- 3 Proton Lithium, Inc.
- A1 Lithium Inc.
- Alabama Mining Association
- Alaska Miners Association
- Alliance Resource Partners, L.P.
- Alpha Engineering Services
- Alpha Metallurgical Resources
- Ambler Metals, LLC
- AMCAST
- American Coal Council
- American Consolidated Natural Resources
- American Exploration & Mining Association
- American Industrial Mining Museum
- American Rare Earths
- Americas Mining Corporation
- AngloGold Ashanti North America
- Ansul Incorporated
- Antraquip Corporation
- Aon
- Aquatech
- ARIPPA
- Arizona Metals Corp
- Arizona Mining Association
- Ashbury Stickland Mfg
- Atlantic Carbon Group Inc.
- Austin Powder Company
- Axis Communications
- Barr Engineering Company
- Barrick Mining Corporation
- Bayer U.S. – Crop Science
- Bechtel
- Becker Mining
- Bel-Ray Oil
- BKT USA Inc.
- Black Cat Wear Parts
- Bonfiglioli USA
- Brelko Conveyor Products, Inc.
- Bridgestone Americas Inc.
- C.E. Niehoff & Co.
- Calibre Mining Corp
- Cameco Resources, Inc.
- CAPCVENTURES LLC
- Capstone Copper
- Caterpillar Inc.
- Cincinnati Mine Machinery Co.
- Civil & Environmental Consultants, Inc.
- Coeur Mining, Inc.
- Colorado Mining Association
- Core Natural Resources, Inc.
- CR Mining Equipment USA LLC