Aragats Perlite OJSC

Nareg Hartounian August 2, 2021

Nor Cal Perlite, Inc. South – Bakersfield, CA

Justin Clarke March 29, 2021

SR Minerals, Inc.

Patrick Cheetham September 13, 2018

ACCIMIN SA DE CV

Pablo Rauh Hain June 8, 2018

Zulkuf Yetiskin

Zulkuf Yetiskin May 24, 2018

Aegean Perlites SA

Theodoros Govdelas April 30, 2018

Pull Rhenen b.v.

Rene' van der Mark February 28, 2018

Perlit-92 Kft.

Dr. Geza Farkas February 28, 2018

Knauf Performance Materials GmbH

Werner Schwiebacher February 28, 2018

Nor Cal Perlite, Inc.

Justin Clarke February 28, 2018

P.V.P. Industries, Inc.

pvpind February 28, 2018

Sun Gro Horticulture Canada, Ltd., Agawam, MA, USA

Bill King February 28, 2018

Supreme Perlite Company

Frank Petterson February 28, 2018

TERMOLITA SAPI DE CV

Ignacio Lopez Barro February 28, 2018

Whittemore Company, Inc., Lawrence, MA, USA

Jeffrey Sheehy February 28, 2018

Imerys Filtration and Performance Additives, Paris, France

Olivia Persyn February 28, 2018

Industrial Processors Limited, Auckland, New Zealand

Matthew Malaghan February 28, 2018

IPM Industrial Mining S.A.

Orca Kirker February 28, 2018

Ausperl Pty Limited, New South Wales, Australia

Matthew Malaghan February 28, 2018

Cevahir Perlite

Ibrahim Ekrem Cevahir February 28, 2018

Cornerstone Ind. Minerals Corp.

Bruce Addington February 28, 2018

Dicalite Management Group

Matt Goecker February 28, 2018

Genper Group of Companies

Turgay Comert February 28, 2018

Hess Perlite

Jake Hess February 28, 2018