How venture works
Founder dilution across rounds
How 100% becomes the teens — pools, 15–25% primary rounds, and why landing in single digits at IPO is normal.
Ownership compounds downward. A single founder who starts at 50% and sees four primary rounds at ~20% dilution each without other effects would be at 50% × 0.8^4 ≈ 20.5% — and real life adds pools, SAFEs and secondary sales. Landing in the teens or single digits at IPO as a founder is normal for multi-round venture paths, not a personal failure.
Build the real path on a cap table; the staircase here is the intuition.
The big idea
Each primary round multiplies every existing holder's percent by (1 − new investor %). A 10% employee pool is the same kind of hit, taken earlier. Later pool refreshes and SAFE conversions hit again.
Employees hired at Series A own a thin slice of a growing pie; their outcome depends more on valuation growth than on fighting for an extra 0.05%. That is why employee equity evaluation needs stage context, not only percentage.
Walking through a full path
Start: founders 100%. After a 10% pool, founders 90%. Seed sells 20% → founders 72%. Series A sells 20% → founders 57.6%. Series B sells 18% → founders 47.2%. Series C sells 15% → founders 40.1%.
100% × 0.90 pool = 90%
90% × 0.80 seed = 72%
72% × 0.80 Series A = 57.6%
57.6% × 0.82 Series B = 47.2%
47.2% × 0.85 Series C = 40.1%Each step also dilutes the pool and prior investors the same way. Add a mid-stage pool refresh of 5% carved from pre-money holders and founder ownership drops again. By late stage, splitting that remaining founder block across two or three co-founders lands many individuals in the low-to-mid teens or below — before IPO dilution.
A shorter picture of the same idea: two founders start 50/50, create a 10% pool (45/45), sell 20% at seed (36/36). Series A sells another 20% and often refreshes the pool (the option-pool shuffle may allocate more pain to pre-round holders — details in option pools). Combined founder ownership after that A commonly lands in the high 20%s or lower, then drifts toward ~15–25% total by late stage.
Common mistakes
- Reading a seed 40% as an exit 40%. Four rounds at ~20% each cut it in half twice.
- Ignoring the pool. A 10% pool is a round you sell to future employees.
- Fighting for 0.05% at A while valuation growth is the actual lever.
Check yourself
Founders own 90% after the pool. Seed sells 20%. What do founders own?
90% × 0.80 = 72%.
Two co-founders split a remaining 40% founder block after Series C. Roughly what does each own before IPO dilution?
About 20% each — and later rounds and refreshes still sit ahead.
Key takeaways
- Each round multiplies existing ownership by
(1 − new investor %); pools do it too. - A clean path of pool + four primaries can take founders from 100% to ~40% combined.
- Split across co-founders, late-stage individual stakes in the teens or below are normal.
- Employee outcome is mostly valuation growth, not an extra 0.05%.