Angel Investing Terms: A Plain-English Deal Glossary

Brian Nichols is the co-founder of Angel Squad, an angel investing community where aspiring and active angels learn from Hustle Fund’s approach, review curated deal flow, and connect with peers.

A founder sends you a deal document. You recognize the investment amount, but the cap, conversion terms, and side letter need translating. Those words determine what you buy, how your ownership can change, and where you stand if the company sells. You can learn the vocabulary without becoming a lawyer. Start with the document, then work through the price, ownership, rights, and payout terms.

The documents and ownership basics

Term sheet and definitive documents

A term sheet summarizes a proposed investment’s main terms, such as price, what you’re buying, and investor rights. Its main deal terms are generally nonbinding. Confidentiality, expenses, and exclusivity, sometimes called a no-shop clause, can still bind the parties.

Definitive documents are the final agreements and corporate documents that put the deal into effect. A priced stock investment may involve a stock purchase agreement, the company’s charter setting out share rights, an investors’ rights agreement, and a voting agreement. A summary in a pitch deck doesn’t replace those documents.

Cap table and fully diluted ownership

A capitalization table, or cap table, records the company’s ownership and securities. It can show shares, options, warrants, and contracts that may later become shares. Options and warrants give their holders a right to purchase shares under specified conditions.

Fully diluted ownership measures your stake using a share count that includes specified potential shares, such as options and contracts that can convert into shares. The denominator matters: agreements differ on whether they include ungranted options, promised grants, or a new option-pool increase. “You’ll own 1%” needs a defined share count and a defined moment in time.

Side letter

A side letter is a separate agreement that gives an investor additional rights or modifies agreed terms. It might grant participation in a future financing or access to financial reports. Those rights belong to the parties covered by the agreement; they aren’t automatically available to every investor in the round.

Accredited investor

An accredited investor meets one of the eligibility routes under US securities rules, including financial or professional criteria. The Securities and Exchange Commission’s accreditation criteria cover more than income and net worth. Whether non-accredited investors can participate depends on the offering’s legal exemption and restrictions.

For vocabulary beyond deal documents, our broader venture glossary covers company metrics, fund roles, and fundraising stages.

What you buy: equity and convertible instruments

An investment instrument is the security or contract you purchase. Direct shares and contracts for future shares give you different rights before the next financing.

Equity, common stock, and preferred stock

Equity is ownership in a company. In a corporation, it takes the form of shares. Common stock is the share class founders and employees often hold; preferred stock has rights set out in the company’s charter, potentially including payment priority and conversion into common stock.

Preferred doesn’t describe one uniform package of protections. Your series of preferred stock, the charter, and related agreements determine the rights. Owning shares now also doesn’t freeze your ownership percentage through later financings.

Priced round

A priced round is a financing in which investors purchase shares at an agreed price per share. The valuation and capitalization used to set that price determine how many shares the new investment buys. Existing contracts for future shares may convert as part of the same closing.

Simple Agreement for Future Equity (SAFE)

A Simple Agreement for Future Equity (SAFE) is a contract for future equity. You pay now; you don't receive issued shares at signing. The standard Y Combinator (YC) US SAFE has no interest or maturity date.

An equity financing triggers conversion into preferred shares under that form. A sale or initial public offering before conversion instead triggers the agreement’s liquidity provisions. In YC’s cap-only SAFE form, the payout is the greater of your investment amount or proceeds calculated as if the SAFE represented common shares, subject to payment priority and legally available proceeds.

Under section 1(b), proceeds owed to you are due immediately before or concurrently with the liquidity event’s completion. Those proceeds can be cash, stock, or other assets. A liquidity event doesn’t mean every SAFE automatically issues shares.

If no triggering event occurs, a SAFE can remain outstanding indefinitely. A shutdown can leave nothing available to pay its holders.

Convertible note, interest, and maturity date

A convertible note is debt that can convert into shares under specified conditions. The principal is the amount lent; interest generally accrues on that amount. The maturity date is when the note becomes due under its terms, unless conversion or another agreed outcome occurs.

A qualified financing is a funding event that meets the note’s conversion conditions, potentially including a minimum amount raised. The note specifies whether principal and accrued interest convert, what price applies, and what happens at maturity or a sale. Repayment, conversion, extension, and investor elections vary by document; debt status doesn’t guarantee recovery.

At Hustle Fund, our co-founder and general partner Elizabeth Yin captured the distinction in a 2021 thread: “SAFEs != convertible notes.” The symbol means “does not equal.” Interest, maturity, and event provisions make that distinction concrete.

Special purpose vehicle (SPV)

A special purpose vehicle (SPV) pools investors’ money into a separate legal entity that holds an investment. You own an interest in the vehicle rather than directly holding the startup’s security.

The vehicle’s documents add another layer of rights, expenses, and distribution rules. Carried interest, or carry, is a manager’s agreed share of investment profits; management fees pay for managing the vehicle. Our SPV and fee guide explores those costs in more detail.

These are the kinds of distinctions we work through in deal-review conversations.

Price terms: valuation, caps, and discounts

Pre-money and post-money valuation

In a priced round, pre-money valuation is the agreed equity value before the new investment. Post-money valuation includes that investment. These figures describe a financing price, not cash you can withdraw or a guaranteed sale value.

In a hypothetical, simplified priced round, a $4,000,000 pre-money valuation plus $1,000,000 of new cash gives a $5,000,000 post-money valuation. The new investors collectively buy 20%: $1,000,000 divided by $5,000,000. This assumes no SAFE or note conversions, pool changes, or other transaction adjustments.

Valuation cap

A valuation cap sets a ceiling on the valuation used in a convertible instrument’s conversion-price formula. A lower conversion price produces more shares for the same investment. The cap isn’t a limit on how valuable the company can become, and it isn’t the company’s current priced-round valuation.

The cap’s pre-money or post-money basis matters. With a pre-money SAFE, other convertible funding can affect the ownership resulting from your check. A YC post-money cap includes SAFE funding in its capitalization calculation, making cap-based ownership easier to calculate before the new priced-round money enters.

“Post-money SAFE” does not mean after every part of the next financing. YC’s SAFE User Guide distinguishes SAFE funding from new priced-round funding.

The cap-only form’s capitalization definition in section 2 generally excludes financing-related option-pool increases from Company Capitalization, the share count used in the cap-price formula. It includes an increase to the extent the form’s promised, ungranted options exceed the unissued pool before that increase.

A hypothetical, simplified example: a $25,000 investment at a $2,500,000 post-money cap has a 1% cap-based ownership ratio. This assumes an unmodified YC US cap-only post-money SAFE, conversion at its cap price, and the form’s Company Capitalization definition, including the promised-option exception. That ratio is measured before dilution from the new priced-round investment and the portion of any financing-related pool increase excluded by that definition.

You don't own issued shares at signing, and 1% isn't a permanent stake. If the financing price produces more shares than the cap formula, the form uses that outcome instead.

Discount and conversion price

A discount reduces the share price used when an instrument converts. In a hypothetical, simplified conversion, a 20% discount on a $1 new-investor share price gives an $0.80 conversion price. The discount is a price reduction, not a 20% ownership stake.

Y Combinator offers separate US SAFE form versions: cap-only, discount-only, and uncapped most-favored-nation. Other forms can contain both a cap and a discount. A document may use whichever produces the lower conversion price, rather than applying both reductions together. The signed formula determines the result.

Ownership changes: dilution and the option pool

Dilution

Dilution is a reduction in your percentage ownership as the relevant share count grows. A financing, convertible-security conversion, or equity-compensation increase can cause it. Your number of shares can stay the same while your percentage falls.

A smaller percentage doesn’t establish whether the investment gained or lost value. The company’s value, your share rights, and eventual sale proceeds all matter.

Employee option pool and vesting

An employee option pool reserves shares for compensation grants. Its size varies with the hiring plan and financing terms. An option grants the right to purchase shares under specified conditions; vesting determines when a founder or employee earns the right to retain shares or exercise an award.

A pool increase can be included in pre-financing capitalization when the new investors’ share price is calculated. In that structure, the increase dilutes existing holders rather than the new investors. Cooley’s option-pool explanation shows why the timing and denominator matter.

An existing pool already counted in fully diluted ownership differs from newly added capacity. Grants from that counted pool don’t create the same additional fully diluted dilution as expanding it. Adding a financing percentage to a pool percentage without knowing their measurement bases can give the wrong answer.

Anti-dilution provisions

Anti-dilution provisions can adjust preferred stock’s conversion price after certain lower-priced issuances. They address specified pricing events, with formulas and exclusions. They don't prevent all ownership dilution, and they differ from a right to invest more money.

Investor rights: participation and contractual protections

Pro rata rights

Pro rata rights give you the option to buy a defined portion of a qualifying financing. Exercising them requires additional capital. They can help maintain ownership against the issuance they cover, but don't remove every source of dilution.

The agreement defines the covered rounds, calculation, eligibility thresholds, notice process, and expiry. YC’s optional pro rata side letter covers the equity financing in which the SAFE converts. It terminates at that financing’s initial closing, or earlier upon a liquidity event or shutdown, called a dissolution event. It doesn't grant access to every future round.

Having the right and deciding to use it are separate decisions. As Elizabeth Yin writes about follow-on investing, “your position on these questions really depends on the exact nature of your situation.” Compare another investment in that company with the other uses of your remaining startup budget.

Information rights and protective provisions

Information rights entitle covered investors to specified reports, such as financial statements or budgets. Protective provisions require approval from a specified investor class or group for certain company actions. Neither automatically gives each small investor a personal veto, board seat, or unrestricted access to company records.

Most-favored-nation (MFN) provision

A most-favored-nation (MFN) provision allows an investor to adopt certain later-issued terms within its contractual scope. It doesn't cover every better deal another investor receives.

YC’s uncapped MFN form requires notice of qualifying subsequent convertible securities. The investor has 10 days after receiving that notice to elect the amendment in writing. The form then adopts that instrument’s terms as a package; it doesn't let you cherry-pick a cap while keeping every other existing term.

The form excludes specified securities and ancillary agreements. A later priced equity round or another investor’s separate side letter doesn't automatically reset your SAFE. Other MFN provisions can have different scope and procedures.

Exit terms: liquidation preferences and payment priority

Liquidation preference

A liquidation preference gives preferred holders priority over common holders for specified distributions, often including a company sale. A 1x preference generally bases that priority amount on the original investment; a 2x preference uses twice that amount. Neither guarantees the company has enough distributable proceeds to pay it.

Participation is a separate term. As-converted means calculating ownership as if preferred shares had converted to common. Latham & Watkins distinguishes three preference structures:

• Non-participating preferred: The holder takes the preference or the payout available by converting to common, whichever is more favorable under the documents.
• Participating preferred: The holder takes the preference, then shares in the remaining proceeds on an as-converted basis.
• Capped participating preferred: Participation stops at a stated payout cap, subject to the holder’s conversion rights.

For a hypothetical, simplified single-deal distribution at an assumed closing on December 31, 2030, one preferred class invested $1,000,000 and holds 20% on an as-converted basis. There is $3,000,000 in cash available to shareholders. Assume no debt, dividends, other preferences, follow-on investments, or ownership changes. These are fully realized gross payouts before fees, carry, and taxes, not projections.

With 1x non-participating preferred, that class receives $1,000,000, because converting would pay only $600,000. With uncapped 1x participating preferred, it receives $1,000,000 plus 20% of the remaining $2,000,000, or $1,400,000. Identical ownership produces different payouts because the share rights differ.

Seniority, preference stack, and exit waterfall

Seniority is the order in which claims receive payment. Pari passu means specified claims rank equally. A preference stack is the collection of preferred claims across financing rounds; an exit waterfall calculates distributions through those priorities.

Being an angel investor doesn't automatically put you at the bottom. The security you hold and its agreed seniority determine your position. Debt and other creditor claims can reduce the proceeds available to shareholders; senior preferred claims can leave junior preferred and common holders with little or nothing.

A company's sale price or valuation increase therefore doesn't translate directly into your investment multiple. A preference also can't protect you from every business failure.

Questions to bring to the deal review

Use the vocabulary to make the proposed transaction specific:

1. What am I purchasing? Identify the security, exact form, modifications, and whether you invest directly or through a vehicle.
2. What triggers conversion or payment? Identify financing thresholds, maturity terms, liquidity provisions, payment timing, and which share class you receive.
3. How is ownership calculated? Identify the pre-money or post-money basis, included convertibles, existing pool, pool increase, and the point at which percentages are measured.
4. Which rights do I receive? Identify the signed agreement granting each right, its scope, notice deadlines, and termination conditions.
5. What gets paid ahead of me? Identify debt, preference multiples, participation, seniority, and distribution costs.

Qualified independent legal, tax, and financial advisers can review how those provisions work together in your actual documents. Community learning helps you arrive at that conversation with clearer questions.

Our Angel Squad community combines investing education, curated deal reviews, and peer conversations so you can practice applying these concepts. Apply to learn alongside other aspiring and active angels.

This is educational information, not legal, tax, investment, accounting, or valuation advice. Startup investments are speculative, illiquid, and long-term; most bets may fail, and you can lose your entire investment. All calculations are hypothetical and simplified, not forecasts. Outcomes depend on the governing documents, cap table, valuation policy, financing and exit timing, debt, fees, carried interest, and taxes. Past results and current valuation marks don't guarantee future results. Seek independent review of the governing documents and your circumstances from qualified legal, tax, and financial professionals.