A heavy preference stack describes a cap table where cumulative liquidation preferences from multiple funding rounds create a large hurdle that must clear before common stockholders — including founders and employees — receive proceeds.

How it works

Each preferred stock round typically carries a liquidation preference: on sale or bankruptcy, preferred holders get paid before common. A Series A might have a 1x preference on $10 million; Series B adds another 1x on $30 million; Series C adds $80 million more. On a $100 million exit, the waterfall pays preferred holders first. If preferences plus participation rights consume most of the proceeds, common holders split what remains — sometimes zero. Participating preferred, multiples above 1x, and cumulative dividends thicken the stack further. Founders should build a waterfall model for several exit scenarios before accepting new rounds that add to the stack.

Why it matters

• Founders: Paper wealth on a 409A or last-round valuation can disappear in a down exit if the preference stack eats the proceeds. Negotiating non-participating preferred and avoiding excessive multiples protects common upside.
• Investors: Later investors analyze whether earlier stacks block their returns at realistic exit ranges; conversion analysis determines whether preferred converts to common or takes preference.

Common mistake

Looking only at post-money valuation without running a liquidation waterfall. A high valuation with heavy preferences can be worse for founders than a lower valuation with clean terms.

Related ideas

Liquidation preference, participating preferred, waterfall analysis, and cap table modeling are essential companions.