equity dilution
Equity Dilution
The shrinking of existing shareholders' ownership percentage when a company issues new shares — usually in a funding round or to employees.
When you'd see it: Every funding round, every employee stock grant. A founder who owned 100% before raising might own 70% after a seed round, 50% after Series A, 30% by Series C — even as the company grows. Dilution is the price paid for outside capital.
Why it matters: Dilution is why owning a smaller slice of a bigger pie can still be a great outcome — or a terrible one. A founder diluted from 100% to 5% of a billion-dollar company comes out far ahead; a founder diluted to 5% of a company worth what they started with comes out behind. Watching the math through each round is how investors and operators judge whether raising made sense.
Common mistakes: Treating dilution as automatically bad. Dilution funds growth; the question is whether the growth justifies it. Also confusing dilution percentages with valuation drops — selling 20% of the company is not the same as the company's value dropping 20%. The first is normal financing; the second is a down round and usually a problem.
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