- Stock Option
- The right, but not the obligation, to purchase a specified number of company shares at a fixed price within a defined period.
- Exercise Price (Strike Price)
- The per-share price at which the option holder may purchase shares, set at fair market value on the grant date.
- Grant Date
- The date on which the company's board or compensation committee formally approves and awards the option grant.
- Vesting Schedule
- The timeline over which an employee earns the right to exercise their options, typically expressed as a cliff plus monthly ratable vesting.
- Cliff
- The minimum service period β typically 12 months β that must pass before any portion of a grant vests.
- ISO (Incentive Stock Option)
- A stock option that qualifies for favorable tax treatment under IRC Section 422, available only to employees and subject to holding-period requirements.
- NSO (Non-Qualified Stock Option)
- A stock option that does not meet ISO requirements; the spread at exercise is taxed as ordinary income, and NSOs can be granted to employees, advisors, and contractors.
- Expiration Date
- The date after which unexercised options lapse permanently β typically 10 years from the grant date, shortened to 90 days after termination in most plans.
- Equity Incentive Plan
- The board- and stockholder-approved plan document that authorizes the company to issue options and other equity awards, setting the total option pool and grant rules.
- 409A Valuation
- An independent third-party appraisal of the company's common stock fair market value, required by IRS Section 409A to set a defensible exercise price for NSOs and ISOs.