- Abu Dhabi National Tanker Company
- Afton Chemical Asia Pacific LLC
- Alliance Oil and Gas LLC
- Alliance Refining Co. Ltd.
- Amato International
- Amerada Hess Corporation
- American Agip
- American Eagle Tankers (AET), Inc. Ltd.
- Americas Logistics Sourcing Leader
- Anders Utkilens Rederi AS
- Apache Corporation
- Arcadia Shipmanagement Co. Ltd.
- Aries Afretmentos Maritimos
- Aster Petroleo
- Atlantic Methanol Marketing LLC
- Atlantic Trading and Marketing, Inc.
- Bahrain National Gas Company
- Bangkok Synthetics Co., Ltd
- Barry Rogliano Salles
- Basell Polyolefins
- BASF Corporation
- Basic Chemical Solutions LLC
- BDP International Inc.
- Berkshire/Chemoil
- Biehl Co.
- BRS Middle East
- BP Chemicals
- BP Chemicals Malaysia
- BP Integrated Supply and Trading
- BP Korea Ltd.
- BP Pipelines (North America) Inc.
- BP Products North America
- BP Shipping
- BP Singapore Pte. Ltd.
- BP Trinidad & Tobago
- Braskem
- Brasilship/Scanbrasil Comercio Maritimo Ltda.
- Brostrom Tankers AB
- Cargill Petroleum
- Celanese Pte Ltd.
- Cendian Chemical Logistics
- CEPSA
- Chandris (Hellas) Inc.
- Charles R. Weber Company, Inc.
- Chem Coast Inc.
- Chemical Exchange Industries
- Chemium International Corp.
- ChemOil
- Chem-Tankers C.V.
- Chevron USA Inc.
- Chevron Tankers Ltd.
- ChevronTexaco
- Chung-Pin Enterprise Co. Ltd.
- CITGO Petroleum Corporation
- Clarkson Shipping Services USA Inc.
- Columbia Shipmanagement Ltd.
- Compania Espanola de Petroleos S. A. (CEPSA)
- Conchemco, Inc.
- ConocoPhillips
- Copenhagen Tankers
- Copeq Trading
- Cosmo Oil of U.S.A., Inc.
- Cove Point - LNG Pipeline
- Crowley Petroleum Services
- Crystal Pool Ltd.
- Deten Quimica S.A.
- Doric Tanker Chartering
- Dow Chemical Company
- Dow Hydrocarbons and Resources
- Duke Energy
- Duke Energy Field Services
- Dynegy
- Eastport Maritime
- Eastwind Maritime
- ECOPETROL S.A.
- Elekeiroz
- ENI Division Refining & Marketing
- Equinox Shipping & Trading LLC
- Estonian Oil Service
- Eurochem Maritime B.V.
- Evalend Shipping Co. S.A.
- Exxonmobil Asia Pacific Pte. Ltd.
- ExxonMobil Corp.
- Factor Gas
- Fairfield Tankers
- Fairway Maritime Corp.
- FAL Shipping Co. Ltd.
- Falcon Navigation Corporation
- Ferrell International Inc.
- Flint Hills Resources
- Formosa Plastics Corp.
- Fortrec Chemicals and Petroleum Pte. Ltd.
- FT Maritima LLC
- Gantrade Corp.
- General Maritime Mgmt LLC
- Glencore Ltd.
- Gold Bridge Shipping Ltd.
- Hess Corporation
- Hornbeck Offshore
- Hua Fu Energy Pte. Ltd.
- Iberica Tanker Chartering S.L.
- Imperial Oil Ltd.
- Indian Farmers Fertilizer Cooperative Ltd. (IFFCO)
- Indian Oil Corporation Ltd.
- Industrias Negromex
- S.A.
- Inge Steensland AS
- Innovene Korea
- Innovene LLC
- Integra Marketing Private Ltd.
- Integra US Marketing
- LLC
- Interchem 2000 Group
- International Marine Consultants
- Intertek Caleb Brett
- INVISTA S.a.r.L.
- Iwatani Int'l Corp. S'pore Branch
- JO Tankers B.V.
- Kanoo Shipping Agencies
- Kerr-McGee Chemical LLC
- Keyspan Energy Supply
- Koch Supply and Trading
- Kuwait Oil Tanker Company
- Latvian Shipping Company
- Laurin Maritime (America) Inc.
- Link Marine Pte. Ltd.
- Louis Dreyfus
- Lyondell Chemical Company
- Mabanaft BV
- Magna-Kron Corp. Ltd.
- MAPA Logistics
- Marathon Ashland Petroleum LLC
- Marine Tanker Service
- Marine Transport Corp.
- Marubeni
- Merichem Chemicals & Refinery Services LLC
- Methanol Holdings (Trinidad) Ltd.
- Military Sealift Command
- MISC Berhad
- Mitsubishi International Corp.
- Mitsui & Co.
- MJLF & Associates
- Morgan Stanley & Co.
- Morgan Stanley Capital Group Inc.
- Murphy Oil Network Chartering AS
- New England Tanker Chartering (NETCO)
- Nexen Inc.
- Noble Americas Corp.
- North Atlantic Refining Ltd.
- Novelmar S.r.L.
- Nyship Chartering
- Oasis Maritime
- Occidental
- Occidental Exploration and Production
- Odin Marine
- Oiltanking Mexico
- Oman Maritime
- OMI Corporation
- Operadora Maritima TMM
- S.A. de C.V.
- Optimal Group of Companies
- Oxiteno
- Oxyde Chemicals, Inc.
- Panamerican Chemical Marketing, Ltd.
- Panasia Marine (Tankers) Pte. Ltd.
- Pecten Chemicals, Inc.
- Pemex-Petroquimica
- Petredec Services Asia Pte. Ltd.
- PDVSA
- Petro Survey B.V.
- Petrobas
- Petrocel
- Petrochem Middle East FZE
- PetroChina
- PetroChina International America, Inc.
- Petroleos Mexicanos (Pemex Refinacion)
- Petrus SA
- Plastiglas de Mexico
- S.A. de C.V.
- Platts
- PMI Comercio Internacional
- Polibrasil
- Preem Petroleum AB
- Premcor Refining Group
- Pt. Nur Saly Pratama SL
- Rayong Refinery Public Company Ltd.
- Rhodia
- RVB Shipbrokers
- SABIC Americas, Inc.
- Safra Co. Ltd.
- Samsung America, Inc.
- Saybolt Trinidad & Tobago Ltd.
- Seabulk Tankers Inc.
- Seaport Hub Agencies, Inc.
- Seatrans DA
- SemMaterials L.P.
- Sempra Energy Trading Corp.
- Serromah Shipping
- SGS
- SH Marine Ltd.
- Shell Chemical LP
- Shell Oil Products
- Shell Trading (US) Company
- Shrieve Chemical Products, Inc.
- Simpson
- Spence & Young
- Singapore Petroleum Co. Ltd.
- Singapore Refining Company
- Sinochem (U.S.A.)
- Skaugen Petrotrans, Inc.
- SK Corporation
- Sprague Energy
- Star Petroleum Refining Company Ltd.
- Starsupply
- Statoil Marketing & Trading
- Southern Chemical Corporation
- Sterling Chemicals
- Stuyvesant Fuel Service Corp.
- Sumitomo Corp. Europe Ltd.
- Sunoco Inc.
- Supervisa Ltda.
- Tauber Oil Company
- Teekay Maritime Services
- Teekay Shipping Corp.
- Tequimar - Terminal Químico de Aratu
- Tesoro Corporation
- Texas Petrochemical LP
- The Plaza Group
- Tokyo Marine Co. Ltd.
- Top Tanker Management Inc.
- Total Petrochemicals USA, Inc.
- TOTAL SA
- TOTSA Total Oil Trading SA
- Tricon Energy
- Trafigura Pte. Ltd.
- Tuntex Petrochemicals (Thailand) PLC
- UCT United Chemical Transport GmbH
- Unigas International Inc.
- Unocal Thailand, Ltd.
- UPT United Product Tankers GmbH
- Valero Energy
- Varun Shipping Co. Ltd.
- Vela Int'l Marine Ltd.
- Villacero-Sicartsa
- Voest-Alpine Intertrading USA, Inc.
- Vitol
- Vships USA
- VTMs ApS
- Winsway
- XERAY Systems, Inc.
- Yemen Hunt Oil Company.