PRIVATE
accounting firms
advisory firms
art collectors
banking departments
consulting companies
family offices
foundations
investment boutiques
law firms
mining -precious metals
oil & gas exploration companies
petroleum companies
private equity firms
professional service firms
refineries -gold
refineries -crude oil, petroleum products
real estate investors
shipping, trade & transport
shipyards
strategy firms
waste management  -recycling

INSTITUTIONAL
central banks
development agencies
development funds
distressed capital funds
EU institutions
finance & development ministries
funds of funds
government departments
hedge funds
insurance companies
investment banks
mutual funds
national investment authorities
non-government organizations (NGO's)
non-profit organizations
pension funds
real estate investment trusts (REIT's)
sovereign wealth funds
special purpose acquisition companies (SPAC's)
UN Institutions
world bank