Hi @Excel Benedict.Cruz, you can use a screener to form the basis of your query to get all the instruments. See Excel Screener for help on screener filters.

For e.g. to get all the instruments listed on NYSE:

>>> df, err = ek.get_data(instruments = "SCREEN(U(IN(Equity(active,public,primary))), IN(TR.ExchangeMarketIdCode,""XNYS""), CURN=USD)", fields = ['TR.CommonName', 'TR.ExchangeName'])

>>> df.head() 
  Instrument            Company Common Name                  Exchange Name
0       FN.N                       Fabrinet  NEW YORK STOCK EXCHANGE, INC.
1     GCAP.N      GAIN Capital Holdings Inc  NEW YORK STOCK EXCHANGE, INC.
2      HPP.N  Hudson Pacific Properties Inc  NEW YORK STOCK EXCHANGE, INC.
3      OAS.N            Oasis Petroleum Inc  NEW YORK STOCK EXCHANGE, INC.
4      ENV.N                  Envestnet Inc  NEW YORK STOCK EXCHANGE, INC.