Idaho's Hecla Mining Company explores, develops, and markets gold, silver, and base metals in the US and Mexico.

Calumet Specialty Products, a US-based mining company, specializes in manufacturing lubricants, solvents, waxes, and fuels.

Leading American gold and copper producer with significant mining operations.

Solitario Resources Corp.: Global provider of zinc mining and exploration services.

DynaResource, Inc.: A mineral investment firm exploring and developing gold and silver properties in Mexico and Nevada.

W&T Offshore, Inc.: An independent oil and gas producer primarily operating in the Gulf of Mexico.

Smartfren, an Indonesian telecom company, operates a 4G LTE network and is the fifth-largest wireless carrier in Indonesia.

North Texas Energy, Inc.: A non-traditional oil and gas producer, specializing in well re-entry and re-working.

JCDecaux SE: A global outdoor advertising firm specializing in transport, billboard, and street furniture ads.

Evolution Petroleum: A Texas-based oil and gas producer, enhancing production with specialized technology.

U.S. Gold Corp. is a U.S.-based mining company specializing in gold exploration and development.

Limbach Holdings, Inc. delivers expert HVAC, electrical, and plumbing solutions for commercial and institutional buildings.

Tronox Limited: Mining titanium and inorganic chemicals.

Ovintiv: A leading American energy company, producing oil, natural gas liquids and gas.

Houston-based Adams Resources & Energy, Inc. markets crude oil, natural gas, and liquid chemicals. Founded in 1947, now employs over 800.

Hallador Energy: A leading coal producer and transporter, exploring oil and gas reserves in the Illinois Basin.

Warrior Met Coal, Inc.: Global provider of metallurgical coal for the steel industry.

American Aerospace Company: Global provider of comprehensive solutions for aerospace, defense, and semiconductor industries.

Premier energy company with diversified assets for sustainable returns.

Global chemical company specializing in carbon compounds, chemicals, and treated wood products.

Rogue One: A publicly traded company, capitalizing on the evolving alcohol beverage market.

Tri-Rail: An electrical manufacturing firm committed to developing efficient transportation networks.

Nextstar Media Group: A leading US-based local TV and media company, offering content, advertising, and entertainment.

CNX Resources: A leading US-based natural gas company, specializing in exploration, production, and service.

Oscar Health is a public health insurer and healthcare technology company offering health plans and +Oscar solutions.