| Organizer | Country | Registered Events |
| M.A.F Servizi SRL | Italy | 1 |
| M.I.P. Group, a.s. | Czech Republic | 1 |
| Maack Business Services | Switzerland | 2 |
| Mack Brooks Exhibitions Inc. | USA | 1 |
| Mack Brooks Hellas SA | Greece | 2 |
| Mack-Brooks Exhibitions Ltd | UK - United Kingdom | 39 |
| MADE eventi srl | Italy | 1 |
| Magellance | France | 2 |
| Magenta Srl | Italy | 1 |
| Maghreb Centres de Contacts | Morocco | 3 |
| MAI Management Philippines | Philippines | 1 |
| Malaysian Exhibition Services | Malaysia | 5 |
| Maldives Exhibition & Conference Services (Pvt) Ltd | Maldives | 1 |
| MalpensaFiere S.p.A. | Italy | 1 |
| Mapcom Events | Belgium | 1 |
| Marketing & Exhibitions, Inc. | Philippines | 1 |
| Marketing Centre Expokhleb | Russia | 1 |
| Marketplace Events, LLC | USA | 29 |
| MarkExpo Ltd. | Spain | 1 |
| Mary Walker Exhibitions Ltd | UK - United Kingdom | 1 |
| Mashad International Exhibition Co. | Iran | 24 |
| Mashov Ltd. | Israel | 1 |
| Massachusetts Restaurant Association | USA | 1 |
| Master Promotions Ltd. | Canada | 29 |
| Matexpo | Belgium | 1 |
| MATRADE (Malaysian External Trade Developemnt Corporation) | Malaysia | 1 |
| MAZ - Messe- und Ausstellungszentrum Mühlengeez GmbH | Germany | 2 |
| MC2D (Monaco Développement Durable) | Monaco | 1 |
| MCH Foire Suisse (Holding) SA | Switzerland | 26 |
| MCH Foire Suisse (Zurich) SA | Switzerland | 8 |
| MCI France SAS | France | 2 |
| MCN (Medizinische Congressorganisation Nürnberg AG) | Germany | 1 |
| MEACO (Middle East African Council of Ophthalmology) | Saudi Arabia | 2 |
| Medcom | Morocco | 1 |
| Medexpert | India | 1 |
| Medi Expo ZAO | Russia | 1 |
| Media 10 Limited | UK - United Kingdom | 1 |
| Media Edge Communications Inc. | Canada | 2 |
| Media Exposition & Events | India | 6 |
| Media Force Trade Exhibitions | Turkey | 1 |
| Media Generation Exhibitions Ltd. | UK - United Kingdom | 1 |
| Media Group do Brasil | Brazil | 3 |
| Media Today Pvt Ltd. | India | 3 |
| MediaMax Events and Expos Inc. | USA | 7 |
| Mediateam Ltd. | Ireland | 2 |
| Medina Events | Tunisia | 1 |
| Meditheral Sarl | Algeria | 1 |
| MEEDEX (Meeting Destination Experts) | France | 1 |
| Meeting International Srl | Italy | 3 |
| Megavino sprl | Belgium | 1 |
| Meininger Verlag GmbH | Germany | 1 |
| Mek Promotion | Italy | 1 |
| Meorient International Exhibition | China | 2 |
| Mercator Media Ltd | UK - United Kingdom | 5 |
| Mercedes-Benz Fashion Week Istanbul | Turkey | 1 |
| Merchandise Mart Properties, Inc. | USA | 14 |
| Mercoferias Srl | Argentina | 1 |
| Merebo Messe Marketing | Germany | 14 |
| Meridyen Fair | Turkey | 2 |
| MESA GmbH | Germany | 12 |
| Mesago Messe Frankfurt Corp. | Japan | 8 |
| Mesago Messe Frankfurt GmbH | Germany | 20 |
| Mesago Messe Management GmbH | Germany | 3 |
| Mesago PCIM GmbH | Germany | 2 |
| Messe & Marketing Gmbh | Germany | 11 |
| Messe Augsburg | Germany | 4 |
| Messe Berlin GmbH | Germany | 22 |
| Messe Bremen | Germany | 2 |
| Messe Brünn | Germany | 27 |
| Messe Congress Graz | Austria | 2 |
| Messe Dresden | Germany | 1 |
| Messe Düsseldorf (Shanghai) Co., Ltd. | China | 8 |
| Messe Düsseldorf Asia | Singapore | 14 |
| Messe Düsseldorf GmbH | Germany | 136 |
| Messe Düsseldorf India Pvt. Ltd. | India | 5 |
| Messe Düsseldorf North America | USA | 3 |
| Messe Erfurt AG | Germany | 2 |
| Messe Essen GmbH | Germany | 28 |
| Messe Frankfurt (HK) Ltd. | Hong Kong | 19 |
| Messe Frankfurt (Shanghai) Co., Ltd | China | 15 |
| Messe Frankfurt Ausstellungen | Germany | 4 |
| Messe Frankfurt Feiras | Brazil | 1 |
| Messe Frankfurt France | France | 1 |
| Messe Frankfurt GmbH | Germany | 86 |
| Messe Frankfurt Mexico | Mexico | 2 |
| Messe Frankfurt Russia | Russia | 5 |
| Messe Frankfurt Trade Fairs India Pvt. Ltd. | India | 1 |
| Messe Frankfurt, Inc. | USA | 4 |
| Messe Freiburg | Germany | 10 |
| Messe Friedrichshafen | Germany | 18 |
| Messe Husum | Germany | 3 |
| Messe Magdeburg | Germany | 1 |
| Messe München GmbH | Germany | 95 |
| Messe Niederrhein GmBH | Germany | 1 |
| Messe Offenbach GmbH | Germany | 1 |
| Messe Offenburg-Ortenau GmbH | Germany | 15 |
| Messe Sindelfingen | Germany | 7 |
| Messe Stuttgart International | Germany | 48 |
| Messe Zentrum Bad Salzuflen | Germany | 1 |
| Messecenter Herning | Denmark | 9 |
| MesseHalle Hamburg-Schnelsen GmbH | Germany | 3 |
| Messen CMW | Austria | 3 |
| Messen und Events Michael Piesch | Germany | 11 |
| Messewelten GmbH | Germany | 1 |
| Metal Expert | Ukraine | 1 |
| Metal-Expo, JSC | Russia | 1 |
| Metallurgical Council of CCPIT | China | 1 |
| Metz Expo événements | France | 5 |
| Mezger | Germany | 1 |
| MFV Expositions | USA | 3 |
| MGH GmbH | Germany | 1 |
| MGMI (Mining, Geological & Metrological Institute of India) | India | 1 |
| MGPA (Malaysian Gifts And Premium Entrepreneur Association) | Malaysia | 1 |
| MHIA (Material Handling Institute of America) | USA | 2 |
| Miami International Wine Fair | USA | 1 |
| MIC (Ministerio de la Informatica y las Comunicaciones de Cuba) | Cuba | 1 |
| Micronora | France | 1 |
| Micropolis Besançon | France | 1 |
| Midessa Boat, RV, Sport & Gun Show | USA | 1 |
| MIFF Sdn Bhd | Malaysia | 1 |
| MIJ Exhibition Sdn Bhd | Malaysia | 1 |
| Milanez & Milaneze | Brazil | 1 |
| Milano Unica | Italy | 1 |
| Mining Communications Ltd | UK - United Kingdom | 4 |
| Ministére des Travaux Publics (Algérie) | Algeria | 1 |
| MinskExpo | Belarus | 37 |
| Mint | Turkey | 1 |
| Mir-Expo Exhibition Company | Russia | 1 |
| Mission économique de Rio de Janeiro | Brazil | 1 |
| MITI | Monaco | 1 |
| MJSA (Manufacturing Jewelers & Suppliers of America, Inc.) | USA | 1 |
| MMI India Pvt.Ltd. | India | 1 |
| MMPI Canada | Canada | 2 |
| Moda Barcelona | Spain | 2 |
| ModAmont SAS | France | 1 |
| Modena Esposizioni S.r.l. | Italy | 22 |
| Modtissimo | Portugal | 1 |
| Moldexpo | Moldova | 21 |
| Monaco Contact Sarl | Monaco | 1 |
| Monaco Mediax | Monaco | 5 |
| Monaco Yacht Show S.A.M. | Monaco | 1 |
| Mons-Expo | Belgium | 1 |
| Montgomery Africa | South Africa | 4 |
| Montgomery International | UK - United Kingdom | 16 |
| Morciano Fiere ed eventi | Italy | 1 |
| Morgane Events | France | 1 |
| Morskoy Salon JSC | Russia | 1 |
| Moscow Design Week | Russia | 1 |
| MosShoes | Russia | 1 |
| Mostra d'Oltremare S.p.A. | Italy | 3 |
| Motor Trend Auto Shows, Inc. | USA | 21 |
| MP Asia Pte Ltd | Singapore | 9 |
| MP Associates, Inc. | USA | 1 |
| MP International Pte Ltd | Singapore | 6 |
| MP Zhongmao Deray International (Shanghai) Pte Ltd | China | 1 |
| MPIF (Metal Powder Industries Federation) | USA | 1 |
| MS. Expo | France | 1 |
| MT Polska Sp. z o.o. | Poland | 10 |
| MT.Expos | France | 6 |
| MTA (Manufacturing Technologies Association) | UK - United Kingdom | 1 |
| MTF (Middle East Trade Fairs) | Egypt | 2 |
| MTI (Machinery Trade International Ltd) | UK - United Kingdom | 1 |
| Muéstralo, S.L. | Spain | 1 |
| Multimedia tre | Italy | 5 |
| Multiplus Feiras & Eventos | Brazil | 9 |
| Mundo Textil | Argentina | 3 |
| Munich Expo | Germany | 4 |
| Munich Trade Fairs (Shanghai) Co., Ltd. | China | 5 |
| Municipality of Jerusalem | Israel | 1 |
| Münster Messe-Congresse | Germany | 5 |
| MuseumExperts SAS | France | 1 |
| MUSIAD (Independent Industrialists and Businessmen’s Association) | Turkey | 5 |
| MUVEO GmbH | Germany | 1 |
| MVK - International Exhibition Company | Russia | 44 |
| Myriade Communication | Algeria | 1 |
