Joiners: No Joiners Today. Leavers: Filta Group shares have ceased trading on AIM following a takeover by AIM quoted peer Franchise Brands (FRAN.L) What’s cooking in the IPO kitchen? According to Proactive Investors, SpectrumX Holdings Ltd, which is tapping the healthcare and commercial potential of hypochlorous acid, is considering a London listing. It is understood the group has submitted its prospectus to the London Stock Exchange ahead of a float in late spring, targeting a valuation of arou ....