[3] A German American, Emil Winter, acquired the mining rights and founded the "Austro-American Magnesite Company" (later Radex Austria).

[3] Then in 1991 RHI AG acquired Veitscher Magnesitwerke Actien-Gesellschaft, a rival business founded by Carl Spaeter in Germany in 1889.

[3] Next, in 1995, RHI AG acquired a majority stake in its previous competitor Didier-Werke AG (founded by Friedrich Ferdinand Didier in 1834 when he acquired a brick and lime firing plant near Szczecin in Poland, and established the factory "Chamottefabrik F. Didier" in Podjuchy, thus becoming one of the first manufacturers of refractory bricks in Germany).

[3] In 2004 the company was required to pay a civil penalty of $650,000 for failing to undertake asbestos remediation at a plant in Marelan, Quebec, Canada which it had been ordered to sell to Resco Products, Inc. in 1999.

[8] Additionally, the RHI Magnesita shares can still be traded via the global market segment of the Vienna Stock Exchange.