Liquidation preferences and the exit waterfall, explained

Ask a founder what their equity is worth and the honest answer is: it depends entirely on the exit value, and not in a simple proportional way. Preferred stock's liquidation preferences, seniority stacking, and conversion decisions mean the same cap table can produce wildly different outcomes for common stock depending on how big the exit actually is. The mechanism that resolves all of this is called the exit waterfall, and it runs in three strict stages.

The cap table we'll use

Common stock: 6,000,000 shares. Series A — junior, non-participating, 1x preference: $3,000,000 invested, 2,000,000 shares. Series B — senior, participating with no cap, 1x preference: $5,000,000 invested, 3,000,000 shares. We'll run this exact table through two very different exit values.

Stage 1: liquidation preferences, paid by seniority

Preferred is paid its preference in seniority order — most senior first — before anyone else sees anything. Series that share a rank split pro-rata (pari-passu) if there isn't enough to cover the whole rank. Whatever's left after every preference is paid becomes the residual that flows into stages two and three.

Stage 2: does non-participating preferred convert?

Series A, being non-participating, faces a real choice at every exit: take its fixed preference, or give it up entirely and join common stock's pro-rata split of the residual instead. It always takes whichever is worth more. Because one series' decision changes how much residual is left for everyone else, this has to be solved iteratively — Foundily's engine does this automatically rather than assuming a fixed outcome.

Stage 3: the residual, split pro-rata

Whatever remains after preferences flows to common stock, any series that chose to convert, and any participating preferred (which collects here in addition to its Stage 1 preference) — all split by share count. This is the step that makes participating preferred so much more valuable than non-participating at a good exit: it never has to give up its guaranteed floor to also share in the upside.

Scenario A: a $6,000,000 exit

At this exit, there's barely enough to cover the senior preference, let alone leave anything meaningful behind.

Scenario B: a $40,000,000 exit

Same cap table, same terms — a much larger exit changes almost every outcome, including Series A's conversion decision.

The pattern worth remembering

Series B never had to make a decision — as uncapped participating preferred, it always takes its preference plus its pro-rata share of the residual, and that combination is never worse than converting, so the engine never even considers it converting. Series A's outcome, by contrast, swung from 'take the fixed $1,000,000 floor' to 'give up the floor entirely and take $6,364,000 as common' purely because the exit got big enough to make conversion the better deal. Common stock went from $0 to $19,091,000 across the same two scenarios. None of the contract terms changed between them — only the exit value did.

Model it before you need it

Liquidation preferences are easy to reason about in isolation and genuinely hard to reason about once seniority, participation, and conversion decisions interact — which is exactly the situation every real cap table with more than one preferred round is in. Run your actual terms through Foundily's exit waterfall calculator at a few different exit values, not just the one you're hoping for.