International Securities Identification Numbers (ISIN) (including GEM and Trading Only Stocks) 

In accordance with Association of National Numbering Agencies regulation ISO 6166, HKEX will only assign ISINs for securities of which the issuing companies are registered in Hong Kong.

ISINs assigned by HKEX

For securities of which the issuing companies are registered outside Hong Kong, their ISINs are assigned by the respective numbering agencies of their country of incorporation.

ISINs assigned by Other Numbering Agencies