Bedrift M - Grålum
- Mynthè AS
- Megger AS
- Myosin AS
- Mekler1 AS
- Manpower AS
- Markedspartner AS
- Møbelsnekker Rahimic
- Mjt Holding AS
- Moseveien 16 AS
- Mero Holding AS
- Marek Modzelewcki
- Marlyn Smørsgård
- Millette Holding AS
- Martinsvingen Invest AS
- Madrub Holding AS
- Ma-Ni AS
- M-Fire AS
- Merinfo SA
- Malerfirma Hermansson AS
- Minkopi.no AS
- Mero Eiendom AS
- Maridalsveien 2 Avd.
- Maridalsveien 1 Avd.
- Magnar Nordtug
- Marie Guldteig
- Malin Nielsen
- Mazing AS Konkursbo
- Mazing AS Konkursbo
- Mangen Music
- MK Båt AS
- Makroneriet Ungdomsbedrift
- Marti Evju
- MT-Sanering AS
- Marion Haslien
- Minar Holding AS
- Mj Maskin AS
- Magnestad Holding AS
- Michal Olitkowski
- Mm Prosjekt AS
- Mrg Eiendom AS
- Mrg Holding AS
- Mesta AS Sarpsborg
- Min bygg AS
- Minibuss24-7 AS
- Mariannes Musikk Ervum
- Marian Kowalski Marys
- M Nilsen Consult
- Mustafa Bakr Majeed
- Magnus Ravneng Musikk
- M.V. Halvorsen
- Malermester Buer Østfold AS
- Malermester-Ronny Gulbrandsen AS
- May-Len Nordli
- Marinøkolog Iga-M. Nestorowicz
- Morten Hansens Akva Import
- Mr Engineering - Magnar Ringsrød
- Montørklubben Caverion Østfold syd
- Martin Lind Fysioterapi Sørensen
- Mm Eson Pac Norway AS
- Moss og Våler Næringspark AS
- Mettes Consulting Mette Andersen
- Manpower Staffing Services AS Avd Østfold
- Masur Møbelsnekkeri Jan Arve Pettersen