Events. US exhibition organiser Emerald Expositions is acquiring Total Tech Summit from EH Media, as well as a group of complementary tech events, for US$28m. The Summit is a three-day event which this year takes place November 7-9 in Pittsburgh. Emerald claims to be the largest operator of business-to-business trade shows in the United States by net square feet. It currently operates more than 55 trade shows. In 2017, the company claims its events “connected over 500k global attendees and exhibitors and occupied over 6.9m net square feet of exhibition space”.