TEDx events are capped at 100 attendees to promote an intimate experience where people can easily engage in conversation with one another.
However, individuals who have attended an official TED conference in person may organize an event with more than 100 attendees. Attending one or multiple TEDx events does not qualify for hosting an event with more than 100 people -- the primary license holder (the individual whose name is on the application form) must have attended a TED conference.
There are no exceptions to the 100 person rule. As an alternative, consider hosting a webcast of your event to an additional 100 guests. Check out our TEDx Organizer Guide for more information about audience selection and alternative viewing options.