NorthWest Biotherapeutics Inc (NWBO)

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As per Google AI:

The SEDOL code B018882 is the identifier for Northwest Biotherapeutics Inc., a biotechnology company primarily traded on the OTC (Over-the-Counter) market under the ticker symbol NWBO.
Security Details

Company Name: Northwest Biotherapeutics Inc.
SEDOL Code: B018882.
Primary Ticker: NWBO.
Asset Class: Equity (Common Stock).

Looks like you were wrong on that one.