| Organisateur | Pays | Salons enregistrés |
| M.I.P. Group, a.s. | Rép. Tchèque | 1 |
| Maack Business Services | Suisse | 3 |
| Mack Brooks Exhibitions Inc. | USA | 1 |
| Mack Brooks Hellas SA | Grèce | 1 |
| Mack-Brooks Exhibitions Ltd | Royaume Uni | 24 |
| MADE eventi srl | Italie | 1 |
| Magenta Srl | Italie | 1 |
| MAI Management Philippines | Philippines | 1 |
| Mairie de Pantin | France | 1 |
| Malaysian Exhibition Services | Malaisie | 7 |
| MalpensaFiere S.p.A. | Italie | 2 |
| Mapcom Events | Belgique | 1 |
| Marketing & Exhibitions, Inc. | Philippines | 1 |
| Marketing Centre Expokhleb | Russie | 2 |
| Marketplace Events, LLC | USA | 24 |
| Mary Walker Exhibitions Ltd | Royaume Uni | 1 |
| Mashad International Exhibition Co. | Iran | 1 |
| Mashov Ltd. | Israël | 1 |
| Massachusetts Restaurant Association | USA | 1 |
| Master Promotions Ltd. | Canada | 27 |
| Matexpo | Belgique | 1 |
| MAZ - Messe- und Ausstellungszentrum Mühlengeez GmbH | Allemagne | 2 |
| MC2D (Monaco Développement Durable) | Monaco | 1 |
| MCH Foire Suisse (Holding) SA | Suisse | 29 |
| MCH Foire Suisse (Zurich) SA | Suisse | 6 |
| MCI France SAS | France | 3 |
| MCN (Medizinische Congressorganisation Nürnberg AG) | Allemagne | 1 |
| MEACO (Middle East African Council of Ophthalmology) | Arabie Saoudite | 2 |
| Mecom Forums | EAU - Émirats Arabes Unis | 1 |
| Medcom | Maroc | 1 |
| Medexpert | Inde | 1 |
| Medi Expo ZAO | Russie | 1 |
| MEDI S.r.l. | Italie | 1 |
| Media 10 Limited | Royaume Uni | 1 |
| Media Edge Communications Inc. | Canada | 4 |
| Media Exposition & Events | Inde | 6 |
| Media Force Trade Exhibitions | Turquie | 1 |
| Media Generation Exhibitions Ltd. | Royaume Uni | 2 |
| Media Group do Brasil | Brésil | 4 |
| Media Today Pvt Ltd. | Inde | 3 |
| MediaMax Events and Expos Inc. | USA | 6 |
| Mediateam Ltd. | Irlande | 3 |
| Medina Events | Tunisie | 3 |
| MEEDEX (Meeting Destination Experts) | France | 1 |
| MEEM (Magnum Events and Exhibition Management) | Bahreïn | 2 |
| Meeting International Srl | Italie | 2 |
| Megavino sprl | Belgique | 1 |
| Meininger Verlag GmbH | Allemagne | 1 |
| Mek Promotion | Italie | 1 |
| Mercator Media Ltd | Royaume Uni | 2 |
| Merchandise Mart Properties, Inc. | USA | 12 |
| Mercoferias Srl | Argentine | 1 |
| Merebo Messe Marketing | Allemagne | 21 |
| MESA GmbH | Allemagne | 5 |
| Mesago Messe Frankfurt Corp. | Japon | 9 |
| Mesago Messe Frankfurt GmbH | Allemagne | 10 |
| Mesago Messe Management GmbH | Allemagne | 1 |
| Mesago PCIM GmbH | Allemagne | 2 |
| Mess Around | France | 1 |
| Messe & Marketing Gmbh | Allemagne | 12 |
| Messe Augsburg | Allemagne | 4 |
| Messe Berlin GmbH | Allemagne | 18 |
| Messe Bremen | Allemagne | 2 |
| Messe Brünn | Allemagne | 30 |
| Messe Congress Graz | Autriche | 1 |
| Messe Dresden | Allemagne | 1 |
| Messe Düsseldorf (Shanghai) Co., Ltd. | Chine | 7 |
| Messe Düsseldorf Asia | Singapour | 9 |
| Messe Düsseldorf China (Beijing) | Chine | 1 |
| Messe Düsseldorf GmbH | Allemagne | 137 |
| Messe Düsseldorf North America | USA | 3 |
| Messe Erfurt AG | Allemagne | 2 |
| Messe Essen GmbH | Allemagne | 29 |
| Messe Frankfurt (HK) Ltd. | Hong-Kong | 19 |
| Messe Frankfurt (Shanghai) Co., Ltd | Chine | 15 |
| Messe Frankfurt Ausstellungen | Allemagne | 4 |
| Messe Frankfurt Feiras | Brésil | 1 |
| Messe Frankfurt France | France | 2 |
| Messe Frankfurt GmbH | Allemagne | 87 |
| Messe Frankfurt Mexico | Mexique | 2 |
| Messe Frankfurt Russia | Russie | 5 |
| Messe Frankfurt Trade Fairs India Pvt. Ltd. | Inde | 1 |
| Messe Frankfurt, Inc. | USA | 5 |
| Messe Freiburg | Allemagne | 10 |
| Messe Friedrichshafen | Allemagne | 18 |
| Messe Husum | Allemagne | 3 |
| Messe Kassel | Allemagne | 1 |
| Messe Magdeburg | Allemagne | 1 |
| Messe München | Allemagne | 98 |
| Messe Niederrhein GmBH | Allemagne | 1 |
| Messe Offenbach GmbH | Allemagne | 1 |
| Messe Offenburg-Ortenau GmbH | Allemagne | 16 |
| Messe Sindelfingen | Allemagne | 7 |
| Messe Stuttgart International | Allemagne | 57 |
| Messe Zentrum Bad Salzuflen | Allemagne | 1 |
| Messecenter Herning | Danemark | 9 |
| Messen CMW | Autriche | 3 |
| Messewelten GmbH | Allemagne | 1 |
| Metal Expert | Ukraine | 1 |
| Metal-Expo, JSC | Russie | 1 |
| Metal-Forum | Allemagne | 1 |
| Metallurgical Council of CCPIT | Chine | 1 |
| Metz Expo événements | France | 5 |
| Mezger | Allemagne | 2 |
| MFV Expositions | USA | 3 |
| MGH GmbH | Allemagne | 1 |
| MGMI (Mining, Geological & Metrological Institute of India) | Inde | 1 |
| MGPA (Malaysian Gifts And Premium Entrepreneur Association) | Malaisie | 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 |
| MIFF Sdn Bhd | Malaisie | 1 |
| Miffel Organisation | France | 1 |
| MIJ Exhibition Sdn Bhd | Malaisie | 2 |
| Mike & Lu Veissid | Royaume Uni | 1 |
| Milanez & Milaneze | Brésil | 1 |
| Milano Unica | Italie | 1 |
| Minatec | France | 1 |
| Mining Communications Ltd | Royaume Uni | 3 |
| Ministère de la Jeunesse et des Sports du Maroc | Maroc | 1 |
| Ministére des Travaux Publics (Algérie) | Algérie | 1 |
| MinskExpo | Bélarus | 64 |
| Mint | Turquie | 1 |
| Mir-Expo Exhibition Company | Russie | 1 |
| Mission économique de Rio de Janeiro | Brésil | 1 |
| MITI | Monaco | 1 |
| MJSA (Manufacturing Jewelers & Suppliers of America, Inc.) | USA | 1 |
| MMI India Pvt.Ltd. | Inde | 1 |
| MMPI Canada | Canada | 2 |
| MMPI Los Angeles | USA | 1 |
| Moda Barcelona | Espagne | 1 |
| ModAmont SAS | France | 1 |
| Modena Esposizioni S.r.l. | Italie | 20 |
| Modtissimo | Portugal | 1 |
| Moldexpo | Moldavie | 18 |
| Monaco Contact Sarl | Monaco | 1 |
| Monaco Mediax | Monaco | 5 |
| Monaco Yacht Show S.A.M. | Monaco | 1 |
| Mons-Expo | Belgique | 1 |
| Montane Comunicación, S.L. | Espagne | 1 |
| Monte Carlo Travel Market | Monaco | 1 |
| Montgomery Africa | Afrique du Sud | 3 |
| Montgomery International | Royaume Uni | 17 |
| Morciano Fiere ed eventi | Italie | 1 |
| Morskoy Salon JSC | Russie | 1 |
| Mostra d'Oltremare S.p.A. | Italie | 7 |
| Motor Trend Auto Shows, Inc. | USA | 21 |
| MP Asia Pte Ltd | Singapour | 8 |
| MP Associates, Inc. | USA | 1 |
| MP International Pte Ltd | Singapour | 8 |
| MPIF (Metal Powder Industries Federation) | USA | 1 |
| MSI Fairs & Exhibitions | Russie | 3 |
| MT Polska Sp. z o.o. | Pologne | 9 |
| MTA (Manufacturing Technologies Association) | Royaume Uni | 1 |
| MTF (Middle East Trade Fairs) | Égypte | 1 |
| MTI (Machinery Trade International Ltd) | Royaume Uni | 1 |
| Muéstralo, S.L. | Espagne | 1 |
| Multimedia tre | Italie | 6 |
| Multiplus Feiras & Eventos | Brésil | 8 |
| Mumbai Boat Show Pvt. Ltd. | Inde | 1 |
| Mundo Textil | Argentine | 3 |
| Munich Trade Fairs (Shanghai) Co., Ltd. | Chine | 8 |
| Municipality of Jerusalem | Israël | 1 |
| Münster Messe-Congresse | Allemagne | 5 |
| MuseumExperts SAS | France | 1 |
| MUSIAD (Independent Industrialists and Businessmen’s Association) | Turquie | 5 |
| MUVEO GmbH | Allemagne | 1 |
| MVK - International Exhibition Company | Russie | 39 |
| My Events International | Malaisie | 1 |
