Stem Inc – US85859N1028
To qualify for ISA inclusion, a share has to be officially listed on a recognised stock exchange (see ISA Guidance https://www.gov.uk/guidance/stocks-and-shares-investments-for-isa-managers#shareinv) or, from 5 August 2013, admitted to trading on a recognised stock exchange in the European Economic Area (EEA) or the UK.
From the initial research we have carried out, this share (common shares/equity) appears to have a listing on the NYSE (ticker symbol STEM) and also appears to be admitted to trading on the Borse Frankfurt Stock Exchange (see links below) therefore, on that basis, the shares should qualify for stocks & shares ISA inclusion.
STEM INC. DL-,0001 Equity | A3CN1T | US85859N1028 | Share Price (boerse-frankfurt.de)