Nor Cal Perlite, Inc.

Justin Clarke February 28, 2018

Nordisk Perlite ApS

Jannick Knudsen February 28, 2018

P.V.P. Industries, Inc.

pvpind February 28, 2018

Perlite Canada, Inc., Lachine

Richard Barabe February 28, 2018

Showa Chemical Industry Co., Minato-ku, Tokyo, Japan

Kenzo Ishibashi February 28, 2018

Silbrico Corporation, Hodgkins, IL, USA

Steve Garnett February 28, 2018

Supreme Perlite Company

Frank Petterson February 28, 2018

Temperlite Insulation Sdn Bhd

Nik Khairil February 28, 2018

TERMOLITA SAPI DE CV

Ignacio Lopez Barro February 28, 2018

Tetraquimica Industria E Comercio Ltda

Claudio Ferranda February 28, 2018

The Schundler Company, Edison, NJ, USA

Craig McKean February 28, 2018

Whittemore Company, Inc.

Jeffrey Sheehy February 28, 2018

IPM Industrial Mining S.A.

Orca Kirker February 28, 2018

Imerys Filtration and Performance Additives, Paris, France

Olivia Persyn February 28, 2018

Infigro Natural Technologies

Anita Mulqueeny February 28, 2018

Ausperl Pty Limited, New South Wales, Australia

Matthew Malaghan February 28, 2018

Aztec Perlite Company, Inc.

Anna DiNardo-Johnson February 28, 2018

Carolina Perlite Company, Inc.

Linda Chirico February 28, 2018

Cevahir Perlite

Ibrahim Ekrem Cevahir February 28, 2018

Dicalite Management Group

Matt Goecker February 28, 2018

EP Minerals, Blair, NE, USA

Julie Brown February 28, 2018

EP Minerals, Reno, NV, USA

Julie Brown February 28, 2018

Exfoliators (Aust) Pty LTD

Graeme Raper February 28, 2018

Gulf Perlite LLC

Konstantin Mitsiou February 28, 2018