Glossary — captable
Acceleration
Also known as: single-trigger acceleration · double-trigger acceleration
Acceleration provisions speed up vesting on a change of control — single-trigger accelerates on the acquisition itself, double-trigger requires both an acquisition AND termination.
How it works
Standard founder/executive packages include double-trigger acceleration: if the company gets acquired AND the executive is fired without cause within 12 months, their unvested shares immediately vest. Single-trigger (acceleration on acquisition alone) is harder to get and reserved for founders. Investors prefer double-trigger because it keeps the acquired team in place.