Equity dilution is the reduction in existing shareholders' ownership percentage that occurs when a company issues new shares — typically during a funding round, option pool creation, or conversion of SAFEs and convertible notes. Modeling dilution through a pro-forma cap table is essential for making informed decisions about how much to raise, at what valuation, and with what option pool size. [src1]
START — Founder needs to understand equity ownership
├── What's the specific question?
│ ├── "How much will I be diluted?" → Dilution Modeling ← YOU ARE HERE
│ ├── "What instrument should I use?" → SAFE vs Convertible Note
│ ├── "How do I set up co-founder splits?" → Founder Vesting
│ └── "How do I manage my cap table?" → Cap Table Management
├── What stage?
│ ├── Pre-seed → Simple: Investment / Post-money = investor %
│ ├── Seed with SAFEs → Include all SAFE conversion in cap table
│ ├── Series A → Model option pool shuffle (pre-money creation)
│ └── Series B+ → Full waterfall with liquidation preferences
└── Is this a down round?
├── YES → Model anti-dilution provisions
└── NO → Standard dilution calculationA founder hears "$20M valuation" and assumes 80% ownership after a $4M raise. With a 15% pre-money option pool, actual dilution is significantly higher. [src2]
Calculate ownership from the fully diluted share count including option pool, SAFE conversions, and new investment. [src1]
Founders surprised at Series A when all SAFEs convert and dilution is 10-15% higher than expected. [src5]
Every SAFE, note, and warrant should appear on the cap table when signed. Model conversion quarterly. [src4]
$10M at $100M sounds great but if the company cannot grow into that valuation, the next round becomes a down round with anti-dilution crushing common shareholders. [src3]
Accept a reasonable valuation you can grow into, avoiding the down-round trap. [src3]
Misconception: Dilution is always bad and should be minimized at all costs.
Reality: A smaller slice of a much larger pie is worth more. The goal is optimizing the trade-off between dilution and growth capital. [src3]
Misconception: The option pool comes from the investor's allocation.
Reality: Created pre-money by convention, the pool comes from existing shareholders' ownership. [src2]
Misconception: A higher valuation always means less dilution.
Reality: Higher valuations create expectations; if not met, anti-dilution provisions in down rounds can cause more dilution than a lower initial valuation. [src5]
| Concept | Key Difference | When to Use |
|---|---|---|
| Equity Dilution Modeling | Projects ownership changes across rounds | Before any funding round |
| Cap Table Management | Ongoing tracking of all equity holders | Continuous operational process |
| Waterfall Analysis | Models payout at various exit valuations | Exit scenarios with liquidation preferences |
| Option Pool Planning | Sizing and allocation of employee equity | ESOP design and investor negotiations |
Fetch this when a founder asks about dilution impact, pro-forma cap tables, option pool shuffles, pre-money vs post-money differences, or modeling ownership across multiple rounds.