Weekly round-up of the latest corporate announcements, including a recommended firm offer for Stellar Diamonds plc by Newfield Resources Limited, a formal sale process by Vernalis plc, a possible offer for NEX Group plc by CME Group, Inc., IPOs by The SimplyBiz Group plc. Performatrix plc, Kore Potash plc, and Gore Street Energy Storage Fund plc, secondary offers by Oxford Biomedica plc, PureTech Health plc, Yu Group plc and Diurnal Group plc, a demerger by Prudential plc, a reduction of capital announced by Aggregated Micro Power Holdings plc, a special dividend proposed by Morrison (Wm) Supermarkets plc, a Class 1 transaction by GKN plc, and related party transactions by Flowtech Fluidpower plc, PureTech Health plc and Tavistock Investments plc. 16 companies announced the date of their AGM.