Meaning
Contractual provisions in stock purchase or option agreements speed up earn-out schedules for unvested equity upon specific triggering events such as corporate acquisition or involuntary termination. Including vesting acceleration clauses alters standard four-year earn-out schedules to protect equity holders from losing equity when company ownership changes hands. The mechanism operates inside founder and executive equity contracts, ceasing to function once shares vest completely or agreement terms expire.
Trigger Structure
Single-trigger acceleration grants automatic vesting immediately upon a change of corporate control. Double-trigger acceleration requires both corporate acquisition and subsequent termination without cause within a specified timeframe. Investors prefer double-trigger arrangements to ensure essential executives remain with the acquiring entity post-acquisition.
Acquirer Retention
Unvested equity serves as retention collateral for acquiring companies purchasing early stage startups. Full single-trigger acceleration leaves acquirers unable to retain core personnel who receive immediate liquidity upon deal completion. Acquisition purchase prices are frequently discounted when broad single-trigger acceleration rights exist across executive teams.
Golden Parachute
Federal tax regulations under Section 280G penalize excess parachute payments triggered by change of control provisions. Accelerated vesting values count toward tax penalty limits when calculating total executive severance compensation. Shareholder vote waivers can exempt private companies from excise tax penalties associated with accelerated equity vesting, provided disclosure requirements are met prior to closing the acquisition deal.
