> In startups, why do the founders receive such a disproportionate percentage of equity? Because on day zero, 100% of the company must be owned, and the founders are the only ones there. Equity to founders isn't handed out based on an arm's-length negotiation, or on the basis of work done.
But all other stock allocations are an arms length transaction; so all you've done is reframe the question to "why do the founders retain so much equity?" Why dont seed fund demand 16% instead of 8%? Why doesn't the 6th employee demand 5% instead of 3%?
The founders can only retain as much equity as the marketplace allows. Each side has a threshold to do a business transaction.
>Why dont seed fund demand 16% instead of 8%? Why doesn't the 6th employee demand 5% instead of 3%?
The parties can demand any percentage they want but the ultimate resolution is will the other side agree to it? In other words, the question is, "Why do angels _agree_ to 8% instead of 16%"? Because an offer requiring 16% would be rejected by the founder and lose to other angels only requesting 8%.
E.g., back in 1999 during the dot-com craze, VC Sequoia Capital offered MP3.com (founder Michael Robertson) $10 million for 45% of the company. He said no deal. They later negotiated it down to 20% ... which is in the more reasonable ~15% to ~20% range of other VC deals.
Lesson: Demanding a high 45% so that the founder only retains 55% instead of 80% doesn't automatically mean the founder will say "yes" to the reduced equity. People can still voluntarily choose not to do business with you at all. All "demands" are competing in the marketplace. Can an employee demand a higher 10% equity? Sure. Whether the founders _agree_ to it depends on the marketplace and the employee's particular leverage (e.g. a very rare skill).