- Aegean Perlites SA
- Ausperl Pty Ltd
- Azer Perlite Corporation
- Bergama Mining Perlite
- Cornerstone Industrial Mineral Corporation USA
- Mianeh Prlite Expanding Co. Ltd
- Profiltra BV
- Saudi Perlite Industries
- Supreme Perlite Company
- Termolita
- Coxmin Minerals Ltd
- IMERYS
- Yanxi Minerals Co. Ltd