- Luball Products & Agencies (P) Ltd
- LVK Enviro Consultants
- Lynx Shipping Lines Pvt. Ltd
- M B J Chemicals P Ltd
- M Cees Logistics Pvt Ltd
- M K Moorthy Engineering
- M Moiz & Co
- M R F
- M S C A S
- M.C.T. SHIPPING AGENCY PVT. LTD
- M.E.S. SERVICES
- M.H.IMPEX
- M.J.R. Air-conditioner Service
- m.k.s. automotive pvt. ltd
- M.S. MUSH INDIA
- M/s Asthaa Hi Techs
- M/S Ennore Tank Terminals Private Limited
- M/s Shasons
- M/S Victor Consultancy and Services
- M/s. IG3 Infra Limited
- M/s. Lakshmi Machines
- M/S. NAVEEN'S
- M/s.Sical Logistics Ltd
- M2 Venturez
- MAARUTI COLOR
- Maas Industrial Automations
- MAAS SHIPSTORES
- Mac Machine Tools
- MACC Developers
- Maclellan a division of haden josts engineering india ltd.
- Macson Oil Company
- Madhav Associates
- Madras Container Terminal
- Madras Diamond Tools
- Madras Fire Protection Equipments & Services
- Madras Flying Club
- Madras Housing & Constructions
- Madras Hydraulic Hose P Ltd
- Madras Laundry House
- Madras Marine Propulsion Systems Pvt Ltd
- Madras Oil Company
- Madras Security Printers Pvt Ltd (MSPPL)
- Madras Steels And Tubes
- Maersk Line (Chennai)
- MAERSK LINE (cochin)
- Maestro & Co
- Maggi Car Wash
- Magic Wall Construction Products Pvt Ltd
- Magna International
- Magna Publishing Co. Ltd, chennai
- Magnath Agencies
- Mahadhi Enterpriese
- Mahajeyam Global Trading
- MAHASRI ENTERPRISES
- Mahatha Petroleum Private Limited
- Mahaveer Electric Agencies Madras
- MAHAVEER ELECTRIC COMPANY
- Mahayogam Homes
- Mahendra Metal Corporation -
- Maika Metals Pvt Ltd
- Majestic Tyre Centre
- Mak Logistics Pvt. Ltd
- Mak Technical Services
- MAK Trading Madhusudan
- Makers Pharma Pvt. Ltd.
- Makwell Container Care
- Malainur Constructions
- MALAR ENTERPRISES
- Malladi Drugs And Pharmaceuticals Limited
- Malli Facility Services Pvt. Ltd
- MAN Diesel & Turbo India Ltd., MAN PrimeServ Chennai
- Manali Lubricants
- Manali Lubricants Private Limited
- Manali Petrochemical Ltd
- Manali Petrochemicals
- Manali Petrochemicals Limited
- MANDI OCEANIC
- MANI AGRO CHEM PVT LTD
- Manna Chemicals
- Manthan Vidyashram
- MANTHIRA ASSOCIATE , tank cleaning contractor
- Mantra Gold Coatings
- Maranatha Engineers
- Marcons Shipping Services Pvt. Ltd.
- MARIA ENGG WORKS
- Maria Engineering
- Maria Engineering Works
- MARINE AIDS
- Marine Container Services (South) Pvt. Ltd
- Marine container services s pvt. ltd.(CHEN)
- MARINE EQUIPMENT SERVICE COMPANY
- Marine Integrated Services Pvt Ltd
- Marine Sales and Services
- Marisons Enterprises
- MARiTECH COMMERCIAL PVT. LTD.
- Maritel Communications
- Maritime Overseas Corporation/ Gold Member
- Marsons Shipping & Logistics
- Marutham Group
- MARUTHI ENTERPRISES