Symphony Technology Group-backed Cadmium, an events and learning platform, completed the acquisition of EventRebels, an events and registration software company. Financial terms were not disclosed. “We are thrilled to be a part of Cadmium’s platform of world-class event experiences. Our event and registration software will enrich the Cadmium ecosystem enabling an all-in-one solution from pre-event activities such as registration to event production and post-event continual learning," K.C. Hopson, EventRebels Founder and CEO.