Percentage versus value
Dilution reduces an existing owner’s percentage when new shares are issued. That sounds inherently negative, but percentage ownership is only half of the equation. A smaller percentage of a much more valuable company can be worth more than a larger percentage of an undercapitalized one.
The central question is whether the new capital, talent, or strategic access creates enough incremental value to offset the reduced ownership share.
The cap table compounds too
Successive financing rounds, employee option pools, acquisitions paid in stock, and convertible instruments can all change ownership. Founders should model the cumulative effect rather than evaluating each event in isolation.
Terms matter alongside percentage. Liquidation preferences, participation rights, board control, protective provisions, and vesting can affect economic and decision-making outcomes.
Use scenarios, not certainty
A dilution model should compare several company-value outcomes after financing, including failure and slower-than-planned growth. The purpose is not to predict the future precisely. It is to understand what must become true for the trade to work.