Although more than two dozen different Chinese brand drywall boards are thought to be possibly installed in homes in the USA (per labeling by the Multi District Class Action Lawsuit- MDL), the ones we have most often found in our area of Alabama indentified as of Chinese origin are: Knauf (several brand variants), Venture, Prowall, and an unmarked board of Chinese origin.
Some exceptions are occasionally found, and recognizing non-labeled boards that are Chinese drywall is one of the challenges with a visual inspection. Another challenge is recognizing domestic drywall boards in order to rule them out as not being of Chinese drywall origin is another challenge. The MDL indentifies just 4 brands as being non-Chinese in origin. However, we have found several dozen different boards that identify themselves as made by companies in the USA.