Cap Tables and VC Math: Ownership, Dilution, and Preferences

What a cap table is, and why the math matters

A capitalization table (cap table) lists every owner of a company's equity, founders, employees, and investors, and exactly how much of the company each of them owns. Unlike public equity, where ownership is just shares divided by shares outstanding, venture ownership gets complicated fast: every new financing round issues new shares that dilute everyone who was already there, option pools get carved out before a round even closes, and different investors can hold shares with very different rights at exit. Interviewers in venture, growth equity, and corporate development roles test this because it's the mechanic that actually determines who gets paid what, and how much, when a company raises money or sells.

Pre-money and post-money valuation

Pre-money valuation is what a company is deemed worth immediately before a new round of financing. Post-money valuation is that same company immediately after, once the new investor's cash is added in.

An investor's ownership percentage from a round is simply their investment divided by the post-money valuation, since post-money is the value of the whole company right after their cash becomes part of it.

Worked example: a startup raises $4mm at a $16mm pre-money valuation. Post-money is $16mm + $4mm = $20mm, and the new investor owns $4mm ÷ $20mm = 20% of the company.

Dilution: how everyone's stake shrinks in a new round

Every new share issued in a round dilutes every existing shareholder proportionally, founders and prior investors alike, since the same company is now divided into more total shares. If a new round sells a given percentage of the post-money company to new investors, every existing holder's stake shrinks by that same factor.

Worked example: a founder owns 60% before a round that sells 20% of the post-money company to new investors. The founder's stake becomes 60% × (1 − 20%) = 48%.

Existing investors with pro-rata rights can invest further in each new round specifically to maintain their existing ownership percentage rather than being diluted down; doing so requires investing that same percentage of the new round's total raise.

The option pool shuffle

New financing rounds typically also carve out (or top up) an employee option pool, conventionally sized as a percentage of the company and, importantly, taken out of the pre-money ownership rather than shared proportionally by everyone post-money. That means the post-money cap table splits three ways: the new investors' stake, the newly created or expanded option pool, and whatever percentage is left for everyone who held equity before the round.

Because the pool is carved out of the existing shareholders' side of the table rather than the new investors', this dilutes founders more than the round's headline investment percentage alone would suggest, a mechanic often called the “option pool shuffle” and one founders should watch closely when negotiating a term sheet.

Liquidation preferences: who gets paid first at exit

A liquidation preference entitles preferred investors to a specified multiple of their original investment back before common shareholders (typically founders and employees) see any proceeds at all from a sale or liquidation.

Worked example: a fund invested $10mm with a 1.5x liquidation preference. In a sale, $10mm × 1.5 = $15mm comes off the top before common shareholders receive anything. A standard 1.0x, non-participating preference simply returns the original investment first; participating preferred is more investor-favorable still, letting the investor take its preference and then also share in the remaining proceeds alongside common.

SAFEs and convertible notes: caps and discounts

Early rounds are often structured as SAFEs (simple agreements for future equity) or convertible notes rather than priced equity rounds, converting into shares later at the next priced round. Two features protect the early investor: a valuation cap (a ceiling on the valuation their investment converts at, even if the priced round is done at a higher valuation) and a discount (a percentage reduction off the priced round's per-share price).

When the priced round values the company above the cap, the SAFE converts as though the company were worth the cap, not the higher actual valuation:

A discount instead reduces the conversion price directly: Conversion Price = Priced Round Price × (1 − Discount %), giving the note holder more shares for the same dollar investment than new investors paying full price receive.

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