Association of Event Organisers Ltd (AEO) is the trade body representing companies which conceive, create, develop or manage trade and consumer events. It is run by its members for the benefit of its members through an elected council of representatives, specialist working groups and a fulltime secretariat.

AEO has two sister associations, AEV and ESSA, whose members come from the event venue and supplier communities. AEO works in partnership with its sister associations on a number of initiatives including research, cross association working groups and lobbying. This enables the event community to come together as one voice, responding to a range of opportunities or issues into which all sides of the industry have an important input.