Perlite Canada, Inc., Lachine

Richard Barabe February 28, 2018

Knauf Performance Materials GmbH

Werner Schwiebacher February 28, 2018

Midwest Perlite Inc.

Keith Hoople February 28, 2018

Nor Cal Perlite, Inc.

Justin Clarke 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

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

Bill King February 28, 2018

Sun Gro Horticulture Canada, Ltd., Quincy, MI, USA

Dan Johnson February 28, 2018

Sun Gro Horticulture Canada, Ltd., Pine Bluff, AR, USA

Bill Bumpass February 28, 2018

Supreme Perlite Company

Frank Petterson 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

Therm-O-Rock West Inc., Chandler, AZ, USA

Ronald Dobkin February 28, 2018

Whittemore Company, Inc., Lawrence, MA, USA

Jeffrey Sheehy February 28, 2018

IPM Industrial Mining S.A.

Orca Kirker February 28, 2018

Keltech Energies Limited

Santosh Chowgule 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

Infigro Natural Technologies

Anita Mulqueeny February 28, 2018

2002 Perlindustria SLU

Ramon Sitges Marques 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