M Stores
- Maaji
- Macade Golf
- Maceoo Global
- MacKeeper
- Mackie
- Macondostore INT
- Macorner
- Mac Sales
- Macy's
- MadaLuxe Time
- Made Trade
- Madewell US
- Magid Glove & Safety
- MAGIX Software & VEGAS Creative Software
- Magnifi
- Magu.co
- Magzter - Digital Magazine Newsstand
- Mailchimp
- Mailchimp International
- Maingear Custom PCs
- Maison Margiela Fragrances
- MakeUp Eraser
- Malwarebytes
- Mango turkey
- Mango US
- Mano's Wine
- Mapiful
- Marc Fisher
- Marshall Headphones
- Marshalls
- MARTA LARSSON
- Match.com
- Mattress Firm
- Mavis Tires
- Maxaroma
- Maytag
- MBAETZ-SHOES - INT
- McAfee EMEA
- McAfee NA
- McGraw Hill Higher Education
- Meater
- Meder Beauty UK/EU
- Meder Beauty US
- Medik8
- Medix Select
- Meetup
- MEGA
- MegaZip
- MeldaProduction INT
- MelodySusie
- Men's Tuxedo USA
- Men's USA
- Mercatalyst (MorningSave, Meh, SideDeal)
- MessyWeekend
- MetroFax
- MFI Medical
- Michael Kors
- Michaels Stores
- Michele Watches
- Michelin Guide Hotels
- Microdose
- Mikasa
- Miken Sports
- MillionaireMatch
- Milo Art Supplies
- Mindware.com
- minifinder
- MiniTool
- Miracle
- Mirador Outdoor Living
- MMOGA Ltd. US
- M&M's
- Mobile Pixels
- Mockberg
- Moda Operandi
- ModCloth
- Modelones.com
- Modern Bathroom
- Modlily
- Modloft
- Mohito.com
- Moira Cosmetics
- Momentous
- Momofuku
- Momondo US
- Mondly
- Monkeymum.com
- Monnier Paris
- Monoprice
- Monosuit
- Monport
- Monster NA B2B
- Montblanc
- MonthlyClubs.com™
- moo.com US
- Moose Knuckles
- Morgenthal Frederics
- Moschino
- Motivated
- Motorola