1. Butong AB
2. Dupont Lightstone
3. Fapinex LLC
4. Italcementi S.p.A. by HeidelbergCement Group
5. Laticrete International Inc.
6. Lightweight Composite Technologies GmbH
7. Litracon Ltd.
8. Lucem GmbH
9. Pan-United Corporation Ltd.
10. StoneCast
11. Stylepark AG
12. Van Delft Westerhof