Rockwool

Rockwool is owned by ROCKWOOL A/S, headquartered in Denmark. No. The ultimate owner of Rockwool, ROCKWOOL A/S, is headquartered in Denmark, not in the United States.

ROCKWOOL A/S (also known as ROCKWOOL Group) is the world's leading manufacturer of stone wool products, specializing in building insulation, industrial acoustics, and horticultural substrates.