Dilution
Dilution is the % ownership reduction existing shareholders experience after a new round · typical 15-25% per standard round, more at hot pre-seed.
Dilution is the % ownership reduction existing shareholders experience after a new round · typical 15-25% per standard round, more at hot pre-seed.
Basic
When a company raises a new round, it issues new shares, increasing total shares outstanding. Existing shareholders own the same number of shares but a smaller % of the company. Dilution is the change. Typical: Series A ~20% dilution, Series B ~15%, Series C+ ~10%. AI hot rounds sometimes go higher (25-30%) when urgency to raise is extreme.
Deep
Dilution math: new ownership = existing shares / (existing + new shares). Pre-money valuation × ownership-pre = post-money × ownership-post. Pro-rata rights let existing investors buy in new rounds to maintain %. Option pool top-ups also dilute · companies usually top up to 10-15% post-Series B. Founder dilution trajectory: from 100% at founding to 15-30% post-Series C is typical. Frontier AI lab founders often below 10% post multiple mega-rounds.
Expert
Dilution dynamics shift at frontier AI scale. OpenAI has a complex LLC structure (capped-profit) that partially insulates employees from pure dilution. Anthropic's rapid $2B+ rounds from Amazon + Google compressed founder dilution even with huge absolute capital in. Pro-rata pressure on funds is brutal · a16z, Sequoia must follow-on $200M+ checks to maintain ownership. SAFE-heavy early rounds (YC + angel) can hide dilution until conversion.
Depending on why you're here
- ·New ownership = existing shares / (existing + new)
- ·Per-round typical: 10-25%
- ·Pro-rata rights mitigate for existing investors
- ·Founder dilution to 15-30% by Series C is normal
- ·Option pool top-ups dilute everyone
- ·SAFEs defer dilution but eventually convert
- ·Pro-rata critical for maintaining ownership at AI scale
- ·Follow-on check sizes escalating rapidly
- ·Frontier AI rounds compress founder + investor % faster than SaaS
- ·When a company sells new shares, old owners own a smaller slice
- ·Happens every funding round
- ·Founders often end up owning 10-30% after several rounds
AI dilution hurts · mega-rounds funded by compute realities mean founders dilute faster than SaaS. OpenAI + Anthropic founders below 10% is normal.