Liquidation preferences and waterfalls

Headline ownership percentages lie. In a sale, cash flows through a liquidation waterfall defined by preferred stock — not by "everyone owns X%, multiply by exit." The difference between a good outcome for common and a wipeout is often the liquidation preference, not the last round's valuation.

Preferred is a hybrid of equity and a debt-like claim. Until that claim is satisfied or converted, common owns a call option on the residual. Engineers meet this when reading an offer, watching an acquisition rumor, or walking a cap table. The mistake is always the same: multiplying ownership by enterprise value and stopping.

The clause lives in the term sheet. It pays out in M&A.

Concepts in this section

Step	Concept	What it answers
1	Non-participating preferred	Better of money back or converting — the market default.
2	Participating preferred	Preference plus a share of the rest?
3	Preference multiples	What does 2× do to common?
4	Seniority and stacked waterfalls	Who stands in front when there are two series?

Payout curves, same $10M at 25%

Build one column of exits and compute investor vs common. You will see a flat region (preference binds), a kink at indifference, then parallel ownership lines.

Exit	1× non-part investor	1× non-part common	1× part investor	1× part common
$20M	$10.0M	$10.0M	$12.5M	$7.5M
$40M	$10.0M	$30.0M	$17.5M	$22.5M
$100M	$25.0M	$75.0M	$32.5M	$67.5M

When someone says "the company is worth $100M," ask: preferred post-money, or what common receives in a sale today? Those diverge whenever preferences are in the money. That gap is also why 409A prices common below the last preferred round.

Preference overhang — total dollars of preference above common — is the one number to track after every financing. Any sale below it needs a special story for common (carve-out bonus, option acceleration into retention, or no deal).

Founders: negotiate 1× non-participating, pari passu across series when you can, and avoid stacked seniority unless the alternative is no deal. Employees: ask how many series exist and whether any participate. Finance should keep a living waterfall spreadsheet; it is as important as the headcount plan.

Common mistakes

Quoting employee upside as ownership × exit with no preference stack.
Ignoring senior later rounds when modeling Series A common.
Celebrating a high valuation that came with participating or 2× terms.
Forgetting notes and SAFEs, which become preferred with preferences of their own.

Key takeaways

1× non-participating: better of money-back or as-converted %.
Participating: money-back plus a share of the rest — costly for common.
Multiples and seniority move exit value without changing the pitch-deck valuation.
Common's real value is the residual after the waterfall, which is why 409A discounts common.
Know preference overhang as a single dollar figure after each financing.