| Organizer | Country | Registered Events |
| I Castelli Animati | Italy | 1 |
| IAAPA (International Association of Amusement Parks and Attractions) | USA | 3 |
| IACF (International Antiques & Collectors Fairs) | UK - United Kingdom | 5 |
| IBC | UK - United Kingdom | 1 |
| IBC Burkina | Burkina Faso | 1 |
| IBC USA Conferences Inc. | USA | 1 |
| IBE (International Business Events Ltd.) | UK - United Kingdom | 1 |
| IBMS (Institute of Biomedical Science) | UK - United Kingdom | 1 |
| IBP (Instituto Brasileiro de Petróleo, Gás e Biocombustíveis) | Brazil | 3 |
| Ibram (Instituto Brasileiro de Mineração) | Brazil | 2 |
| ICA (International Cartographic Association) | UK - United Kingdom | 1 |
| ICC Organization | Turkey | 1 |
| ICEE (International Conferences & Exhibitions Ltd) | UAE - United Arab Emirates | 1 |
| ICEM (International Company Exhibition Management) | Netherlands | 1 |
| ICIA (International Communications Industries Association Inc.) | USA | 3 |
| ICO (International Council of Ophtalmology) | USA | 1 |
| ICS (Congresos Internacionales S.A.) | Argentina | 1 |
| ICS (Indian Ceramic Society) | India | 1 |
| ICS Convention Design, Inc. | Japan | 6 |
| ICWE GmbH | Germany | 3 |
| IDA (Indian Dental Association) | India | 1 |
| IDG World Expo | USA | 2 |
| Idice SAS | France | 4 |
| IDIS Event | France | 1 |
| IDTechEx Ltd | UK - United Kingdom | 6 |
| IEC (International Exhibitions and Conferences) | Morocco | 3 |
| IEC (International Exhibition Centre) | Ukraine | 9 |
| IED Communications Ltd. | India | 1 |
| IEEE | USA | 3 |
| IEEMA (Indian Electrical & Electronics Manufacturers' Association) | India | 1 |
| IEG Uzbekistan | Uzbekistan | 9 |
| IETA/World Bank | Switzerland | 1 |
| IETF (Internet Engineering Task Force) | USA | 1 |
| IFAI (Industrial Fabrics Association International) | USA | 3 |
| IFE Portugal | Portugal | 1 |
| Ifema (Feria de Madrid) | Spain | 71 |
| IFG (International Fairs Group) | Egypt | 6 |
| IFO (Istanbul Fair Organization Ltd.) | Turkey | 4 |
| IFP (Institut français du pétrole) | France | 2 |
| IFP Iraq | Iraq | 4 |
| IFP Qatar | Qatar | 3 |
| Ifra | Germany | 2 |
| IFT (Institute of Food Technologists) | USA | 1 |
| IFTF (International Fur Trade Federation) | UK - United Kingdom | 1 |
| IFWexpo Heidelberg GmbH | Germany | 8 |
| Igedo Company | Germany | 3 |
| IGU (International Gas Union) | Denmark | 1 |
| IHA (International Housewares Association) | USA | 1 |
| IHMA (International Hologram Manufacturers Association) | UK - United Kingdom | 1 |
| IICF Secretariat | India | 1 |
| IIEC (Iran International Exhibitions Company) | Iran | 8 |
| IIR Exhibitions Ltd | UK - United Kingdom | 6 |
| IIR Exhibitions Pte Ltd | Singapore | 12 |
| IIR Middle East | UAE - United Arab Emirates | 17 |
| ILE (Institution of Lighting Engineers) | UK - United Kingdom | 1 |
| ILS/CCI Bayonne Pays Basque | France | 1 |
| Imag | Germany | 48 |
| Images Multimedia Pvt. Ltd. | India | 1 |
| Imago Techmedia Ltd | UK - United Kingdom | 3 |
| Imarest (Institute of Marine Engineering, Science and Technology) | UK - United Kingdom | 1 |
| IME (International Medical Events) | France | 1 |
| Impact Exhibition Management Co., Ltd. | Thailand | 1 |
| IMTMA (Indian Machine Tool Manufactuers Association) | India | 2 |
| in.Stuttgart Veranstaltungsgesellschaft mbH & Co. KG | Germany | 1 |
| Incheba Jsc | Slovakia | 34 |
| Incheba Praha, s.r.o. | Czech Republic | 26 |
| INDA (Association of the Nonwovens Fabrics Industry) | USA | 4 |
| Index (Conferences and Exhibitions Organisation Est) | UAE - United Arab Emirates | 12 |
| India ITME Society | India | 1 |
| India Knit Fair Association | India | 1 |
| India Travel Mart - ITM | India | 6 |
| India-Tech Foundation | India | 2 |
| Industrial Research Institute for Automation and Measurements PIAP | Poland | 1 |
| Inédit Publications SA | Switzerland | 1 |
| INEGMA (Institute for Near East and Gulf Military Analysis) | UAE - United Arab Emirates | 1 |
| Inexmoda | Colombia | 1 |
| InfoDomus | Spain | 1 |
| InfoEX-World Services Ltd. | Hong Kong | 3 |
| Infomedia 18 Ltd | India | 5 |
| InfoPro Communications | France | 17 |
| Infopromotions | France | 15 |
| Informa | Switzerland | 2 |
| Informa Exhibitions | UK - United Kingdom | 7 |
| Informa India | India | 5 |
| Informa Telecoms & Media | UK - United Kingdom | 6 |
| Informa Yacht Group | Switzerland | 1 |
| Information Today, inc. | USA | 2 |
| Infovel | Switzerland | 1 |
| Innovalia | Spain | 1 |
| Innovation Exhibitions | UAE - United Arab Emirates | 9 |
| Institución Ferial Alicantina | Spain | 17 |
| Institute of Industrial Exhibitions Co. Ltd. | Greece | 1 |
| Instituto de Ingenieros de Minas del Perú | Peru | 1 |
| Intelligent Exhibitions Ltd | UK - United Kingdom | 1 |
| Inter - Progress | Switzerland | 1 |
| Inter - Progress Cameroun | Cameroon | 1 |
| Inter Ads - Brooks Exhibitions (India) Pvt. Ltd | India | 5 |
| Interalia | Spain | 4 |
| InterBev Show Management | USA | 1 |
| Intergem Messe GmbH | Germany | 1 |
| Interior Design Show, MMPI | Canada | 1 |
| International Agri-Center, Inc. | USA | 1 |
| International Exchange & Cooperation Center of SAWS | China | 1 |
| International Exhibition Company BT 1 | Latvia | 35 |
| International Exhibitions, Inc. | USA | 1 |
| International Expo-Consults LLC | UAE - United Arab Emirates | 5 |
| International Exposition Co. | USA | 3 |
| International Fair Plovdiv | Bulgaria | 32 |
| International Fairs and Promotion (IFP) | Lebanon | 29 |
| International Horti Fair B.V. | Netherlands | 1 |
| International Katowice Fair Ltd. | Poland | 13 |
| International Magazines Ltd | UK - United Kingdom | 1 |
| International Pizza Expo | USA | 1 |
| Internationale Jaarbeurs van Vlaanderen | Belgium | 1 |
| Internet Society | USA | 2 |
| Interpoint Events | Australia | 1 |
| Intex Shanghai Co., Ltd. | China | 1 |
| Intrenasionale | Malaysia | 5 |
| Introductions Trade Shows | India | 6 |
| Inventech | France | 1 |
| ioSposa | Italy | 1 |
| IP Security Events & Media Ltd. | UK - United Kingdom | 1 |
| Ipack-Ima Spa | Italy | 5 |
| Ipama (Indian Printing Packaging and Allied Machinery Manufacturers Association) | India | 1 |
| Ipekyolu International Exhibitions Ltd. | Turkey | 2 |
| IPEMA (Indian poultry Equipment Manufacture's Association) | India | 1 |
| Ipex World | UK - United Kingdom | 1 |
| IPI (Industrial Promotions International) | Netherlands | 1 |
| IPIM - Macao Trade and Investment Promotion Institute | Macao | 1 |
| IQPC | UK - United Kingdom | 2 |
| IQPC India | India | 1 |
| Irish Services Ltd | Ireland | 4 |
| IRU (International Road Transport Union) | Switzerland | 1 |
| ISA (International Sign Association) | USA | 1 |
| ISASF (International Society for Advancement of Supercritical Fluids) | France | 2 |
| ISES (International Solar Energy Society) | Germany | 2 |
| ISF Secretariat | Japan | 1 |
| ISG France | France | 1 |
| ISGIO (International Society of Gastrointestinal Oncology) | USA | 1 |
| ISHRAE (Indian Society of Heating, Refrigerating and Airconditioning Engineers) | India | 1 |
| ISHS (International Society for Horticultural Science) | Belgium | 2 |
| ISLE (Indian Society of Lighting Engineers) | India | 1 |
| Israel Trade Fairs Center | Israel | 10 |
| ISRO (Indian Space Research Organisation) | India | 1 |
| ISSA (International Sanitary Supply Association) | USA | 4 |
| Italfiere Srl | Italy | 2 |
| ITE China | China | 1 |
| ITE Group Plc | UK - United Kingdom | 227 |
| ITE LLC MOSCOW | Russia | 26 |
| ITE Moda Ltd | UK - United Kingdom | 4 |
| ITE Uzbekistan | Uzbekistan | 23 |
| Itec | France | 3 |
| Iteca | Kazakhstan | 39 |
| Iteca Caspian Ltd | Azerbaijan | 22 |
| Iteca Kavkasia | Georgia | 1 |
| ITEI (International Trade & Exhibition India Pvt. Ltd) | India | 7 |
| Iter Srl | Italy | 2 |
| ITF (Istanbul Trade Fairs) | Turkey | 10 |
| Ithaca Business Media | UK - United Kingdom | 1 |
| ITMA (International Traffic Medicine Association) | Sweden | 1 |
| ITPO (India Trade Promotion Organisation) | India | 13 |
| ITPO (Iran Trade Promotion Org.) | Iran | 1 |
| ITRC (Iran Telecom Research Center) | Iran | 1 |
| ITS America | USA | 2 |
| ITU (International Telecommunication Union) | Switzerland | 3 |
| IVM (Industrie-Verband Motorrad Deutschland e.V.) | Germany | 1 |
| Izba Gospodarcza Wodociagi Polskie | Poland | 1 |
| Izfas | Turkey | 9 |
