1. 3M Company
2. ACH Foam Technologies Inc.
3. Anco Products Inc.
4. Aspen Aerogels Inc.
5. Big Sky Insulations Inc.
6. DuPont de Nemours Inc.
7. Huntsman Corporation
8. Johns Manville by Berkshire Hathaway Company
9. Knauf Insulation d.o.o.
10. Morgan Advanced Materials PLC
11. Owens Corning
12. Rockwool International A/S
13. Saint-Gobain S.A.
14. Scott Industries Ltd.
15. Triumph Group