Fundraising
Dilution
The reduction in an existing shareholder's ownership percentage that occurs when a company issues new shares — through equity rounds, option grants, or convertible instrument conversions.
Dilution is the decrease in a shareholder's percentage ownership of a company that occurs whenever new shares are issued. Every equity financing round, employee stock option grant, warrant exercise, and convertible instrument conversion creates new shares — reducing the ownership percentage of all existing shareholders.
Dilution is not inherently negative. If a company raises capital that increases its value more than the dilution decreases the shareholder's percentage, the shareholder's absolute dollar value (stake value) increases. The goal is for the value of your stake to grow even as its percentage shrinks.
Dilution is typically expressed in percentage points (e.g., a 25% dilutive round reduces existing ownership by 25%) or in terms of ownership before and after a transaction.
In Practice
A founder owns 100% of her company (1,000,000 shares). She raises a Seed round, issuing 200,000 new shares to investors. She now owns 1,000,000 / 1,200,000 = 83.3% — she was diluted by 16.7 percentage points. If the Seed round values her company at $5M post-money, her 83.3% stake is worth $4.17M — more than her 100% stake was worth before the round. This is the dilution/value creation trade-off.
Why It Matters
Every founder must model cumulative dilution across their financing plan. If you raise four rounds averaging 20% dilution each, you'll own roughly 41% of your company before exit — less than you might expect. Founders who don't model this are often surprised at how little they receive at a seemingly good exit. Managing dilution through valuation, round size, and option pool efficiency is a core skill.
VC Beast Take
The real dilution trap isn't any single round — it's the cumulative effect of multiple rounds plus the ESOP pool. By Series B, founders who started with 100% can easily be down to 30-40%. This isn't necessarily bad if the company is worth enough, but founders should model it explicitly before every raise. The best protection against excessive dilution is capital efficiency: raise what you need, hit the milestones that justify the valuation, and avoid bridge rounds.