Ownership Dilution Calculator

Seed rounds typically dilute existing shareholders by 15-25%, and Series A rounds by 20-30%. By the time a startup reaches Series B, founders often hold 20-30% combined. The key is to ensure each round increases the value of your remaining stake enough to justify the dilution.

The option pool shuffle is when investors require the company to increase its employee option pool before the round closes, with the increase carved out of the pre-money valuation. This means existing shareholders (founders) bear 100% of the option pool dilution, not the new investors. A 10% option pool increase on a $10M pre-money effectively reduces your real pre-money to $9M.

Focus on the dollar value of your ownership, not just the percentage. If your 40% stake is worth $4M pre-round and drops to 32% but is now worth $8M post-round, you are better off. However, percentage matters for control — below certain thresholds you may lose board seats or veto rights.

Raise less money and use it more efficiently. Negotiate a higher pre-money valuation (though only if you can back it up with traction). Push back on option pool increases or negotiate them smaller. Consider alternative financing like revenue-based financing or venture debt for part of your capital needs. The best way to minimize dilution is to have multiple competing term sheets.