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Please contact the datastream support team directly via MyRefinitiv to verify how to download private firm financial data with Datastream.
I checked and found that I can use a PermID with Datastream Webservice by enclosing it with angle brackets.
I am trying to download some financial data (e.g. sales, profits, taxes) for US based private firms from 2003 until 2019. However, the identifier for private firms (Perm.ID) does not return any results. Has anyone any idea on how to get this data?