Joiners: No Joiners Today. Leavers: Studio Retail Group has left the Main Market after entering administration. What’s cooking in the IPO kitchen? URA Holdings, a London based mining exploration and development company, intends to list on the Main Market (Standard). URA, a former AIM-listed company, is refinanced and ready for listing as an African focused mineral exploration company. The Company’s purpose is to seek unique, value-enhancing opportunities in minerals as a project generator includ ....