As at April 10, 2012

Abu Dhabi Airports Company
Aeroport de Libreville
Aeroport de Quebec inc.
Aeroportos de Moçambique, E.P.
Aéroports de Montréal
Aéroports de Paris
Aeropuerto Internacional de Tocumen, S.A.
Airports Authority of India
Allegheny County Airport Authority
ANA - Aeroportos de Portugal, SA
Aruba Airport Authority N.V.
Austin-Bergstrom International Airport
Autoridad Aeroportuaria de Guayaquil
Boise Airport
Brisbane Airport Corporation
Broward County Aviation Department
CAAC East China Regional Administration
Calgary Airport Authority
CAM - Macau International Airport Co, Ltd
Changi Airport Group (S) Pte Ltd
Chicago Department of Aviation
City of College Park
City of Commerce City
City of Dallas Department of Aviation
City of Denver
City of Ekurhuleni
City of Milwaukee
Civil Aeronautics Administration, Taiwan
Civil Aviation Authority of Uganda
New Kunming International Airport
Curacao Airport Holding N.V.
Dallas LoveField Airport
Dallas/Fort Worth International Airport
Denver International Airport
Detroit Region Aerotropolis Development Corporation
DFW International Airport, Commercial Development
Domodedovo Development
Ekurhuleni Metropolitan Municipality, South Africa
El Paso International Airport
Federal Ministry of Aviation
Fort Wayne Allen County Airport Authority
Fraport AG
GACA - (PPP) Project
Gambia Civil Aviation Authority
General Mitchell International Airport
Ghana Airports Company Ltd
GMR Corporation
Greater Toronto Airports Authority
Halifax International Airport Authority
Hartsfield-Jackson Atlanta International Airport
Houston Airport System
IKIA International Airport
Indianapolis Airport Authority
Iran Airports Company
Kansas City Aviation Department
Kuwait Directorate of Civil Aviation
Kyiv Airport City
Los Angeles World Airports
Malaysia Airports Holdings Berhad
Manchester Airport Group
Memphis-Shelby County Airport Authority
Metropolitan Airports Commission
Metropolitan Washington Airport Authority
Minas Gerais State Government
Moscow Domodedovo Airport
Mumbai International Airport Pvt. Ltd.
Munich Airport
Northern Territory Airports Pty Ltd
Argentine Airports Authority
Panatropolis
Paris Region Economic Development Agency
Perth Airport
China West Airport Group
Polish Airports
Port of Oakland, Oakland International Airport
Prefeitura Municipal de São Gonçalo do Amarante - RN
Qingdao International Airport Group Co., Ltd.
Rah Shahr International Group
Redevelopment Authority of the City of Milwaukee
Rhode Island Airport Corporation
Riga International Airport
San Diego County Regional Airport Authority
San Francisco International Airport
Savannah Airport Commission
Schiphol Group
Servicios Aeroportuarios del Centro Norte (OMA)
Sociedad Aeroportuaria
SOGEAC, Guinea
Taoyuan International Airport Corporation Ltd.
TAV Airports Holding
Ted Stevens Anchorage International Airport
The Calgary Airport Authority
The Gateway To Milwaukee
US Department of Transportation
Wayne County Airport Authority
Wayne County EDGE