Founder Dilution
Percentage of founders' fully-diluted ownership that is given up in the new round, including any pre-close option-pool top-up (the "option pool shuffle" — option-pool expansion taken in the pre-money dilutes existing holders rather than new investors). Common pitfall: founders often quote the "investor dilution" (new money / post-money) and forget the option-pool top-up component. The Carta State of Private Markets quarterly reports publish stage-typical dilution ranges that boards should use as a sanity check. — Fundraising KPI anchored to Carta State of Private Markets Q3 2025.
Rogue ID: fundraising.founder_dilution
Type: Percentage (%)
Domain: Fundraising
Definition
Percentage of founders' fully-diluted ownership that is given up in the new round, including any pre-close option-pool top-up (the "option pool shuffle" — option-pool expansion taken in the pre-money dilutes existing holders rather than new investors). Common pitfall: founders often quote the "investor dilution" (new money / post-money) and forget the option-pool top-up component. The Carta State of Private Markets quarterly reports publish stage-typical dilution ranges that boards should use as a sanity check.
Formula
founder_dilution_pct = (founder_shares_pre − founder_shares_post) / founder_shares_pre × 100. Includes both new-money dilution and any pre-close option-pool top-up borne in the pre-money. Per Carta State of Private Markets methodology.Why it matters
Tracks founder skin-in-the-game over time — sustained ownership matters for long-term motivation and signaling to future investors. Boards balance dilution discipline against capital needs.
How to interpret
Per Carta State of Private Markets benchmarks, typical per-round dilution for the priced round (excluding pool top-up) is 18–22% at seed, 18–22% at A, 12–18% at B, 10–15% at C+. Out-of-band dilution either signals weak negotiating position or a strategic priced-up next-round set-up.
Related KPIs
fundraising.pre_money_valuationfundraising.post_money_valuationfundraising.total_round_size
Source
Carta State of Private Markets Q3 2025 · section: Seed Round Dilution — published 2025-10-01.
Why does this cite Carta State of Private Markets Q3 2025? Read the ontology methodology for the published vs editorial tier system, attribution rules, and dispute process.
Industry benchmark
A reference distribution sourced from Carta State of Private Markets Q3 2025 (2025):
| Percentile | Value |
|---|---|
| 25th | 12% |
| Median | 18% |
| 75th | 24% |
Lower is better.
Stage relevance
| Company stage | Priority |
|---|---|
| Pre-Seed | Core |
| Seed | Core |
| Series A | Core |
| Series B | Core |
| Series C+ | Core |
Suggested for stages: Pre-Seed, Seed, Series A, Series B, Series C+.
Default owning functions
- Finance
Machine-readable
- This KPI as JSON:
/api/ontology/fundraising/founder_dilution.json - All Fundraising KPIs:
/api/ontology/fundraising.json - Full catalog:
/api/ontology/index.json
Outstanding Convertible Amount
Total principal value of SAFEs and convertible notes outstanding that have not yet converted to equity. These convert at the next priced round, typically at a discount or valuation cap (per the standard Y Combinator SAFE templates and the National Venture Capital Association convertible-note model). Common pitfall: a SAFE stack quietly accumulating between rounds can convert into 15–25% dilution at the next priced round, surprising founders who modeled "we only sold 10% in this priced round" math. Boards should always see the fully-diluted cap table including SAFE conversion. — Fundraising KPI anchored to Y Combinator Post-Money SAFE (2018+ standard form).
Post-Money Valuation
Company valuation immediately after the new round closes, including the new capital raised — the canonical "valuation" number quoted in TechCrunch headlines. Per NVCA Model Documents, post-money = pre-money + new money raised. Common pitfall: post-money math gets messy with SAFEs — modern post-money SAFEs (the YC 2018+ form, per the Y Combinator SAFE primer) fix dilution at the SAFE's valuation cap regardless of subsequent priced-round pricing, so the board should always reconcile the headline post-money against the fully-diluted cap table. — Fundraising KPI anchored to NVCA Model Legal Documents (2024 revision).