1. BHP Billiton: This Australian-based mining company is one of the largest diversified natural resources companies in the world, and its business involves oil, natural gas, iron ore, coal and metals.
2.RioTinto: This British-based mining company is one of the largest metal and mining companies in the world, and its business involves iron ore, aluminum, copper, diamonds, gold and industrial minerals.
3.AngloAmerican: This British-based mining company is one of the world's leading diversified mining groups, and its business involves platinum, diamonds, copper, nickel, iron ore and manganese.
4. Glencore: This Swiss-based mining company is one of the largest commodity traders and producers in the world, covering metals and minerals, energy products and agricultural products.
5.Freeport-McMoRan: This American-based mining company is one of the largest producers of copper, gold and molybdenum in the world, and its business involves mining, oil and natural gas.
6.NewmontMining: This American-based mining company is one of the largest gold producers in the world, and its business involves gold, copper, zinc and silver.
7.BarrickGold: This Canadian-based mining company is one of the largest gold producers in the world, and its business involves gold, copper, zinc and silver.
8. Antofagasta: This Chilean-based mining company is one of the largest copper producers in the world, and its business involves copper, molybdenum and silver.
9. Vale: This Brazilian-based mining company is one of the largest producers of iron ore, nickel and manganese in the world, and its business involves iron ore, aluminum, copper and coal.
10.South 32: This Australian-based mining company is one of the largest metal and mining companies in the world, and its business involves aluminum, manganese, nickel, zinc and coal.
These companies don't specialize in producing small metals, but their business involves all kinds of metals and mineral resources, including small metals. Investing in the stocks of these companies can give you diversified investment opportunities in the small metal market. Please note that investing in the stock market is risky, and you should consult professionals before making investment decisions.