From 2019: 

A&R Logistics

Access Chemicals

Adaptiv ERP, LLC
Alabama State Port Authority
American Global Logistics

AMPORTS

ARRC Line
Ascend Performance Materials

ATD-American Tire Distributors 

APM Terminals Mobile, LLC
Bamberger Polymers International Corp
Barsan Global Logistics
BDP International

Blackberry Radar
BNSF

Brenntag Latin America

Bridge Commercial
CAI Logistics

California Cartage Company

Caterpillar

Celanese
CenterPoint Properties

Cheetah Chassis
Chevron Phillips Chemical

CIMC Intermodal Equipment 
CMA CGM

Colliers
Container Maintenance Corp., Inc.
ContainerPort Group, Inc.

Cyanco

DB Schenker
DCLI

DEDON Inc.

Dixie Cullen Interests Inc.

Dow Inc. 
Dunavant Global Logistics

Excargo Services
Expeditors International
ExxonMobil Chemical
FBD Partnership

Federal Maritime Commission 
FlexiVan

Florida East Coast Railway

Formosa Plastics Corporation, U.S.A.

Fortress Building Products

Four Hands

Fr. Meyer's Sohn

Fyffes North America 

GChem Solutions LLC

Gemini Corporation NV

Georgia Pacific
Georgia Ports Authority

Graphic Packaging International
GTG Technology Group

Gulf Intermodal Services
Gulf Winds International, Inc.
Hackett Associates
Haldor Topsoe, Inc.

Hamburg Sud North America Inc

Hapag Lloyd

HFF

Holt Logistics

Houston ISD
Hyundai Glovis

Igloo Products Corp

IMC Companies
IMS Worldwide

Intermodal Cartage Company

JCPenny

Jetco Delivery

Kansas City Southern

Land Transportation

Leschaco

Louisiana DOTD
LyondellBasell

M. Holland
Macquarie Infrastructure & Real Assets Inc.
Maersk

Mattel

Mediterranean Shipping Co (MSC)

Metrix Logistics Group, LLC

Milestone Chassis Company 

Modern Terminals

MTC Logistics, Inc

NACPC

National Shipping of America 

NFI Industries

NOCS
Norton Lilly International

OEC Group

OLAM
OOCL USA Inc.
Orion Engineered Carbons, LLC

Palmetto Railways

Panama Canal Authority
Parker & Company

Pier1 Import, Inc. 

Port Everglades
Port Freeport
Port Houston
Port Miami

Port of Antwerp

Port of Nansha, Guangzhou Port America

Port of Brownsville

Port of New Orleans

Port Tampa Bay
Ports America

Quietflex Manufacturing
Ravago Americas LLC
Regions Bank
RoadOne IntermodaLogistics
S/M Transportation

Sasol
Schneider National
Sealand - A Maersk Company
Sigma Recycling
Southern Bracing Systems Inc

Stolt-Nielsen USA Inc
Sunburst Truck Lines, Inc.

TCW, Inc.
Terminal Investment Corporation
Terminal Link Texas

Tern Services, Inc. 

Texan Shale Chemicals
Texas Trucking Association

The Coca-Cola Company

Toll Group 
TRAC Intermodal

Trans Ocean Bulk Logistics

TransGulf

Transplace Mexico

Tribute Energy, Inc.
Tricon Energy
USSA
V. Alexander & Co., Inc.
Vinmar International

Wallenius Wilhelmsen Logistics
Walmart

Xenon FS

XPO Logistics
ZIM American Integrated Shipping Company