Ownership at exit is ownership today multiplied by every round's dilution

An early investor's final ownership is their entry stake reduced by each later round and option pool increase. Modelling the chain shows what exit value is needed for a target return.

11 min read · Level 5

The point

I think every early-stage investment decision should include one line: the exit value needed for a 10x return after expected dilution. It is a single number, it takes two minutes, and it regularly turns an exciting valuation into an obviously demanding one.

What is it?

Each round that sells new shares reduces existing holders' ownership by a factor of (1 - share sold). Option pool increases do the same.

An investor puts 1,000,000 into a seed round at a 10,000,000 post-money, owning 10%.

Event Factor Ownership after Seed 10.000% Series A: 20% sold x 0.80 8.000% Series A: option pool increase of 5% x 0.95 7.600% Series B: 15% sold x 0.85 6.460% Series C: 12% sold x 0.88 about 5.685%

10% x 0.80 x 0.95 x 0.85 x 0.88 = about 5.685%.

Retention ratio: 5.685% / 10% = about 57%.

At a 500,000,000 exit, ignoring preferences:

Proceeds = 500,000,000 x 5.685% = about 28,424,000 Multiple = 28,424,000 / 1,000,000 = about 28.4x

Exit needed for a 10x return: 10,000,000 / 5.685% = about 175,900,000.

Why does an investor care?

Because early investors frequently calculate returns using their entry ownership, which overstates proceeds by the full effect of later dilution - here by about 43%.

Modelling the chain also shows which assumptions matter most: the number of future rounds and the size of option pool increases.

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Educational, not personalised financial advice. Nothing in the Investor Academy is a recommendation to buy, sell or hold anything — what is right for you depends on your own circumstances and the rules where you live.

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Example

Two dilution paths for the same investment.

Path Rounds after seed Final ownership Proceeds at 500,000,000 Efficient company Series A 20%, pool 5% 7.600% 38,000,000 Capital-intensive company A 20%, pool 5%, B 15%, C 12%, D 15% about 4.832% about 24,160,000

5.685% x 0.85 = about 4.832%. The capital-intensive path needs two more rounds and leaves the seed investor with about 36% less ownership than the efficient path (4.832 / 7.6 is about 0.636). The same exit value is worth far less to them.

The common mistake

Calculating exit proceeds from entry ownership, without applying the dilution of every future round and option pool increase.

How it works

Step 1: List expected future rounds

Estimate the number of rounds and the share sold in each.

Step 2: Include option pool increases

Add expected pool top-ups as dilution factors.

Step 3: Multiply the factors

Apply each factor to entry ownership to get ownership at exit.

Step 4: Solve for the exit you need

Divide your target proceeds by ownership at exit.

When to use this

When estimating returns from an early-stage investment or comparing companies with different capital needs.

When not to use it

Do not treat the modelled path as certain; run efficient and capital-intensive versions.

How investors actually did it

A recurring pattern: typical dilution per round

Market reports from equity management platforms and venture data providers have regularly published median dilution per round for seed through later stages, typically in the range of roughly 10% to 25% per round, varying with market conditions.

Use recent median dilution data for the relevant stage when building a dilution path.

Do this now

Multiply your entry ownership by three expected dilution factors
Calculate the exit needed for a 10x return on one investment

Create a free account to read the rest and apply it to your own investing.

Related lessons

A smaller slice of a much bigger company is usually the good outcome — Each funding round reduces existing holders' percentage. Dilution is not a loss in itself; it becomes one when the company's value does not rise enough to compensate, as in a down round. (12 min)
Model the rounds between now and the exit, or your ownership estimate is fiction — Today's percentage is not what you will hold at an exit. Projecting future rounds and pool top-ups gives a realistic ownership figure and a much better sense of what an outcome would return. (12 min)
The VC method works backwards from the exit — The venture capital method starts from a plausible exit value, divides by the return an investor needs, and adjusts for future dilution to reach what the company can be worth today. (11 min)