| Name | Country | Market Cap (US$) |
|---|
| Lucent Technologies Network Systems GmbH | Germany | Private |
| Ludicorp Research & Development Ltd. | United Kingdom | Private |
| Lufthansa Systems Airline Services GmbH | Germany | Private |
| Lufthansa Systems Infratec GmbH | Germany | Private |
| Lukoil-inform OOO | Russia | Private |
| Lumicyte Inc | United States | Private |
| LUTECH SPA | Italy | Private |
| Lycos Eastern Europe GmbH | Germany | Private |
| Lycos Europe Gmbh | Germany | Private |
| Lycos France | France | Private |
| Lycos Korea Co Ltd | South Korea | Private |
| Lycos, Inc. | United States | Private |
| LYNX TECHNOLOGY LTD | United Kingdom | Private |
| LYNXSERV LTD | United Kingdom | Private |
| Lyonnaise Des Eaux | France | Private |
| Lyris Technologies, Inc | United States | Private |
| M + W Zander Facility Management Gmbh | Austria | Private |
| M B N A Hallmark Information Services, Inc | United States | Private |
| M D A HUB LTD | United Kingdom | Private |
| M I S I Co Ltd | United States | Private |
| M X TELECOM LTD | United Kingdom | Private |
| M-net Telekommunikations GmbH | Germany | Private |
| M.I. Montreal Informática Ltda. | Brazil | Private |
| M.P. Media-Print Informationstechnologie GmbH | Germany | Private |
| M2S Sverige AB | Sweden | Private |
| MACDONALD DETTWILER & ASSOCIATES LTD | United Kingdom | Private |
| Mach ApS | Denmark | Private |
| Machinetools.Com LLC | United States | Private |
| Macrosearch Inc | United States | Private |
| Maden Tech Consulting Inc | United States | Private |
| Madison Research Corporation | United States | Private |
| Main Sail Llc | United States | Private |
| Major League Baseball Advanced Media, L.P. | United States | Private |
| MAKUprojekt GmbH Informations- und Kommunikationstechnik | Germany | Private |
| MALAM COMMUNICATION & COMPUTERS LTD. | Israel | Private |
| MALTA INFORMATION TECHNOLOGY & TRAINING SERVICES LTD | Malta | Private |
| MaMaMedia Inc. | United States | Private |
| Management Systems Designers, Inc | United States | Private |
| Mapa Digital Processamento De Imagens Ltda | Brazil | Private |
| MAPFRE INFORMATICA A I E. | Spain | Private |
| MAPFRE SERVICIOS DE INFORMATICA SA | Spain | Private |
| Marathon International Group, Inc. | United States | Private |
| Marben S.A. | France | Private |
| Mariah Media, Inc. | United States | Private |
| Market Street Advisors | United States | Private |
| MARKETING CENTER CO.,LTD. | Japan | Private |
| MARKETING CORE, K.K. | Japan | Private |
| MARKETING INFORMATION COMMUNITY, K.K. | Japan | Private |
| Marktkauf IT Informationstechnologie GmbH | Germany | Private |
| Marrakech Ltd | Republic of Ireland | Private |
| MARS TECHNO SCIENCE CORP. | Japan | Private |
| MARUBENI MANAGEMENT RESOURCE K.K. | Japan | Private |
| Mascon Global Technologies, Inc | United States | Private |
| Mason Group Ltd | United Kingdom | Private |
| MASTEK (UK) SYSTEMS LTD. | United Kingdom | Private |
| MASTERPIECE INC. | Japan | Private |
| Matcom International Corporation | United States | Private |
| Matrix Information Consulting Inc | United States | Private |
| MATSUSAKA EDP CENTER CO.,LTD. | Japan | Private |
| MAV INFORMATIKA Kereskedelmi, Szolgaltato es Tanacsado Korlatolt | Hungary | Private |
| Maven Technologies, LLC | United States | Private |
| Maxdata Computer AG | Switzerland | Private |
| MCDATA INTERNATIONAL LTD | United Kingdom | Private |
| McDonald Bradley, Inc. | United States | Private |
| MCKESSON FINANCIAL HOLDINGS LTD | Republic of Ireland | Private |
| MCKESSON INFORMATION SOLUTIONS IRELAND LTD | Republic of Ireland | Private |
| MCKESSON INTERNATIONAL HOLDINGS LTD | Republic of Ireland | Private |
| MCKESSON INTERNATIONAL IRELAND LTD | Republic of Ireland | Private |
| MCY.COM, INC. | United States | Private |
| MDA CHANNEL LTD | United Kingdom | Private |
| MDeverywhere, Inc | United States | Private |
| MDLinx, Inc. | United States | Private |
| MECONSA INGENIERIA INFORMATICA SA | Spain | Private |
| Medem, Inc. | United States | Private |
| MEDIA MARKT TV-HiFi-Elektro GmbH Hamburg-Harburg | Germany | Private |
| Media Service Gmbh | Germany | Private |
| Media Service Inc | United States | Private |
| MediaBin Inc | United States | Private |
| MediaBrains, Inc | United States | Private |
| MediaPost Communications | United States | Private |
| MediaSpan Group, Inc. | United States | Private |
| MediaVast, Inc. | United States | Private |
| Medical Mutual Services Llc | United States | Private |
| Medical Present Value | United States | Private |
| Medio Systems Incorporated | United States | Private |
| MEDIOSYSTEM SPA | Italy | Private |
| MedManage Systems, Inc. | United States | Private |
| Medquist Transcriptions, Ltd., Inc. | United States | Private |
| Medscape, Inc. | United States | Private |
| Medsite, Inc. | United States | Private |
| MegaPath Networks Inc | United States | Private |
| MEHISH COMPUTER SERVICES LTD. | Israel | Private |
| MEIJI YASUDA JIMU SERVICE K.K. | Japan | Private |
| MEILLEURTAUX | France | Private |
| MEITETSU COM CO.,LTD. | Japan | Private |
| MENTOR GRAPHICS (HOLDINGS) LTD | Republic of Ireland | Private |
| Merallis Company (Inc), The | United States | Private |
| Mercata, Inc. | United States | Private |
| MercExchange LLC | United States | Private |
| Merchant Services Inc | United States | Private |
|
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