ACCIMIN SA DE CV

Pablo Rauh Hain June 8, 2018

PERLIPOL

Witold Derlatka May 24, 2018

Saint-Gobain Corporation

Heather Severn May 15, 2018

Perlite Canada, Inc., Saint-Pacome

Richard Barabe May 4, 2018

Saudi Perlite Ind.

Eng. Fahad Almojel February 28, 2018

Pull Rhenen b.v.

René van der Mark February 28, 2018

Persolite Products, Inc.

Kara Steiner February 28, 2018

Perlit-92 Kft.

Dr. Geza Farkas February 28, 2018

P.V.P. Industries, Inc.

pvpind February 28, 2018

Perlite Canada, Inc., Lachine

Richard Barabe February 28, 2018

Nordisk Perlite ApS

Jannick Knudsen February 28, 2018

Nor Cal Perlite, Inc.

Justin Clarke February 28, 2018

Minerales Y Fillers, S.L.

Jose Planas Casas February 28, 2018

Midwest Perlite Inc.

Keith Hoople February 28, 2018

Knauf Performance Materials GmbH

Werner Schwiebacher February 28, 2018

The Schundler Company, Edison, NJ, USA

Craig McKean 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

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

Greg Smith February 28, 2018

Whittemore Company, Inc.

Jeffrey Sheehy February 28, 2018