There are at least 35 bullion banks active in the global GOLD market

Who are these Bullion Banks?
There are at least 35 bullion banks active in the global GOLD market,
and arguably more depending on how one defines an active and important bullion bank.

The LBMA membership system[7] is useful in classifying these banks.
First there are the 13 market making members of the LBMA.
These banks are
BNP Paribas, Citibank, Goldman Sachs International,
HSBC, ICBC Standard Bank,
JP Morgan Chase, Merrill Lynch International,
Morgan Stanley & Co
International, Société Générale, Standard Chartered Bank,
The Bank of Nova Scotia – Scotia Mocatta,
Toronto-Dominion Bank and UBS.

In addition to these market makers, full member bullion banks of the LBMA include
Australia & New Zealand Banking Group (ANZ),
Natixis, Credit Agricole CIB, Bank of China, Credit Suisse,
Macquarie Bank,
Royal Bank of Canada, Bank of Montreal,

Commonwealth Bank of Australia,
Westpac Banking Corp,
Mitsubishi Corp International (Europe),
Sumitomo Corporation Global Commodities, and German landesbanks Bayerische Landesbank and Landesbank Baden-Wurttemberg,
as well as German bank Commerzbank which operates its bullion banking activities from Luxembourg.
Commerzbank claims to be one of the top 3 bullion banks in the world.
source
https://www.bullionstar.com/gold-university/bullion-banking-mechanics#heading-7