Amthor International is the the nation's largest and most diverse tank truck manufacturer. Located in an 86,000 square foot facility in Gretna Virginia, Amthor International employs over 100 people spread across two separate shifts. The company is now in its fourth generation of family ownership and is stronger than ever. We also offer delivery of our product through our tank delivery division, W. M. Amthor Trucking and a financing of our units through our own Horizon Capital.