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ARTICLE · 28 JANUARY 2026

Single Vs. Double-Trigger Vesting Acceleration: What Founders And Executives Should Negotiate Before An Exit

As a founder of a life sciences or other technology company, you know early revenue rarely sustains the business as it moves from initial concept to a working product.

United StatesCorporate/Commercial Law

Summary for Founders

  • Vesting acceleration decides what happens to your unvested equity when the company is sold
  • Single-trigger acceleration can vest equity at closing while double-trigger usually requires a second event after closing
  • The outcome depends on how your equity plan, award agreements and employment terms define change of control, Termination for Cause and Termination for Good Reason
  • Post-close integration changes like title, reporting lines and responsibilities often decide whether the second trigger is met
  • Small drafting gaps and mismatched definitions can change the result across stock options, restricted stock units ("RSUs") and other awards

Why Vesting Acceleration Becomes a Deal Issue

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