I have list of 1500 companies along with their symbols.
Example : (Randstad Holding , RANJF)
Most of the symbols(apprx 80%) are correct. Now I need their RIC codes to retrieve financial data from TRKD-Financial-API.
https://www.trkd.thomsonreuters.com/SupportSite/TestApi/Op?svc=Fundamentals_1&op=GetFinancialStatementsReports_1

Could you please help me in getting the RIC codes or any other method to retrieve the financial data for these companies.