M
- MM & T Bank
- MMacDermid Alpha Electronic Solutions
- MMaddie Cakes
- MMailPro, Inc.
- MMakdad Industrial Supply Co., Inc.
- MMaking Waves Hair Salon
- MMama Randazzo's, Inc.
- MManpower Inc., of Altoona
- MMansion Donut Company
- MMarCia's Chocolates
- MMarcus & Mack, PC
- MMarianna's Fundraisers
- MMattern House, Inc.
- MMauk & Yates Funeral Home, Inc.
- MMBG Protection Investigations KARMA
- MMBS Keystone
- MMcAleer's Plumbing, Heating & A/C, Inc.
- MMcCartney's Workplace Solutions
- MMcLanahan Corporation
- MMcLaughlin Oil & Propane Co.
- MMcQuaide Blasko, Inc.
- MMerakey
- MMichael J. Wagner Attorney at Law P.C.
- MMichelle Barnes Optometry, P.C.
- MMicrotel Inn & Suites by Wyndham, Altoona
- MMid Penn Bank
- MMidstate Tool & Supply, Inc.Wholesale
- MMighells Brothers Excavating, Inc
- MMihalko's General Contracting
- MMile Level Physical Therapy
- MMill Hill Farm Supply, Inc.
- MMinetech Engineers, Inc.
- MMonitronics/Brinks Home
- MMoore Power Sales, Affiliate of Sandler Training
- MMorefield Communications, Inc.
- MMosebach Electric
- MMountain Filtration Systems, Inc
- MMountain Research, LLC
- MMountain View Eye Associates
- MMulti-Color Corporation
- MMyers-Somers Funeral Home, Inc.