Dilution Calculator

Model Seed through Series B — raise amounts, pre-money valuations and option pool top-ups — to track founder and investor ownership as the cap table dilutes round over round.

Assumptions

Starting option pool%Seed raise$MSeed pre-money$MSeed pool top-up% postSeries A raise$MSeries A pre-money$MSeries A pool top-up% postSeries B raise$MSeries B pre-money$MSeries B pool top-up% post

Results

Founders after Seed

63.0%

Founders after Series A

47.3%

Seed investors (at B)

11.7%

Series A investors (at B)

15.6%

Series B investors

17.2%

Option pool (at B)

18.8%

Founders after Series B

36.7%

Founder stake value

$53.3M

Pool top-ups come out of the pre-money — they dilute existing holders, not the incoming investor. Entry ownership is not final ownership: a 20% seed stake drifts toward ~12% by Series B without pro rata. Illustration only.

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