ASPANGER BERGBAU UND MINERALWERKE GMBH

Ashland

BASF SE

CANCARB LTD

DENKA COMPANY LIMITED

DOW INC

Eastman

FERRO CORP.

FMC CORPORATION

INEOS

Kraton Corporation

LABORATOIRES LABEMA

LUXFER MEL TECHNOLOGIES

Micropowders, Inc.

NORDISK PERLITE APS

Ocsial

SEKISUI KASEI

TRONOX INC

VENATOR MATERIALS PLC

Westlake Vinnolit GmbH & Co. KG