Itaconix PLC (LON:ITX) surged on Wednesday as it prepared to begin trading its shares on the US OTCQB market under the symbol ITXXF.

W Resources PLC (LON:WRES) has raised US$5mln to provide extra working capital as its La Parrilla tungsten and tin mine in Spain is now fully up and running on a 24-hour basis.

Augmented and virtual reality investment fund Sure Ventures PLC (LON:SURE) got a boost from the rising value of entertainment pod group Immotion in its latest six months.

Open Orphan PLC (LON:ORPH) said its Venn Life Sciences arm is to provide a US firm with assistance in the filing a European Medicines Agency application for orphan drug designation for its product.

Salt Lake Potash Ltd (ASX:SO4) (LON:SO4) (FRA:W1D) (OTCMKTS:WHELF) has signed an agreement with leading fertiliser company HELM AG for the sale of premium sulphate of potash from its Lake Way Project.

Thor Mining PLC (LON:THR ASX:THR) has received data that suggests gold mineralisation at Kapunda in Australia might be greater than originally thought.

Premier African Minerals Limited’s (LON:PREM) RHA tungsten mine in Zimbabwe will be fully connected up to an electricity supply early in 2020 after delivery of equipment by ZESA, the state power company.

Explorer Union Jack Oil PLC (LON:UJO) and natural resources investor Reabold Resources PLC (LON:RBD) provided separate updates on a Yorkshire onshore oil and gas fields that has all the hallmarks of a North Sea discovery in terms of its scale.

United Oil & Gas PLC (LON:UOG) says latest drill results from the assets in Egypt it will buy from Rockhopper Exploration PLC (LON:RKH) next year underline their quality.

Enteq Upstream PLC (LON:NTQ) has been granted a full patent by the UK Patent Office for PowerHop, a system designed to wirelessly log measurements during well drilling.

Rainbow Rare Earths Limited (LON:RBW) says drilling at the Kiyenzi area of its Gakara project in Burundi contains “greater widths of mineralisation” than initially expected.

Rockfire Resources PLC (LON:ROCK) has hit high-grade gold during drilling at its Plateau gold deposit in Queensland, Australia.

Columbus Energy Resources PLC (LON:CERP) has drawn an additional US$1.5mln under a funding agreement with investment manager Lind Partners for the Saffron well in Trinidad.

Europa Metals Ltd (LON:EUZ) has revealed “very encouraging” grades of lead, zinc and silver from first metallurgical tests at its Toral project in north-west Spain.

Ncondezi Energy Limited (LON:NCCL) has tweaked the timetable to submit the data for the tariff agreement covering its coal-fired power station project in Tete, Mozambique.

Vast Resources PLC (LON:VAST) said it intends to unlock the first tranche of cash from a recent US$13.5mln bond financing deal before the end of the month.

IP group IQ-AI Ltd (LON:IQAI) has put its Stonechecker software business up for sale to free up resources for its medical imaging products.