What is equity dilution in startups and how does it work?

Equity dilution occurs when new shares are issued, reducing existing shareholders' ownership percentage but not necessarily their absolute value.

Equity dilution is a fundamental concept in startup law that occurs when a company issues new shares, resulting in a reduction of existing shareholders' ownership percentage. This typically happens during funding rounds when investors receive shares in exchange for capital.

For example, if you own 100 shares out of 1,000 total shares (10% ownership), and the company issues 500 new shares to investors, you still own 100 shares but now out of 1,500 total shares, reducing your ownership to 6.67%. However, dilution isn't always negative—if the company's valuation increases significantly due to the new investment, your smaller percentage could still represent greater absolute value.

There are two main types: economic dilution (reduction in ownership percentage) and value dilution (reduction in per-share value). Anti-dilution provisions can protect early investors from certain types of dilution, particularly down rounds where shares are issued at lower valuations.

Understanding dilution is crucial for founders and early employees with equity stakes. Properly structured vesting schedules and option pools help manage dilution effects over time. Legal documentation like shareholder agreements and term sheets should clearly outline dilution scenarios and protections. As Michiel Sudnik from Deloitte Legal often advises clients, understanding dilution mechanics early helps founders make informed decisions about equity distribution and fundraising strategies.

For personalized guidance, consult a Startup Law specialist on TinRate.