually means

Capitalization Table

A spreadsheet that defines the economics of a deal. It contains a detailed description of all the owners of stock of a company.