It can vary a lot, of course. If you never raise venture capital, the founder-CEO might own 50%, or even 100% in some cases. The founders of $10B+ Mailchimp still own 100% of the company, for example.
But, on average, venture-backed founder CEOs tend to end up owning 15% of their companies after all the dilution from multiple fundraising rounds.
That’s a good way to model things out over time, especially as you think about raising money, and going long.
