| Organizer | Country | Registered Events |
| M.I.P. Group, a.s. | Czech Republic | 1 |
| M.S.I. Vertriebsges.m.b.H. | Austria | 8 |
| Maack Business Services | Switzerland | 5 |
| Mack Brooks Hellas SA | Greece | 1 |
| Mack-Brooks Exhibitions Ltd | UK - United Kingdom | 15 |
| MACT S.A. | Greece | 1 |
| MADRPM (Ministère de l'Agriculture, du Développement Rural et des Pêches Maritimes) | Morocco | 1 |
| MAI Management Philippines | Philippines | 4 |
| Malaysian Exhibition Services | Malaysia | 12 |
| MalpensaFiere S.p.A. | Italy | 3 |
| marcus evans - Cyprus | Cyprus | 3 |
| marcus evans Ltd. | UK - United Kingdom | 3 |
| Mary Walker Exhibitions Ltd | UK - United Kingdom | 1 |
| Mashad International Exhibition Co. | Iran | 10 |
| Mashov Ltd. | Israel | 1 |
| Mass Media International d.o.o. | Serbia | 1 |
| Massachusetts Restaurant Association | USA - United States of America | 1 |
| Massive Conferences and Trade Fairs | Egypt | 2 |
| Matexpo | Belgium | 1 |
| Maxima | Russia | 8 |
| MC2D (Monaco Développement Durable) | Monaco | 1 |
| MCH Foire Suisse (Holding) SA | Switzerland | 31 |
| MCH Foire Suisse (Zurich) SA | Switzerland | 6 |
| MCI | France | 4 |
| MCI France | France | 2 |
| MCN (Medizinische Congressorganisation Nürnberg AG) | Germany | 1 |
| MCO Congrès | France | 1 |
| Medcom | Morocco | 1 |
| MEDI S.r.l. | Italy | 1 |
| Media Edge Communications Inc. | Canada | 11 |
| Media Force Trade Exhibitions | Turkey | 5 |
| Media Salon | France | 3 |
| Media Today Pvt Ltd. | India | 1 |
| Medialine | Russia | 1 |
| MediaLive International, Inc. | USA - United States of America | 4 |
| MediaMax Events and Expos Inc. | USA - United States of America | 4 |
| Mediamix | Algeria | 1 |
| Mediateam Ltd. | Ireland | 5 |
| MEEF International Event Management | Jordan | 3 |
| Meeting International Srl | Italy | 1 |
| Mercator Media Ltd | UK - United Kingdom | 1 |
| Mercoferias Srl | Argentina | 1 |
| Merebo Messe Marketing | Germany | 6 |
| Mesago Messe & Kongress GmbH | Germany | 11 |
| Mesago Messe Frankfurt Corp. | Japan | 8 |
| Mesago Messe Management GmbH | Germany | 1 |
| Mesago PCIM GmbH | Germany | 2 |
| Messe & Marketing Gmbh | Germany | 13 |
| Messe Augsburg | Germany | 3 |
| Messe Berlin GmbH | Germany | 21 |
| Messe Bremen | Germany | 1 |
| Messe Brünn | Germany | 34 |
| Messe Dresden | Germany | 2 |
| Messe Düsseldorf Asia | Singapore | 11 |
| Messe Düsseldorf China (Beijing) | China | 1 |
| Messe Düsseldorf China (Shanghai) | China | 9 |
| Messe Düsseldorf GmbH | Germany | 155 |
| Messe Düsseldorf North America | USA - United States of America | 4 |
| Messe Essen GmbH | Germany | 37 |
| Messe Frankfurt (HK) Ltd. | Hong Kong | 10 |
| Messe Frankfurt (Shanghai) Co., Ltd | China | 10 |
| Messe Frankfurt Ausstellungen | Germany | 11 |
| Messe Frankfurt Feiras | Brazil | 1 |
| Messe Frankfurt France S.A.S. | France | 1 |
| Messe Frankfurt GmbH | Germany | 90 |
| Messe Frankfurt Mexico | Mexico | 2 |
| Messe Frankfurt Middle East | UAE - United Arab Emirates | 12 |
| Messe Frankfurt Russia | Russia | 5 |
| Messe Frankfurt, Inc. | USA - United States of America | 6 |
| Messe Freiburg | Germany | 10 |
| Messe Friedrichshafen | Germany | 14 |
| Messe Husum | Germany | 4 |
| Messe Kassel | Germany | 1 |
| Messe Magdeburg | Germany | 1 |
| Messe München | Germany | 107 |
| Messe Offenbach GmbH | Germany | 1 |
| Messe Sindelfingen | Germany | 6 |
| Messe Sodeks Fuarcılık A.Ş. | Turkey | 5 |
| Messe Stuttgart International | Germany | 66 |
| Messe Zentrum Bad Salzuflen | Germany | 1 |
| Messecenter Herning | Denmark | 9 |
| Messen CMW | Austria | 1 |
| Messewelten GmbH | Germany | 8 |
| Messezentrum Salzburg | Austria | 2 |
| Metal Spain | Spain | 3 |
| Metal-Forum | Germany | 1 |
| Metz Expo | France | 7 |
| Mezger | Germany | 3 |
| MFK Exhibition Consulting Co. Ltd | China | 1 |
| MGH GmbH | Germany | 1 |
| MHIA (Material Handling Institute of America) | USA - United States of America | 2 |
| Miami International Wine Fair | USA - United States of America | 1 |
| Micronora | France | 1 |
| Miffel Organisation | France | 1 |
| Milanez & Milaneze | Brazil | 1 |
| Milano Unica | Italy | 1 |
| Mining Communications Ltd | UK - United Kingdom | 3 |
| Ministére des Travaux Publics (Algérie) | Algeria | 1 |
| MinskExpo | Belarus | 26 |
| Mint | Turkey | 1 |
| MITI | Monaco | 1 |
| MJSA (Manufacturing Jewelers & Suppliers of America, Inc.) | USA - United States of America | 1 |
| MNCCI (Mongolian National Chamber of Commerce & Industry) | Mongolia | 1 |
| Mo Productions | Belgium | 3 |
| Moda Barcelona | Spain | 1 |
| Modatex GmbH | Germany | 1 |
| Modena Esposizioni S.r.l. | Italy | 18 |
| Modtissimo | Portugal | 1 |
| Moldexpo | Moldova | 19 |
| Monaco Contact Sarl | Monaco | 1 |
| Monaco Mediax | Monaco | 6 |
| Monaco Plus | Monaco | 1 |
| Monaco Yacht Show | Monaco | 1 |
| Mondial Exhibition Comercio Messe Management | India | 1 |
| Mons-Expo | Belgium | 1 |
| Monte Carlo Travel Market | Monaco | 1 |
| Montgomery International | UK - United Kingdom | 19 |
| Morskoy Salon JSC | Russia | 1 |
| Mostra d'Oltremare S.p.A. | Italy | 7 |
| Motivate Events | UAE - United Arab Emirates | 1 |
| Motor Trend Auto Shows, Inc. | USA - United States of America | 23 |
| MP Asia Pte Ltd | Singapore | 9 |
| MP Associates, Inc. | USA - United States of America | 1 |
| MP Group (Meeting Planners International Pte Ltd.) | Singapore | 9 |
| MPIF (Metal Powder Industries Federation) | USA - United States of America | 1 |
| MRH France | France | 5 |
| MRI (Medical Records Institute) | USA - United States of America | 1 |
| MT Polska Sp. z o.o. | Poland | 8 |
| 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 | 3 |
| Multimedia tre | Italy | 8 |
| Mundo Textil | Argentina | 3 |
| Munich Trade Fairs (Shanghai) Co., Ltd. | China | 6 |
| Municipality of Jerusalem | Israel | 1 |
| Münster Messe-Congresse | Germany | 5 |
| MuseumExperts SAS | France | 1 |
| MVK Holding Company | Russia | 83 |
