M: 335 stores

• M Fredric
• MAC Cosmetics
• MAGIX
• MAQAM
• MC Sports
• MCM Electronics
• MGM Store
• MISSION Skincare
• MJ Trim
• MJM Online
• MLB.com
• MLB.tv
• MPGear
• MUZZY
• MacConnection
• MacMall
• MacSpeech
• Macaroni Grill
• Mack's Prairie Wings
• Mackage
• Mackenzie Limited
• Macys
• Madewell
• Madison Avenue Mall
• Magazine Agent
• Magazine Deals Now
• Magazine Discount Center
• Magazine Reader Mall
• MagazineBargains.com
• Magazineline
• Magazines.com
• Magellans
• Maggianos
• Maggie's Organics
• Magic Cabin
• Magic Jack
• Magic Kitchen
• Magic Prints
• MagnaLight
• Magnaflow Exhaust
• Maidenform
• Mail Order Comics
• Mailbu Pilates
• MainStay Suites
• Makai Bikes
• Makari
• MakeBeer.net
• Makeup Artists Choice
• Making It Big
• Mamapedia
• Man Alive
• Mandarina Duck
• Mango
• Manhattan Fruitier
• Manhattan Perfumes
• Manhattan Review
• Manhattanite
• Mantels Direct
• Mantis Garden
• MapEasy
• Maps
• Marciano
• MarcusUniforms.com
• Margaritaville
• Marie Callender's
• Marine Depot
• Mario Badescu
• Marissa Collections
• Market America Brands
• Marley Coffee
• Marrakech
• Marriott
• Marshalls
• Martha Pullen
• Martha Stewart Flowers
• Marvel
• Marvel Store
• Maryland Square
• Mason Shoe
• Mass Vision Sunglasses
• Massage Envy
• Massage Table Superstore
• Massage Warehouse
• Masseys
• Master Gardening
• Master Tanning Inc
• Match.com
• Maternique
• MatrixEyewear.com
• Mattel
• Mattress.com
• Maurices
• Max Furniture
• Max Studio
• Max and Chloe
• MaxSaver.Net
• Maxalife
• Maximum Slim
• May Yeung
• Mayer-Johnson
• McAfee
• McDonalds
• McFeely's
• Meaningful Beauty
• MedEx Supply
• MedScope
• Media Bakery
• Media Storage Center
• Medical Displays for Less
• MedicineCabinetShop.com
• Medicus
• Medieval Times
• Medifast
• Medifocus
• Medjet
• MegaBargainMall
• MegaCapacity
• MegaMeeting
• Megasuits
• Meghan Shop
• Meguiars Direct
• Meijer
• Melissa Joy Manning
• Melissa and Doug
• Melody Toys
• Melrose Jewelers
• Melting Pot
• Memorable Gifts
• Memory Suppliers
• MemoryEscape.com
• Men's Titanium & Tungsten Jewelry
• Men's Wearhouse
• MenScience
• Menards
• Mens Icon
• Mercantila
• Meringue Clothing
• Meritline
• Merrell
• Messina Jewelers
• Metal Mulisha
• Metal Wall Art
• MetalDetector.com
• MetroKitchen.com
• MetroPCS
• Mexicali Blues
• Michael Stars
• Michael Todd
• Michaels
• MicraLite Store
• MicronetOnly.com
• Microsoft Office Live
• Microsoft Store
• Microtel
• Mid America Sports Advantage
• Midas
• The Midi Store
• Midnight Velvet
• Mighty Leaf
• Mikasa
• Milanoo
• Miles Kimball
• Military Clothing
• Milk and Honey Shoes
• Mimoco
• MindWare
• Mineral Hygienics
• Mini in the Box
• Minnesota Workwear
• Mint.com
• Minted
• Misikko
• Misook
• Miss Selfridge Retail Ltd (US)
• Misses Dressy
• Mission Restaurant Supply
• MisterArt
• Mixbook
• Mobile Edge
• Mobile Home Parts Store
• Moccasins.com
• ModCloth
• ModaQueen.com
• Modamart
• Modells
• Modern Bathroom
• Modern Furniture Warehouse
• Modern Nursery
• ModernFurniture.com
• Moku Gift
• Mom 4 Life
• Mon Petit
• Monarchy
• Monet.com
• MoneyAisle
• MoneyStrands
• MonkeyBean Toys
• Mono Machines LLC
• MonogramWedding
• Monroe and Main
• Monster.com
• Montgomery Pens
• Moolka Toys
• Moon Costumes
• Moosejaw
• Morano Racing
• More Bar Stools
• More Bedding Sets
• More Bedroom Furniture
• More Bookcases
• More Bunk Beds
• More Daybeds
• More Dining Tables
• More Filing Cabinets
• More Fireplaces
• More Futons
• More Headboards
• More Kitchen Carts
• More Mattresses
• More Mirrors
• More Office Chairs
• More Platform Beds
• More Pub Sets
• More Wine Racks
• Morning Star
• Morrell Wine
• Morris 4x4 Center
• Moshi
• Mosquito Magnet
• Mosso Cloud Computing / Hosting
• Motel 6
• Motel Rocks
• Mother Nature
• Motherhood Maternity
• MotoSport
• Motor Medley
• MotorMint
• Motorcycle Superstore
• MotorcycleCenter.com
• Motorola
• Mount Zilla
• MountCenter.com
• Mountain Gear
• Mountain Hardwear
• Mountain Sports
• MountainBuggyStrollers.com
• Mounted Memories
• Mouth Man
• Moveout
• Movie Poster Shop
• MovieGoods
• MovieMars.com
• MovieTickets.com
• MovingBoxDelivery.com
• Moxie Equestrian
• Moxsie
• Mozy
• Mr Beer
• Mr Coffee
• Mr Z Accessories
• MrWatch
• Mrs Fields
• Mrs. Prindables
• Murad
• Murals Your Way
• Muscle and Strength
• MuscleSurf
• Museum Store Company
• Museum Way Pearls
• Music Box Attic
• The Music Den
• Music Factory Direct
• Music Parts Plus
• Music Space
• The Music Stand
• Music Treasures
• Music and Arts
• Music123
• MusicNotes
• MusicPower.com
• Musicians Friend
• MusiciansHut.com
• Musiciansbuy.com
• Muvee
• Muze Clothing
• Mwave
• MxMegastore
• My Bridesmaids Gifts
• My Business Gifts
• My Cleaning Products
• My Cleaning Supply.us
• My Digital Universe
• My Fantastic Bags
• My Favorite Bedding
• My Groomsmen Gifts
• My Jewelry Box
• My M&Ms
• My Miracle Baby
• My Nursing Uniforms
• My Own Labels
• My Parent Rewards
• My Salon Tools
• My Snoring Solution
• My Snuggie Store
• My Spice Sage
• My Sports Shop
• My Tea Shoppe
• My Ubby
• My Urban Child
• My Wedding Favors
• MyBinding.com
• MyChelle
• MyCorporation
• MyFax
• MyGofer.com
• MyGoodPuppy
• MyInkRefills.com
• MyMeeting123
• MyPix2Canvas
• MyProjectorLamps.com
• MyPublisher.com
• MyRadioStore
• MyStrollers
• MyToyBox.Com
• MyWorldGlobes.com
• mDiecast.com
• mark.
• metrostyle
• micfo
• momAgenda
• morfoods.com
• myOTCstore
• mySpaShop
• mychefstore
• myhosting