A cap table (capitalization table) is the definitive record of who owns what in a startup. It tracks every equity instrument the company has issued — common shares, preferred shares, stock options, warrants, SAFEs, and convertible notes — and calculates each stakeholder's ownership on both a fully diluted and outstanding-shares basis.
What a cap table includes
A well-maintained cap table contains:
- Founders' common stock — shares issued at incorporation, typically at $0.0001/share
- Investor preferred stock — shares issued in priced rounds with specific rights
- Employee option pool — reserved shares for current and future employee grants
- Outstanding options and grants — individual employee allocations, vesting schedules, and exercise prices
- SAFEs and convertible notes — modeled as-if-converted to show pro forma dilution
- Warrants — rights to purchase shares at a predetermined price
Why cap table hygiene matters
Messy cap tables are one of the top reasons deals fall apart during due diligence. Common problems include:
- Unissued founder shares — founders who never formally received their stock
- Missing 83(b) elections — costing founders massive tax liabilities
- Untracked SAFEs — founders who don't model cumulative SAFE dilution until it's too late
- Incorrect option pool math — leading to surprises at Series A when investors require a top-up
Tools and management
Most startups in 2026 manage cap tables with platforms like Carta, Pulley, or AngelList Stack. These tools automate 409A valuations, option grant tracking, and waterfall modeling. However, founders should still understand the underlying math — particularly how option pool shuffles and SAFE conversions affect their personal ownership.
A practical example
At incorporation, two co-founders split 10,000,000 shares 60/40. They create a 15% option pool (1,764,706 new shares) and raise $1.5M on a $10M post-money SAFE. On a fully-diluted basis, Founder A owns ~50.8%, Founder B owns ~33.9%, the option pool is ~15%, and SAFE holders represent the remaining percentage at conversion.