- Option Pool
- The total number of shares reserved by a company for issuance under its equity incentive plan, expressed as a percentage of fully diluted shares outstanding.
- Incentive Stock Option (ISO)
- A type of employee stock option that qualifies for favorable US tax treatment β no ordinary income tax at exercise β if specific IRS holding and eligibility requirements are met.
- Non-Qualified Stock Option (NSO)
- A stock option that does not qualify for ISO tax treatment; the spread at exercise is taxed as ordinary income for the recipient and is deductible by the company.
- Vesting Schedule
- The timeline and conditions under which an employee earns the right to exercise granted options, commonly structured as a 4-year schedule with a 1-year cliff.
- Cliff Vesting
- A vesting structure in which none of the options vest until the employee completes a defined initial period β typically 12 months β at which point a portion (often 25%) vests at once.
- Exercise Price (Strike Price)
- The price per share at which a plan participant may purchase stock when exercising an option, set at no less than fair market value on the grant date for ISOs.
- Fair Market Value (FMV)
- The price at which a share of company stock would change hands between a willing buyer and seller, determined by a 409A valuation for private companies.
- 409A Valuation
- An independent appraisal of a private company's common stock fair market value required by US tax law to set defensible ISO exercise prices.
- Acceleration
- A plan provision that causes unvested options to vest early, triggered by events such as a change of control, termination without cause, or double-trigger conditions.
- Post-Termination Exercise Period
- The window after an employee leaves the company during which they may still exercise vested options, commonly 90 days for voluntary resignation and longer for death or disability.
- Dilution
- The reduction in existing shareholders' ownership percentage that occurs when new shares are issued β including shares issued on option exercise.