A cap table is the scoreboard of startup ownership. Every share of every class held by every person or entity, with all the conversion mechanics, vesting schedules, and option grants that turn those shares into actual economic outcomes at exit.
Founders think they understand their own cap table. Most do not. Investors think they can read a cap table in five minutes. Many cannot. The cap table is the most important document in a company's ownership history, and the number of people making million-dollar decisions based on a surface-level reading of one is higher than it should be.
This is a real walk-through of what a cap table shows, how to read one correctly, how it evolves through rounds, and the specific places where people get hurt.
The Short Definition
A capitalization table, or cap table, is a structured record of all the equity securities issued by a company and who holds them. It includes common stock, preferred stock, options, warrants, convertible notes, SAFEs, and any other instrument that converts into or represents ownership of the company.
At any moment, a cap table should answer precisely: if we liquidated this company today for $X, who gets what?
That is the only question that matters, and everything in the cap table exists to answer it.
The distinction between a "cap table" and the underlying legal documentation is often blurry. A cap table is a summary view built on top of the legal stack (charter, stock purchase agreements, note terms, SAFE terms, option grants). When cap table and legal docs conflict, the legal docs win. The cap table is only as accurate as its underlying data entry.
What a Cap Table Shows
A well-constructed cap table has several distinct views, each useful for different questions.
The Basic View: Shares by Holder and Class
The simplest view lists each holder, the number of shares they hold, and the class of those shares. At the earliest stages, this might be just the founders with common stock, plus maybe a small option pool. At later stages, it includes multiple preferred classes, options, warrants, and various convertible instruments.
Fully Diluted View
The most important operational view. This shows what ownership looks like if every convertible instrument converted today and every option were exercised. Fully diluted ownership is what matters for voting, for protective provisions, for exit economics, and for most real decisions.
The rule: whenever someone quotes "X owns Y%" without specifying, assume they mean fully diluted. If they do not mean fully diluted, treat the claim with skepticism.
Pre-Money and Post-Money Views
For any new round, the cap table has a pre-money view (before the new investment) and a post-money view (after). The delta between them is where dilution happens to existing holders.
Reading a term sheet requires being able to project what the post-money cap table will look like. If you cannot, you do not know what you are signing.
Exit Waterfall View
The most underused view and arguably the most important. An exit waterfall shows, at various hypothetical exit prices, how the proceeds would be distributed across all holders based on their class, liquidation preferences, participation rights, and other terms.
A cap table without an exit waterfall is incomplete. Liquidation preferences can dramatically change who gets what in any given exit scenario, and the surprises are almost always painful for founders and early common holders.
The Instruments You Will See
A real cap table contains several types of equity instruments, each with its own mechanics.
Common Stock
The baseline. Founders hold common. Employees hold common (usually through options). Common holders bear the residual risk and get the residual reward after all preferred preferences have been paid.
Preferred Stock
What investors hold. Preferred stock comes in series (Series A, Series B, etc.) and each series typically has its own preference terms. Preferred sits above common in liquidation preference and often has additional rights (board representation, protective provisions, anti-dilution).
Options
A right to purchase common stock at a specified exercise price. Typically granted to employees and advisors. Options vest over time (standard is four years with a one-year cliff) and typically expire if unexercised after a set period (10 years for ISOs).
Unexercised options sit in the option pool and appear in the fully diluted cap table as if they were exercised.
Warrants
Similar to options but often granted to non-employees (lenders, strategic partners, occasionally investors). Included in the fully diluted cap table.
Convertible Notes
Debt instruments that convert into equity at a future financing round. Convert at a discount to the next round price and/or at a valuation cap, whichever is more favorable to the note holder.
Convertible notes do not appear in the cap table as equity until they convert. But if you are looking at a cap table that has $2M in outstanding convertible notes at a $10M cap, you need to project what the post-conversion cap table will look like.
SAFEs
Similar to convertible notes but not debt. "Simple Agreement for Future Equity." Converts at the next priced round, typically with a valuation cap and/or discount.
SAFEs are now the most common instrument for pre-seed and seed financing. Like notes, they do not appear as equity on the cap table until they convert, but their conversion mechanics are material to how the cap table will evolve.
SAFE accumulation is one of the most common cap table problems I see. A company raises $500K on SAFEs at a $5M cap, then another $1M at $8M cap, then another $750K at $10M cap. When the priced round happens, the combined dilution from all the SAFEs can be materially higher than anyone expected. Always model SAFE conversion before signing another round of SAFEs.
How a Cap Table Evolves
Every round reshapes the cap table. Here is the typical trajectory.
Incorporation
Founders own 100% of common stock. Typically two to four founders split the equity based on contributions, vision, and agreement. Vesting schedules apply to founder shares in most well-structured companies.
Option Pool
Before or at first financing, an option pool is created. A typical starting pool is 10% to 15% of fully diluted shares. This dilutes founders to 85% to 90% fully diluted.
Pre-Seed / Seed on SAFEs or Notes
First outside money comes in, typically on SAFEs or convertible notes. These do not show on the cap table as equity yet, but they will convert at the next priced round.
Priced Seed or Series A
Major cap table restructuring. Preferred stock is issued. All outstanding SAFEs and notes convert at their respective caps. Option pool is typically refreshed. Dilution for common holders at this point often ranges from 20% to 40% total, depending on the size of the round and the refresh.
Series B and Beyond
Each subsequent round adds a new class of preferred, dilutes all existing holders, and typically refreshes the option pool further. Cap tables get progressively more complex with each round.
Secondary Transactions
Existing holders (founders, early employees, early investors) occasionally sell some of their shares to new or existing investors, without raising new capital for the company. This changes ownership but not the total share count.
The Math You Have to Do
Reading a cap table well requires being fluent in a few calculations.
Ownership Percentage
Your shares (fully diluted) divided by total shares (fully diluted). This is your economic ownership.
Dilution from a New Round
If the company issues new shares equal to 20% of the post-money cap table, every existing holder is diluted by 20%. Owning 10% pre-round becomes 8% post-round (10% times 80%).
Liquidation Preference Math
If investors hold $10M of 1x non-participating preferred, they take either their $10M preference or their common-equivalent share of the proceeds, whichever is higher. Knowing where that crossover point is for each exit scenario is important.
If preferred is 2x participating, they take $20M off the top AND their pro-rata share of the remaining proceeds. The impact on common holders can be dramatic.
Option Pool Dilution Allocation
Pre-money option pool creation dilutes existing holders (founders). Post-money creation dilutes existing holders and new investors together. The difference for founders on a $20M post-money round with a 10% pool can easily be 1.5% to 2% of the company.
SAFE Conversion
If the company raised $1M on a SAFE with an $8M cap, and the priced round happens at $15M pre-money, the SAFE converts at the $8M cap, getting 1/8 of the fully diluted post-conversion shares issued against the cap. This is effectively 12.5% ownership from a $1M check, which dilutes everyone else accordingly.
A useful habit: every time you get a term sheet, model three scenarios. What does the cap table look like at the stated terms? What does it look like at modest downside (smaller round, more dilution)? What does it look like at meaningful upside (the round oversubscribes, bigger option pool required)? You will catch problems you would have missed looking at only the base case.
What Founders Should Watch
Founders should pay attention to a few specific things.
Total Dilution Through Current Round
Not just the dilution from this round. Cumulative dilution from all rounds to date. Founders sometimes focus on each individual round and lose track of how little they own collectively across multiple rounds.
A rough benchmark: founders typically hold 20% to 30% of a company at Series B, 15% to 20% at Series C, and 10% to 15% at later stages. If you are substantially below these ranges, you may have over-diluted, or you may have raised too many rounds.
Aggregate Preference Stack
The total dollar amount of liquidation preferences stacked across all investor classes. In a $100M exit with $60M in preferences stacked, only $40M flows to common (if preferences are non-participating). Over multiple rounds, the stack can grow to a point where common outcomes at modest exits become negligible.
Option Pool Runway
How many options remain unallocated in the pool. If the pool is almost empty and you have not budgeted a refresh at the next round, the next hire may require issuing options that do not exist.
Founder Vesting Status
Are your founder shares still vesting? If you leave the company (voluntarily or not), you forfeit unvested shares. Know your vesting status, especially around the four-year mark when initial grants typically fully vest.
What Investors Should Watch
Investors reading a cap table for diligence should pay attention to different things.
Existing Preference Stack
Before investing, check the total preference already ahead of the common. A company with $30M of stacked preference on a $40M post-money valuation is not the same as a company with $5M of preference on the same valuation. The upside math is completely different.
Option Pool Adequacy
Is the existing pool big enough for the company's hiring plans until the next round? If not, a pool refresh will need to happen at this round, which either dilutes founders further or comes out of your ownership.
SAFE and Note Overhang
If there are outstanding SAFEs or notes that have not converted, project their conversion at the current round. Significant overhang can materially change the post-round cap table relative to what the term sheet claims.
Founder Ownership
If founders own too little post-round, their motivation is at risk. A founder who will own 5% fully diluted at the Series B exit is not economically aligned enough to run a decade-long company. This is not just an ethics issue, it is a portfolio risk.
Pro Rata Rights Aggregate
If all existing investors with pro rata rights exercise them, how much room is there for new investors in the next round? An over-allocated pro rata stack can make it hard to bring in new lead investors.
The most damaging cap table mistakes are usually not bad math. They are incomplete views. Investors who only look at the post-money ownership percentages without reading the preference terms, without modeling SAFE conversions, and without understanding founder vesting status are making decisions with one eye closed. Get a full picture before investing.
The Most Common Cap Table Mistakes
A short list of the mistakes I see most often.
Not running an exit waterfall. Investors and founders both make decisions without modeling what happens at various exit prices. The surprises are always unpleasant.
Accumulating too many SAFEs at increasing caps. Each SAFE feels manageable individually. In aggregate, they can dilute founders and early investors substantially more than expected.
Not tracking convertible note interest. Convertible notes accrue interest. At conversion, you convert the principal plus accrued interest, which increases dilution.
Ignoring secondary transactions. If founders or early employees sell secondary, the ownership distribution changes even if the share count does not. This affects motivation and alignment in non-obvious ways.
Over-granting options without refresh budgeting. Generous early option grants feel great until you realize you have depleted the pool and the next round will either dilute founders or shrink the pool going forward.
Not understanding option exercise economics. When employees exercise options, they pay the exercise price to the company. If the exercise price is much lower than fair market value, they owe taxes on the spread. Employees who do not plan for this end up in hard spots.
Tools for Managing a Cap Table
For very early-stage companies, a well-maintained spreadsheet can work. Once the company has more than a handful of holders and any preferred classes, dedicated software (Carta, Pulley, Capdesk, and others) is nearly essential. Mistakes in cap table accounting get expensive to unwind.
The tools do not replace understanding. They just reduce errors in maintenance. You still have to know what the numbers mean.
The Bigger Point
A cap table is not just a document. It is the record of every ownership decision a company has made, and the blueprint for how any future value gets distributed. Treating it as a back-office concern that only matters at exit is how founders and investors end up with outcomes they did not expect.
For founders: spend a day per year really understanding your own cap table. Model what the next round will do to it. Know where your ownership is headed. You cannot delegate this understanding to your lawyer or your CFO, because they are not the ones who bear the outcome.
For investors: read the full cap table before investing, not just the summary. Model the waterfall. Understand the aggregate preference stack. The cap tables that look clean in the deck are sometimes the ones with the biggest problems in the actual legal documents.
The cap table is where long, complicated, multi-round stories about companies eventually resolve. Getting good at reading one, and getting good at projecting how yours will evolve, is one of the highest-leverage skills in private markets.
If you are looking for real-time visibility into market standards, current round structures, and sector-specific cap table norms, that is part of what Brevoir → makes available. Current valuations, round sizes, and structural patterns → across your target sectors and stages, so your cap table decisions are grounded in today's market rather than last year's assumptions.
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