You will have to do your own research otherwise, but here are some that have been mentioned before:
Accentus
Accuscribe
Accustat Carolinas
Advanced Transcription, Inc.
Advanced Transcription Network
Aero Transcription Service, Inc.
All Type Inc.
A Stat Transcriptions
Amphion
Ascend
Cambridge Transcriptions
Cbay Systems
C & M Transcription
CMT Corporation
CNC Transcription
Cobb Medical Transcription, Inc.
C&C Transcription
DataKey MT
Employment Opportunities with PTS
Encompass
eMTS
ETransPlus Careers
Focus Infomatics
Freedom Type
Huntington Group Services
InterMountain Transcription Soultions
Kathy Yip & Associates
LTS
Lake Valley Transcription
MAG Mutual Healthcare Solutions, Inc.
Medical Linguistics
Medical Transcription Corporation
Medical Transcription Professionals
Medifax, Inc
MediScribe
Med-Tech Resource MedQuist
Medscribe Inc.
MTA - Virginia
Med-Ware
MedWrite
Midelfort Clinic
Melody MT Service
MXSecure
NEO Transcription
New England Medical Transcription
Northeast Transcription Incorporated
Outsourcing Solutions Inc.
P.J. Transcription
Peacehealth Clinic
Preferred Physician's Transcription, Inc.
Presynct
Princeton
Range Medical Transcription
Rapid Transcript Incorporated
RI Unlimited Transcription Solutions
RX Text
Scribes Canada Inc.
Scribes Voice and Data Services
Scribes Online
Scriptech
Silent Type, Inc
SoftScript
SpectraMedi
Spheris
SPi
TransHealth
Transolutions Inc.
USA Medical Transcription Inc.
Zylomed